/* Twilio Paste Design Tokens */
:root {
    /* Colors - Gray Scale */
    --color-gray-0: #ffffff;
    --color-gray-10: #f4f4f6;
    --color-gray-20: #e1e3ea;
    --color-gray-30: #cacdd8;
    --color-gray-40: #aeb2c1;
    --color-gray-50: #8891aa;
    --color-gray-60: #606b85;
    --color-gray-70: #4a5568;
    --color-gray-80: #3c4257;
    --color-gray-90: #2d3748;
    --color-gray-100: #121c2d;

    /* Colors - Blue Scale */
    --color-blue-10: #e8f1fc;
    --color-blue-20: #bedaff;
    --color-blue-30: #7fb5ff;
    --color-blue-40: #4d9aff;
    --color-blue-50: #1a7eff;
    --color-blue-60: #0263e0;
    --color-blue-70: #0050b3;

    /* Colors - Green Scale */
    --color-green-10: #e6f7ed;
    --color-green-20: #b3e6c7;
    --color-green-50: #14b053;
    --color-green-60: #0e8a41;

    /* Colors - Orange Scale */
    --color-orange-10: #fff3e6;
    --color-orange-20: #ffd9b3;
    --color-orange-50: #f57c00;
    --color-orange-60: #d66a00;

    /* Colors - Purple Scale */
    --color-purple-10: #f3e8ff;
    --color-purple-20: #dbc1ff;
    --color-purple-50: #8b5cf6;
    --color-purple-60: #7c3aed;

    /* Spacing Scale */
    --space-0: 0;
    --space-10: 0.125rem;  /* 2px */
    --space-20: 0.25rem;   /* 4px */
    --space-30: 0.5rem;    /* 8px */
    --space-40: 0.75rem;   /* 12px */
    --space-50: 1rem;      /* 16px */
    --space-60: 1.5rem;    /* 24px */
    --space-70: 2rem;      /* 32px */
    --space-80: 2.5rem;    /* 40px */
    --space-90: 3rem;      /* 48px */
    --space-100: 4rem;     /* 64px */

    /* Typography */
    --font-family-text: 'Inter var', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-family-display: 'TwilioSansMono', 'Fira Code', 'Consolas', monospace;

    --font-size-xs: 0.75rem;   /* 12px */
    --font-size-sm: 0.875rem;  /* 14px */
    --font-size-md: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;  /* 18px */
    --font-size-xl: 1.25rem;   /* 20px */
    --font-size-2xl: 1.5rem;   /* 24px */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-dropdown: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);

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

    /* Layout */
    --sidebar-width: 320px;
    --header-height: 72px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-text);
    font-size: var(--font-size-md);
    line-height: var(--line-height-normal);
    color: var(--color-gray-90);
    background-color: var(--color-gray-10);
    min-height: 100vh;
}

/* Header */
.header {
    background-color: var(--color-gray-0);
    border-bottom: 1px solid var(--color-gray-20);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--space-60);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--space-40);
}

.header-logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-text {
    display: flex;
    flex-direction: column;
}

.header-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-100);
    line-height: var(--line-height-tight);
}

.header-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-60);
    margin-top: var(--space-10);
}

/* Main Layout */
.main-layout {
    display: flex;
    max-width: 1600px;
    margin: 0 auto;
    min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    padding: var(--space-60);
    background-color: var(--color-gray-0);
    border-right: 1px solid var(--color-gray-20);
    overflow-y: auto;
    height: calc(100vh - var(--header-height));
    position: sticky;
    top: var(--header-height);
}

.sidebar-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-50);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-40);
    border-bottom: 1px solid var(--color-gray-20);
}

.sidebar-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-90);
}

.clear-filters-btn {
    font-family: var(--font-family-text);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-blue-60);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-20) var(--space-30);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.clear-filters-btn:hover {
    background-color: var(--color-blue-10);
}

.clear-filters-btn:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

/* Filter Sections */
.filter-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-30);
}

.filter-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-70);
}

.filter-heading {
    font-family: var(--font-family-display);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-80);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.filter-input {
    font-family: var(--font-family-text);
    font-size: var(--font-size-md);
    padding: var(--space-30) var(--space-40);
    border: 1px solid var(--color-gray-30);
    border-radius: var(--radius-md);
    background-color: var(--color-gray-0);
    color: var(--color-gray-90);
    width: 100%;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.filter-input::placeholder {
    color: var(--color-gray-50);
}

.filter-input:focus {
    outline: none;
    border-color: var(--color-blue-50);
    box-shadow: 0 0 0 3px var(--color-blue-10);
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-30);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-30);
    cursor: pointer;
    padding: var(--space-20) 0;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--color-blue-60);
}

.checkbox-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-80);
}

.checkbox-label:hover .checkbox-text {
    color: var(--color-gray-100);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--space-60);
    min-width: 0;
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-60);
}

.results-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-100);
}

.results-count {
    font-size: var(--font-size-sm);
    color: var(--color-gray-60);
    background-color: var(--color-gray-20);
    padding: var(--space-20) var(--space-40);
    border-radius: var(--radius-full);
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-100);
    color: var(--color-gray-60);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-20);
    border-top-color: var(--color-blue-60);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-50);
}

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

/* Error State */
.error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-100);
    text-align: center;
}

.error-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-orange-10);
    color: var(--color-orange-60);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-50);
}

.error-state h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-90);
    margin-bottom: var(--space-30);
}

.error-state p {
    color: var(--color-gray-60);
    margin-bottom: var(--space-50);
}

.retry-btn {
    font-family: var(--font-family-text);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-0);
    background-color: var(--color-blue-60);
    border: none;
    padding: var(--space-30) var(--space-60);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.retry-btn:hover {
    background-color: var(--color-blue-70);
}

.retry-btn:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-100);
    text-align: center;
}

.empty-icon {
    color: var(--color-gray-40);
    margin-bottom: var(--space-50);
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-90);
    margin-bottom: var(--space-30);
}

.empty-state p {
    color: var(--color-gray-60);
    margin-bottom: var(--space-50);
}

/* Voice Grid */
.voice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-60);
}

/* Voice Card */
.card {
    background-color: var(--color-gray-0);
    border: 1px solid var(--color-gray-20);
    border-radius: var(--radius-md);
    padding: var(--space-70);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    cursor: default;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-blue-30);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-50);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-blue-50), var(--color-purple-50));
    color: var(--color-gray-0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
}

.card-status {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    padding: var(--space-10) var(--space-30);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-neural {
    background-color: var(--color-green-10);
    color: var(--color-green-60);
}

.status-generative {
    background-color: var(--color-purple-10);
    color: var(--color-purple-60);
}

.card-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-100);
    margin-bottom: var(--space-30);
}

.card-description {
    font-size: var(--font-size-sm);
    color: var(--color-gray-60);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-50);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-metadata {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-40);
    padding: var(--space-40) 0;
    border-top: 1px solid var(--color-gray-20);
    border-bottom: 1px solid var(--color-gray-20);
    margin-bottom: var(--space-40);
}

.metadata-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-10);
}

.metadata-label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metadata-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-80);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-20);
}

.tag {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-70);
    background-color: var(--color-gray-10);
    padding: var(--space-10) var(--space-30);
    border-radius: var(--radius-full);
}

/* Provider Badge */
.card-provider {
    display: flex;
    align-items: center;
    gap: var(--space-20);
    margin-bottom: var(--space-30);
}

.provider-badge {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    padding: var(--space-10) var(--space-30);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.provider-twilio {
    background-color: var(--color-blue-10);
    color: var(--color-blue-60);
}

.provider-polly {
    background-color: var(--color-orange-10);
    color: var(--color-orange-60);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
        border-right: none;
        border-bottom: 1px solid var(--color-gray-20);
    }

    .sidebar-content {
        max-width: 600px;
        margin: 0 auto;
    }

    .voice-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 640px) {
    .header-content {
        padding: 0 var(--space-40);
    }

    .sidebar {
        padding: var(--space-40);
    }

    .main-content {
        padding: var(--space-40);
    }

    .voice-grid {
        grid-template-columns: 1fr;
    }

    .card-metadata {
        grid-template-columns: 1fr;
        gap: var(--space-30);
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-30);
    }
}

/* Hidden utility */
[hidden] {
    display: none !important;
}

/* ========================================
   Card Actions & Buttons
   ======================================== */
.card-actions {
    display: flex;
    gap: var(--space-30);
    margin-top: var(--space-50);
    padding-top: var(--space-40);
    border-top: 1px solid var(--color-gray-20);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-20);
    font-family: var(--font-family-text);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    padding: var(--space-30) var(--space-40);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-icon {
    flex-shrink: 0;
}

.btn-primary {
    background-color: var(--color-blue-60);
    color: var(--color-gray-0);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-blue-70);
}

.btn-primary:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

.btn-secondary {
    background-color: var(--color-gray-10);
    color: var(--color-gray-80);
    border: 1px solid var(--color-gray-30);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-gray-20);
    border-color: var(--color-gray-40);
}

.btn-secondary:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

.play-sample-btn,
.preview-script-btn {
    flex: 1;
}

/* Voice card playing state */
.voice-card.is-playing {
    border-color: var(--color-blue-50);
    box-shadow: 0 0 0 3px var(--color-blue-10);
}

.voice-card.is-playing .card-icon {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* ========================================
   Script Workspace
   ======================================== */
.script-workspace {
    width: 320px;
    flex-shrink: 0;
    padding: var(--space-60);
    background-color: var(--color-gray-0);
    border-left: 1px solid var(--color-gray-20);
    height: calc(100vh - var(--header-height) - 80px);
    position: sticky;
    top: var(--header-height);
    display: flex;
    flex-direction: column;
}

.workspace-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-40);
    padding-bottom: var(--space-40);
    border-bottom: 1px solid var(--color-gray-20);
}

.workspace-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-90);
}

.credentials-status {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
    padding: var(--space-10) var(--space-30);
    background-color: var(--color-gray-10);
    border-radius: var(--radius-full);
}

.credentials-status.has-credentials {
    background-color: var(--color-green-10);
    color: var(--color-green-60);
}

.workspace-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.script-textarea {
    flex: 1;
    min-height: 200px;
    font-family: var(--font-family-text);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    padding: var(--space-40);
    border: 1px solid var(--color-gray-30);
    border-radius: var(--radius-md);
    resize: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.script-textarea::placeholder {
    color: var(--color-gray-50);
}

.script-textarea:focus {
    outline: none;
    border-color: var(--color-blue-50);
    box-shadow: 0 0 0 3px var(--color-blue-10);
}

.workspace-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-30);
}

.char-counter {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
}

.char-counter.near-limit {
    color: var(--color-orange-50);
}

.char-counter.at-limit {
    color: var(--color-orange-60);
    font-weight: var(--font-weight-medium);
}

.workspace-btn {
    font-family: var(--font-family-text);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-60);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-20) var(--space-30);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.workspace-btn:hover {
    background-color: var(--color-gray-10);
    color: var(--color-gray-80);
}

.workspace-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
    margin-top: var(--space-40);
    line-height: var(--line-height-relaxed);
}

/* ========================================
   Audio Player
   ======================================== */
.audio-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background-color: var(--color-gray-90);
    border-top: 1px solid var(--color-gray-80);
    display: flex;
    align-items: center;
    padding: 0 var(--space-60);
    gap: var(--space-60);
    z-index: 200;
}

.player-info {
    flex: 0 0 200px;
}

.now-playing {
    display: flex;
    flex-direction: column;
    gap: var(--space-10);
}

.now-playing-label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.now-playing-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-0);
}

.now-playing-provider {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
}

.player-controls {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-50);
}

.play-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-gray-0);
    color: var(--color-gray-90);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.play-btn:hover:not(:disabled) {
    transform: scale(1.05);
    background-color: var(--color-gray-10);
}

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

.audio-loading {
    position: absolute;
}

.loading-spinner.small {
    width: 20px;
    height: 20px;
    border-width: 2px;
    margin-bottom: 0;
}

.progress-container {
    display: flex;
    align-items: center;
    gap: var(--space-30);
    flex: 1;
    max-width: 500px;
}

.time-display {
    font-family: var(--font-family-display);
    font-size: var(--font-size-xs);
    color: var(--color-gray-40);
    min-width: 40px;
}

.progress-bar {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-gray-70);
    border-radius: var(--radius-full);
    cursor: pointer;
}

.progress-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-0);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.progress-bar::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.progress-bar::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-0);
    cursor: pointer;
    border: none;
}

.player-volume {
    flex: 0 0 150px;
    display: flex;
    align-items: center;
    gap: var(--space-30);
}

.volume-icon {
    color: var(--color-gray-40);
    display: flex;
    align-items: center;
}

.volume-slider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-gray-70);
    border-radius: var(--radius-full);
    cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-0);
    cursor: pointer;
}

.volume-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-0);
    cursor: pointer;
    border: none;
}

.audio-error {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-orange-60);
    color: var(--color-gray-0);
    padding: var(--space-30) var(--space-50);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    margin-bottom: var(--space-30);
    white-space: nowrap;
}

.audio-error.is-visible {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Credentials Modal
   ======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-gray-0);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    padding: var(--space-70);
    box-shadow: var(--shadow-dropdown);
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal-overlay.is-visible .modal-content {
    transform: scale(1);
}

.modal-header {
    margin-bottom: var(--space-60);
}

.modal-title {
    font-family: var(--font-family-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-100);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-50);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-20);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-80);
}

.form-input {
    font-family: var(--font-family-text);
    font-size: var(--font-size-md);
    padding: var(--space-30) var(--space-40);
    border: 1px solid var(--color-gray-30);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-gray-50);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-blue-50);
    box-shadow: 0 0 0 3px var(--color-blue-10);
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-50);
}

.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-orange-60);
    background-color: var(--color-orange-10);
    padding: var(--space-30) var(--space-40);
    border-radius: var(--radius-md);
}

.modal-warning {
    display: flex;
    align-items: flex-start;
    gap: var(--space-30);
    padding: var(--space-40);
    background-color: var(--color-blue-10);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-blue-70);
}

.modal-warning svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.modal-actions {
    display: flex;
    gap: var(--space-30);
    justify-content: flex-end;
    margin-top: var(--space-30);
}

.modal-footer {
    margin-top: var(--space-50);
    padding-top: var(--space-50);
    border-top: 1px solid var(--color-gray-20);
    text-align: center;
}

.forget-link {
    font-size: var(--font-size-sm);
    color: var(--color-gray-50);
    text-decoration: none;
}

.forget-link:hover {
    color: var(--color-gray-70);
    text-decoration: underline;
}

/* ========================================
   Layout adjustments for audio player
   ======================================== */
body {
    padding-bottom: 80px; /* Space for audio player */
}

.main-layout {
    min-height: calc(100vh - var(--header-height) - 80px);
}

.sidebar {
    height: calc(100vh - var(--header-height) - 80px);
}

/* ========================================
   Responsive adjustments for new components
   ======================================== */
@media (max-width: 1200px) {
    .script-workspace {
        display: none; /* Hide on smaller screens */
    }
}

@media (max-width: 1024px) {
    .audio-player {
        padding: 0 var(--space-40);
        gap: var(--space-40);
    }

    .player-info {
        flex: 0 0 150px;
    }

    .player-volume {
        flex: 0 0 100px;
    }

    .progress-container {
        max-width: 300px;
    }
}

@media (max-width: 768px) {
    .audio-player {
        height: 100px;
        flex-wrap: wrap;
        padding: var(--space-30) var(--space-40);
    }

    .player-info {
        order: 1;
        flex: 1;
    }

    .player-volume {
        order: 2;
        flex: 0 0 auto;
    }

    .player-controls {
        order: 3;
        flex: 0 0 100%;
        justify-content: center;
    }

    .progress-container {
        max-width: 100%;
        flex: 1;
    }

    body {
        padding-bottom: 100px;
    }

    .main-layout {
        min-height: calc(100vh - var(--header-height) - 100px);
    }

    .sidebar {
        height: auto;
    }
}

@media (max-width: 640px) {
    .card-actions {
        flex-direction: column;
    }

    .play-sample-btn,
    .preview-script-btn {
        width: 100%;
    }

    .modal-content {
        margin: var(--space-40);
        padding: var(--space-50);
    }

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

    .modal-actions .btn {
        width: 100%;
    }
}

/* ========================================
   Export Modal
   ======================================== */
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.export-modal-content {
    max-width: 800px;
    position: relative;
}

.export-modal-content .modal-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-20);
    padding-right: var(--space-80);
}

.export-voice-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-60);
    font-weight: var(--font-weight-normal);
}

.modal-close-btn {
    position: absolute;
    top: var(--space-60);
    right: var(--space-60);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-gray-50);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.modal-close-btn:hover {
    background-color: var(--color-gray-10);
    color: var(--color-gray-80);
}

.modal-close-btn:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

/* Export Tabs */
.export-tabs {
    display: flex;
    gap: var(--space-10);
    margin-bottom: var(--space-50);
    border-bottom: 1px solid var(--color-gray-20);
    padding-bottom: var(--space-30);
}

.export-tab {
    font-family: var(--font-family-text);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-60);
    background: none;
    border: none;
    padding: var(--space-30) var(--space-40);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.export-tab:hover {
    background-color: var(--color-gray-10);
    color: var(--color-gray-80);
}

.export-tab.active {
    background-color: var(--color-blue-10);
    color: var(--color-blue-60);
}

.export-tab:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

/* Export Code Container */
.export-code-container {
    position: relative;
    background-color: #2d3748;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.export-code-block {
    margin: 0;
    padding: var(--space-50);
    padding-top: var(--space-80);
    max-height: 400px;
    overflow: auto;
    font-family: var(--font-family-display);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    background-color: transparent;
}

.export-code-block code {
    background: none;
    padding: 0;
    font-size: inherit;
}

/* Export Copy Button */
.export-copy-btn {
    position: absolute;
    top: var(--space-30);
    right: var(--space-30);
    display: flex;
    align-items: center;
    gap: var(--space-20);
    font-family: var(--font-family-text);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-40);
    background-color: var(--color-gray-80);
    border: none;
    padding: var(--space-20) var(--space-30);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    z-index: 10;
}

.export-copy-btn:hover {
    background-color: var(--color-gray-70);
    color: var(--color-gray-0);
}

.export-copy-btn.success {
    background-color: var(--color-green-60);
    color: var(--color-gray-0);
}

.export-copy-btn:focus {
    outline: 2px solid var(--color-blue-50);
    outline-offset: 2px;
}

/* Export Loading State */
.export-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-30);
    padding: var(--space-80);
    color: var(--color-gray-40);
}

.export-loading .loading-spinner {
    border-color: var(--color-gray-70);
    border-top-color: var(--color-gray-40);
}

/* Responsive Export Modal */
@media (max-width: 768px) {
    .export-modal-content {
        max-width: 100%;
        margin: var(--space-40);
    }

    .export-tabs {
        flex-wrap: wrap;
    }

    .export-tab {
        flex: 1;
        min-width: 80px;
        text-align: center;
    }

    .export-code-block {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    .export-tabs {
        flex-direction: column;
    }

    .export-tab {
        width: 100%;
    }

    .export-code-block {
        padding: var(--space-40);
        padding-top: var(--space-70);
        max-height: 250px;
    }
}