/* ============================================
   GIF Speed Changer - Stylesheet
   SURITD TOOLS design system
   Dark mode support - light mode default
   ============================================ */

/* CSS Variables - Light Mode */
:root {
    --tool-primary: #3399cc;
    --tool-primary-light: rgba(51, 153, 204, 0.1);
    --tool-primary-dark: #2980b9;
    --tool-fast: #339966;
    --tool-normal: #3399cc;
    --tool-slow: #9b59b6;

    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08);

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --success: #339966;
    --success-light: rgba(51, 153, 102, 0.1);
    --danger: #e64e4e;
}

/* Dark Mode */
[data-theme="dark"] {
    --tool-primary: #60a5fa;
    --tool-primary-light: rgba(96, 165, 250, 0.12);
    --tool-primary-dark: #3b82f6;
    --tool-fast: #4ade80;
    --tool-normal: #60a5fa;
    --tool-slow: #a78bfa;

    --bg: #0f172a;
    --bg-elevated: #1e293b;
    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border: rgba(255,255,255,0.1);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.4);

    --success: #4ade80;
    --success-light: rgba(74, 222, 128, 0.12);
    --danger: #f87171;
}

/* Base */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* Container */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-icon-wrapper {
    width: 64px;
    height: 64px;
    background: var(--tool-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg);
    flex-shrink: 0;
}

.tool-icon-wrapper svg,
.tool-icon-wrapper i {
    width: 28px;
    height: 28px;
}

.tool-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin: 0;
    color: var(--tool-primary);
    letter-spacing: -0.02em;
}

.tool-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.tool-description a {
    color: var(--tool-primary);
    text-decoration: none;
}

.tool-description a:hover {
    text-decoration: underline;
}

/* Main Tool Area */
.tool-main {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: visible;
    border: 1px solid var(--border);
}

/* Upload Section */
.upload-section {
    padding: 3rem;
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--tool-primary);
    background: var(--tool-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-content {
    position: relative;
    z-index: 1;
}

.upload-icon {
    color: var(--tool-primary);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.upload-area:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 0.5rem;
}

.upload-subtitle {
    color: var(--text-secondary);
    margin: 0 0 1rem;
    font-size: 1rem;
}

.upload-hint {
    display: inline-block;
    background: var(--bg-elevated);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    border: 1px solid var(--border);
}

/* Editor Section */
.editor-section {
    padding: 0;
    position: relative;
}

/* File Info Bar */
.file-info-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 1.25rem 2rem;
    background: var(--tool-primary-light);
    border-bottom: 1px solid var(--border);
}

.file-info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.file-info-item svg,
.file-info-item i {
    color: var(--tool-primary);
    flex-shrink: 0;
}

/* Editor Grid */
.editor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

/* Panels */
.preview-panel,
.controls-panel {
    padding: 2rem;
}

.preview-panel {
    background: var(--bg);
    border-right: 1px solid var(--border);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.panel-header h3 svg,
.panel-header h3 i {
    color: var(--tool-primary);
}

/* Preview Container */
.preview-container {
    position: relative;
}

.preview-wrapper {
    position: relative;
    background: 
        linear-gradient(45deg, var(--border) 25%, transparent 25%),
        linear-gradient(-45deg, var(--border) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--border) 75%),
        linear-gradient(-45deg, transparent 75%, var(--border) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    border: 1px solid var(--border);
}

.preview-wrapper img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
}

/* Speed Mode Tabs */
.resize-mode-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.mode-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-tab:hover {
    border-color: var(--tool-primary);
    color: var(--tool-primary);
}

.mode-tab.active {
    border-color: var(--tool-primary);
    background: var(--tool-primary-light);
    color: var(--tool-primary);
}

.mode-tab svg,
.mode-tab i {
    flex-shrink: 0;
}

/* Speed Controls */
.speed-controls {
    margin-bottom: 1.5rem;
}

/* Speed Presets */
.speed-presets {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.preset-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.preset-group-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

.preset-group-label svg,
.preset-group-label i {
    color: var(--tool-primary);
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.preset-btn {
    padding: 0.75rem 0.5rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.preset-btn.fast:hover,
.preset-btn.fast.active {
    border-color: var(--tool-fast);
    background: rgba(51, 153, 102, 0.1);
    color: var(--tool-fast);
}

.preset-btn.slow:hover,
.preset-btn.slow.active {
    border-color: var(--tool-slow);
    background: rgba(155, 89, 182, 0.1);
    color: var(--tool-slow);
}

.preset-btn.active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Control Group */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group.full-width {
    width: 100%;
}

.control-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

/* Percentage Slider */
.percentage-slider-wrapper {
    margin-bottom: 1rem;
}

.slider-input {
    -webkit-appearance: none;
    width: 100%;
    height: 12px;
    border-radius: var(--radius-full);
    outline: none;
    transition: all 0.2s ease;
    margin: 0.5rem 0;
    background: var(--border);
}

.slider-input.speed-slider {
    background: linear-gradient(to right, var(--tool-slow), var(--tool-normal), var(--tool-fast));
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 3px solid var(--tool-primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.2s ease;
}

.slider-input::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.slider-input::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 3px solid var(--tool-primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Percentage Input Row */
.percentage-input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-with-buttons {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.resize-input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    color: var(--text);
    background: var(--bg-elevated);
    transition: all 0.2s ease;
    min-width: 0;
}

.resize-input:focus {
    outline: none;
    border-color: var(--tool-primary);
    box-shadow: 0 0 0 3px var(--tool-primary-light);
}

.btn-adjust {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
    background: var(--bg);
    color: var(--tool-primary);
}

.btn-adjust:hover {
    background: var(--tool-primary);
    border-color: var(--tool-primary);
    color: white;
}

.percentage-symbol {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Speed Summary */
.speed-summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--bg);
    border-radius: var(--radius-lg);
    margin-top: 1rem;
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
}

.summary-item.highlight,
.summary-item.highlighted {
    background: var(--tool-primary-light);
    border: 2px solid var(--tool-primary);
}

.summary-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.summary-item.highlight .summary-value,
.summary-item.highlighted .summary-value {
    color: var(--tool-primary);
}

.summary-arrow {
    color: var(--tool-primary);
}

/* Action Bar */
.action-bar {
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    background: var(--bg);
    border-top: 1px solid var(--border);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
}

.btn svg,
.btn i {
    flex-shrink: 0;
}

.btn-primary {
    background: var(--tool-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(51, 153, 204, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(51, 153, 204, 0.4);
    filter: brightness(1.1);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg);
    color: var(--text-secondary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--text-muted);
    color: var(--text);
}

.btn-outline {
    background: transparent;
    color: var(--tool-primary);
    border: 2px solid var(--tool-primary);
}

.btn-outline:hover {
    background: var(--tool-primary);
    color: white;
}

/* Processing Overlay */
/* ── Analyzer-style Processing Overlay ──────────────────────────── */
.gsc-processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}
.gsc-processing-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: 2rem 2.5rem;
    text-align: center;
    box-shadow: 0 25px 60px rgba(0,0,0,0.35);
    min-width: 300px;
    max-width: 380px;
    width: 90%;
    border: 1px solid var(--border);
    transition: background-color .25s, border-color .25s;
}
.gsc-stage-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}
.gsc-stage-dot {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .3rem;
    color: var(--text-muted);
    transition: color .3s;
    flex-shrink: 0;
}
.gsc-stage-icon {
    width: 20px; height: 20px;
    padding: 7px;
    background: var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .3s;
    box-sizing: content-box;
}
.gsc-stage-icon svg { width: 16px; height: 16px; display: block; stroke: currentColor; }
.gsc-stage-dot span { font-size: .62rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em; white-space: nowrap; }
.gsc-stage-dot.active .gsc-stage-icon { background: var(--tool-primary); color: #fff; }
.gsc-stage-dot.active  { color: var(--tool-primary); }
.gsc-stage-dot.done .gsc-stage-icon  { background: var(--success); color: #fff; }
.gsc-stage-dot.done    { color: var(--success); }
.gsc-stage-connector { width: 22px; height: 2px; background: var(--border); margin: 0 .2rem 1.1rem; flex-shrink: 0; }
.gsc-css-spinner {
    width: 44px; height: 44px;
    border: 4px solid var(--border);
    border-top-color: var(--tool-primary);
    border-radius: 50%;
    animation: gsc-spin .8s linear infinite;
    margin: 0 auto 1.25rem;
}
@keyframes gsc-spin { to { transform: rotate(360deg); } }
.gsc-processing-status { font-size: .9rem; font-weight: 500; color: var(--text); margin: 0 0 .875rem; min-height: 1.3em; }
.gsc-progress-bar-wrap { height: 6px; background: var(--border); border-radius: var(--radius-full); overflow: hidden; margin-bottom: .5rem; }
.gsc-progress-bar-fill { height: 100%; background: var(--tool-primary); width: 0%; transition: width .4s ease; border-radius: var(--radius-full); }
.gsc-progress-pct { font-size: .82rem; color: var(--text-muted); margin: 0; }

/* Results Section */
.results-section {
    padding: 2.5rem;
    text-align: center;
}

.results-header {
    margin-bottom: 2rem;
}

.success-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--success-light);
    color: var(--success);
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 600;
}

.success-badge svg,
.success-badge i {
    flex-shrink: 0;
}

/* Results Comparison */
.results-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.comparison-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.comparison-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.comparison-label.highlight {
    color: var(--tool-primary);
}

.comparison-preview {
    width: 200px;
    height: 150px;
    background: 
        linear-gradient(45deg, var(--border) 25%, transparent 25%),
        linear-gradient(-45deg, var(--border) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--border) 75%),
        linear-gradient(-45deg, transparent 75%, var(--border) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    overflow: hidden;
}

.comparison-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.comparison-stats {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    background: var(--bg);
    border-radius: var(--radius-full);
}

.comparison-stats.highlight {
    background: var(--tool-primary-light);
    color: var(--tool-primary);
    font-weight: 600;
}

.comparison-arrow {
    color: var(--tool-primary);
    flex-shrink: 0;
}

/* Results Info */
.results-info {
    max-width: 400px;
    margin: 0 auto 2rem;
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 1rem;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.info-row:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.info-row.highlight {
    background: var(--tool-primary-light);
    margin: 0.5rem -1rem -1rem;
    padding: 0.75rem 1rem;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    font-weight: 600;
    color: var(--tool-primary);
}

.speed-factor {
    color: var(--tool-primary);
    font-weight: 700;
}

/* Results Actions */
.results-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Error Message */
.error-message {
    margin: 1rem 2rem;
    padding: 1.25rem 1.5rem;
    background: rgba(230, 78, 78, 0.08);
    border: 1px solid rgba(230, 78, 78, 0.2);
    border-radius: var(--radius-md);
    color: var(--danger);
    text-align: left;
}

.error-text {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.error-contact {
    font-size: 0.9rem;
    font-weight: 400;
    opacity: 0.85;
}

.error-contact a {
    color: var(--danger);
    text-decoration: underline;
    font-weight: 600;
}

/* Related Tools */
.related-tools {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
    padding: 1.25rem 1.5rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    border: 1px solid var(--border);
}

.related-label {
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
}

.related-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: var(--bg);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
}

.related-link:hover {
    background: var(--tool-primary);
    color: white;
    border-color: var(--tool-primary);
    transform: translateY(-2px);
}

.related-link svg,
.related-link i {
    flex-shrink: 0;
}

/* Info Sections - No background, shadow, or border */
.info-sections {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.info-card {
    padding: 2rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.35rem;
    color: var(--text);
    margin: 0 0 1.5rem;
}

.info-card h2 svg,
.info-card h2 i {
    color: var(--tool-primary);
    flex-shrink: 0;
}

/* Steps List */
.steps-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: step;
}

.steps-list li {
    position: relative;
    padding-left: 3.5rem;
    padding-bottom: 1.25rem;
    counter-increment: step;
    color: var(--text-secondary);
    line-height: 1.6;
}

.steps-list li:not(:last-child)::after {
    content: '';
    position: absolute;
    left: calc(1rem - 1px);
    top: 2rem;
    bottom: 0;
    width: 2px;
    background: var(--tool-primary-light);
}

[data-theme="dark"] .steps-list li:not(:last-child)::after {
    background: rgba(96, 165, 250, 0.2);
}

.steps-list li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background: var(--tool-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    z-index: 1;
}

.steps-list li a {
    color: var(--tool-primary);
    text-decoration: none;
}

.steps-list li a:hover {
    text-decoration: underline;
}

/* Mode Explanations */
.mode-explanations {
    display: grid;
    gap: 1rem;
}

.mode-explain {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.mode-tag {
    flex-shrink: 0;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.mode-tag.fast-tag {
    background: var(--tool-fast);
}

.mode-tag.normal-tag {
    background: var(--tool-normal);
}

.mode-tag.slow-tag {
    background: var(--tool-slow);
}

.mode-explain p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.mode-explain p a {
    color: var(--tool-primary);
    text-decoration: none;
}

.mode-explain p a:hover {
    text-decoration: underline;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 0.75rem;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--bg);
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.faq-question:hover {
    background: var(--bg-elevated);
}

.faq-question svg,
.faq-question i {
    color: var(--tool-primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-question svg,
.faq-item.open .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 1.25rem 1rem;
    background: var(--bg-elevated);
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-answer p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq-answer a {
    color: var(--tool-primary);
    text-decoration: none;
}

.faq-answer a:hover {
    text-decoration: underline;
}

/* Speed Indicator */
.speed-indicator {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    z-index: 10;
    display: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.speed-indicator.speed-fast {
    background: var(--tool-fast);
}

.speed-indicator.speed-slow {
    background: var(--tool-slow);
}

.speed-indicator.speed-normal {
    background: var(--tool-normal);
}

/* Responsive */
@media (max-width: 900px) {
    .editor-grid {
        grid-template-columns: 1fr;
    }

    .preview-panel {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .file-info-bar {
        justify-content: center;
    }

    .speed-summary {
        flex-direction: column;
        gap: 0.75rem;
    }

    .summary-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .tool-container {
        padding: 1rem;
    }

    .tool-title-row {
        flex-direction: row;
        gap: 0.75rem;
    }

    .tool-icon-wrapper {
        width: 48px;
        height: 48px;
    }

    .tool-icon-wrapper svg,
    .tool-icon-wrapper i {
        width: 24px;
        height: 24px;
    }

    .upload-section,
    .results-section {
        padding: 2rem 1.5rem;
    }

    .preview-panel,
    .controls-panel {
        padding: 1.5rem;
    }

    .resize-mode-tabs {
        flex-direction: column;
    }

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

    .action-bar {
        flex-direction: column;
        padding: 1.5rem;
    }

    .btn {
        width: 100%;
    }

    .results-comparison {
        flex-direction: column;
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }

    .related-tools {
        flex-direction: column;
        text-align: center;
    }

    .related-links {
        justify-content: center;
    }

    .mode-explain {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .tool-title {
        font-size: 1.5rem;
    }

    .file-info-bar {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .comparison-preview {
        width: 160px;
        height: 120px;
    }

    .steps-list li {
        padding-left: 3rem;
    }

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

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

.editor-section,
.results-section {
    animation: fadeIn 0.4s ease;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ══════════════════════════════════════════════════════
   NEW FEATURE STYLES  (all gsc- prefixed)
   ══════════════════════════════════════════════════════ */

/* Cancel button - prefixed to avoid custom_styles override */
.gsc-btn-cancel {
    display: inline-flex; align-items: center; justify-content: center;
    gap: .5rem; padding: .875rem 1.5rem; font-size: 1rem; font-weight: 600;
    border-radius: var(--radius-full); cursor: pointer; transition: all .2s;
    font-family: inherit; background: var(--bg); color: var(--text-secondary);
    border: 1px solid var(--border); text-decoration: none;
}
.gsc-btn-cancel:hover { background: var(--bg-elevated); border-color: var(--text-muted); color: var(--text); }
.gsc-btn-cancel svg, .gsc-btn-cancel i { width: 18px; height: 18px; }

/* Live badge */
.gsc-live-badge {
    display: inline-flex; align-items: center; gap: 4px;
    background: var(--tool-fast); color: #fff; font-size: .7rem;
    font-weight: 700; padding: .15rem .5rem; border-radius: var(--radius-full);
    text-transform: uppercase; letter-spacing: .05em; animation: gsc-pulse 2s ease-in-out infinite;
}
@keyframes gsc-pulse { 0%,100%{opacity:1} 50%{opacity:.65} }

/* Canvas placeholder */
.gsc-canvas-placeholder {
    display: flex; align-items: center; justify-content: center;
    min-height: 180px; color: var(--text-muted);
}

/* FPS / Duration stat row */
.gsc-stat-row {
    display: flex; align-items: center; justify-content: center;
    gap: 1rem; padding: 1rem; background: var(--bg);
    border-radius: var(--radius-md); border: 1px solid var(--border);
}
.gsc-stat-item { display: flex; flex-direction: column; align-items: center; gap: .25rem; }
.gsc-stat-label { font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); }
.gsc-stat-value { font-size: 1.35rem; font-weight: 700; color: var(--text); }
.gsc-stat-value.gsc-stat-primary { color: var(--tool-primary); }

/* Quick FPS preset buttons */
.gsc-quick-btns {
    display: flex; gap: .5rem; margin-top: .75rem; flex-wrap: wrap;
}
.gsc-quick-btn {
    padding: .4rem .875rem; border: 1px solid var(--border);
    border-radius: var(--radius-full); font-size: .82rem; font-weight: 600;
    cursor: pointer; background: var(--bg-elevated); color: var(--text-secondary);
    transition: all .2s; font-family: inherit;
}
.gsc-quick-btn:hover { border-color: var(--tool-primary); color: var(--tool-primary); background: var(--tool-primary-light); }
.gsc-quick-btn.active { background: var(--tool-primary-light); border-color: var(--tool-primary); color: var(--tool-primary); }

/* Reverse / Boomerang toggles */
.gsc-extra-options {
    display: flex; flex-direction: column; gap: .75rem;
    margin-top: 1rem; padding-top: 1rem;
    border-top: 1px solid var(--border);
}
.gsc-toggle-row {
    display: flex; align-items: flex-start; gap: .75rem;
    padding: .75rem 1rem; background: var(--bg);
    border-radius: var(--radius-md); cursor: pointer;
    border: 1px solid transparent; transition: all .2s;
}
.gsc-toggle-row:hover { background: var(--bg-elevated); border-color: var(--border); }
.gsc-toggle-row:has(.gsc-checkbox:checked) { background: var(--tool-primary-light); border-color: var(--tool-primary); }

/* Hide native checkbox - use custom knob */
.gsc-checkbox { display: none !important; }

.gsc-toggle-knob {
    position: relative; width: 36px; height: 20px; flex-shrink: 0;
    background: var(--border); border-radius: var(--radius-full);
    transition: background .2s; margin-top: 1px;
}
.gsc-toggle-knob::after {
    content: ''; position: absolute; top: 2px; left: 2px;
    width: 16px; height: 16px; background: #fff;
    border-radius: 50%; transition: transform .2s; box-shadow: var(--shadow-sm);
}
.gsc-toggle-row:has(.gsc-checkbox:checked) .gsc-toggle-knob { background: var(--tool-primary); }
.gsc-toggle-row:has(.gsc-checkbox:checked) .gsc-toggle-knob::after { transform: translateX(16px); }

.gsc-toggle-text { flex: 1; min-width: 0; }
.gsc-toggle-title { display: block; font-size: .9rem; font-weight: 600; color: var(--text); }
.gsc-toggle-desc  { display: block; font-size: .78rem; color: var(--text-muted); margin-top: 2px; }

/* Per-frame editor section */
.gsc-frame-editor-section {
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.gsc-frame-editor-toggle {
    width: 100%; display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; padding: 1rem 2rem; background: none; border: none;
    cursor: pointer; font-family: inherit; text-align: left;
    transition: background .2s;
}
.gsc-frame-editor-toggle:hover { background: var(--bg-elevated); }
.gsc-fed-title {
    display: flex; align-items: center; flex-wrap: wrap; gap: .5rem;
    font-size: .95rem; font-weight: 600; color: var(--text);
}
.gsc-fed-sub {
    font-size: .78rem; font-weight: 400; color: var(--text-muted);
}
.gsc-frame-editor-body { padding: 0 2rem 1.5rem; }
.gsc-fed-toolbar {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: .75rem; margin-bottom: 1rem;
}
.gsc-fed-hint { font-size: .8rem; color: var(--text-muted); }
.gsc-apply-all-btn {
    padding: .35rem .875rem; font-size: .8rem; font-weight: 600;
    border: 1px solid var(--border); border-radius: var(--radius-full);
    background: var(--bg-elevated); color: var(--text-secondary);
    cursor: pointer; font-family: inherit; transition: all .2s;
}
.gsc-apply-all-btn:hover { border-color: var(--tool-primary); color: var(--tool-primary); }

.gsc-frame-table-wrap { max-height: 320px; overflow-y: auto; border-radius: var(--radius-md); border: 1px solid var(--border); }
.gsc-frame-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
.gsc-frame-table thead th {
    position: sticky; top: 0; background: var(--bg-elevated);
    padding: .5rem .75rem; text-align: left; font-weight: 600;
    color: var(--text-muted); font-size: .75rem; text-transform: uppercase;
    letter-spacing: .04em; border-bottom: 1px solid var(--border);
}
.gsc-frame-table tbody tr { border-bottom: 1px solid var(--border); }
.gsc-frame-table tbody tr:last-child { border-bottom: none; }
.gsc-frame-table tbody tr:hover { background: var(--bg); }
.gsc-frame-table td { padding: .4rem .75rem; vertical-align: middle; }

/* Frame thumb canvas in table */
.gsc-frame-thumb {
    display: block; border-radius: 3px;
    background-image: linear-gradient(45deg,var(--border) 25%,transparent 25%),
        linear-gradient(-45deg,var(--border) 25%,transparent 25%),
        linear-gradient(45deg,transparent 75%,var(--border) 75%),
        linear-gradient(-45deg,transparent 75%,var(--border) 75%);
    background-size: 6px 6px;
    background-position: 0 0,0 3px,3px -3px,-3px 0;
}

/* Frame delay input */
.gsc-frame-delay-input {
    width: 72px; padding: .3rem .5rem; font-size: .85rem; font-weight: 600;
    text-align: center; border: 1px solid var(--border);
    border-radius: var(--radius-sm); background: var(--bg-elevated);
    color: var(--text); transition: border-color .2s;
    -moz-appearance: textfield;
    min-width: 0;
}
.gsc-frame-delay-input::-webkit-outer-spin-button,
.gsc-frame-delay-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.gsc-frame-delay-input:focus { outline: none; border-color: var(--tool-primary); }
.gsc-frame-delay-input.gsc-modified { border-color: var(--tool-primary); background: var(--tool-primary-light); }

.gsc-ftd-unit { font-size: .75rem; color: var(--text-muted); margin-left: 3px; }

.gsc-frame-reset-btn {
    width: 24px; height: 24px; border: 1px solid var(--border);
    border-radius: var(--radius-sm); background: none; cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--text-muted); transition: all .2s;
}
.gsc-frame-reset-btn:hover { border-color: var(--danger); color: var(--danger); }

/* Responsive */
@media (max-width: 768px) {
    .gsc-stat-row { flex-direction: column; gap: .5rem; }
    .gsc-frame-editor-toggle { padding: 1rem 1.25rem; }
    .gsc-frame-editor-body { padding: 0 1.25rem 1.25rem; }
    .gsc-fed-toolbar { flex-direction: column; align-items: flex-start; }
}

/* Min delay warning in results */
.gsc-min-delay-warning {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    margin: 0 0 1.5rem;
    background: var(--warning-light, rgba(245,158,11,0.1));
    border: 1px solid var(--warning, #f59e0b);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}
.gsc-min-delay-warning svg {
    color: var(--warning, #f59e0b);
    flex-shrink: 0;
}