/* ==================== shadcn Design Tokens ==================== */
:root {
    --radius: 0.625rem;

    /* Additional semantic tokens */
    --success: 142 76% 36%;
    --success-foreground: 144 80% 91%;
    --warning: 38 92% 50%;
    --warning-foreground: 48 96% 89%;

    /* Safe area insets for PWA */
    --safe-area-inset-top: env(safe-area-inset-top, 0px);
    --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-inset-left: env(safe-area-inset-left, 0px);
    --safe-area-inset-right: env(safe-area-inset-right, 0px);
}

/* Light theme (default) - shadcn defaults */
:root, [data-theme="light"] {
    --background: 0 0% 100%;
    --foreground: 0 0% 9%;

    --card: 0 0% 100%;
    --card-foreground: 0 0% 9%;

    --popover: 0 0% 100%;
    --popover-foreground: 0 0% 9%;

    --primary: 0 0% 12%;
    --primary-foreground: 0 0% 98%;

    --secondary: 0 0% 96%;
    --secondary-foreground: 0 0% 12%;

    --muted: 0 0% 96%;
    --muted-foreground: 0 0% 45%;

    --accent: 0 0% 96%;
    --accent-foreground: 0 0% 12%;

    --destructive: 0 84% 60%;
    --destructive-foreground: 0 0% 98%;

    --border: 0 0% 90%;
    --input: 0 0% 90%;
    --ring: 0 0% 64%;

    /* Links */
    --link: 221 83% 53%;
    --link-foreground: 221 83% 43%;

    /* Chart colors - shadcn defaults */
    --chart-1: 25 95% 53%;
    --chart-2: 173 58% 39%;
    --chart-3: 220 14% 46%;
    --chart-4: 43 96% 56%;
    --chart-5: 27 96% 61%;
}

/* Dark theme - shadcn defaults */
[data-theme="dark"] {
    --background: 0 0% 9%;
    --foreground: 0 0% 98%;

    --card: 0 0% 12%;
    --card-foreground: 0 0% 98%;

    --popover: 0 0% 17%;
    --popover-foreground: 0 0% 98%;

    --primary: 0 0% 90%;
    --primary-foreground: 0 0% 12%;

    --secondary: 0 0% 17%;
    --secondary-foreground: 0 0% 98%;

    --muted: 0 0% 17%;
    --muted-foreground: 0 0% 64%;

    --accent: 0 0% 27%;
    --accent-foreground: 0 0% 98%;

    --destructive: 0 63% 31%;
    --destructive-foreground: 0 0% 98%;

    --border: 0 0% 20%;
    --input: 0 0% 22%;
    --ring: 0 0% 45%;

    /* Links */
    --link: 217 91% 70%;
    --link-foreground: 217 91% 75%;

    /* Chart colors - shadcn defaults dark */
    --chart-1: 220 70% 50%;
    --chart-2: 160 60% 45%;
    --chart-3: 30 80% 55%;
    --chart-4: 280 65% 60%;
    --chart-5: 340 75% 55%;
}

/* ==================== Base Reset ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Prevent iOS elastic bounce in standalone PWA */
    overscroll-behavior: none;
    overflow: hidden;
    height: 100%;
    position: fixed;
    width: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
    line-height: 1.5;
    height: 100%;
    overflow: hidden;
    position: fixed;
    width: 100%;
    /* Prevent iOS overscroll/bounce */
    overscroll-behavior: none;
}

/* ==================== Layout ==================== */
.container {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    height: 100dvh;
    overflow: hidden;
    position: relative;
    /* Prevent pull-to-refresh and horizontal overscroll */
    overscroll-behavior: none;
    width: 100%;
}

.mobile-only  { display: none; }
.desktop-only { display: inline; }

.separator-vertical {
    width: 1px;
    height: 17px;
    background-color: hsl(var(--input));
    flex-shrink: 0;
}

/* ==================== Sidebar (Collapsible) ==================== */
.sidebar {
    grid-row: 2;
    display: flex;
    flex-direction: column;
    width: 60px;
    background-color: hsl(var(--card));
    border-right: 1px solid hsl(var(--border));
    height: 100%;
    transition: width 0.2s ease;
    overflow: hidden;
}

.sidebar.expanded {
    width: 260px;
}

.sidebar.standalone {
    padding-top: 30px;
}

/* Sidebar branding - mobile only */
.sidebar-branding {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 16px;
    border-bottom: 1px solid hsl(var(--border));
}

.sidebar-logo {
    height: 18px;
    width: auto;
}

.sidebar-logo-dark {
    display: none;
}

[data-theme="dark"] .sidebar-logo-light {
    display: none;
}

[data-theme="dark"] .sidebar-logo-dark {
    display: block;
}

.sidebar-brand-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: hsl(var(--foreground));
}

.sidebar-top {
    display: flex;
    flex-direction: column;
    padding: 12px;
    gap: 8px;
}

.sidebar-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 36px;
    height: 36px;
    padding: 0;
    background-color: transparent;
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar.expanded .sidebar-toggle-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0 12px;
}

.sidebar-toggle-btn:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
}

.sidebar-new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 36px;
    height: 36px;
    padding: 0;
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar.expanded .sidebar-new-chat-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0 12px;
}

.sidebar-new-chat-btn:hover {
    opacity: 0.9;
}

.sidebar-btn-text {
    display: none;
    white-space: nowrap;
    font-size: 0.875rem;
    font-weight: 500;
}

.sidebar.expanded .sidebar-btn-text {
    display: inline;
}

.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.sidebar.expanded .sidebar-content {
    opacity: 1;
}

.sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: hsl(var(--muted-foreground));
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 8px 16px;
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 8px;
}

.chat-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.15s;
    margin-bottom: 2px;
}

.chat-item:hover {
    background-color: hsl(var(--accent));
}

.chat-item.active {
    background-color: hsl(var(--accent));
}

.chat-item-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: hsl(var(--foreground));
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-date {
    font-size: 0.75rem;
    color: hsl(var(--muted-foreground));
}

.sidebar-footer {
    border-top: 1px solid hsl(var(--border));
    display: flex;
    flex-direction: column;
}

.sidebar-footer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 36px;
    height: 36px;
    padding: 0;
    background-color: transparent;
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
    position: relative;
}

.sidebar.expanded .sidebar-footer-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0 12px;
    height: 36px;
}

.sidebar-footer-btn:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
}

/* Theme Toggle Icons */
.theme-icon {
    transition: opacity 0.15s ease;
    flex-shrink: 0;
}

/* Icon-only buttons: stack icons absolutely */
.sidebar-footer-btn .theme-icon,
.mobile-menu-btn .theme-icon {
    position: absolute;
}

/* When expanded, use a fixed-size wrapper for icons */
.sidebar.expanded .sidebar-footer-btn .sun-icon,
.sidebar.expanded .sidebar-footer-btn .moon-icon {
    position: static;
}

/* Hide inactive icon completely in expanded state */
.sidebar.expanded .sidebar-footer-btn .sun-icon {
    display: none;
}

[data-theme="dark"] .sidebar.expanded .sidebar-footer-btn .sun-icon {
    display: block;
}

[data-theme="dark"] .sidebar.expanded .sidebar-footer-btn .moon-icon {
    display: none;
}

/* Light theme: show moon, hide sun */
:root .sun-icon,
[data-theme="light"] .sun-icon {
    opacity: 0;
}

:root .moon-icon,
[data-theme="light"] .moon-icon {
    opacity: 1;
}

/* Dark theme: show sun, hide moon */
[data-theme="dark"] .sun-icon {
    opacity: 1;
}

[data-theme="dark"] .moon-icon {
    opacity: 0;
}

.sidebar-settings {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 12px;
}

.sidebar-user {
    display: flex;
    border-top: 1px solid hsl(var(--border));
    padding: 12px;
    flex-direction: column;
    gap: 8px;
}

.sidebar-user-name {
    display: none;
    font-weight: 600;
    font-size: 0.8125rem;
    color: hsl(var(--foreground));
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-user-email {
    display: none;
    font-size: 0.75rem;
    color: hsl(var(--muted-foreground));
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sign-out-text {
    display: none;
}

.sign-out-icon svg {
    color: hsl(var(--foreground));
}

.sidebar.expanded .sidebar-user-email,
.sidebar.expanded .sidebar-user-name,
.sidebar.expanded .sign-out-text {
    display: block;
}

.sidebar-logout-btn {
    width: 100%;
    height: 36px;
    display: inline-flex;
    justify-content: center;
    padding: 8px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    background-color: transparent;
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
    gap: 6px;
}

.sidebar-logout-btn:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
}

/* Sidebar Overlay - only used on mobile */
.sidebar-overlay {
    display: none;
}

/* ==================== Main Chat Area ==================== */
.chat-container {
    grid-row: 2;
    grid-column: 2;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    background-color: hsl(var(--background));
}

/* ==================== Desktop Header ==================== */
.desktop-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    border-bottom: 1px solid hsl(var(--border));
    background-color: hsl(var(--card));
    z-index: 100;
}

.desktop-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.desktop-header-logo {
    height: 17px;
    width: auto;
}

/* Theme-sensitive logo visibility */
.desktop-header-logo-dark {
    display: none;
}

[data-theme="dark"] .desktop-header-logo-light {
    display: none;
}

[data-theme="dark"] .desktop-header-logo-dark {
    display: block;
}

.desktop-header-title {
    font-size: 1rem;
    font-weight: 600;
    color: hsl(var(--foreground));
}

.header-divider {
    width: 1px;
    height: 16px;
    background-color: hsl(var(--border));
    margin: 0 2px;
}

.desktop-site-name {
    font-size: 0.8125rem;
    font-weight: 400;
    color: hsl(var(--muted-foreground));
}

.desktop-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: hsl(var(--foreground));
    background-color: transparent;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color 0.15s, color 0.15s;
}

.btn-ghost:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
}

.btn-ghost svg {
    display: inline-block;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    stroke: currentColor;
}

.btn-ghost:active {
    background-color: hsl(var(--accent) / 0.8);
}

.alpha-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 6px;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: hsl(var(--primary-foreground));
    background-color: hsl(var(--primary));
    border-radius: 9999px;
}

/* ==================== Messages ==================== */
.messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 0;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}

.messages-inner {
    width: 100%;
    max-width: 48rem;
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
    overflow-x: visible;
}

.welcome-message {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 24px;
    max-width: 640px;
    margin: 0 auto;
}

.welcome-message h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: hsl(var(--foreground));
    margin-bottom: 8px;
}

.welcome-message p {
    font-size: 0.9375rem;
    color: hsl(var(--muted-foreground));
    line-height: 1.6;
    margin-bottom: 24px;
}

/* Suggestion Cards */
.suggestion-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    width: 100%;
}

.suggestion-card {
    display: flex;
    align-items: flex-start;
    text-align: left;
    padding: 14px 16px;
    background-color: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    color: hsl(var(--foreground));
    font-size: 0.875rem;
    line-height: 1.5;
    cursor: pointer;
    transition: all 0.15s;
}

.suggestion-card:hover {
    background-color: hsl(var(--accent));
    border-color: hsl(var(--ring));
}

.suggestion-card:focus-visible {
    outline: 2px solid hsl(var(--ring));
    outline-offset: 2px;
}

@media (max-width: 640px) {
    .suggestion-cards {
        grid-template-columns: 1fr;
    }

    .welcome-message {
        padding: 32px 16px;
    }
}

/* Message layout - conversation style */
.message-wrapper {
    position: relative;
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    width: 100%;
    min-width: 0;
}

.message-wrapper.user {
    justify-content: flex-end;
}

/* Hide avatar for user messages */
.message-wrapper.user .message-avatar {
    display: none;
}

.message-wrapper.assistant {
    /* Assistant messages align left */
    min-width: 0;
}

.message-wrapper.assistant .message {
    min-width: 0;
    flex: 1;
    max-width: 100%;
    overflow-x: auto;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
    object-fit: cover;
}

/* AI Avatar - theme-aware using background-image */
.message-avatar.ai-avatar {
    width: 40px;
    height: 40px;
    background-size: 70%;
    background-position: center;
    background-repeat: no-repeat;
    border-radius: var(--radius);
    position: relative;
}

/* Light theme: charcoal logo on warm background */
:root .message-avatar.ai-avatar,
[data-theme="light"] .message-avatar.ai-avatar {
    background-image: url('img/mxm-avatar-light.svg');
    background-color: #fff7ed;
    border: 1px solid #fed7aa;
}

/* Dark theme: white logo on dark background with orange accent */
[data-theme="dark"] .message-avatar.ai-avatar {
    background-image: url('img/mxm-avatar-dark.svg');
    background-color: #1c1c1c;
    border: 1px solid #ff8700;
}

.message-avatar.user-avatar {
    background-color: hsl(var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: hsl(var(--secondary-foreground));
    font-size: 0.8125rem;
    font-weight: 600;
}

.message {
    padding: 12px 16px;
    border-radius: var(--radius);
    line-height: 1.625;
    font-size: 0.9375rem;
}

.message.user {
    background-color: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border-radius: 16px 16px 4px 16px;
}

.message.assistant {
    background-color: transparent;
    color: hsl(var(--foreground));
    padding: 0;
}

.message.assistant.error {
    padding: 12px 16px;
}

.message.error {
    background-color: hsl(var(--destructive));
    color: hsl(var(--destructive-foreground));
    position: relative;
    padding-right: 42px;
}

.error-action-btn {
    position: absolute;
    width: 24px;
    height: 24px;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    cursor: pointer;
    flex-shrink: 0;
    border: 0;
    padding: 2px;
    border-radius: 6px;
}

.error-action-btn:hover {
    background-color: hsl(var(--accent));
}

.error-action-btn::after {
    content: "";
    display: block;
    width: 18px;
    height: 18px;
    background-color: hsl(var(--destructive-foreground));
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='5' cy='12' r='2'/%3E%3Ccircle cx='12' cy='12' r='2'/%3E%3Ccircle cx='19' cy='12' r='2'/%3E%3C/svg%3E") no-repeat center / contain;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='5' cy='12' r='2'/%3E%3Ccircle cx='12' cy='12' r='2'/%3E%3Ccircle cx='19' cy='12' r='2'/%3E%3C/svg%3E") no-repeat center / contain;
}

.error-popover {
    position: fixed;
    background-color: hsl(var(--popover));
    color: hsl(var(--popover-foreground));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    z-index: 1000;
    overflow: hidden;
}

.error-popover.hidden {
    display: none;
}

.error-popover-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    border: none;
    background: none;
    color: inherit;
    font-size: 0.875rem;
    text-align: left;
    cursor: pointer;
    white-space: nowrap;
}

.error-popover-item:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
}

.error-popover-item svg {
    flex-shrink: 0;
    width: 15px;
    height: 15px;
}

.message.streaming::after {
    content: '';
    display: inline-block;
    width: 2px;
    height: 1em;
    background-color: hsl(var(--foreground));
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ==================== Chat Input Area ==================== */
.chat-form {
    padding: 16px 24px calc(24px + var(--safe-area-inset-bottom));
    padding-left: calc(24px + var(--safe-area-inset-left));
    padding-right: calc(24px + var(--safe-area-inset-right));
    background-color: hsl(var(--background));
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.input-disclaimer {
    font-size: 0.75rem;
    color: hsl(var(--muted-foreground));
    text-align: center;
    margin: 0;
}

.input-wrapper {
    width: 100%;
    max-width: 48rem;
    min-width: 0;
    position: relative;
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 8px;
    min-width: 0;
    background-color: hsl(var(--muted));
    border: 1px solid hsl(var(--border));
    border-radius: calc(var(--radius) * 2);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.input-container:focus-within {
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 1px hsl(var(--ring));
}

#prompt-input {
    flex: 1;
    padding: 8px 12px;
    background-color: transparent;
    border: none;
    color: hsl(var(--foreground));
    font-size: 0.9375rem;
    font-family: inherit;
    line-height: 1.5;
    resize: none;
    max-height: 200px;
    min-height: 24px;
}

#prompt-input::placeholder {
    color: hsl(var(--muted-foreground));
}

#prompt-input:focus {
    outline: none;
}

#prompt-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Action buttons in input */
.input-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-bottom: 4px;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.icon-btn:hover {
    background-color: hsl(var(--border));
    color: hsl(var(--foreground));
}

.icon-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#send-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: opacity 0.15s;
}

#send-btn:hover:not(:disabled) {
    opacity: 0.9;
}

#send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}


/* Feedback buttons */
.chat-feedback-buttons {
    display: none;
}

.feedback-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background-color: transparent;
    color: hsl(var(--muted-foreground));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.feedback-btn:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
}

.feedback-btn.thumbs-up:hover,
.feedback-btn.thumbs-up.active {
    color: hsl(var(--success));
    border-color: hsl(var(--success));
}

.feedback-btn.thumbs-down:hover,
.feedback-btn.thumbs-down.active {
    color: hsl(var(--chart-5));
    border-color: hsl(var(--chart-5));
}

/* Message feedback buttons */
.message-feedback {
    display: flex;
    gap: 2px;
    margin-top: 4px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
}

.message-wrapper:hover .message-feedback {
    opacity: 1;
    pointer-events: auto;
}

/* Hide feedback buttons on messages that are still streaming */
.message.streaming .message-feedback {
    opacity: 0 !important;
    pointer-events: none !important;
}

.message-feedback .feedback-btn {
    width: 20px;
    height: 20px;
    border: none;
    opacity: 0.4;
    transition: opacity 0.15s;
}

.message-feedback .feedback-btn:hover {
    opacity: 1;
}

.message-feedback .feedback-btn svg {
    width: 12px;
    height: 12px;
}

/* ==================== Modals ==================== */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background-color: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    padding: 24px;
    border-radius: calc(var(--radius) * 2);
    width: 100%;
    max-width: 400px;
    margin: 16px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
    max-height: calc(100dvh - 32px - var(--safe-area-inset-top) - var(--safe-area-inset-bottom));
    overflow-y: auto;
    overscroll-behavior: contain;
}

.modal-content h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.modal-content label {
    display: block;
    font-size: 0.875rem;
    color: hsl(var(--muted-foreground));
    margin-bottom: 16px;
}

.modal-content input,
.modal-content textarea {
    width: 100%;
    padding: 10px 12px;
    margin-top: 8px;
    background-color: hsl(var(--muted));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    color: hsl(var(--foreground));
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.15s;
}

.modal-content input:focus,
.modal-content textarea:focus {
    outline: none;
    border-color: hsl(var(--ring));
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 24px;
}

.modal-actions button {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

#save-settings,
.primary-action-btn {
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
}

#save-settings:hover,
.primary-action-btn:hover {
    opacity: 0.9;
}

#close-settings,
#cancel-feedback {
    background-color: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
}

#close-settings:hover,
#cancel-feedback:hover {
    background-color: hsl(var(--accent));
}

/* Feedback Modal */
.feedback-modal-content {
    max-width: 420px;
}

.feedback-context {
    color: hsl(var(--muted-foreground));
    font-size: 0.875rem;
    margin-bottom: 20px;
}

.feedback-thumbs {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 24px;
}

.feedback-thumb-btn {
    background: transparent;
    border: 2px solid hsl(var(--border));
    border-radius: 50%;
    color: hsl(var(--muted-foreground));
    cursor: pointer;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.feedback-thumb-btn:hover {
    background-color: hsl(var(--accent));
    border-color: hsl(var(--muted-foreground));
}

.feedback-thumb-btn.selected[data-thumb="up"] {
    background-color: hsl(var(--success) / 0.15);
    border-color: hsl(var(--success));
    color: hsl(var(--success));
}

.feedback-thumb-btn.selected[data-thumb="down"] {
    background-color: hsl(var(--chart-5) / 0.15);
    border-color: hsl(var(--chart-5));
    color: hsl(var(--chart-5));
}

.feedback-label {
    display: block;
    font-size: 0.875rem;
    color: hsl(var(--muted-foreground));
}

#feedback-comment {
    width: 100%;
    padding: 12px;
    margin-top: 8px;
    background-color: hsl(var(--muted));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    color: hsl(var(--foreground));
    font-family: inherit;
    font-size: 0.875rem;
    resize: vertical;
    min-height: 80px;
}

#feedback-comment:focus {
    outline: none;
    border-color: hsl(var(--ring));
}

/* ==================== Login Screen ==================== */
.login-screen {
    position: fixed;
    inset: 0;
    background-color: hsl(var(--background));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.login-theme-toggle {
    position: absolute;
    top: calc(16px + var(--safe-area-inset-top));
    right: calc(16px + var(--safe-area-inset-right));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background-color: transparent;
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
    color: hsl(var(--muted-foreground));
}

.login-theme-toggle:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
}

.login-theme-toggle .theme-icon {
    position: absolute;
    transition: opacity 0.2s, transform 0.3s;
}

.login-screen.hidden {
    display: none;
}

.login-container {
    width: 100%;
    max-width: 350px;
    text-align: center;
    padding: 0 24px;
    padding-left: calc(24px + var(--safe-area-inset-left));
    padding-right: calc(24px + var(--safe-area-inset-right));
    box-sizing: border-box;
}

.login-logo {
    height: 28px;
    margin-bottom: 48px;
}

.login-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 24px;
}

.login-logo-light {
    display: block;
    margin: 0 auto;
}

.login-logo-dark {
    display: none;
    margin: 0 auto;
}

[data-theme="dark"] .login-logo-light {
    display: none;
}

[data-theme="dark"] .login-logo-dark {
    display: block;
}

.login-container h1 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    margin: 0;
    color: hsl(var(--foreground));
}

.login-form {
    text-align: left;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: hsl(var(--foreground));
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    background-color: transparent;
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    color: hsl(var(--foreground));
    font-size: 1rem;
    transition: border-color 0.15s, box-shadow 0.15s;
    box-sizing: border-box;
    -webkit-appearance: none;
}

.form-group input:focus {
    outline: none;
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 2px hsl(var(--ring) / 0.2);
}

.form-group input::placeholder {
    color: hsl(var(--muted-foreground));
}

.login-error {
    background-color: hsl(var(--destructive) / 0.1);
    color: hsl(var(--muted-foreground) / 0.8 );
    border: 1px solid hsl(var(--destructive) / 0.2);
    padding: 12px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 0.875rem;
    text-align: left;
}

.login-error.hidden {
    display: none;
}

.request-access-btn {
    background-color: transparent;
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--border));
    margin-bottom: 16px;
}

.request-access-btn.hidden {
    display: none;
}

.request-access-status {
    color: hsl(var(--muted-foreground));
    font-size: 0.875rem;
    text-align: left;
    margin-bottom: 16px;
}

.request-access-status.hidden {
    display: none;
}

.app-error {
    background-color: hsl(var(--destructive) / 0.1);
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--destructive) / 0.2);
    padding: 12px 16px;
    border-radius: var(--radius);
    margin: 12px 16px;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.app-error.hidden {
    display: none;
}

.app-error-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    padding: 0 4px;
}

.login-btn {
    width: 100%;
    height: 44px;
    padding: 0 16px;
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.15s;
    margin-top: 8px;
    -webkit-appearance: none;
}

.login-btn:hover:not(:disabled) {
    background-color: hsl(var(--primary) / 0.9);
}

.login-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== Scrollbar ==================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: hsl(var(--border));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: hsl(var(--muted-foreground) / 0.5);
}

/* ==================== Toast ==================== */
.feedback-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background-color: hsl(var(--foreground));
    color: hsl(var(--background));
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 300;
    animation: toast-slide 2.5s ease-in-out;
}

@keyframes toast-slide {
    0% { opacity: 0; transform: translateX(-50%) translateY(16px); }
    15% { opacity: 1; transform: translateX(-50%) translateY(0); }
    85% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-8px); }
}

/* ==================== Markdown Content ==================== */

/* Ensure all text inherits foreground color by default */
.message.assistant * {
    color: inherit;
}

.message.assistant p {
    margin: 0 0 12px 0;
    color: hsl(var(--foreground));
}

.message.assistant p:last-child {
    margin-bottom: 0;
}

.message.assistant code {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
    padding: 2px 6px;
    border-radius: calc(var(--radius) / 2);
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.875em;
}

.message.assistant pre {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 16px 0;
}

.message.assistant pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    font-size: 0.8125rem;
    line-height: 1.6;
}

.message.assistant ul,
.message.assistant ol {
    margin: 12px 0;
    padding-left: 24px;
    color: hsl(var(--foreground));
}

.message.assistant li {
    margin: 6px 0;
    color: hsl(var(--foreground));
}

.message.assistant h1,
.message.assistant h2,
.message.assistant h3,
.message.assistant h4 {
    margin: 20px 0 12px 0;
    font-weight: 600;
    line-height: 1.3;
    color: hsl(var(--foreground));
}

.message.assistant h1 { font-size: 1.375em; }
.message.assistant h2 { font-size: 1.25em; }
.message.assistant h3 { font-size: 1.125em; }
.message.assistant h4 { font-size: 1em; }

.message.assistant strong,
.message.assistant b {
    font-weight: 600;
    color: hsl(var(--foreground));
}

.message.assistant em,
.message.assistant i {
    font-style: italic;
    color: inherit;
}

.message.assistant del,
.message.assistant s {
    text-decoration: line-through;
    color: hsl(var(--muted-foreground));
}

.message.assistant mark {
    background-color: hsl(var(--warning) / 0.3);
    color: hsl(var(--foreground));
    padding: 1px 4px;
    border-radius: 2px;
}

.message.assistant sub,
.message.assistant sup {
    font-size: 0.75em;
    color: inherit;
}

.message.assistant abbr {
    text-decoration: underline dotted;
    color: inherit;
    cursor: help;
}

.message.assistant kbd {
    display: inline-block;
    padding: 2px 6px;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.8em;
    color: hsl(var(--foreground));
    background-color: hsl(var(--muted));
    border: 1px solid hsl(var(--border));
    border-radius: calc(var(--radius) / 2);
    box-shadow: inset 0 -1px 0 hsl(var(--border));
}

.message.assistant blockquote {
    border-left: 3px solid hsl(var(--border));
    margin: 16px 0;
    padding-left: 16px;
    color: hsl(var(--muted-foreground));
}

.message.assistant a {
    color: hsl(var(--link));
    text-decoration: none;
}

.message.assistant a:hover {
    color: hsl(var(--link-foreground));
    text-decoration: underline;
}

.message.assistant a.link-button {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    background-color: hsl(var(--background));
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.15s;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.message.assistant a.link-button span {
    white-space: nowrap;
}

.message.assistant a.link-button:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
    text-decoration: none;
}

.message.assistant a.link-button svg {
    flex-shrink: 0;
}

/* Wrapper for horizontal scroll on tables */
.message.assistant .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 16px 0;
    max-width: 100%;
    /* Ensure touch scrolling works on the table itself */
    touch-action: pan-x pan-y;
}

.message.assistant table {
    border-collapse: collapse;
    width: max-content;
    min-width: 100%;
    font-size: 0.875em;
    color: hsl(var(--foreground));
}

.message.assistant th,
.message.assistant td {
    border: 1px solid hsl(var(--border));
    padding: 10px 12px;
    text-align: left;
    color: hsl(var(--foreground));
}

.message.assistant th {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
    font-weight: 600;
}

.message.assistant hr {
    border: none;
    border-top: 1px solid hsl(var(--border));
    margin: 20px 0;
}

/* Mermaid diagrams */
.message.assistant .mermaid {
    background-color: hsl(var(--accent));
    padding: 16px;
    border-radius: var(--radius);
    margin: 16px 0;
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
}

.message.assistant .mermaid svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Prevent message bubbles from expanding beyond container due to wide content */
.message {
    min-width: 0;
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.message.assistant {
    overflow: visible;
    max-width: 100%;
}

/* Override Mermaid SVG text colors for theme compatibility */
.message.assistant .mermaid text,
.message.assistant .mermaid .nodeLabel,
.message.assistant .mermaid .edgeLabel,
.message.assistant .mermaid .label,
.message.assistant .mermaid .cluster-label,
.message.assistant .mermaid .actor,
.message.assistant .mermaid .messageText,
.message.assistant .mermaid .loopText,
.message.assistant .mermaid .noteText,
.message.assistant .mermaid .labelText,
.message.assistant .mermaid .sectionTitle,
.message.assistant .mermaid .taskText,
.message.assistant .mermaid .taskTextOutsideRight,
.message.assistant .mermaid .taskTextOutsideLeft,
.message.assistant .mermaid .titleText,
.message.assistant .mermaid tspan {
    fill: hsl(var(--foreground)) !important;
    color: hsl(var(--foreground)) !important;
}

/* Mermaid node backgrounds */
.message.assistant .mermaid .node rect,
.message.assistant .mermaid .node circle,
.message.assistant .mermaid .node ellipse,
.message.assistant .mermaid .node polygon,
.message.assistant .mermaid .node path {
    fill: hsl(var(--muted)) !important;
    stroke: hsl(var(--border)) !important;
}

/* Mermaid edge/line colors */
.message.assistant .mermaid .edgePath path,
.message.assistant .mermaid .flowchart-link,
.message.assistant .mermaid line {
    stroke: hsl(var(--muted-foreground)) !important;
}

/* Mermaid arrowheads */
.message.assistant .mermaid marker path {
    fill: hsl(var(--muted-foreground)) !important;
    stroke: hsl(var(--muted-foreground)) !important;
}

/* Mermaid cluster/subgraph backgrounds */
.message.assistant .mermaid .cluster rect {
    fill: hsl(var(--accent)) !important;
    stroke: hsl(var(--border)) !important;
}

.message.assistant .mermaid-error {
    color: hsl(var(--destructive-foreground));
    background-color: hsl(var(--destructive) / 0.15);
    border: 1px solid hsl(var(--destructive) / 0.3);
    padding: 12px;
    border-radius: var(--radius);
}

/* KaTeX math */
.message.assistant .katex-display {
    margin: 16px 0;
    overflow-x: auto;
    overflow-y: hidden;
    color: hsl(var(--foreground));
}

.message.assistant .katex {
    font-size: 1.1em;
    color: hsl(var(--foreground));
}

/* Override KaTeX default black text colors */
.message.assistant .katex .mord,
.message.assistant .katex .mopen,
.message.assistant .katex .mclose,
.message.assistant .katex .mpunct,
.message.assistant .katex .mrel,
.message.assistant .katex .mbin,
.message.assistant .katex .minner,
.message.assistant .katex .mop,
.message.assistant .katex .katex-mathml,
.message.assistant .katex .base {
    color: hsl(var(--foreground));
}

/* KaTeX fraction lines and rules */
.message.assistant .katex .frac-line,
.message.assistant .katex .overline-line,
.message.assistant .katex .underline-line,
.message.assistant .katex .hline,
.message.assistant .katex .rule {
    border-color: hsl(var(--foreground));
    background-color: hsl(var(--foreground));
}

/* KaTeX sqrt symbol */
.message.assistant .katex .sqrt > .root {
    color: hsl(var(--foreground));
}

.message.assistant .katex .sqrt-sign {
    color: hsl(var(--foreground));
}

/* KaTeX delimiters (brackets, parens) */
.message.assistant .katex .delimsizing,
.message.assistant .katex .delimsizinginner {
    color: hsl(var(--foreground));
}

/* KaTeX accents */
.message.assistant .katex .accent > .vlist-t {
    color: hsl(var(--foreground));
}

/* KaTeX SVG elements (used for stretchy symbols, sqrt, etc.) */
.message.assistant .katex svg,
.message.assistant .katex svg path,
.message.assistant .katex svg line,
.message.assistant .katex svg rect {
    fill: hsl(var(--foreground));
    stroke: hsl(var(--foreground));
}

/* KaTeX hide-tail class (used in some constructs) */
.message.assistant .katex .hide-tail svg {
    fill: hsl(var(--muted));
}

/* Ensure KaTeX HTML mode also uses correct colors */
.message.assistant .katex-html {
    color: hsl(var(--foreground));
}

/* ==================== Streaming/Loading State ==================== */
.message-loading {
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-loading .spinner {
    width: 16px;
    height: 16px;
    border: 2px solid hsl(var(--ring));
    border-top-color: transparent;
    border-radius: 50%;
    animation: spinner-ring 1s linear infinite;
}

@keyframes spinner-ring {
    to {
        transform: rotate(360deg);
    }
}

.message-loading .loading-text {
    color: hsl(var(--muted-foreground));
    font-size: 0.9375rem;
}

/* Hide streaming cursor when in loading state */
.message.assistant.loading::after {
    display: none;
}

/* ==================== Tool Indicators ==================== */
.tool-indicator {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 0 5px;
    border-radius: 999px;
    font-size: 0.625rem;
    margin: 0;
    line-height: 1.1;
    height: 18px;
}

.tool-indicator.tool-running {
    background: hsl(var(--chart-1) / 0.1);
    color: hsl(var(--chart-1));
}

.tool-indicator.tool-pending {
    background: hsl(var(--muted));
    color: hsl(var(--muted-foreground));
}

.tool-indicator.tool-success {
    background: hsl(var(--success) / 0.1);
    color: hsl(var(--success));
}

.tool-indicator.tool-error {
    background: hsl(var(--chart-5) / 0.1);
    color: hsl(var(--chart-5));
}

.tool-indicator .spinner {
    display: inline-block;
    width: 8px;
    height: 8px;
    border: 1px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.tool-indicator .tool-name {
    font-weight: 500;
    letter-spacing: -0.01em;
}

.tool-indicator .tool-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.5625rem;
}

.tool-indicator .tool-icon:empty {
    display: none;
}

.tool-group {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    padding-left: 0;
}

/* ==================== Streaming Progress ==================== */
.streaming-progress-content {
    max-height: 3em;
    overflow: hidden;
    font-size: 0.8125rem;
    color: hsl(var(--muted-foreground));
    min-width: 0;
    margin-top: 6px;
}

.streaming-progress-content .progress-line {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5;
}

.streaming-progress-content .progress-line:nth-child(1) {
    opacity: 0.35;
}

.streaming-progress-content .progress-line:nth-child(2) {
    opacity: 0.65;
}

/* ==================== Feedback Reasons ==================== */
.feedback-reasons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0;
}

.reason-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.8125rem;
    border: 1px solid hsl(var(--border));
    background: transparent;
    color: hsl(var(--foreground));
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s;
}

.reason-pill:hover {
    background: hsl(var(--accent));
}

.reason-pill.selected {
    background: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border-color: hsl(var(--primary));
}

/* ==================== Settings Modal ==================== */
.settings-modal-content {
    min-width: 320px;
}

.settings-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: hsl(var(--foreground));
    margin-bottom: 16px;
}

.settings-select {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 8px 12px;
    border-radius: var(--radius);
    border: 1px solid hsl(var(--input));
    background: hsl(var(--background));
    color: hsl(var(--foreground));
    font-size: 0.875rem;
}

/* ==================== Message Grouping ==================== */
.message-wrapper.grouped {
    margin-top: 0;
}

.message-wrapper.tool-message {
    margin-right: auto;
    margin-bottom: 4px;
}

/* Remove bottom gap on wrapper that precedes a grouped sibling */
.message-wrapper:has(+ .message-wrapper.grouped) {
    margin-bottom: 4px;
}

.message-avatar.invisible {
    visibility: hidden;
}

/* ==================== Mobile Header Logo ==================== */
.mobile-header-logo {
    display: none;
    width: 24px;
    height: 24px;
}

/* ==================== Voice Recording ==================== */
#voice-btn .voice-icon {
    width: 18px;
    height: 18px;
}

/* Voice container - replaces input when recording */
.voice-container {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 8px;
    background-color: hsl(var(--muted));
    border: 2px solid hsl(var(--chart-5));
    border-radius: calc(var(--radius) * 2);
    animation: border-pulse 1.5s ease-in-out infinite;
}

.voice-container.hidden {
    display: none;
}

/* Hide input container when voice is recording */
.voice-container:not(.hidden) + .input-container,
.input-wrapper:has(.voice-container:not(.hidden)) .input-container {
    display: none;
}

@keyframes border-pulse {
    0%, 100% { border-color: hsl(var(--chart-5)); }
    50% { border-color: hsl(var(--chart-5) / 0.7); }
}

.voice-inline {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 4px 8px;
}

.voice-inline-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.voice-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.voice-pulse {
    width: 10px;
    height: 10px;
    background: hsl(var(--chart-5));
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

#voice-status-text {
    font-size: 0.875rem;
    color: hsl(var(--foreground));
    font-weight: 500;
}

.voice-timer {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.875rem;
    color: hsl(var(--chart-5));
    font-weight: 500;
}

.voice-level-container {
    width: 100%;
    height: 4px;
    background: hsl(var(--accent));
    border-radius: 2px;
    overflow: hidden;
}

.voice-level-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, hsl(var(--chart-5)), hsl(var(--chart-5) / 0.7));
    border-radius: 2px;
    transition: width 0.2s ease-out;
}

.voice-inline-transcript {
    min-height: 24px;
    max-height: 80px;
    overflow-y: auto;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: hsl(var(--foreground));
}

.voice-transcript-placeholder {
    color: hsl(var(--muted-foreground));
    font-style: italic;
}

.voice-inline-transcript .voice-final {
    color: hsl(var(--foreground));
}

.voice-inline-transcript .voice-partial {
    color: hsl(var(--muted-foreground));
    font-style: italic;
}

.voice-inline-transcript .voice-error {
    color: hsl(var(--chart-5));
}

/* Voice action buttons */
.voice-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    padding-bottom: 4px;
}

.voice-cancel-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background-color: transparent;
    color: hsl(var(--muted-foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.voice-cancel-btn:hover {
    background-color: hsl(var(--chart-5) / 0.2);
    color: hsl(var(--chart-5));
}

.voice-send-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background-color: hsl(var(--chart-5));
    color: hsl(var(--primary-foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.voice-send-btn:hover {
    background-color: hsl(var(--chart-5) / 0.85);
}

.voice-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}


/* ==================== Mobile Responsive ==================== */

/* Mobile header bar - only visible on small screens */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: calc(56px + var(--safe-area-inset-top));
    padding-top: var(--safe-area-inset-top);
    background-color: hsl(var(--card));
    border-bottom: 1px solid hsl(var(--border));
    z-index: 30;
    padding-left: calc(12px + var(--safe-area-inset-left));
    padding-right: calc(12px + var(--safe-area-inset-right));
    align-items: center;
    justify-content: space-between;
}

.mobile-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mobile-header-center {
    display: flex;
    align-items: center;
    gap: 6px;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.mobile-header-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: hsl(var(--foreground));
}

.mobile-header-divider {
    color: hsl(var(--muted-foreground));
    margin: 0 2px;
}

.mobile-site-name {
    font-size: 0.8125rem;
    font-weight: 400;
    color: hsl(var(--muted-foreground));
}

.mobile-header-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background-color: transparent;
    color: hsl(var(--foreground));
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.mobile-menu-btn:hover {
    background-color: hsl(var(--accent));
}

.mobile-logo {
    height: 32px;
    width: auto;
}

@media (max-width: 768px) {

    .mobile-only  { display: inline; }
    .desktop-only { display: none; }

    .mobile-header {
        display: flex;
    }

    .mobile-header-logo {
        display: block;
    }

    .desktop-header {
        display: none;
    }

    .container {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        width: 280px;
        height: 100dvh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
    }

    .sidebar.expanded {
        transform: translateX(0);
        width: 280px;
    }

    .sidebar-branding {
        display: flex;
    }

    .sidebar-toggle-btn {
        display: none;
    }

    .sidebar-content {
        opacity: 1;
    }

    .sidebar-btn-text {
        display: inline;
    }

    .sidebar-new-chat-btn {
        width: 100%;
        justify-content: flex-start;
        padding: 0 12px;
    }

    .sidebar-footer-btn {
        width: 100%;
        justify-content: flex-start;
        padding: 0 12px;
    }

    .sidebar-user {
        display: flex;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .chat-container {
        grid-row: 1;
        grid-column: 1;
        margin-left: 0;
        width: 100%;
        padding-top: 56px;
        height: 100%;
    }

    .messages {
        padding: 16px;
    }

    .message-wrapper {
        max-width: 100%;
    }

    .chat-form {
        padding: 12px 16px 20px;
    }

    .input-wrapper {
        max-width: 100%;
    }

    /* Prevent iOS zoom on input focus (requires >= 16px) */
    #prompt-input {
        font-size: 1rem;
    }

    .modal-content {
        padding: 20px;
        margin: 12px;
        max-width: calc(100% - 24px);
        border-radius: var(--radius);
    }

    .feedback-modal-content {
        max-width: calc(100% - 24px);
    }

    .modal-actions {
        flex-direction: column-reverse;
        gap: 8px;
    }

    .modal-actions button {
        width: 100%;
        padding: 12px 16px;
    }

    .login-container {
        padding: 0 16px;
        max-width: 100%;
    }

    .login-container h1 {
        font-size: 1.25rem;
    }
}

/* Mobile floating voice button */
.mobile-voice-fab {
    display: none;
    position: fixed;
    bottom: calc(var(--chat-form-height, 100px) + var(--safe-area-inset-bottom) + 12px);
    right: calc(20px + var(--safe-area-inset-right));
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: hsl(var(--background));
    color: hsl(var(--muted-foreground));
    border: 1px solid hsl(var(--border));
    cursor: pointer;
    z-index: 25;
    box-shadow: 0 2px 8px hsl(var(--foreground) / 0.08);
    transition: all 0.2s;
    align-items: center;
    justify-content: center;
}

/* Dark mode: primary color FAB for visibility */
[data-theme="dark"] .mobile-voice-fab {
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: none;
    box-shadow: 0 4px 14px hsl(var(--primary) / 0.4);
}

.mobile-voice-fab:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 16px hsl(var(--foreground) / 0.15);
    color: hsl(var(--foreground));
}

[data-theme="dark"] .mobile-voice-fab:hover {
    box-shadow: 0 6px 20px hsl(var(--primary) / 0.5);
    color: hsl(var(--primary-foreground));
}

.mobile-voice-fab:active {
    transform: scale(0.95);
}

.mobile-voice-fab.recording {
    background-color: hsl(var(--chart-5));
    animation: fab-pulse 1.5s ease-in-out infinite;
}

@keyframes fab-pulse {
    0%, 100% { box-shadow: 0 4px 12px hsl(var(--chart-5) / 0.4); }
    50% { box-shadow: 0 4px 24px hsl(var(--chart-5) / 0.6); }
}

/* Hide FAB when voice inline UI or the install banner is active */
.voice-container:not(.hidden) ~ .mobile-voice-fab,
.install-banner:not(.hidden) ~ .mobile-voice-fab,
.mobile-voice-fab.hidden {
    display: none !important;
}

/* Small mobile adjustments */
@media (max-width: 640px) {
    .chat-container {
        max-width: 100vw;
        overflow-x: hidden;
    }

    .sidebar.expanded {
        width: 280px;
    }

    .messages {
        padding: 12px 16px;
    }

    .messages-inner {
        max-width: 100%;
    }

    .message {
        font-size: 0.875rem;
        padding: 10px 14px;
    }

    .message-wrapper {
        max-width: 100%;
    }

    .message.assistant a.link-button {
        max-width: calc(100vw - 100px);
    }

    .chat-form {
        padding: 10px 16px 16px;
    }

    .input-wrapper {
        max-width: 100%;
    }

    .message-avatar {
        width: 28px;
        height: 28px;
    }

    .welcome-message h2 {
        font-size: 1.25rem;
    }

    /* Improve table display on mobile */
    .message.assistant .table-wrapper {
        overflow-x: scroll;
        max-width: calc(100vw - 72px);
        -webkit-overflow-scrolling: touch;
    }

    .message.assistant table {
        font-size: 0.75rem;
    }

    .message.assistant th,
    .message.assistant td {
        padding: 6px 8px;
    }

    /* Show floating voice button on mobile */
    .mobile-voice-fab {
        display: flex;
    }

    /* Hide the inline voice button on mobile */
    #voice-btn {
        display: none;
    }
}

/* Extra small screens - hide avatar for more content space */
@media (max-width: 390px) {
    .message-avatar.ai-avatar {
        display: none;
    }

    .message-wrapper.assistant {
        gap: 0;
    }

    .message.assistant .table-wrapper {
        max-width: calc(100vw - 32px);
    }
}

/* ==================== Landscape Mobile Avatar Popover ==================== */

.landscape-avatar-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background-color: transparent;
    color: hsl(var(--foreground));
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.landscape-avatar-btn:hover,
.landscape-avatar-btn[aria-expanded="true"] {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
}

.landscape-user-popover {
    position: fixed;
    /* bottom is set by JS to escape overflow: hidden on .sidebar */
    left: 12px;
    width: 220px;
    background-color: hsl(var(--background));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    box-shadow: 0 -4px 16px hsl(var(--muted) / 0.2);
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    z-index: 200;
}

.landscape-user-popover[hidden] {
    display: none;
}

.landscape-popover-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 10px;
    background: transparent;
    color: hsl(var(--foreground));
    border: none;
    border-radius: calc(var(--radius) - 2px);
    cursor: pointer;
    font-size: 0.875rem;
    text-align: left;
    transition: background-color 0.15s;
}

.landscape-popover-btn:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--accent-foreground));
}

/* Light: show moon (switch-to-dark icon), remove sun from flow */
.landscape-popover-btn .sun-icon { display: none; }
.landscape-popover-btn .moon-icon { display: block; opacity: 1; }

/* Dark: show sun (switch-to-light icon), remove moon from flow */
[data-theme="dark"] .landscape-popover-btn .sun-icon { display: block; opacity: 1; }
[data-theme="dark"] .landscape-popover-btn .moon-icon { display: none; }

.landscape-popover-divider {
    height: 1px;
    background-color: hsl(var(--border));
    margin: 4px 0;
}

.landscape-popover-user {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 6px 10px 4px;
}

.landscape-popover-user-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: hsl(var(--foreground));
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.landscape-popover-user-email {
    font-size: 0.75rem;
    color: hsl(var(--muted-foreground));
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 4px;
}

.landscape-popover-logout {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    background-color: transparent;
    color: hsl(var(--muted-foreground));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.landscape-popover-logout:hover {
    background-color: hsl(var(--accent));
    color: hsl(var(--foreground));
}

@media (orientation: landscape) and (max-height: 520px) {
    .sidebar-footer {
        position: relative;
    }

    .sidebar-footer .sidebar-footer-btn,
    .sidebar-footer .sidebar-user,
    .sidebar-footer .sidebar-settings {
        display: none !important;
    }

    .sidebar-footer {
        padding: 12px;
        justify-content: center;
    }

    .landscape-avatar-btn {
        display: flex;
    }
}

/* ==================== ShadCN Tooltip ==================== */
.tooltip {
    position: fixed;
    z-index: 1000;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
    color: hsl(var(--primary-foreground));
    background-color: hsl(var(--primary));
    border-radius: calc(var(--radius) - 2px);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease, transform 0.15s ease;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tooltip.visible {
    opacity: 1;
    transform: translate(0, 0);
}

.tooltip::after {
    content: '';
    position: absolute;
    border: 4px solid transparent;
}

/* Tooltip below element - arrow at top pointing up */
.tooltip.tooltip-bottom {
    transform: translateY(-4px);
}

.tooltip.tooltip-bottom::after {
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-bottom-color: hsl(var(--primary));
}

/* Tooltip above element - arrow at bottom pointing down */
.tooltip.tooltip-top {
    transform: translateY(4px);
}

.tooltip.tooltip-top::after {
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-top-color: hsl(var(--primary));
}

/* Tooltip left of element - arrow at right pointing right */
.tooltip.tooltip-left {
    transform: translateX(4px);
}

.tooltip.tooltip-left::after {
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border-left-color: hsl(var(--primary));
}

/* Tooltip right of element - arrow at left pointing left */
.tooltip.tooltip-right {
    transform: translateX(-4px);
}

.tooltip.tooltip-right::after {
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    border-right-color: hsl(var(--primary));
}

/* ==================== Install Banner ==================== */
.install-banner {
    align-self: center;
    flex-shrink: 0;
    width: calc(100% - 32px);
    max-width: 600px;
    margin-bottom: 4px;
    background-color: hsl(var(--card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    padding: 12px 16px;
    box-shadow: 0 4px 16px hsl(var(--foreground) / 0.1);
    animation: install-banner-in 0.3s ease-out;
}

@keyframes install-banner-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.install-banner-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.install-banner-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    flex-shrink: 0;
}

.install-banner-text {
    flex: 1;
    min-width: 0;
}

.install-banner-text strong {
    display: block;
    color: hsl(var(--foreground));
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.install-banner-text span {
    color: hsl(var(--muted-foreground));
    font-size: 0.8rem;
    line-height: 1.3;
}

.install-banner-btn {
    background-color: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    border: none;
    border-radius: var(--radius);
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.install-banner-btn:hover {
    opacity: 0.9;
}

.install-banner-close {
    background: none;
    border: none;
    color: hsl(var(--muted-foreground));
    font-size: 1.4rem;
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
    transition: color 0.2s;
}

.install-banner-close:hover {
    color: hsl(var(--foreground));
}

/* ==================== Utility ==================== */
.hidden {
    display: none !important;
}

/* ==================== End-of-Trial Screen ==================== */
.trial-ended-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: hsl(var(--foreground));
    margin: 24px 0 12px;
}

.trial-ended-message {
    color: hsl(var(--muted-foreground));
    font-size: 0.9375rem;
    margin-bottom: 24px;
    text-align: left;
}

#trial-feedback-input {
    width: 100%;
    padding: 10px 12px;
    background-color: transparent;
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    color: hsl(var(--foreground));
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    box-sizing: border-box;
}

#trial-feedback-input:focus {
    outline: none;
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 2px hsl(var(--ring) / 0.2);
}