/* =============================================================================
   TTS.ai - Main Stylesheet
   Light Grayscale Theme, Bootstrap 5.3 based
   REVERT TO BLACK: git checkout static/css/styles.css templates/base.html
   ============================================================================= */

/* =============================================================================
   CSS Custom Properties — Light Grayscale
   ============================================================================= */
:root {
    --tts-bg: #f7f7f8;
    --tts-bg-card: #ffffff;
    --tts-bg-elevated: #f0f0f2;
    --tts-bg-input: #ffffff;
    --tts-border: #e2e2e5;
    --tts-border-hover: #c8c8cc;
    --tts-text: #1a1a1a;
    --tts-text-secondary: #6b6b6b;
    --tts-primary: #1a1a1a;
    --tts-primary-hover: #333;
    --tts-primary-glow: rgba(0, 0, 0, 0.04);
    --tts-accent: #e60000;
    --tts-success: #4a9e6a;
    --tts-warning: #b08930;
    --tts-danger: #c44040;
    --tts-radius: 0.5rem;
    --tts-radius-lg: 0.75rem;
    --tts-transition: 0.2s ease;
    --tts-transition-slow: 0.3s ease;
    --tts-gradient: linear-gradient(135deg, #333, #666);
    --tts-gradient-subtle: linear-gradient(135deg, rgba(0, 0, 0, 0.01), rgba(0, 0, 0, 0.02));
}

/* =============================================================================
   Bootstrap 5.3 Variable Overrides — Light Grayscale
   ============================================================================= */
[data-bs-theme="light"] {
    --bs-body-bg: #f7f7f8;
    --bs-body-bg-rgb: 247, 247, 248;
    --bs-body-color: #1a1a1a;
    --bs-body-color-rgb: 26, 26, 26;

    --bs-primary: #1a1a1a;
    --bs-primary-rgb: 26, 26, 26;
    --bs-primary-bg-subtle: #f0f0f2;
    --bs-primary-border-subtle: #d0d0d4;
    --bs-primary-text-emphasis: #1a1a1a;

    --bs-secondary-color: #6b6b6b;
    --bs-secondary-bg: #f0f0f2;
    --bs-tertiary-color: #888;
    --bs-tertiary-bg: #f7f7f8;

    --bs-success: #4a9e6a;
    --bs-success-rgb: 74, 158, 106;
    --bs-warning: #b08930;
    --bs-warning-rgb: 176, 137, 48;
    --bs-danger: #c44040;
    --bs-danger-rgb: 196, 64, 64;
    --bs-info: #5b8dd9;
    --bs-info-rgb: 91, 141, 217;

    --bs-link-color: #1a1a1a;
    --bs-link-hover-color: #e60000;
    --bs-border-color: #e2e2e5;
    --bs-emphasis-color: #1a1a1a;

    --bs-focus-ring-color: rgba(110, 142, 250, 0.2);
}

/* =============================================================================
   Base
   ============================================================================= */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--tts-bg);
    color: var(--tts-text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

main {
    flex: 1;
    overflow-x: hidden;
}

a {
    transition: color var(--tts-transition);
}

/* Bootstrap color utility overrides for light grayscale */
.text-primary { color: #1a1a1a !important; }
.text-success { color: #4a9e6a !important; }
.text-warning { color: #b08930 !important; }
.text-danger { color: #c44040 !important; }
.text-info { color: #5b8dd9 !important; }
.text-light { color: #6b6b6b !important; }
.text-dark { color: #1a1a1a !important; }
.text-secondary { color: #6b6b6b !important; }

.bg-primary { background-color: #1a1a1a !important; color: #fff !important; }
.bg-primary.bg-opacity-10 { background-color: rgba(230, 0, 0, 0.1) !important; color: inherit !important; }
.bg-primary.bg-opacity-10 .text-primary { color: #e60000 !important; }
.bg-success { background-color: #eaf5ee !important; color: #2d7a48 !important; }
.bg-warning { background-color: #faf3e0 !important; color: #8a6b1e !important; }
.bg-danger { background-color: #fae8e8 !important; color: #a03030 !important; }
.bg-dark { background-color: #ffffff !important; }
.bg-black { background-color: #1a1a1a !important; color: #fff !important; }
.bg-secondary { background-color: #e8e8ea !important; color: #555 !important; }

.border-primary { border-color: #1a1a1a !important; }
.border-secondary { border-color: #e2e2e5 !important; }

/* Badge overrides */
.badge.bg-primary { background-color: #1a1a1a !important; color: #fff !important; }
.badge.bg-success { background-color: #eaf5ee !important; color: #2d7a48 !important; }
.badge.bg-warning { background-color: #faf3e0 !important; color: #8a6b1e !important; }
.badge.bg-info { background-color: #e8f0fc !important; color: #3a6cb5 !important; }
.badge.bg-danger { background-color: #fae8e8 !important; color: #a03030 !important; }
.badge.bg-secondary { background-color: #e8e8ea !important; color: #555 !important; }

h1, h2, h3, h4, h5, h6 {
    letter-spacing: -0.02em;
    font-weight: 600;
    color: #1a1a1a;
}

.lead {
    color: var(--tts-text-secondary);
    font-weight: 400;
}

/* Section spacing */
.section-separator {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--tts-border), transparent);
    margin: 0;
    opacity: 0.6;
}

/* =============================================================================
   Buttons — Dark primary on light
   ============================================================================= */
.btn-primary {
    background: #1a1a1a;
    border: none;
    color: #fff;
    font-weight: 600;
    transition: all var(--tts-transition);
}

.btn-primary:hover,
.btn-primary:focus {
    background: #333;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    transform: translateY(-1px);
    color: #fff;
}

.btn-primary:active {
    transform: translateY(0);
    background: #444;
    color: #fff;
}

.btn-outline-light {
    border-color: #d0d0d4;
    color: #555;
    font-weight: 500;
}

.btn-outline-light:hover {
    background-color: #f0f0f2;
    border-color: #aaa;
    color: #1a1a1a;
}

.btn-outline-dark {
    border-color: #d0d0d4;
    color: #555;
}

.btn-outline-dark:hover {
    background-color: #1a1a1a;
    border-color: #1a1a1a;
    color: #fff;
}

.btn-success {
    background: #4a9e6a;
    border-color: #4a9e6a;
    color: #fff;
}

.btn-success:hover {
    background: #3d8a5a;
    border-color: #3d8a5a;
    color: #fff;
}

.btn-warning {
    background: #b08930;
    border-color: #b08930;
    color: #fff;
}

.btn-warning:hover {
    background: #9a7828;
    border-color: #9a7828;
    color: #fff;
}

.btn-outline-primary {
    border-color: #d0d0d4;
    color: #555;
}

.btn-outline-primary:hover {
    background-color: #1a1a1a;
    border-color: #1a1a1a;
    color: #fff;
}

.btn-outline-secondary {
    border-color: #d0d0d4;
    color: #6b6b6b;
}

.btn-outline-secondary:hover {
    background-color: #f0f0f2;
    border-color: #aaa;
    color: #1a1a1a;
}

/* =============================================================================
   Navigation — clean white with subtle shadow
   ============================================================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: #fff;
}

.navbar {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background-color: rgba(255, 255, 255, 0.95) !important;
    border-bottom: 1px solid #e2e2e5 !important;
    padding-top: 0.35rem;
    padding-bottom: 0.35rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.01em;
}

.navbar .nav-link {
    transition: color var(--tts-transition), background-color var(--tts-transition);
    border-radius: var(--tts-radius);
    padding-left: 0.75rem;
    padding-right: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: #6b6b6b !important;
}

.navbar .nav-link:hover {
    background-color: rgba(0, 0, 0, 0.03);
    color: #1a1a1a !important;
}

.navbar .nav-link.active {
    color: #1a1a1a !important;
}

/* Mega Dropdown */
.mega-dropdown {
    width: 100%;
    max-height: none;
    overflow-y: visible;
    border: 1px solid #e2e2e5;
    background-color: #fff !important;
    border-radius: var(--tts-radius-lg);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

@media (min-width: 992px) {
    .mega-dropdown {
        min-width: 680px;
        left: 0;
    }
}

.mega-dropdown .dropdown-header {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-bottom: 0.5rem;
    margin-bottom: 0.25rem;
    border-bottom: 1px solid var(--tts-border);
    color: #999 !important;
}

.mega-dropdown .dropdown-item {
    border-radius: var(--tts-radius);
    padding: 0.4rem 0.75rem;
    font-size: 0.9rem;
    transition: background-color var(--tts-transition);
    color: #555;
}

.mega-dropdown .dropdown-item:hover {
    background-color: #f5f5f7;
    color: #1a1a1a;
}

.mega-dropdown .dropdown-item i {
    width: 1.25rem;
    text-align: center;
    opacity: 0.5;
}

.mega-dropdown .dropdown-item:hover i {
    opacity: 1;
}

/* Language & other dropdowns */
.dropdown-menu:not(.mega-dropdown) {
    max-height: 300px;
    overflow-y: auto;
    background-color: #fff;
    border-color: #e2e2e5;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.dropdown-menu:not(.mega-dropdown) .dropdown-item {
    color: #555;
}

.dropdown-menu:not(.mega-dropdown) .dropdown-item:hover,
.dropdown-menu:not(.mega-dropdown) .dropdown-item.active {
    background-color: #f5f5f7;
    color: #1a1a1a;
}

/* =============================================================================
   Product Navigation Bar (below main navbar)
   ============================================================================= */
.product-nav {
    background: #fff;
}

.product-nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 0.85rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: #888;
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: color var(--tts-transition), border-color var(--tts-transition);
}

.product-nav-link:hover {
    color: #333;
}

.product-nav-link.active {
    color: #1a1a1a;
    border-bottom-color: #e60000;
}

.product-nav-link i {
    font-size: 0.8rem;
    opacity: 0.6;
}

.product-nav-link.active i,
.product-nav-link:hover i {
    opacity: 1;
}

.product-nav .d-flex::-webkit-scrollbar {
    display: none;
}

@media (max-width: 991.98px) {
    .navbar {
        padding-top: 0.25rem;
        padding-bottom: 0.25rem;
    }

    .product-nav-link {
        padding: 0.5rem 0.65rem;
        font-size: 0.8rem;
    }
}

/* =============================================================================
   Hero Section
   ============================================================================= */
.hero-section {
    background: #fff;
    position: relative;
    overflow: hidden;
    padding-top: 4rem !important;
    padding-bottom: 4rem !important;
    border-bottom: 1px solid #e2e2e5;
}

.hero-section .hero-heading {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #1a1a1a;
}

.hero-section .hero-heading .hero-accent {
    color: #1a1a1a;
}

.hero-section .hero-sub {
    font-size: 1.15rem;
    color: #6b6b6b;
    font-weight: 400;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.hero-section .text-primary {
    color: #1a1a1a !important;
}

/* =============================================================================
   Tool Cards (Homepage grid)
   ============================================================================= */
.tool-card {
    transition: transform var(--tts-transition-slow), border-color var(--tts-transition-slow), box-shadow var(--tts-transition-slow);
    cursor: pointer;
    background: #fff !important;
    border: 1px solid #e2e2e5 !important;
}

.tool-card:hover {
    transform: translateY(-4px);
    border-color: #c8c8cc !important;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.02);
    background: #fff !important;
}

.tool-card:hover .display-5,
.tool-card:hover .tool-icon {
    transform: scale(1.1);
    transition: transform var(--tts-transition-slow);
}

.tool-card .display-5,
.tool-card .tool-icon {
    transition: transform var(--tts-transition-slow);
}

.tool-card .card-body {
    position: relative;
    z-index: 1;
}

.tool-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.tool-card p {
    font-size: 0.8rem;
    line-height: 1.5;
}

/* =============================================================================
   Model Cards
   ============================================================================= */
.model-card {
    transition: transform var(--tts-transition-slow), border-color var(--tts-transition-slow), box-shadow var(--tts-transition-slow);
    background: #fff !important;
    cursor: pointer;
}

.model-card:hover {
    transform: translateY(-2px);
    border-color: #c8c8cc !important;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.model-card .badge {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

/* =============================================================================
   Audio Player Component
   ============================================================================= */
.audio-player-wrap .card {
    transition: border-color var(--tts-transition);
}

.audio-player-wrap .audio-play-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--tts-transition), box-shadow var(--tts-transition);
}

.audio-player-wrap .audio-play-btn:hover {
    transform: scale(1.05);
}

.audio-player-wrap .audio-play-btn:active {
    transform: scale(0.95);
}

.audio-progress-bar {
    width: 100%;
    height: 6px;
    appearance: none;
    -webkit-appearance: none;
    background: var(--tts-border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    transition: height var(--tts-transition);
}

.audio-progress-bar:hover {
    height: 8px;
}

.audio-progress-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: #1a1a1a;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
}

.audio-progress-bar::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: #1a1a1a;
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
}

/* Audio Waveform Placeholder */
.audio-waveform {
    height: 40px;
    background: linear-gradient(90deg,
        var(--tts-border) 0%,
        var(--tts-border-hover) 25%,
        var(--tts-border) 50%,
        var(--tts-border-hover) 75%,
        var(--tts-border) 100%
    );
    background-size: 200% 100%;
    border-radius: var(--tts-radius);
    position: relative;
    overflow: hidden;
}

.audio-waveform.loading {
    animation: waveform-shimmer 1.5s ease infinite;
}

@keyframes waveform-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.audio-waveform-bars {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    height: 100%;
    padding: 4px 8px;
}

.audio-waveform-bars .bar {
    width: 3px;
    background-color: #1a1a1a;
    border-radius: 2px;
    transition: height 0.1s ease;
    opacity: 0.3;
}

.audio-waveform-bars .bar.active {
    opacity: 0.8;
}

/* =============================================================================
   File Upload Area
   ============================================================================= */
.file-upload-area {
    border: 2px dashed #d0d0d4 !important;
    border-radius: var(--tts-radius-lg) !important;
    background-color: #fafafa;
    transition: border-color var(--tts-transition-slow), background-color var(--tts-transition-slow), box-shadow var(--tts-transition-slow);
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: #aaa !important;
    background-color: #f5f5f7;
}

.file-upload-area.drag-hover {
    border-color: #e60000 !important;
    background-color: #f0f4ff;
    box-shadow: 0 0 24px rgba(110, 142, 250, 0.08);
}

.file-upload-area.drag-hover .upload-placeholder i {
    transform: scale(1.15);
    color: #e60000 !important;
}

.file-upload-area .upload-placeholder i {
    transition: transform var(--tts-transition-slow), color var(--tts-transition-slow);
}

.file-upload-area .upload-browse-link {
    text-decoration: none;
    font-weight: 600;
}

.file-upload-area .upload-browse-link:hover {
    text-decoration: underline;
}

.file-upload-area .upload-preview {
    padding: 0.5rem;
}

/* =============================================================================
   Voice Chat Interface
   ============================================================================= */
.voice-chat-container {
    display: flex;
    flex-direction: column;
    height: 500px;
    max-height: 70vh;
}

.voice-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scroll-behavior: smooth;
}

.voice-chat-messages::-webkit-scrollbar {
    width: 6px;
}

.voice-chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.voice-chat-messages::-webkit-scrollbar-thumb {
    background: var(--tts-border);
    border-radius: 3px;
}

/* Message Bubbles */
.chat-message {
    display: flex;
    margin-bottom: 1rem;
    animation: message-in 0.3s ease;
}

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

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

.chat-message.assistant {
    justify-content: flex-start;
}

.chat-bubble {
    max-width: 75%;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    word-wrap: break-word;
    line-height: 1.5;
}

.chat-message.user .chat-bubble {
    background-color: #1a1a1a;
    color: #fff;
    border-bottom-right-radius: 0.25rem;
}

.chat-message.assistant .chat-bubble {
    background-color: #f0f0f2;
    border: 1px solid #e2e2e5;
    color: #333;
    border-bottom-left-radius: 0.25rem;
}

.chat-bubble .bubble-audio {
    margin-top: 0.5rem;
}

.chat-bubble .bubble-audio audio {
    height: 32px;
    width: 100%;
    max-width: 250px;
}

/* Recording Indicator */
.recording-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    background-color: #fff;
    border: 1px solid #e2e2e5;
    color: #555;
    font-size: 0.875rem;
    font-weight: 500;
}

.recording-dot {
    width: 10px;
    height: 10px;
    background-color: #c44040;
    border-radius: 50%;
    animation: recording-pulse 1.2s ease-in-out infinite;
}

@keyframes recording-pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.4;
        transform: scale(0.8);
    }
}

.recording-timer {
    font-variant-numeric: tabular-nums;
}

/* Voice Chat Input Area */
.voice-chat-input {
    padding: 1rem;
    border-top: 1px solid #e2e2e5;
    background-color: #fff;
}

.voice-chat-input .btn-record {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--tts-transition);
}

.voice-chat-input .btn-record.recording {
    background-color: #c44040;
    border-color: #c44040;
    color: #fff;
    animation: record-glow 1.5s ease infinite;
}

@keyframes record-glow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(196, 64, 64, 0.3);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(196, 64, 64, 0);
    }
}

/* =============================================================================
   FAQ Accordion
   ============================================================================= */
.accordion-item {
    background-color: #fff;
    border-color: #e2e2e5;
}

.accordion-button {
    background-color: #fff;
    color: #1a1a1a;
    box-shadow: none;
    font-weight: 500;
}

.accordion-button:not(.collapsed) {
    background-color: #fafafa;
    color: #1a1a1a;
    box-shadow: none;
}

.accordion-button::after {
    filter: none;
}

.accordion-button:not(.collapsed)::after {
    filter: none;
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.2rem rgba(110, 142, 250, 0.15);
}

.accordion-body {
    background-color: #fff;
    line-height: 1.7;
    color: #555;
}

/* =============================================================================
   Pricing Cards
   ============================================================================= */
.pricing-form .form-check-label {
    cursor: pointer;
    padding: 1.5rem;
    border: 2px solid #e2e2e5;
    border-radius: var(--tts-radius-lg);
    background-color: #fff;
    transition: border-color var(--tts-transition), box-shadow var(--tts-transition);
    display: block;
    text-align: center;
}

.pricing-form .form-check-input:checked + .form-check-label {
    border-color: #1a1a1a;
    box-shadow: 0 0 16px rgba(0, 0, 0, 0.06);
}

.pricing-form .price-value {
    font-size: 2rem;
    font-weight: 700;
}

/* =============================================================================
   API Documentation Page
   ============================================================================= */
.api-sidebar {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
}

.api-sidebar .nav-link {
    color: #6b6b6b;
    padding: 0.35rem 1rem;
    font-size: 0.875rem;
    border-left: 2px solid transparent;
}

.api-sidebar .nav-link:hover,
.api-sidebar .nav-link.active {
    color: #1a1a1a;
    border-left-color: #1a1a1a;
    background: transparent;
}

.api-sidebar .nav-section {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #999;
    padding: 0.75rem 1rem 0.25rem;
}

.api-section {
    padding-top: 1.5rem;
    margin-bottom: 2rem;
}

.method-badge {
    font-family: monospace;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
}

/* Inline code elements — readable on light background */
code {
    background-color: #f0f0f2;
    color: #c7254e;
    padding: 0.15rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.875em;
}

/* Code inside dark code blocks should not have the inline styling */
pre code,
.code-block code,
.api-code-block code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
    font-size: inherit;
}

/* Pre elements with text-light class — code blocks needing dark bg + light text */
pre.text-light {
    background-color: #1e1e2e !important;
    color: #e8e8e8 !important;
    border-radius: 0.375rem;
    overflow-x: auto;
}

/* Inside .code-block wrappers, parent provides background */
.code-block pre.text-light {
    background-color: transparent !important;
    border-radius: 0;
}

.code-block {
    background: #1e1e2e;
    border: 1px solid #e2e2e5;
    border-radius: 0.5rem;
    overflow: hidden;
}

.code-block .code-header {
    background: #2a2a3e;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid #3a3a4e;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.code-block .code-header small {
    color: #999 !important;
}

.code-block pre {
    padding: 1rem;
    margin: 0;
    font-size: 0.85rem;
    overflow-x: auto;
    color: #e8e8e8 !important;
}

.param-table td, .param-table th {
    font-size: 0.875rem;
}

.param-name {
    font-family: monospace;
    color: #e60000;
}

.param-type {
    font-family: monospace;
    color: #5b8dd9;
    font-size: 0.8rem;
}

.endpoint-url {
    font-family: monospace;
    background: #1e1e2e;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    border: 1px solid #e2e2e5;
    font-size: 0.9rem;
    color: #e8e8e8 !important;
}

/* Endpoint URL: ensure child text is visible on dark background */
.endpoint-url .text-light,
.endpoint-url .text-primary {
    color: #e8e8e8 !important;
}

.endpoint-url .text-secondary {
    color: #999 !important;
}

.api-docs-sidebar {
    position: sticky;
    top: 1rem;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
    padding-right: 1rem;
}

.api-docs-sidebar::-webkit-scrollbar {
    width: 4px;
}

.api-docs-sidebar::-webkit-scrollbar-thumb {
    background: var(--tts-border);
    border-radius: 2px;
}

.api-docs-sidebar .nav-link {
    color: var(--tts-text-secondary);
    padding: 0.375rem 0.75rem;
    border-left: 2px solid transparent;
    font-size: 0.875rem;
    transition: all var(--tts-transition);
    border-radius: 0;
}

.api-docs-sidebar .nav-link:hover {
    color: #1a1a1a;
    background-color: #f5f5f7;
}

.api-docs-sidebar .nav-link.active {
    color: #1a1a1a;
    border-left-color: #1a1a1a;
    background-color: #f5f5f7;
}

.api-docs-sidebar .nav-header {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--tts-text-secondary);
    padding: 0.75rem 0.75rem 0.25rem;
}

/* Code Blocks */
.api-code-block {
    background-color: #1e1e2e;
    border: 1px solid #e2e2e5;
    border-radius: var(--tts-radius);
    overflow: hidden;
}

.api-code-block .code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background-color: #2a2a3e;
    border-bottom: 1px solid #3a3a4e;
}

.api-code-block .code-header .code-lang {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: #999;
}

.api-code-block .code-copy-btn {
    background: none;
    border: none;
    color: #999;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    border-radius: var(--tts-radius);
    transition: all var(--tts-transition);
}

.api-code-block .code-copy-btn:hover {
    color: #ddd;
    background-color: rgba(255, 255, 255, 0.06);
}

.api-code-block .code-copy-btn.copied {
    color: #4a9e6a;
}

.api-code-block pre {
    margin: 0;
    padding: 1rem;
    font-size: 0.85rem;
    line-height: 1.6;
    overflow-x: auto;
    color: #e8e8e8 !important;
}

.api-code-block pre::-webkit-scrollbar {
    height: 6px;
}

.api-code-block pre::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 3px;
}

/* API Code Tab Navigation */
.api-code-tabs .nav-link {
    color: var(--tts-text-secondary);
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.api-code-tabs .nav-link:hover {
    color: #1a1a1a;
    border-bottom-color: #d0d0d4;
}

.api-code-tabs .nav-link.active {
    color: #1a1a1a;
    border-bottom-color: #1a1a1a;
    background: transparent;
}

/* API Try-It Section */
.api-try-it {
    background-color: #fff;
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius-lg);
    padding: 1.5rem;
}

.api-try-it .form-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--tts-text-secondary);
}

/* API Endpoint Badge */
.api-method {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-family: monospace;
}

.api-method.get { background-color: #eaf5ee; color: #2d7a48; }
.api-method.post { background-color: #e8f0fc; color: #3a6cb5; }
.api-method.put { background-color: #faf3e0; color: #8a6b1e; }
.api-method.delete { background-color: #fae8e8; color: #a03030; }

/* =============================================================================
   Syntax Highlighting (Code blocks) — keep dark for readability
   ============================================================================= */
code .text-info,
pre .text-info {
    color: #7ec8e3 !important;
}

code .text-success,
pre .text-success {
    color: #98c379 !important;
}

code .text-warning,
pre .text-warning {
    color: #e5c07b !important;
}

code .text-danger,
pre .text-danger {
    color: #e06c75 !important;
}

code .text-secondary,
pre .text-secondary {
    color: #5c6370 !important;
}

pre code .comment { color: #5c6370; font-style: italic; }
pre code .keyword { color: #c678dd; }
pre code .string { color: #98c379; }
pre code .function { color: #61afef; }
pre code .number { color: #d19a66; }
pre code .operator { color: #56b6c2; }
pre code .variable { color: #e06c75; }

/* =============================================================================
   Form Controls
   ============================================================================= */
.form-control,
.form-select {
    background-color: #fff;
    border-color: var(--tts-border);
    color: var(--tts-text);
    transition: border-color var(--tts-transition), box-shadow var(--tts-transition);
}

.form-control:focus,
.form-select:focus {
    background-color: #fff;
    border-color: #e60000;
    color: var(--tts-text);
    box-shadow: 0 0 0 0.2rem rgba(110, 142, 250, 0.15);
}

.form-control::placeholder {
    color: #aaa;
    opacity: 1;
}

.form-control:disabled,
.form-select:disabled {
    background-color: #f5f5f7;
    opacity: 0.6;
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.375rem;
}

.form-text {
    color: var(--tts-text-secondary);
}

.form-check-input {
    background-color: #fff;
    border-color: #d0d0d4;
}

.form-check-input:checked {
    background-color: #1a1a1a;
    border-color: #1a1a1a;
}

.input-group-text {
    background-color: #f5f5f7;
    border-color: var(--tts-border);
    color: var(--tts-text-secondary);
}

/* Payment form */
#card-element {
    border: 1px solid var(--tts-border);
    padding: 0.75rem;
    border-radius: 0.375rem;
    background-color: #fff;
}

/* =============================================================================
   Badges & Pills
   ============================================================================= */
.badge {
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge.bg-secondary {
    background-color: #e8e8ea !important;
    color: #555;
}

.badge.bg-dark {
    background-color: #f0f0f2 !important;
    color: #1a1a1a !important;
}

.badge-pill {
    border-radius: 50rem;
    padding: 0.35rem 0.75rem;
}

.badge-outline {
    background-color: transparent;
    border: 1px solid currentColor;
}

.badge-tier-free { background-color: #eaf5ee; color: #2d7a48; }
.badge-tier-standard { background-color: #e8f0fc; color: #3a6cb5; }
.badge-tier-premium { background-color: #faf3e0; color: #8a6b1e; }

/* =============================================================================
   Tables
   ============================================================================= */
.table-dark {
    --bs-table-bg: #fff;
    --bs-table-border-color: #e2e2e5;
    --bs-table-color: #1a1a1a;
    --bs-table-striped-bg: #f7f7f8;
    --bs-table-hover-bg: #f0f0f2;
}

.table-dark thead th {
    background-color: #f5f5f7;
    border-bottom-width: 2px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #888;
}

.table-hover > tbody > tr:hover {
    background-color: #f5f5f7;
}

.table td, .table th {
    vertical-align: middle;
}

/* =============================================================================
   Breadcrumb
   ============================================================================= */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--tts-text-secondary);
}

.breadcrumb-item a {
    text-decoration: none;
    transition: color var(--tts-transition);
}

.breadcrumb-item a:hover {
    color: #1a1a1a !important;
}

/* =============================================================================
   Footer — light grayscale
   ============================================================================= */
footer {
    background-color: #f0f0f2 !important;
    border-top: 1px solid #e2e2e5 !important;
    color: #555;
}

footer a.text-secondary {
    color: #6b6b6b !important;
    transition: color var(--tts-transition);
}

footer a.text-secondary:hover {
    color: #1a1a1a !important;
}

footer h5, footer h6 {
    letter-spacing: 0.01em;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    color: #1a1a1a;
}

footer p {
    color: #6b6b6b;
}

/* =============================================================================
   Alerts
   ============================================================================= */
.alert ul {
    margin: 0;
    padding-left: 1rem;
}

.alert-dark {
    background-color: #f0f0f2;
    border-color: #e2e2e5;
    color: #1a1a1a;
}

.alert-warning {
    background-color: #faf3e0;
    border-color: #e8d5a0;
    color: #6b5020;
}

.alert-info {
    background-color: #e8f0fc;
    border-color: #b8d0f0;
    color: #2a5090;
}

/* =============================================================================
   Loading States
   ============================================================================= */

/* Skeleton Screens */
.skeleton {
    background: linear-gradient(90deg,
        #f0f0f2 25%,
        #e2e2e5 50%,
        #f0f0f2 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease infinite;
    border-radius: var(--tts-radius);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5rem;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-heading {
    height: 1.5em;
    width: 40%;
    margin-bottom: 1rem;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.skeleton-card {
    height: 200px;
}

/* Spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: inherit;
}

/* Progress indicator for long operations */
.progress-bar-animated {
    background: linear-gradient(90deg, #d0d0d4, #f0f0f2, #d0d0d4);
    background-size: 200% 100%;
    animation: progress-flow 2s linear infinite;
}

@keyframes progress-flow {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Button loading state */
.btn .spinner-border {
    vertical-align: middle;
    margin-right: 0.5rem;
}

.btn.m-progress {
    position: relative;
    pointer-events: none;
    opacity: 0.75;
}

/* =============================================================================
   Cards - Global
   ============================================================================= */
.card {
    border-color: var(--tts-border);
    border-radius: var(--tts-radius-lg);
    background-color: #fff;
}

.card.bg-dark {
    background-color: #fff !important;
    border-color: #e8e8ea;
    color: #1a1a1a;
}

.card.bg-black {
    background-color: #1a1a1a !important;
    color: #fff;
}

.card-header {
    border-bottom-color: var(--tts-border);
}

/* Glass card variant */
.card-glass {
    background: rgba(255, 255, 255, 0.9) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid #e2e2e5;
}

/* =============================================================================
   Nav Pills / Tabs
   ============================================================================= */
.nav-pills .nav-link {
    color: var(--tts-text-secondary);
    transition: all var(--tts-transition);
    border-radius: var(--tts-radius);
}

.nav-pills .nav-link:hover {
    color: #1a1a1a;
    background-color: #f0f0f2;
}

.nav-pills .nav-link.active {
    background: #1a1a1a;
    color: #fff;
}

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

.text-gradient {
    color: #333 !important;
    -webkit-text-fill-color: #333;
}

/* Gradient text utility */
.text-glow {
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}

.border-glow {
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.04);
}

/* Credit cost display */
.credit-cost {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--tts-text-secondary);
}

.credit-cost .cost-value {
    font-weight: 700;
    color: var(--tts-warning);
}

/* Character counter */
.char-counter {
    font-size: 0.8rem;
    color: var(--tts-text-secondary);
    transition: color var(--tts-transition);
}

.char-counter.near-limit {
    color: var(--tts-warning);
}

.char-counter.at-limit {
    color: var(--tts-danger);
    font-weight: 600;
}

/* =============================================================================
   Modals
   ============================================================================= */
.modal-content {
    background-color: #fff;
    border-color: #e2e2e5;
}

.modal-header {
    border-bottom-color: #e2e2e5;
}

.modal-footer {
    border-top-color: #e2e2e5;
}

/* Modal dark variant (rate limit modal, etc.) */
.modal-content.bg-dark {
    background-color: #fff !important;
    color: #1a1a1a;
}

.modal-content.bg-dark .modal-header,
.modal-content.bg-dark .modal-footer {
    border-color: #e2e2e5;
}

.modal-content .btn-close-white {
    filter: none;
}

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

::-webkit-scrollbar-track {
    background: #f7f7f8;
}

::-webkit-scrollbar-thumb {
    background: #d0d0d4;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #aaa;
}

/* =============================================================================
   Responsive Adjustments
   ============================================================================= */
@media (max-width: 768px) {
    .display-4 {
        font-size: 2rem;
    }

    .display-5 {
        font-size: 1.75rem;
    }

    .hero-section {
        padding-top: 2rem !important;
        padding-bottom: 2rem !important;
    }

    .hero-section .hero-heading {
        font-size: 2rem;
    }

    .hero-section .hero-sub {
        font-size: 0.95rem;
    }

    .mega-dropdown {
        padding: 0.5rem !important;
    }

    .mega-dropdown .col-md-4 {
        margin-bottom: 0.5rem;
    }

    .mega-dropdown .dropdown-header {
        margin-top: 0.5rem;
    }

    .voice-chat-container {
        height: 400px;
        max-height: 60vh;
    }

    .chat-bubble {
        max-width: 85%;
    }

    .tool-card .display-5 {
        font-size: 2rem;
    }

    .api-docs-sidebar {
        position: static;
        max-height: none;
        margin-bottom: 1.5rem;
        border-bottom: 1px solid var(--tts-border);
        padding-bottom: 1rem;
    }

    .table-responsive {
        font-size: 0.85rem;
    }

    .pricing-form .price-value {
        font-size: 1.5rem;
    }

    .api-code-block pre {
        font-size: 0.75rem;
    }
}

@media (max-width: 576px) {
    .hero-section .d-flex.gap-4 {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem !important;
    }

    .btn-lg {
        width: 100%;
    }

    .pricing-form .row {
        flex-direction: column;
    }
}

/* =============================================================================
   Print Styles
   ============================================================================= */
@media print {
    .navbar, footer, .voice-chat-input, .btn {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .card {
        border: 1px solid #ccc;
        background: #fff !important;
    }
}

/* =============================================================================
   Smooth Transitions & Animations
   ============================================================================= */
.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Tab pane transition */
.tab-pane {
    animation: fadeIn 0.2s ease;
}

/* Tooltip overrides */
.tooltip-inner {
    background-color: #1a1a1a;
    color: #fff;
}

.bs-tooltip-auto[data-popper-placement^=top] .tooltip-arrow::before,
.bs-tooltip-top .tooltip-arrow::before {
    border-top-color: #1a1a1a;
}