/* CSS Custom Properties for theming and sizing */
:root {
    /* Default Normal Theme */
    --bg-primary: linear-gradient(160deg, #0b1220 0%, #0f1e36 45%, #0a2540 100%);
    --bg-glow-a: rgba(0, 212, 170, 0.10);
    --bg-glow-b: rgba(56, 132, 255, 0.12);
    --bg-surface: rgba(255, 255, 255, 0.08);
    --bg-surface-hover: rgba(255, 255, 255, 0.16);
    --bg-surface-active: rgba(255, 255, 255, 0.22);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --accent-color: #00d4aa;
    --accent-color-rgb: 0, 212, 170;
    --accent-contrast: #00281f;
    --border-color: rgba(255, 255, 255, 0.22);
    --focus-color: #ffb34a;
    --focus-color-rgb: 255, 179, 74;
    --shadow-color: rgba(0, 0, 0, 0.35);
    --glow-accent: rgba(0, 212, 170, 0.45);
    --primary-rgb: 56, 160, 255;
    --secondary-rgb: 255, 107, 53;

    /* Fonts */
    --font-display: 'Space Grotesk', 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-body: 'Atkinson Hyperlegible', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;

    /* Motion */
    --transition-fast: 0.18s ease-out;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);

    /* Radius */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 32px;
    --radius-pill: 999px;

    /* Font Size Variables */
    --font-size-base: 24px;
    --font-size-small: 16px;
    --font-size-large: 32px;
    --font-size-xl: 48px;
    --font-size-heading: 72px;
    
    /* Button Size Variables */
    --button-height-normal: 80px;
    --button-height-large: 200px;
    --button-text-size: 18px;
    --button-text-size-large: 24px;
    --button-icon-size: 32px;
    --button-padding: 20px;
    --button-radius: 16px;
    --button-radius-large: 20px;
    
    /* Spacing Variables */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
}

/* Standard Theme (explicit definition to match the default) */
.theme-standard {
    --bg-primary: linear-gradient(160deg, #0b1220 0%, #0f1e36 45%, #0a2540 100%);
    --bg-surface: rgba(255, 255, 255, 0.08);
    --bg-surface-hover: rgba(255, 255, 255, 0.16);
    --bg-surface-active: rgba(255, 255, 255, 0.22);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --accent-color: #00d4aa;
    --accent-color-rgb: 0, 212, 170;
    --border-color: rgba(255, 255, 255, 0.35);
    --focus-color: #ffb34a;
    --focus-color-rgb: 255, 179, 74;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* High Contrast Theme */
.theme-high-contrast {
    --bg-primary: linear-gradient(160deg, #000000 0%, #101010 50%, #262626 100%);
    --bg-surface: rgba(255, 255, 255, 0.18);
    --bg-surface-hover: rgba(255, 255, 255, 0.3);
    --bg-surface-active: rgba(255, 255, 255, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --accent-color: #ffff00;
    --accent-color-rgb: 255, 255, 0;
    --border-color: rgba(255, 255, 255, 0.75);
    --focus-color: #ffff00;
    --focus-color-rgb: 255, 255, 0;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

/* Dark High Contrast Theme */
.theme-dark-high-contrast {
    --bg-primary: #000000;
    --bg-surface: rgba(255, 255, 255, 0.15);
    --bg-surface-hover: rgba(255, 255, 255, 0.28);
    --bg-surface-active: rgba(255, 255, 255, 0.4);
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --accent-color: #00ff00;
    --accent-color-rgb: 0, 255, 0;
    --border-color: #ffffff;
    --focus-color: #00ff00;
    --focus-color-rgb: 0, 255, 0;
    --shadow-color: rgba(255, 255, 255, 0.3);
}

/* Yellow on Black Theme */
.theme-yellow-black {
    --bg-primary: #000000;
    --bg-surface: rgba(255, 255, 255, 0.1);
    --bg-surface-hover: rgba(255, 255, 255, 0.22);
    --bg-surface-active: rgba(255, 255, 255, 0.32);
    --text-primary: #ffff00;
    --text-secondary: #ffff00;
    --accent-color: #ffffff;
    --accent-color-rgb: 255, 255, 255;
    --border-color: #ffff00;
    --focus-color: #ffffff;
    --focus-color-rgb: 255, 255, 255;
    --shadow-color: rgba(255, 255, 0, 0.4);
}

/* White on Blue Theme */
.theme-white-blue {
    --bg-primary: linear-gradient(160deg, #003366 0%, #0066cc 50%, #0099ff 100%);
    --bg-surface: rgba(255, 255, 255, 0.2);
    --bg-surface-hover: rgba(255, 255, 255, 0.34);
    --bg-surface-active: rgba(255, 255, 255, 0.44);
    --text-primary: #ffffff;
    --text-secondary: #ffffff;
    --accent-color: #ffff00;
    --accent-color-rgb: 255, 255, 0;
    --border-color: rgba(255, 255, 255, 0.75);
    --focus-color: #ffff00;
    --focus-color-rgb: 255, 255, 0;
    --shadow-color: rgba(0, 0, 0, 0.4);
}

/* Font Size Classes */
.font-size-small {
    --font-size-base: 18px;
    --font-size-small: 14px;
    --font-size-large: 24px;
    --font-size-xl: 36px;
    --font-size-heading: 48px;
    --button-text-size: 14px;
    --button-text-size-large: 18px;
}

.font-size-standard {
    --font-size-base: 24px;
    --font-size-small: 16px;
    --font-size-large: 32px;
    --font-size-xl: 48px;
    --font-size-heading: 72px;
    --button-text-size: 18px;
    --button-text-size-large: 24px;
}

.font-size-large {
    --font-size-base: 32px;
    --font-size-small: 20px;
    --font-size-large: 40px;
    --font-size-xl: 64px;
    --font-size-heading: 96px;
    --button-text-size: 24px;
    --button-text-size-large: 32px;
}

.font-size-extra-large {
    --font-size-base: 40px;
    --font-size-small: 24px;
    --font-size-large: 48px;
    --font-size-xl: 72px;
    --font-size-heading: 120px;
    --button-text-size: 32px;
    --button-text-size-large: 40px;
}

.font-size-huge {
    --font-size-base: 56px;
    --font-size-small: 32px;
    --font-size-large: 64px;
    --font-size-xl: 96px;
    --font-size-heading: 144px;
    --button-text-size: 40px;
    --button-text-size-large: 56px;
}


/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--accent-color);
    color: #000000;
    padding: 10px 14px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: bold;
    z-index: 1000;
    border: 2px solid var(--text-primary);
    font-size: var(--font-size-small);
    font-family: var(--font-body);
}

.skip-link:focus {
    top: 6px;
    background: var(--focus-color);
    color: var(--text-primary);
    border-color: var(--accent-color);
    box-shadow: 0 0 8px var(--shadow-color);
    outline: 3px solid var(--text-primary);
    outline-offset: 3px;
}

/* Screen reader only content */
.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;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent-color);
    color: var(--accent-contrast, #000000);
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    border: 3px solid rgba(0, 0, 0, 0.3);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(var(--accent-color-rgb), 0.5);
}

/* Animated aurora background (subtle, high-contrast safe) */
.aurora {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.aurora-blob {
    position: absolute;
    display: block;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.55;
    will-change: transform;
}

.aurora-blob-1 {
    width: 560px;
    height: 560px;
    top: -180px;
    left: -160px;
    background: var(--bg-glow-a, rgba(0, 212, 170, 0.35));
    animation: aurora-drift-1 26s ease-in-out infinite alternate;
}

.aurora-blob-2 {
    width: 640px;
    height: 640px;
    bottom: -260px;
    right: -200px;
    background: var(--bg-glow-b, rgba(56, 132, 255, 0.38));
    animation: aurora-drift-2 32s ease-in-out infinite alternate;
}

.aurora-blob-3 {
    width: 420px;
    height: 420px;
    top: 38%;
    left: 55%;
    background: rgba(var(--primary-rgb), 0.14);
    animation: aurora-drift-3 22s ease-in-out infinite alternate;
}

@keyframes aurora-drift-1 {
    from { transform: translate(0, 0) scale(1); }
    to   { transform: translate(120px, 80px) scale(1.15); }
}

@keyframes aurora-drift-2 {
    from { transform: translate(0, 0) scale(1.1); }
    to   { transform: translate(-100px, -60px) scale(1); }
}

@keyframes aurora-drift-3 {
    from { transform: translate(0, 0) scale(1); }
    to   { transform: translate(-140px, 60px) scale(1.2); }
}

/* Keep high-contrast themes clean */
.theme-high-contrast .aurora-blob,
.theme-dark-high-contrast .aurora-blob,
.theme-yellow-black .aurora-blob,
.theme-white-blue .aurora-blob {
    opacity: 0.18;
}

/* Ensure main content renders above the ambient glows */
.container,
.header-settings,
footer {
    z-index: 1;
}

.container,
footer {
    position: relative;
}

/* Entrance animations */
.hero {
    animation: hero-in var(--transition-slow) both;
}

.mode-indicator {
    animation: hero-in 0.7s 0.15s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.mode-buttons,
.tts-controls,
.reset-button,
#status {
    animation: hero-in var(--transition-slow) 0.25s both;
}

@keyframes hero-in {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Main container */
.container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 20px;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
}

/* Title - Clean and modern */
h1 {
    font-family: var(--font-display);
    font-size: var(--font-size-heading);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    text-shadow: 0 2px 0 rgba(0, 0, 0, 0.25),
                 0 6px 28px var(--glow-accent);
    letter-spacing: 4px;
    text-align: center;
    line-height: 1.02;
}

/* Eyebrow label above the title */
.eyebrow {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--font-size-small);
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-color);
    background: rgba(var(--accent-color-rgb), 0.14);
    border: 1px solid rgba(var(--accent-color-rgb), 0.35);
    padding: 6px 18px;
    border-radius: var(--radius-pill);
    margin-bottom: var(--spacing-md);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}


/* Header settings button */
.header-settings {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 100;
}

@media (max-width: 768px) {
    .header-settings {
        top: 15px;
        right: 15px;
    }
    
    .settings-button {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
}

.settings-button {
    width: 48px;
    height: 48px;
    font-size: 20px;
    background: var(--bg-surface);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    touch-action: manipulation;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px var(--shadow-color),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

.settings-button .material-symbols-rounded {
    font-size: 24px;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.settings-button:hover {
    background: var(--bg-surface-hover);
    transform: scale(1.06) translateY(-1px);
    border-color: var(--accent-color);
    box-shadow: 0 8px 24px var(--shadow-color),
                0 0 0 3px rgba(var(--accent-color-rgb), 0.25);
}

.settings-button:active {
    transform: scale(0.96);
}

.settings-button.active {
    background: var(--accent-color);
    color: #000000;
    border-color: var(--accent-color);
    transform: rotate(45deg);
    box-shadow: 0 4px 20px var(--glow-accent);
}

.settings-button:focus {
    outline: 3px solid var(--focus-color);
    outline-offset: 3px;
}

/* Settings panel */
.settings-panel {
    background: var(--bg-surface);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    color: var(--text-primary);
    border: 2px solid var(--accent-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-small);
    box-shadow: 0 24px 48px var(--shadow-color),
                0 0 0 1px rgba(255, 255, 255, 0.06),
                inset 0 1px 0 rgba(255, 255, 255, 0.12);
    /* Removed max-height and overflow-y to prevent nested scrolling */
    animation: settingsSlideIn 0.3s ease-out;
    outline: none; /* For when focused programmatically */
}

@keyframes settingsSlideIn {
    from {
        opacity: 0;
        transform: translateY(-24px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.settings-panel h2 {
    font-family: var(--font-display);
    font-size: var(--font-size-large);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.settings-section h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    text-align: left;
    display: flex;
    align-items: center;
    gap: 10px;
}

.settings-section .section-icon {
    font-size: 22px;
    color: var(--accent-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: rgba(var(--accent-color-rgb), 0.16);
    flex-shrink: 0;
}

.settings-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.settings-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.setting-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-small);
    font-weight: 500;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.setting-item:hover {
    background: var(--bg-surface-hover);
}

.setting-item label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
}

.setting-item input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 56px;
    height: 32px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.18);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-pill);
    outline: none;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    margin: 0;
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast),
                box-shadow var(--transition-fast);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.25);
}

.setting-item input[type="checkbox"]::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    transition: transform var(--transition-base);
}

.setting-item input[type="checkbox"]:checked {
    background: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(var(--accent-color-rgb), 0.3);
}

.setting-item input[type="checkbox"]:checked::after {
    transform: translateX(24px);
}

.setting-item input[type="checkbox"]:focus {
    outline: 3px solid var(--focus-color);
    outline-offset: 3px;
}

.setting-item input[type="checkbox"]:hover:not(:checked) {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.26);
}

.setting-item select {
    width: 100%;
    max-width: 280px;
    height: 48px;
    font-size: var(--font-size-small);
    font-weight: 500;
    background: var(--bg-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-md);
    transition: all var(--transition-fast);
    font-family: var(--font-body);
}

.setting-item select:hover {
    border-color: var(--accent-color);
}

.setting-item select:focus {
    outline: 3px solid var(--focus-color);
    outline-offset: 2px;
    background: var(--bg-surface-hover);
}

.setting-item select option {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* RTL (Right-to-Left) support for Arabic */
.rtl {
    direction: rtl;
    text-align: right;
}

.rtl .header-settings {
    left: 20px;
    right: auto;
}

.rtl .skip-link {
    right: 6px;
    left: auto;
}

.rtl .setting-item {
    flex-direction: row-reverse;
}

.rtl .setting-item input[type="checkbox"]::after {
    left: auto;
    right: 2px;
}

.rtl .setting-item input[type="checkbox"]:checked::after {
    transform: translateX(-24px);
}

.rtl .nav-home {
    float: right;
}

/* Ensure emojis and camera icon remain LTR */
.rtl .camera-button,
.rtl .settings-button {
    direction: ltr;
}

/* Mode indicator */
.mode-indicator {
    text-align: center;
    margin: 24px 0 40px 0;
    animation: fadeIn 0.3s ease-in-out;
}

.mode-badge {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-pill);
    padding: 8px 22px 8px 8px;
    margin-bottom: 14px;
    box-shadow: 0 8px 24px var(--shadow-color),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.mode-badge:has(.mode-icon) {
    border-color: rgba(var(--accent-color-rgb), 0.35);
    box-shadow: 0 8px 28px var(--shadow-color),
                0 0 0 1px rgba(var(--accent-color-rgb), 0.12),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.mode-icon {
    font-size: 22px;
    color: var(--accent-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(var(--accent-color-rgb), 0.18);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.mode-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.mode-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0;
}

/* Button area container */
.button-area {
    width: 100%;
    max-width: 600px;
    margin-bottom: 40px;
}

.mode-buttons {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
}

/* Large primary buttons */
.large-button {
    height: 200px;
    font-size: 24px;
    border-radius: var(--radius-lg);
}

.large-button .button-text {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.large-button .button-subtitle {
    font-size: 16px;
    opacity: 0.92;
    font-weight: 400;
}

/* Secondary smaller buttons */
.secondary-button {
    height: 80px;
    font-size: 18px;
    border-radius: var(--radius-md);
    opacity: 0.9;
    flex-direction: row !important;
    gap: 14px !important;
}

.secondary-button:hover {
    opacity: 1;
}

.secondary-button .icon {
    font-size: 32px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

.secondary-button .button-text {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
}

.secondary-button.recording {
    background: linear-gradient(145deg, #ff5f52, #e0352c);
    animation: pulse 1.5s ease-in-out infinite;
    box-shadow: 0 8px 28px rgba(244, 67, 54, 0.6), 
                0 4px 8px rgba(0, 0, 0, 0.3);
    opacity: 1;
    border-color: rgba(255, 255, 255, 0.35);
}

.secondary-button.recording .icon {
    animation: pulse-icon 1.5s ease-in-out infinite;
}

/* Stop TTS button */
.stop-tts-button {
    width: 180px;
    height: 45px;
    background: rgba(244, 67, 54, 0.9);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    margin: 12px auto;
    touch-action: manipulation;
    box-shadow: 0 3px 8px rgba(244, 67, 54, 0.3);
}

.stop-tts-button:hover {
    background: rgba(244, 67, 54, 1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.4);
}

.stop-tts-button:focus {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

.stop-tts-button .material-symbols-rounded {
    font-size: 16px;
}

/* TTS Controls */
.tts-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin: var(--spacing-md) auto;
    max-width: 600px;
}

.tts-control-button {
    min-width: 100px;
    height: 48px;
    background: var(--bg-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-small);
    font-weight: 600;
    touch-action: manipulation;
    box-shadow: 0 2px 8px var(--shadow-color),
                inset 0 1px 0 rgba(255, 255, 255, 0.12);
    flex: 1;
    max-width: 120px;
}

.tts-control-button:hover {
    background: var(--bg-surface-hover);
    transform: translateY(-2px);
    border-color: var(--accent-color);
    box-shadow: 0 6px 16px var(--shadow-color);
}

.tts-control-button:focus {
    outline: 3px solid var(--focus-color);
    outline-offset: 2px;
}

.tts-control-button.stop-button {
    background: rgba(244, 67, 54, 0.9);
    border-color: rgba(244, 67, 54, 1);
}

.tts-control-button.stop-button:hover {
    background: rgba(244, 67, 54, 1);
}

.tts-control-button .material-symbols-rounded {
    font-size: 20px;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20;
}

/* Reset button */
.reset-button {
    width: 100%;
    height: 60px;
    background: var(--bg-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    margin-top: 20px;
    touch-action: manipulation;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.reset-button:hover {
    background: var(--bg-surface-hover);
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.reset-button:active {
    transform: translateY(0) scale(0.99);
}

.reset-button:focus {
    outline: 3px solid var(--focus-color);
    outline-offset: 3px;
}

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

/* Material Design Icons */
.material-symbols-rounded {
    font-family: 'Material Symbols Rounded';
    font-weight: normal;
    font-style: normal;
    font-size: 48px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
}

/* Base button styles */
.camera-button, .voice-button {
    width: 100%;
    height: 180px;
    font-size: 20px;
    font-weight: 600;
    border: 2px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: transform var(--transition-fast),
                box-shadow var(--transition-base),
                background var(--transition-base),
                filter var(--transition-fast),
                border-color var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
    
    /* Motor accessibility improvements */
    min-height: 60px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Soft top-edge highlight for depth */
.camera-button::before,
.voice-button::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.24), rgba(255, 255, 255, 0) 45%);
    pointer-events: none;
}

/* Shine sweep on hover */
.camera-button::after,
.voice-button::after {
    content: '';
    position: absolute;
    top: -60%;
    left: -60%;
    width: 60%;
    height: 220%;
    transform: rotate(20deg) translateX(-150%);
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    pointer-events: none;
    transition: transform 0.9s ease;
}

/* Camera button - Blue theme */
.camera-button {
    background: linear-gradient(145deg, #38a0ff, #1565d8);
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(33, 150, 243, 0.45), 
                0 4px 8px rgba(0, 0, 0, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Voice button - Orange theme */
.voice-button {
    background: linear-gradient(145deg, #ff8a3d, #ef5b0a);
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.45), 
                0 4px 8px rgba(0, 0, 0, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Button icons - glass chip */
.camera-button .icon, .voice-button .icon {
    font-size: 46px;
    font-variation-settings: 'FILL' 1, 'wght' 600, 'GRAD' 0, 'opsz' 48;
    width: 84px;
    height: 84px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22),
                inset 0 1px 0 rgba(255, 255, 255, 0.35);
    margin-bottom: 2px;
    transition: transform var(--transition-base);
}

.camera-button:hover .icon, .voice-button:hover .icon {
    transform: scale(1.08);
}

/* Compact icon chip for secondary (smaller) buttons */
.secondary-button .icon {
    font-size: 30px;
    width: 52px;
    height: 52px;
}

/* Default button text */
.camera-button .button-text, .voice-button .button-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
}

/* Button hover and interaction states */
.camera-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(33, 150, 243, 0.6), 
                0 6px 12px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.25);
    background: linear-gradient(145deg, #4db1ff, #1a6fd8);
    filter: brightness(1.06);
}

.camera-button:hover::after,
.voice-button:hover::after {
    transform: rotate(20deg) translateX(320%);
}

.camera-button:active {
    transform: translateY(0px) scale(0.98);
    box-shadow: 0 4px 16px rgba(33, 150, 243, 0.45);
}

.camera-button:focus,
.camera-button:focus-visible {
    outline: 4px solid var(--focus-color);
    outline-offset: 4px;
}

.camera-button:disabled,
.camera-button.loading {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    filter: saturate(0.2);
    background: linear-gradient(145deg, #757575, #616161);
}

.voice-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 40px rgba(255, 107, 53, 0.6), 
                0 6px 12px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.25);
    background: linear-gradient(145deg, #ffa35c, #f2620e);
    filter: brightness(1.06);
}

.voice-button:active {
    transform: translateY(0px) scale(0.98);
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.45);
}

.voice-button:focus,
.voice-button:focus-visible {
    outline: 4px solid var(--focus-color);
    outline-offset: 4px;
}

.voice-button:disabled,
.voice-button.loading {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    filter: saturate(0.2);
    background: linear-gradient(145deg, #757575, #616161);
}

.voice-button.recording {
    background: linear-gradient(145deg, #ff5f52, #e0352c);
    animation: pulse 1.5s ease-in-out infinite;
    box-shadow: 0 8px 28px rgba(244, 67, 54, 0.6), 
                0 4px 8px rgba(0, 0, 0, 0.3);
}

.voice-button.recording::before {
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0) 50%);
}

.voice-button.recording .icon {
    animation: pulse-icon 1.5s ease-in-out infinite;
    background: rgba(255, 255, 255, 0.2);
}

.voice-button.recording::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    border: 3px solid rgba(255, 107, 107, 0.6);
    animation: recording-ring 1.5s ease-out infinite;
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1);
        opacity: 1;
    }
    50% { 
        transform: scale(1.03);
        opacity: 0.97;
    }
}

@keyframes pulse-icon {
    0%, 100% { 
        font-variation-settings: 'FILL' 1, 'wght' 600, 'GRAD' 0, 'opsz' 48;
    }
    50% { 
        font-variation-settings: 'FILL' 1, 'wght' 700, 'GRAD' 0, 'opsz' 48;
    }
}

@keyframes recording-ring {
    0% {
        opacity: 0.9;
        transform: scale(1);
    }
    100% {
        opacity: 0;
        transform: scale(1.06);
    }
}

/* Gentle breathing glow on the primary voice button */
.large-button.voice-button {
    animation: button-breathe 4s ease-in-out infinite;
}

@keyframes button-breathe {
    0%, 100% {
        box-shadow: 0 8px 24px rgba(255, 107, 53, 0.45),
                     0 4px 8px rgba(0, 0, 0, 0.25),
                     inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }
    50% {
        box-shadow: 0 8px 34px rgba(255, 107, 53, 0.68),
                     0 4px 8px rgba(0, 0, 0, 0.25),
                     inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }
}

/* Recording pulse must override the breathing glow */
.large-button.voice-button.recording {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Status message - console style */
.status-message {
    width: 100%;
    font-size: 18px;
    font-weight: 500;
    padding: 20px 24px 20px 30px;
    border: none;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    color: var(--text-primary);
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-shadow: 0 12px 28px var(--shadow-color),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.22);
    border-left: 6px solid var(--accent-color);
    position: relative;
}

.status-message::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 50%;
    width: 10px;
    height: 10px;
    transform: translateY(-50%);
    border-radius: 50%;
    background: var(--accent-color);
    box-shadow: 0 0 10px rgba(var(--accent-color-rgb), 0.8);
}

.status-message.error {
    background: rgba(255, 71, 87, 0.85);
    color: #ffffff;
    border: 2px solid rgba(255, 120, 130, 0.4);
    border-left: 6px solid #ff4757;
    box-shadow: 0 12px 28px rgba(255, 71, 87, 0.35);
}

.status-message.error::before {
    background: #ff4757;
    box-shadow: 0 0 10px rgba(255, 71, 87, 0.8);
}

.status-message.success {
    background: rgba(0, 212, 170, 0.85);
    color: #ffffff;
    border: 2px solid rgba(60, 235, 200, 0.4);
    border-left: 6px solid #00d4aa;
    box-shadow: 0 12px 28px rgba(0, 212, 170, 0.35);
}

.status-message.success::before {
    background: #00d4aa;
    box-shadow: 0 0 10px rgba(0, 212, 170, 0.8);
}

.status-message.loading {
    background: rgba(102, 126, 234, 0.85);
    color: #ffffff;
    border: 2px solid rgba(140, 160, 250, 0.4);
    border-left: 6px solid #667eea;
    box-shadow: 0 12px 28px rgba(102, 126, 234, 0.35);
}

.status-message.loading::before {
    width: 12px;
    height: 12px;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #ffffff;
    border-radius: 50%;
    box-shadow: none;
    animation: status-spin 0.8s linear infinite;
}

@keyframes status-spin {
    to { transform: translateY(-50%) rotate(360deg); }
}

/* Footer */
footer {
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding: 28px 30px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 400;
}

footer p {
    margin-bottom: 10px;
}

footer p:last-child {
    margin-bottom: 0;
    font-size: 14px;
    opacity: 0.85;
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    padding: 6px 10px;
    border-radius: 8px;
}

footer a:hover {
    color: var(--text-primary);
    background: rgba(var(--accent-color-rgb), 0.25);
    text-decoration: none;
}

footer a:focus {
    outline: 3px solid var(--focus-color);
    outline-offset: 2px;
}

/* Responsive design - Mobile first */
@media (min-width: 768px) {
    body {
        font-size: 26px;
    }
    
    h1 {
        font-size: 96px;
        margin-bottom: 60px;
    }
    
    .button-row {
        flex-direction: row;
        max-width: 800px;
        gap: 30px;
    }
    
    .camera-button,
    .voice-button {
        height: 200px;
        font-size: 28px;
        flex: 1;
    }
    
    .status-message {
        font-size: 20px;
        padding: 24px 30px;
    }
}

/* Large screens */
@media (min-width: 1024px) {
    .container {
        max-width: 900px;
    }
    
    body {
        font-size: 28px;
    }
    
    h1 {
        font-size: 120px;
    }
    
    .button-row {
        max-width: 900px;
        gap: 40px;
    }
    
    .camera-button,
    .voice-button {
        height: 220px;
        font-size: 32px;
    }
    
    .status-message {
        font-size: 22px;
        padding: 28px 36px;
    }
}

/* Page-specific styles for About, Help, Contact pages */
.nav-home {
    display: inline-block;
    background-color: var(--bg-surface);
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: 700;
    padding: 15px 25px;
    margin: 20px 0 30px 0;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    min-height: 44px;
    touch-action: manipulation;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.nav-home:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

.nav-home:focus {
    outline: 4px solid var(--focus-color);
    outline-offset: 4px;
    background-color: var(--bg-surface);
    color: var(--text-primary);
}

.page-content {
    max-width: 800px;
    margin: 20px auto 40px;
    padding: var(--spacing-lg);
    text-align: left;
    background: var(--bg-surface);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 48px var(--shadow-color),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.page-content h1 {
    text-align: center;
    font-family: var(--font-display);
    font-size: var(--font-size-heading);
    margin-bottom: 40px;
    color: var(--text-primary);
    text-shadow: 0 6px 28px var(--glow-accent);
}

.page-content h2 {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 30px 0 15px 0;
    letter-spacing: 0.5px;
}

.page-content h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-large);
    font-weight: 700;
    color: var(--text-primary);
    margin: 20px 0 10px 0;
}

.page-content p {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.page-content ul,
.page-content ol {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: 20px;
    padding-left: 30px;
    color: var(--text-primary);
}

.page-content li {
    margin-bottom: 8px;
}

.page-content strong {
    font-weight: 900;
    color: var(--text-primary);
}

.page-content a {
    color: var(--accent-color);
    font-weight: 900;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    background-color: transparent;
}

.page-content a:hover {
    background-color: var(--accent-color);
    color: var(--bg-primary);
    padding: 2px 6px;
    text-decoration: none;
}

.page-content a:focus {
    outline: 4px solid var(--focus-color);
    outline-offset: 2px;
    background-color: var(--accent-color);
    color: var(--bg-primary);
    padding: 2px 6px;
    text-decoration: none;
}

.page-content code {
    background-color: #000000;
    color: #ffff00;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 18px;
    font-weight: bold;
}

.page-content kbd {
    background-color: #000000;
    color: #ffffff;
    padding: 6px 10px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    font-weight: bold;
    border: 2px solid #333333;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.page-content dl {
    margin-bottom: 25px;
}

.page-content dt {
    font-weight: 900;
    margin-top: 15px;
    margin-bottom: 5px;
}

.page-content dd {
    margin-left: 25px;
    margin-bottom: 10px;
}

.action-buttons {
    text-align: center;
    margin: 40px 0;
}

.button-link {
    display: inline-block;
    background-color: var(--accent-color);
    background-image: linear-gradient(145deg, rgba(255, 255, 255, 0.28), rgba(0, 0, 0, 0.16));
    color: var(--accent-contrast, #000000);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: 900;
    padding: 20px 30px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    min-height: 44px;
    touch-action: manipulation;
    box-shadow: 0 10px 28px var(--glow-accent);
}

.button-link:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
    transform: translateY(-2px) scale(1.02);
    border-color: var(--text-primary);
}

.button-link:focus {
    outline: 4px solid var(--focus-color);
    outline-offset: 4px;
    background-color: var(--accent-color);
    background-image: none;
    color: var(--accent-contrast, #000000);
}

/* Responsive adjustments for content pages */
@media (min-width: 768px) {
    .page-content h1 {
        font-size: 60px;
    }
    
    .page-content h2 {
        font-size: 38px;
    }
    
    .page-content h3 {
        font-size: 28px;
    }
    
    .page-content p,
    .page-content ul,
    .page-content ol {
        font-size: 22px;
    }
    
    .nav-home {
        font-size: 22px;
        padding: 18px 30px;
    }
    
    .button-link {
        font-size: 32px;
        padding: 25px 40px;
    }
}

@media (min-width: 1024px) {
    .page-content h1 {
        font-size: 72px;
    }
    
    .page-content h2 {
        font-size: 44px;
    }
    
    .page-content p,
    .page-content ul,
    .page-content ol {
        font-size: 24px;
    }
    
    .button-link {
        font-size: 36px;
        padding: 30px 50px;
    }
}