/* ============================================================
   Text-to-Video Converter — app.css
   All rules scoped under .ttv-app to avoid conflicts with
   Google AdSense auto ads and other page elements.
   ============================================================ */

/* --- Hidden attribute fix (CSS display overrides [hidden]) --- */
.ttv-app [hidden] {
    display: none !important;
}

/* --- Design Tokens (scoped) --- */
.ttv-app {
    --ttv-primary: #6366F1;
    --ttv-primary-hover: #4F46E5;
    --ttv-primary-light: #EEF2FF;
    --ttv-primary-gradient: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --ttv-bg: #f8fafc;
    --ttv-surface: #ffffff;
    --ttv-text: #1e293b;
    --ttv-text-secondary: #64748b;
    --ttv-text-tertiary: #94a3b8;
    --ttv-border: #e2e8f0;
    --ttv-border-focus: #a5b4fc;
    --ttv-radius: 16px;
    --ttv-radius-sm: 10px;
    --ttv-shadow: 0 1px 3px rgba(0,0,0,.04), 0 1px 2px rgba(0,0,0,.03);
    --ttv-shadow-md: 0 4px 12px -2px rgba(0,0,0,.08), 0 2px 6px -2px rgba(0,0,0,.04);
    --ttv-shadow-lg: 0 12px 28px -6px rgba(0,0,0,.1), 0 4px 8px -4px rgba(0,0,0,.06);
    --ttv-success: #10b981;
    --ttv-success-bg: #ecfdf5;
    --ttv-error: #ef4444;
    --ttv-error-bg: #fef2f2;
    --ttv-warning: #f59e0b;
    --ttv-warning-bg: #fffbeb;
    --ttv-font: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

    font-family: var(--ttv-font);
    color: var(--ttv-text);
    background: var(--ttv-bg);
    line-height: 1.6;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px 40px;
    -webkit-text-size-adjust: 100%;
}

/* --- Main --- */
.ttv-app .ttv-main {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* --- Hero --- */
.ttv-app .ttv-hero {
    text-align: center;
    padding: 56px 16px 36px;
    background: linear-gradient(180deg, var(--ttv-primary-light) 0%, transparent 100%);
    border-radius: var(--ttv-radius);
    margin-bottom: 8px;
}

.ttv-app .ttv-eyebrow {
    display: inline-block;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--ttv-primary);
    margin: 0 0 12px;
}

.ttv-app .ttv-hero h1 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.15;
    margin: 0 0 8px;
    background: var(--ttv-primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ttv-app .ttv-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 500;
    color: var(--ttv-text-secondary);
    margin: 0 0 16px;
}

.ttv-app .ttv-hero-desc {
    max-width: 740px;
    margin: 0 auto 20px;
    color: var(--ttv-text-secondary);
    font-size: .95rem;
}

.ttv-app .ttv-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.ttv-app .ttv-pill {
    display: inline-block;
    padding: 5px 14px;
    background: var(--ttv-primary-light);
    color: var(--ttv-primary);
    border-radius: 100px;
    font-size: .8rem;
    font-weight: 600;
}

/* --- Panels --- */
.ttv-app .ttv-panel {
    background: var(--ttv-surface);
    border: 1px solid var(--ttv-border);
    border-radius: var(--ttv-radius);
    padding: 22px;
    box-shadow: var(--ttv-shadow);
    transition: box-shadow .2s ease, transform .2s ease;
}

.ttv-app .ttv-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.ttv-app .ttv-panel-head h2 {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
    color: var(--ttv-text);
}

.ttv-app .ttv-chip {
    display: inline-block;
    padding: 2px 10px;
    background: var(--ttv-primary-light);
    color: var(--ttv-primary);
    border-radius: 100px;
    font-size: .75rem;
    font-weight: 600;
    white-space: nowrap;
}

/* --- How to Use --- */
.ttv-app .ttv-howto {
    background: linear-gradient(135deg, var(--ttv-primary-light) 0%, #F5F3FF 100%);
    border-color: transparent;
}

.ttv-app .ttv-steps {
    margin: 0;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ttv-app .ttv-steps li {
    font-size: .92rem;
    color: var(--ttv-text-secondary);
    line-height: 1.55;
}

.ttv-app .ttv-steps li::marker {
    color: var(--ttv-primary);
    font-weight: 700;
}

/* --- Workspace Grid --- */
.ttv-app .ttv-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

.ttv-app .ttv-col-input,
.ttv-app .ttv-col-output {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* --- Textarea --- */
.ttv-app .ttv-textarea {
    display: block;
    width: 100%;
    min-height: 180px;
    padding: 12px 14px;
    border: 1px solid var(--ttv-border);
    border-radius: var(--ttv-radius-sm);
    font-family: var(--ttv-font);
    font-size: .93rem;
    line-height: 1.6;
    color: var(--ttv-text);
    background: var(--ttv-surface);
    resize: vertical;
    transition: border-color .15s;
    box-sizing: border-box;
}

.ttv-app .ttv-textarea:focus {
    outline: none;
    border-color: var(--ttv-border-focus);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}

.ttv-app .ttv-char-count {
    text-align: right;
    font-size: .78rem;
    color: var(--ttv-text-tertiary);
    margin-top: 4px;
}

/* --- Voice Search & Select --- */
.ttv-app .ttv-voice-search {
    display: block;
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--ttv-border);
    border-radius: var(--ttv-radius-sm) var(--ttv-radius-sm) 0 0;
    font-family: var(--ttv-font);
    font-size: .9rem;
    color: var(--ttv-text);
    background: var(--ttv-surface);
    box-sizing: border-box;
}

.ttv-app .ttv-voice-search:focus {
    outline: none;
    border-color: var(--ttv-border-focus);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}

.ttv-app .ttv-voice-select {
    display: block;
    width: 100%;
    border: 1px solid var(--ttv-border);
    border-top: none;
    border-radius: 0 0 var(--ttv-radius-sm) var(--ttv-radius-sm);
    font-family: var(--ttv-font);
    font-size: .85rem;
    color: var(--ttv-text);
    background: var(--ttv-surface);
    box-sizing: border-box;
    padding: 4px;
}

.ttv-app .ttv-voice-select:focus {
    outline: none;
    border-color: var(--ttv-border-focus);
}

.ttv-app .ttv-voice-select option {
    padding: 6px 10px;
}

.ttv-app .ttv-voice-select option:checked {
    background: var(--ttv-primary-light);
    color: var(--ttv-primary);
}

.ttv-app .ttv-voice-info {
    margin-top: 8px;
}

.ttv-app .ttv-meta-pill {
    display: inline-block;
    font-size: .82rem;
    color: var(--ttv-text-secondary);
}

/* --- Settings Grid --- */
.ttv-app .ttv-settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.ttv-app .ttv-setting {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ttv-app .ttv-setting-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ttv-app .ttv-setting-header label {
    font-size: .82rem;
    font-weight: 600;
    color: var(--ttv-text);
    flex: 1;
    white-space: nowrap;
}

.ttv-app .ttv-setting-val {
    font-size: .82rem;
    font-weight: 700;
    color: var(--ttv-primary);
    min-width: 36px;
    text-align: right;
}

.ttv-app .ttv-reset-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--ttv-text-tertiary);
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
    padding: 0;
    flex-shrink: 0;
}

.ttv-app .ttv-reset-btn:hover {
    background: var(--ttv-primary-light);
    color: var(--ttv-primary);
}

/* Range slider */
.ttv-app input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--ttv-border);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.ttv-app input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--ttv-primary);
    border: 2px solid var(--ttv-surface);
    box-shadow: 0 1px 3px rgba(0,0,0,.15);
    cursor: pointer;
}

.ttv-app input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--ttv-primary);
    border: 2px solid var(--ttv-surface);
    box-shadow: 0 1px 3px rgba(0,0,0,.15);
    cursor: pointer;
}

.ttv-app input[type="range"]:focus {
    outline: none;
}

.ttv-app input[type="range"]:disabled {
    opacity: .5;
    cursor: not-allowed;
}

/* Color row */
.ttv-app .ttv-color-row {
    grid-column: 1 / -1;
    flex-direction: row;
    gap: 16px;
}

.ttv-app .ttv-color-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.ttv-app .ttv-color-group label {
    font-size: .82rem;
    font-weight: 600;
    color: var(--ttv-text);
    white-space: nowrap;
}

.ttv-app input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    width: 42px;
    height: 32px;
    border: 1px solid var(--ttv-border);
    border-radius: 6px;
    padding: 2px;
    cursor: pointer;
    background: var(--ttv-surface);
}

.ttv-app input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.ttv-app input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

/* --- Select dropdown --- */
.ttv-app .ttv-select {
    display: block;
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--ttv-border);
    border-radius: var(--ttv-radius-sm);
    font-family: var(--ttv-font);
    font-size: .9rem;
    color: var(--ttv-text);
    background: var(--ttv-surface);
    box-sizing: border-box;
    cursor: pointer;
    transition: border-color .15s;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.ttv-app .ttv-select:focus {
    outline: none;
    border-color: var(--ttv-border-focus);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}

.ttv-app .ttv-select:disabled {
    opacity: .5;
    cursor: not-allowed;
}

/* --- Buttons --- */
.ttv-app .ttv-ghost-btn {
    border: none;
    background: transparent;
    color: var(--ttv-text-secondary);
    font-family: var(--ttv-font);
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 6px;
}

.ttv-app .ttv-ghost-btn:hover:not(:disabled) {
    background: var(--ttv-primary-light);
    color: var(--ttv-primary);
}

.ttv-app .ttv-ghost-btn:disabled {
    opacity: .4;
    cursor: not-allowed;
}

.ttv-app .ttv-action-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ttv-app .ttv-primary-btn {
    flex: 1;
    padding: 14px 28px;
    background: var(--ttv-primary-gradient);
    color: #fff;
    border: none;
    border-radius: var(--ttv-radius-sm);
    font-family: var(--ttv-font);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: opacity .15s, transform .1s, box-shadow .15s;
    box-shadow: var(--ttv-shadow-md);
}

.ttv-app .ttv-primary-btn:hover:not(:disabled) {
    opacity: .92;
    transform: translateY(-1px);
    box-shadow: var(--ttv-shadow-lg);
}

.ttv-app .ttv-primary-btn:active:not(:disabled) {
    transform: translateY(0);
}

.ttv-app .ttv-primary-btn:disabled {
    opacity: .5;
    cursor: not-allowed;
    transform: none;
}

.ttv-app .ttv-cancel-btn {
    padding: 14px 24px;
    background: transparent;
    color: var(--ttv-error);
    border: 2px solid var(--ttv-error);
    border-radius: var(--ttv-radius-sm);
    font-family: var(--ttv-font);
    font-size: .92rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s;
}

.ttv-app .ttv-cancel-btn:hover {
    background: var(--ttv-error-bg);
}

/* --- Status Panel --- */
.ttv-app .ttv-status-text {
    margin: 0;
    font-size: .9rem;
    color: var(--ttv-text-secondary);
    line-height: 1.6;
}

.ttv-app .ttv-progress {
    margin-top: 12px;
}

.ttv-app .ttv-progress-bar {
    height: 6px;
    background: var(--ttv-border);
    border-radius: 3px;
    overflow: hidden;
}

.ttv-app .ttv-progress-bar span {
    display: block;
    height: 100%;
    width: 30%;
    background: var(--ttv-primary);
    border-radius: 3px;
    animation: ttv-loading 1.6s ease-in-out infinite;
}

.ttv-app .ttv-progress-text {
    font-size: .82rem;
    color: var(--ttv-text-tertiary);
    margin: 6px 0 0;
}

.ttv-app .ttv-error-alert {
    margin-top: 12px;
    padding: 10px 14px;
    background: var(--ttv-error-bg);
    color: var(--ttv-error);
    border-radius: var(--ttv-radius-sm);
    font-size: .88rem;
    line-height: 1.5;
    border: 1px solid rgba(239,68,68,.15);
}

/* --- Output: Result Frames --- */
.ttv-app .ttv-result-frame {
    position: relative;
    min-height: 200px;
    background: #0f0f11;
    border-radius: var(--ttv-radius-sm);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ttv-app .ttv-audio-frame {
    min-height: 80px;
    background: var(--ttv-bg);
}

.ttv-app .ttv-video-player {
    display: block;
    width: 100%;
    max-height: 500px;
    border-radius: var(--ttv-radius-sm);
    background: #000;
}

.ttv-app .ttv-audio-player {
    display: block;
    width: 100%;
    padding: 12px;
    box-sizing: border-box;
}

.ttv-app .ttv-empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--ttv-text-tertiary);
}

.ttv-app .ttv-empty-audio {
    padding: 24px 20px;
}

.ttv-app .ttv-empty-icon {
    display: block;
    font-size: 2.5rem;
    margin-bottom: 10px;
    opacity: .5;
}

.ttv-app .ttv-empty-state strong {
    display: block;
    font-size: .95rem;
    margin-bottom: 4px;
    color: var(--ttv-text-secondary);
}

.ttv-app .ttv-empty-state p {
    margin: 0;
    font-size: .82rem;
}

.ttv-app .ttv-loading-state {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15,15,17,.85);
    z-index: 2;
}

.ttv-app .ttv-loading-card {
    text-align: center;
    padding: 28px 24px;
    color: #e2e8f0;
}

.ttv-app .ttv-loading-card strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 6px;
}

.ttv-app .ttv-loading-card p {
    margin: 0 0 16px;
    font-size: .85rem;
    color: #94a3b8;
}

.ttv-app .ttv-loading-bar {
    height: 4px;
    width: 200px;
    margin: 0 auto;
    background: rgba(255,255,255,.1);
    border-radius: 2px;
    overflow: hidden;
}

.ttv-app .ttv-loading-bar span {
    display: block;
    height: 100%;
    width: 40%;
    background: var(--ttv-primary);
    border-radius: 2px;
    animation: ttv-loading 1.6s ease-in-out infinite;
}

.ttv-app .ttv-download-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 14px;
    background: var(--ttv-success);
    color: #fff;
    text-decoration: none;
    border: none;
    border-radius: 100px;
    font-family: var(--ttv-font);
    font-size: .78rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, transform .1s;
}

.ttv-app .ttv-download-link:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* --- Warning Panel --- */
.ttv-app .ttv-warning-panel {
    background: var(--ttv-warning-bg);
    border-color: rgba(245,158,11,.2);
}

.ttv-app .ttv-warning-content {
    font-size: .9rem;
    color: #92400e;
    line-height: 1.6;
}

/* --- Features Grid --- */
.ttv-app .ttv-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.ttv-app .ttv-feature-card {
    padding: 18px;
    background: var(--ttv-bg);
    border-radius: var(--ttv-radius-sm);
    border: 1px solid var(--ttv-border);
    transition: transform .2s ease, box-shadow .2s ease;
}

.ttv-app .ttv-feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--ttv-shadow-md);
}

.ttv-app .ttv-feature-card h3 {
    font-size: .92rem;
    font-weight: 700;
    margin: 0 0 6px;
    color: var(--ttv-text);
}

.ttv-app .ttv-feature-icon {
    margin-right: 4px;
}

.ttv-app .ttv-feature-card p {
    margin: 0;
    font-size: .82rem;
    color: var(--ttv-text-secondary);
    line-height: 1.55;
}

/* --- Notes Grid --- */
.ttv-app .ttv-notes-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.ttv-app .ttv-notes-list {
    margin: 0;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ttv-app .ttv-notes-list li {
    font-size: .88rem;
    color: var(--ttv-text-secondary);
    line-height: 1.55;
}

.ttv-app .ttv-notes-list li::marker {
    color: var(--ttv-primary);
}

/* --- Links Section --- */
.ttv-app .ttv-links-desc {
    margin: 0 0 12px;
    font-size: .9rem;
    color: var(--ttv-text-secondary);
}

.ttv-app .ttv-links-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.ttv-app .ttv-links-row a {
    display: inline-block;
    padding: 8px 18px;
    border: 1px solid var(--ttv-border);
    border-radius: 100px;
    text-decoration: none;
    font-size: .85rem;
    font-weight: 600;
    color: var(--ttv-primary);
    transition: background .15s, border-color .15s;
}

.ttv-app .ttv-links-row a:hover {
    background: var(--ttv-primary-light);
    border-color: var(--ttv-primary);
}

/* --- Footer --- */
.ttv-app .ttv-footer {
    text-align: center;
    padding: 28px 0 0;
    border-top: 1px solid var(--ttv-border);
    margin-top: 12px;
}

.ttv-app .ttv-footer p {
    margin: 0;
    font-size: .82rem;
    color: var(--ttv-text-tertiary);
}

.ttv-app .ttv-footer a {
    color: var(--ttv-primary);
    text-decoration: none;
}

.ttv-app .ttv-footer a:hover {
    text-decoration: underline;
}

/* --- Keyframes --- */
@keyframes ttv-loading {
    0%   { transform: translateX(-120%); }
    50%  { transform: translateX(100%); }
    100% { transform: translateX(350%); }
}

/* --- Responsive: tablet (≤960px) --- */
@media (max-width: 960px) {
    .ttv-app .ttv-workspace {
        grid-template-columns: 1fr;
    }

    .ttv-app .ttv-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ttv-app .ttv-notes-grid {
        grid-template-columns: 1fr;
    }
}

/* --- Responsive: mobile (≤600px) --- */
@media (max-width: 600px) {
    .ttv-app {
        padding: 0 12px 32px;
    }

    .ttv-app .ttv-hero {
        padding: 32px 8px 20px;
    }

    .ttv-app .ttv-panel {
        padding: 16px;
    }

    .ttv-app .ttv-settings-grid {
        grid-template-columns: 1fr;
    }

    .ttv-app .ttv-color-row {
        flex-direction: column;
    }

    .ttv-app .ttv-features-grid {
        grid-template-columns: 1fr;
    }

    .ttv-app .ttv-action-row {
        flex-direction: column;
    }

    .ttv-app .ttv-primary-btn,
    .ttv-app .ttv-cancel-btn {
        width: 100%;
    }
}