/**
 * Evenly Dialog v2 - End-User Conversation UI
 * Configurable light/dark/auto theme with white-label support
 * WCAG 2.2 AAA compliant, mobile-first responsive design
 */

/* ===========================================
   CSS RESET & BOX MODEL
   =========================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===========================================
   CSS CUSTOM PROPERTIES — LIGHT THEME (DEFAULT)
   =========================================== */
:root {
    /* Font scale for user preference (1 = 100%, 1.25 = 125%, etc.) */
    --font-scale: 1;

    /* Colors - Light Theme (WCAG 2.2 AAA Compliant)
       All text colors achieve 7:1 contrast ratio against backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;

    --text-primary: #0f172a;       /* ~15.8:1 on bg-primary AAA */
    --text-secondary: #475569;     /* ~7.5:1 on bg-primary AAA */
    --text-muted: #475569;         /* ~7.0:1 on bg-primary AAA */

    --accent-primary: #1d4ed8;     /* Blue — darkened for AAA 7:1 white text contrast. Overridden by whiteLabel.primaryColor */
    --accent-primary-hover: #1e40af;
    --accent-primary-active: #1a3a9e;
    --accent-text: #ffffff;         /* Text on accent-primary — auto-computed for AAA contrast by JS */

    --border-color: #8896a7;
    --border-color-light: #8896a7;

    /* Status colors */
    --status-connected: #16a34a;
    --status-connecting: #ca8a04;
    --status-disconnected: #64748b;
    --status-error: #dc2626;
    --status-listening: #2563eb;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

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

/* ===========================================
   DARK THEME (via .theme-dark class)
   =========================================== */
.theme-dark {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;

    --text-primary: #f8fafc;       /* ~15.8:1 on bg-primary AAA */
    --text-secondary: #b8c5d3;     /* ~8.5:1 on bg-primary AAA */
    --text-muted: #9ca8b8;         /* ~7.2:1 on bg-primary AAA */

    --accent-primary: #1d4ed8;     /* Darkened for AAA 7:1 white text contrast */
    --accent-primary-hover: #2563eb;
    --accent-primary-active: #1a3a9e;
    --accent-text: #ffffff;

    --border-color: #334155;
    --border-color-light: #475569;

    --status-connected: #22c55e;
    --status-connecting: #eab308;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

/* Auto theme — matches system preference */
@media (prefers-color-scheme: dark) {
    .theme-auto {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;

        --text-primary: #f8fafc;
        --text-secondary: #b8c5d3;
        --text-muted: #9ca8b8;

        --accent-primary: #3b82f6;
        --accent-primary-hover: #60a5fa;
        --accent-primary-active: #2563eb;

        --border-color: #334155;
        --border-color-light: #475569;

        --status-connected: #22c55e;
        --status-connecting: #eab308;

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    }
}

/* ===========================================
   ACCESSIBILITY - REDUCED MOTION
   =========================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===========================================
   ACCESSIBILITY - SCREEN READER ONLY
   =========================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -9999px;
    left: -9999px;
    background: var(--accent-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 1000;
}

.skip-link:focus {
    top: var(--safe-area-top, 0);
    left: 0;
}

/* ===========================================
   BASE STYLES
   =========================================== */
html {
    font-size: calc(16px * var(--font-scale));
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================================
   MAIN CONTAINER
   =========================================== */
.conversation-container {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    max-width: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + var(--safe-area-top));
    padding-bottom: calc(var(--spacing-md) + var(--safe-area-bottom));
    padding-left: calc(var(--spacing-md) + var(--safe-area-left));
    padding-right: calc(var(--spacing-md) + var(--safe-area-right));
}

/* ===========================================
   HEADER
   =========================================== */
.conversation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-sm);
    flex-shrink: 0;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    flex-shrink: 0;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* Widget close button — visible only in widget-embed mode on mobile */
.widget-close-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: none;
    border-radius: 8px;
    background: none;
    color: var(--text-secondary, #64748b);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.widget-close-btn:hover {
    background: var(--bg-hover, rgba(0, 0, 0, 0.06));
    color: var(--text-primary, #1e293b);
}

.widget-close-btn:focus-visible {
    outline: 2px solid var(--accent, #2563eb);
    outline-offset: 2px;
}

/* Show close button when parent widget signals mobile full-screen mode */
body.widget-mobile .widget-close-btn {
    display: flex;
}

/* ===========================================
   FONT SIZE SELECTOR
   =========================================== */
.font-size-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    position: relative;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.font-size-selector:hover,
.font-size-selector:focus {
    background: var(--bg-tertiary);
    border-color: var(--border-color-light);
    outline: none;
}

.font-size-selector:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.font-size-icon {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.05em;
}

.font-size-selector .dropdown-arrow {
    color: var(--text-secondary);
    transition: transform var(--transition-fast);
}

.font-size-selector[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

/* Font Size Menu Dropdown */
.font-size-menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    min-width: 140px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    list-style: none;
    display: none;
    overflow: hidden;
}

.font-size-selector[aria-expanded="true"] .font-size-menu {
    display: block;
}

.font-size-menu li {
    padding: var(--spacing-md) var(--spacing-md);
    min-height: 44px;
    display: flex;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.font-size-menu li:hover,
.font-size-menu li:focus {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    outline: none;
}

.font-size-menu li:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: -2px;
}

.font-size-menu li[aria-selected="true"] {
    color: var(--accent-primary);
    font-weight: 500;
}

.font-size-menu li[aria-selected="true"]::before {
    content: '\2713';
    margin-right: var(--spacing-sm);
}

/* ===========================================
   LANGUAGE SELECTOR
   =========================================== */
.language-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 44px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    position: relative;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.language-selector:hover,
.language-selector:focus {
    background: var(--bg-tertiary);
    border-color: var(--border-color-light);
    outline: none;
}

.language-selector:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.language-code {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.dropdown-arrow {
    color: var(--text-secondary);
    transition: transform var(--transition-fast);
}

.language-selector[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

/* Language Menu Dropdown */
.language-menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    min-width: 200px;
    max-height: 300px;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    list-style: none;
    display: none;
}

.language-selector[aria-expanded="true"] .language-menu {
    display: block;
}

.language-menu li {
    padding: var(--spacing-md) var(--spacing-md);
    min-height: 44px;
    display: flex;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.language-menu li:hover,
.language-menu li:focus {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    outline: none;
}

.language-menu li:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: -2px;
}

.language-menu li[aria-selected="true"] {
    color: var(--accent-primary);
    font-weight: 500;
}

/* ===========================================
   PROJECT INFO SECTION
   =========================================== */
.project-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: 3px;
    flex-shrink: 0;
}

.project-details {
    flex: 1;
}

.project-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.project-meta {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* Info Button - WCAG 2.2 AAA: 44x44px minimum target size */
.info-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.info-btn:hover,
.info-btn:focus {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    outline: none;
}

.info-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

/* ===========================================
   MAIN CONTENT AREA
   =========================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 3px 0;
    min-height: 0;
    overflow: hidden;
}

/* Empty State */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.empty-state[hidden],
.chat-pane[hidden] {
    display: none !important;
}

.empty-state-icon {
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.empty-state-icon svg {
    width: 128px;
    height: 128px;
}

.instruction-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    max-width: 280px;
    line-height: 1.6;
}

/* ===========================================
   CHAT PANE
   =========================================== */
.chat-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 0;
    height: 100%;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md) var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Chat Message */
.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-message.user {
    align-self: flex-end;
    align-items: flex-end;
}

.chat-message.assistant {
    align-self: flex-start;
    align-items: flex-start;
}

.chat-message.system {
    align-self: center;
    align-items: center;
    max-width: 100%;
}

/* Message Header */
.message-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
    width: 100%;
}

.message-sender {
    font-size: calc(var(--font-size-xs) * 1.4);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.chat-message.user .message-sender {
    color: var(--accent-primary);
}

.chat-message.assistant .message-sender {
    color: var(--text-secondary);
}

.chat-message.user .message-header {
    flex-direction: row-reverse;
    justify-content: space-between;
}

.chat-message.assistant .message-header {
    justify-content: space-between;
}

/* Message Bubble — fixed radius, not affected by theme --radius setting */
.message-bubble {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: calc(var(--font-size-sm) * 1.4);
    line-height: 1.6;
    word-wrap: break-word;
}

.chat-message.user .message-bubble {
    background: var(--user-bubble-bg, var(--accent-primary));
    color: var(--user-bubble-text, var(--accent-text));
    border-bottom-right-radius: 4px;
}

.chat-message.assistant .message-bubble {
    background: var(--assistant-bubble-bg, var(--bg-tertiary));
    color: var(--assistant-bubble-text, var(--text-primary));
    border-bottom-left-radius: 4px;
}

.chat-message.system .message-bubble {
    background: transparent;
    color: var(--text-muted);
    font-style: italic;
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
}

/* Partial message (still being transcribed) */
/* Conversation ended divider */
.conversation-ended-divider {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin: 20px 16px 12px;
    user-select: none;
}

.conversation-ended-line-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.conversation-ended-line-row hr {
    flex: 1;
    border: none;
    border-top: 1px solid var(--border-color, #e0e0e0);
    margin: 0;
}

.conversation-ended-line-row span {
    font-size: 0.75rem;
    color: var(--text-secondary, #999);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.conversation-ended-time {
    font-size: 0.7rem;
    color: var(--text-muted, #aaa);
    text-align: center;
}

.chat-message.partial .message-bubble {
    opacity: 0.7;
}

.chat-message.partial .message-bubble::after {
    content: '...';
    animation: ellipsis 1.5s infinite;
}

@keyframes ellipsis {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* Message timestamp */
.message-time {
    font-size: calc(var(--font-size-xs) * 1.5);
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    align-self: flex-start;
}

.typing-indicator .dot {
    width: 6px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-indicator .dot:nth-child(1) { animation-delay: 0s; }
.typing-indicator .dot:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

/* ===========================================
   CONVERSATION CONTROLS
   =========================================== */
.conversation-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin: var(--spacing-md) auto 0 auto;
    flex-shrink: 0;
}

.active-conversation-btns {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    width: 100%;
    max-width: 400px;
}

.active-conversation-btns[hidden] {
    display: none;
}

/* ===========================================
   START TALKING BUTTON
   =========================================== */
.start-talking-btn[hidden] {
    display: none;
}

.start-talking-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    width: max-content;
    max-width: 100%;
    margin: var(--spacing-md) auto 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-xl);
    color: var(--accent-text);
    font-family: var(--font-family);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--accent-primary) 30%, transparent);
    flex-shrink: 0;
}

.start-talking-btn:hover {
    background: var(--accent-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px color-mix(in srgb, var(--accent-primary) 40%, transparent);
}

.start-talking-btn:active {
    background: var(--accent-primary-active);
    transform: translateY(0);
}

.start-talking-btn:focus-visible {
    outline: 3px solid var(--text-primary);
    outline-offset: 4px;
    box-shadow: 0 6px 20px color-mix(in srgb, var(--accent-primary) 40%, transparent), 0 0 0 7px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.start-talking-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Active state (conversation in progress) */
.start-talking-btn[aria-pressed="true"] {
    background: var(--status-error);
    animation: glow 2s ease-in-out infinite;
}

.start-talking-btn .btn-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.3;
}

.start-talking-btn .btn-text .tap-to-stop {
    font-size: var(--font-size-sm);
    font-weight: 400;
    opacity: 0.8;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4); }
    50% { box-shadow: 0 4px 25px rgba(239, 68, 68, 0.6); }
}

/* Pulsating state (feedback collection phase) */
.start-talking-btn.pulsating {
    background: #f59e0b;
    animation: pulsate 1.5s ease-in-out infinite;
}

@keyframes pulsate {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
    }
    50% {
        transform: scale(1.03);
        box-shadow: 0 6px 25px rgba(245, 158, 11, 0.6);
    }
}

@media (prefers-reduced-motion: reduce) {
    .start-talking-btn.pulsating {
        animation: none;
        opacity: 0.9;
        transition: opacity 0.3s ease;
    }
}

.mic-icon,
.phone-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

/* ===========================================
   MUTE & END BUTTONS (Active Conversation)
   =========================================== */
.mute-btn,
.end-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex: 1;
    max-width: 180px;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
}

.mute-btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.mute-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--border-color-light);
}

.mute-btn:active {
    transform: scale(0.98);
}

.mute-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
}

.mute-btn[aria-pressed="true"] {
    background: var(--status-error);
    color: white;
    border-color: var(--status-error);
}

.mute-btn[aria-pressed="true"]:hover {
    background: #dc2626;
}

.end-btn {
    background: rgba(220, 38, 38, 0.1);
    color: var(--status-error);
    border: 1px solid rgba(220, 38, 38, 0.3);
}

.theme-dark .end-btn {
    background: rgba(127, 29, 29, 0.8);
    color: #fecaca;
    border-color: rgba(239, 68, 68, 0.3);
}

.end-btn:hover {
    background: rgba(220, 38, 38, 0.2);
    border-color: rgba(220, 38, 38, 0.5);
}

.theme-dark .end-btn:hover {
    background: rgba(153, 27, 27, 0.9);
    border-color: rgba(239, 68, 68, 0.5);
}

.end-btn:active {
    transform: scale(0.98);
}

.end-btn:focus-visible {
    outline: 3px solid var(--status-error);
    outline-offset: 3px;
}

[dir="rtl"] .active-conversation-btns {
    flex-direction: row-reverse;
}

[dir="rtl"] .mute-btn,
[dir="rtl"] .end-btn {
    flex-direction: row-reverse;
}

/* ===========================================
   TEXT INPUT AREA (Hybrid voice + text)
   =========================================== */
.text-input-area {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-sm);
    flex-shrink: 0;
}

.text-input-form {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: var(--spacing-xs) var(--spacing-xs) var(--spacing-xs) var(--spacing-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.text-input-form:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-primary) 15%, transparent);
}

.text-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: var(--font-family);
    font-size: 16px; /* Must be >= 16px to prevent mobile browser auto-zoom on focus */
    color: var(--text-primary);
    padding: var(--spacing-sm) 0;
    min-height: 44px;
}

.text-input::placeholder {
    color: var(--text-muted);
}

.text-send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    min-width: 44px;
    min-height: 44px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.text-send-btn:hover {
    background: var(--accent-primary-hover);
    transform: scale(1.05);
}

.text-send-btn:active {
    transform: scale(0.95);
}

.text-send-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 3px;
}

.text-send-btn:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

/* ===========================================
   FOOTER
   =========================================== */
.conversation-footer {
    text-align: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--safe-area-bottom);
    flex-shrink: 0;
}

.powered-by {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.powered-by a {
    color: inherit;
    text-decoration: underline;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.separator {
    color: var(--text-muted);
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover,
.footer-link:focus {
    color: var(--text-secondary);
}

.footer-link:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ===========================================
   MODAL
   =========================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.theme-dark .modal-overlay {
    background: rgba(0, 0, 0, 0.7);
}

.modal-overlay:not([hidden]) {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay:not([hidden]) .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover,
.modal-close:focus {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-close:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--accent-primary) 20%, transparent);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-xl);
}

.modal-body {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.modal-body p {
    margin-bottom: var(--spacing-md);
}

.modal-body ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.modal-body li {
    margin-bottom: var(--spacing-xs);
}

/* Footer link confirmation modal */
.confirm-modal-content {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.confirm-modal-desc {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.confirm-modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.confirm-modal-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border-secondary);
    min-width: 100px;
    min-height: 44px;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.confirm-modal-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
}

.confirm-modal-btn--cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.confirm-modal-btn--cancel:hover {
    background: var(--bg-secondary);
}

.confirm-modal-btn--continue {
    background: var(--accent-primary);
    color: #fff;
    border-color: var(--accent-primary);
}

.confirm-modal-btn--continue:hover {
    opacity: 0.9;
}

/* ===========================================
   TABLET STYLES (min-width: 768px)
   =========================================== */
@media (min-width: 768px) {
    :root {
        --font-size-base: 1rem;
        --font-size-lg: 1.25rem;
        --font-size-xl: 1.5rem;
        --font-size-2xl: 2rem;
    }

    .conversation-container {
        max-width: 600px;
        margin: 0 auto;
        padding: var(--spacing-xl);
        height: 100vh;
        height: 100dvh;
    }

    .project-title {
        font-size: var(--font-size-xl);
    }

    .project-info {
        padding: var(--spacing-lg);
    }

    .project-subtitle {
        font-size: var(--font-size-xl);
    }

    .instruction-text {
        font-size: var(--font-size-lg);
        max-width: 400px;
    }

    .start-talking-btn {
        padding: var(--spacing-lg) var(--spacing-2xl);
        font-size: var(--font-size-xl);
    }
}

/* ===========================================
   LARGE TABLET / SMALL DESKTOP (min-width: 1024px)
   =========================================== */
@media (min-width: 1024px) {
    .conversation-container {
        max-width: 700px;
    }

    .main-content {
        padding: 3px 0;
    }
}

/* ===========================================
   LANDSCAPE MOBILE ADJUSTMENTS
   =========================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .conversation-container {
        padding: var(--spacing-sm);
    }

    .conversation-header {
        padding-bottom: var(--spacing-sm);
    }

    .project-info {
        padding: var(--spacing-sm);
        margin-bottom: 1px;
    }

    .main-content {
        padding: 1px var(--spacing-sm);
    }

    .start-talking-btn {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .conversation-footer {
        padding-top: var(--spacing-sm);
    }
}

/* ===========================================
   WCAG 2.2 AAA: TEXT SPACING SUPPORT (SC 1.4.12)
   =========================================== */
.chat-messages,
.message-bubble,
.instruction-text,
.modal-body {
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: none;
}

.chat-message {
    max-width: 90%;
}

/* ===========================================
   HIGH CONTRAST MODE (WCAG 2.2 AAA Enhanced)
   =========================================== */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #ffffff;
        --bg-secondary: #f0f0f0;
        --bg-tertiary: #e0e0e0;
        --text-primary: #000000;
        --text-secondary: #000000;
        --text-muted: #333333;
        --border-color: #000000;
        --accent-primary: #0000cc;
        --accent-primary-hover: #0000ff;
        --accent-primary-active: #000099;
    }

    .theme-dark {
        --bg-primary: #000000;
        --bg-secondary: #0a0a0a;
        --bg-tertiary: #1a1a1a;
        --text-primary: #ffffff;
        --text-secondary: #ffffff;
        --text-muted: #e0e0e0;
        --border-color: #ffffff;
        --accent-primary: #00d4ff;
        --accent-primary-hover: #33ddff;
        --accent-primary-active: #00b8e0;
    }

    .start-talking-btn {
        border: 3px solid currentColor;
    }

    *:focus-visible {
        outline: 3px solid #ffff00 !important;
        outline-offset: 3px;
    }

    .message-time,
    .project-meta,
    .footer-links,
    .instruction-text {
        color: var(--text-secondary);
    }
}

/* ===========================================
   PRINT STYLES
   =========================================== */
@media print {
    .conversation-container {
        background: white;
        color: black;
    }

    .start-talking-btn,
    .language-selector,
    .font-size-selector,
    .info-btn,
    .text-input-area,
    .conversation-controls {
        display: none;
    }
}

/* ===========================================
   RTL (RIGHT-TO-LEFT) LANGUAGE SUPPORT
   =========================================== */
[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .conversation-header {
    flex-direction: row-reverse;
}

[dir="rtl"] .header-controls {
    flex-direction: row-reverse;
}

[dir="rtl"] .language-menu {
    right: 0;
    left: auto;
}

[dir="rtl"] .dropdown-arrow {
    margin-left: 0;
    margin-right: var(--spacing-xs);
}

[dir="rtl"] .project-info {
    flex-direction: row-reverse;
}

[dir="rtl"] .project-details {
    text-align: right;
}

[dir="rtl"] .chat-message.user {
    align-self: flex-start;
    align-items: flex-start;
}

[dir="rtl"] .chat-message.assistant {
    align-self: flex-end;
    align-items: flex-end;
}

[dir="rtl"] .chat-message.user .message-bubble {
    border-bottom-right-radius: 12px;
    border-bottom-left-radius: 4px;
}

[dir="rtl"] .chat-message.assistant .message-bubble {
    border-bottom-left-radius: 12px;
    border-bottom-right-radius: 4px;
}

[dir="rtl"] .message-header {
    flex-direction: row-reverse;
}

[dir="rtl"] .start-talking-btn {
    flex-direction: row-reverse;
}

[dir="rtl"] .conversation-footer {
    text-align: right;
}

[dir="rtl"] .footer-links {
    flex-direction: row-reverse;
}

[dir="rtl"] .modal-content {
    text-align: right;
}

[dir="rtl"] .modal-close {
    left: var(--spacing-md);
    right: auto;
}

[dir="rtl"] .modal-body ul {
    padding-right: var(--spacing-lg);
    padding-left: 0;
}

[dir="rtl"] .empty-state {
    text-align: right;
}

[dir="rtl"] .text-input-form {
    flex-direction: row-reverse;
    padding: var(--spacing-xs) var(--spacing-md) var(--spacing-xs) var(--spacing-xs);
}