/* ============================================
   GIF First Frame Extractor
   Light Mode Default + Dark Mode Support
   Blue Theme
   ============================================ */

:root {
    --gff-transition: 0.25s;

    --gff-primary: #3399cc;
    --gff-primary-light: #e0f2fe;
    --gff-primary-dark: #2980b9;
    --gff-accent: #e64e4e;

    --gff-success: #339966;
    --gff-success-light: #d1fae5;
    --gff-warning: #f59e0b;
    --gff-warning-light: #fef3c7;
    --gff-danger: #e64e4e;
    --gff-danger-light: #fee2e2;

    --gff-bg: #f0f9ff;
    --gff-bg-elevated: #ffffff;
    --gff-bg-secondary: #e0f2fe;
    --gff-bg-tertiary: #bae6fd;

    --gff-text: #0c4a6e;
    --gff-text-secondary: #075985;
    --gff-text-muted: #6b7280;

    --gff-border: #bae6fd;
    --gff-border-light: #e0f2fe;

    --gff-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --gff-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --gff-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --gff-shadow-primary: 0 4px 14px rgba(51,153,204,0.25);
    --gff-shadow-primary-hover: 0 6px 20px rgba(51,153,204,0.35);

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

    --gff-checker: #f0f0f0;
}

[data-theme="dark"] {
    --gff-primary: #60a5fa;
    --gff-primary-light: rgba(96,165,250,0.15);
    --gff-primary-dark: #3b82f6;
    --gff-accent: #f87171;

    --gff-success: #34d399;
    --gff-success-light: rgba(52,211,153,0.15);
    --gff-warning: #fbbf24;
    --gff-warning-light: rgba(251,191,36,0.15);
    --gff-danger: #f87171;
    --gff-danger-light: rgba(248,113,113,0.15);

    --gff-bg: #0c1929;
    --gff-bg-elevated: #152238;
    --gff-bg-secondary: #1e3a5f;
    --gff-bg-tertiary: #264a6e;

    --gff-text: #e0f2fe;
    --gff-text-secondary: #bae6fd;
    --gff-text-muted: #a8a8b3;

    --gff-border: #264a6e;
    --gff-border-light: #1e3a5f;

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

    --gff-checker: #1e3a5f;
}

/* custom_styles.css overrides */
.tool-container {
    overflow: visible !important;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

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

.tool-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin: 0 0 0.75rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gff-primary);
}

.tool-title i { color: var(--gff-primary); }

.tool-description {
    max-width: 800px;
    margin: 0 auto;
    color: var(--gff-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

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

/* Upload */
.gff-upload-section { margin-bottom: 1.5rem; }

.gff-upload-area {
    background: var(--gff-bg-elevated);
    border: 2px dashed var(--gff-border);
    border-radius: var(--gff-radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--gff-transition);
    box-shadow: var(--gff-shadow-sm);
}

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

.gff-upload-icon {
    color: var(--gff-primary);
    width: 56px;
    height: 56px;
    margin-bottom: 1rem;
}

.gff-upload-title {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gff-text);
}

.gff-upload-subtitle {
    margin: 0 0 1.25rem;
    color: var(--gff-text-muted);
    font-size: 0.95rem;
}

.gff-format-badges {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.gff-format-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    background: var(--gff-bg-secondary);
    color: var(--gff-text);
    border-radius: var(--gff-radius-full);
    font-size: 0.85rem;
    font-weight: 600;
}

.gff-format-badge-out {
    background: var(--gff-primary-light);
    color: var(--gff-primary);
}

.gff-format-arrow { color: var(--gff-text-muted); }

.gff-upload-hints {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.25rem;
    margin-top: 1rem;
}

.gff-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--gff-text-muted);
    font-size: 0.825rem;
}

.gff-hint i { color: var(--gff-primary); opacity: 0.7; }

/* Buttons */
.gff-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--gff-radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--gff-transition);
    font-family: inherit;
}

.gff-btn-primary {
    background: var(--gff-primary);
    color: #ffffff;
    box-shadow: var(--gff-shadow-primary);
}

.gff-btn-primary:hover {
    background: var(--gff-primary-dark);
    box-shadow: var(--gff-shadow-primary-hover);
    transform: translateY(-1px);
    color: #ffffff;
}

.gff-btn-secondary {
    background: var(--gff-bg-secondary);
    color: var(--gff-text);
    border: 1px solid var(--gff-border);
}

.gff-btn-secondary:hover {
    background: var(--gff-primary-light);
    color: var(--gff-primary);
    border-color: var(--gff-primary);
}

.gff-btn-text {
    background: transparent;
    border: none;
    color: var(--gff-text-muted);
    cursor: pointer;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.625rem;
    border-radius: var(--gff-radius-sm);
    transition: all var(--gff-transition);
    font-family: inherit;
}

.gff-btn-text:hover {
    background: var(--gff-bg-secondary);
    color: var(--gff-primary);
}

.gff-btn-text-danger:hover { color: var(--gff-danger); }

/* Editor */
.gff-editor-section {
    background: var(--gff-bg-elevated);
    border-radius: var(--gff-radius-lg);
    box-shadow: var(--gff-shadow-md);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.gff-files-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--gff-bg-secondary);
    border-bottom: 1px solid var(--gff-border);
    flex-wrap: wrap;
}

.gff-files-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--gff-text);
}

.gff-files-header-left i { color: var(--gff-primary); }

.gff-files-header-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Files list */
.gff-files-list {
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    max-height: 360px;
    overflow-y: auto;
}

.gff-file-item {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem;
    background: var(--gff-bg);
    border: 1px solid var(--gff-border-light);
    border-radius: var(--gff-radius-md);
    min-width: 0;
}

.gff-file-preview {
    width: 56px;
    height: 56px;
    background-color: var(--gff-checker);
    background-image:
        linear-gradient(45deg, rgba(0,0,0,0.04) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(0,0,0,0.04) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(0,0,0,0.04) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(0,0,0,0.04) 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
    border-radius: var(--gff-radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.gff-file-info {
    flex: 1;
    min-width: 0;
}

.gff-file-name {
    font-weight: 600;
    color: var(--gff-text);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gff-file-meta {
    font-size: 0.78rem;
    color: var(--gff-text-muted);
    margin-top: 0.125rem;
}

.gff-file-remove {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--gff-radius-sm);
    background: transparent;
    border: 1px solid var(--gff-border);
    color: var(--gff-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--gff-transition);
}

.gff-file-remove:hover {
    background: var(--gff-danger);
    border-color: var(--gff-danger);
    color: #ffffff;
}

/* Settings panel */
.gff-settings-panel {
    padding: 1.5rem;
    border-top: 1px solid var(--gff-border-light);
}

.gff-settings-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gff-text);
    margin: 0 0 1.25rem;
}

.gff-settings-title i { color: var(--gff-primary); }

.gff-settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.gff-setting-row { min-width: 0; }

.gff-setting-label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.625rem;
    font-weight: 600;
    color: var(--gff-text);
    font-size: 0.9rem;
}

.gff-setting-label i { color: var(--gff-primary); }

.gff-setting-hint {
    margin: 0.375rem 0 0;
    color: var(--gff-text-muted);
    font-size: 0.8rem;
}

/* Format / frame pick radio cards */
.gff-radio-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.gff-radio-option { cursor: pointer; }

.gff-radio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.gff-radio-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 0.625rem 0.5rem;
    background: var(--gff-bg);
    border: 1.5px solid var(--gff-border);
    border-radius: var(--gff-radius-md);
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gff-text);
    transition: all var(--gff-transition);
}

.gff-radio-box i { color: var(--gff-primary); }

.gff-radio-option:hover .gff-radio-box {
    border-color: var(--gff-primary);
    background: var(--gff-primary-light);
}

.gff-radio-option input[type="radio"]:checked + .gff-radio-box {
    border-color: var(--gff-primary);
    background: var(--gff-primary-light);
    color: var(--gff-primary);
}

.gff-radio-box-desc {
    display: block;
    font-size: 0.7rem;
    color: var(--gff-text-muted);
    font-weight: 400;
    margin-top: 0.125rem;
}

.gff-radio-option input[type="radio"]:checked + .gff-radio-box .gff-radio-box-desc {
    color: var(--gff-primary);
}

/* Frame number input */
.gff-frame-number-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.625rem;
    font-size: 0.85rem;
    color: var(--gff-text);
}

.gff-frame-input {
    width: 90px;
    padding: 0.5rem 0.625rem;
    border: 1px solid var(--gff-border);
    border-radius: var(--gff-radius-sm);
    background: var(--gff-bg-elevated);
    color: var(--gff-text);
    font-size: 0.9rem;
    font-family: inherit;
}

.gff-frame-input:focus {
    outline: none;
    border-color: var(--gff-primary);
    box-shadow: 0 0 0 3px rgba(51,153,204,0.15);
}

/* BG color row */
.gff-bg-color-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.625rem;
    font-size: 0.85rem;
    color: var(--gff-text-secondary);
}

.gff-color-input {
    width: 40px;
    height: 28px;
    border: 1px solid var(--gff-border);
    border-radius: var(--gff-radius-sm);
    cursor: pointer;
    background: var(--gff-bg-elevated);
}

/* Resize options */
.gff-resize-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gff-resize-option { cursor: pointer; }

.gff-resize-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.gff-resize-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 0.875rem;
    background: var(--gff-bg);
    border: 1.5px solid var(--gff-border);
    border-radius: var(--gff-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gff-text);
    transition: all var(--gff-transition);
}

.gff-resize-box i { color: var(--gff-primary); }

.gff-resize-option:hover .gff-resize-box {
    border-color: var(--gff-primary);
    background: var(--gff-primary-light);
}

.gff-resize-option input[type="radio"]:checked + .gff-resize-box {
    border-color: var(--gff-primary);
    background: var(--gff-primary-light);
    color: var(--gff-primary);
}

.gff-resize-percent-row {
    margin-top: 0.625rem;
    display: none;
}

.gff-range {
    width: 100%;
    height: 6px;
    border-radius: var(--gff-radius-full);
    background: var(--gff-bg-secondary);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.gff-range::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gff-primary);
    cursor: pointer;
    border: 2px solid var(--gff-bg-elevated);
    box-shadow: 0 0 0 1px var(--gff-primary);
}

.gff-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gff-primary);
    cursor: pointer;
    border: 2px solid var(--gff-bg-elevated);
    box-shadow: 0 0 0 1px var(--gff-primary);
}

.gff-percent-display {
    display: flex;
    justify-content: space-between;
    margin-top: 0.375rem;
    font-size: 0.8rem;
    color: var(--gff-text-secondary);
    font-weight: 600;
}

.gff-resize-custom-row {
    display: none;
    align-items: end;
    gap: 0.5rem;
    margin-top: 0.625rem;
}

.gff-dim-group {
    flex: 1;
    min-width: 0;
}

.gff-dim-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--gff-text-muted);
    margin-bottom: 0.25rem;
}

.gff-dim-input {
    width: 100%;
    padding: 0.5rem 0.625rem;
    border: 1px solid var(--gff-border);
    border-radius: var(--gff-radius-sm);
    background: var(--gff-bg-elevated);
    color: var(--gff-text);
    font-size: 0.85rem;
    font-family: inherit;
}

.gff-dim-input:focus {
    outline: none;
    border-color: var(--gff-primary);
    box-shadow: 0 0 0 3px rgba(51,153,204,0.15);
}

/* Info banner */
.gff-info-banner {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    margin-top: 1.25rem;
    padding: 0.875rem 1rem;
    background: var(--gff-primary-light);
    border-radius: var(--gff-radius-sm);
    font-size: 0.85rem;
    color: var(--gff-text-secondary);
    line-height: 1.5;
}

.gff-info-banner i { color: var(--gff-primary); flex-shrink: 0; margin-top: 2px; }

.gff-info-banner a {
    color: var(--gff-primary);
    text-decoration: none;
    font-weight: 600;
}

.gff-info-banner a:hover { text-decoration: underline; }

/* Action bar */
.gff-action-bar {
    padding: 1.25rem 1.5rem;
    background: var(--gff-bg-elevated);
    border-top: 1px solid var(--gff-border-light);
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.gff-action-bar .gff-btn-primary {
    min-width: 240px;
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

/* Processing overlay */
.gff-processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    backdrop-filter: blur(4px);
}

.gff-processing-card {
    background: var(--gff-bg-elevated);
    color: var(--gff-text);
    border-radius: var(--gff-radius-lg);
    border: 1px solid var(--gff-border);
    box-shadow: var(--gff-shadow-lg);
    padding: 1.75rem 2rem;
    min-width: 360px;
    max-width: 90%;
    text-align: center;
}

.gff-processing-text {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 0.375rem;
    color: var(--gff-text);
}

.gff-processing-subtext {
    font-size: 0.875rem;
    color: var(--gff-text-muted);
    margin: 0 0 1rem;
}

.gff-progress-stages {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.gff-stage-dot {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    min-width: 60px;
}

.gff-stage-dot > i {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gff-bg-secondary);
    color: var(--gff-text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    transition: all var(--gff-transition);
}

.gff-stage-dot span {
    font-size: 0.7rem;
    color: var(--gff-text-muted);
    font-weight: 600;
}

.gff-stage-dot.active > i {
    background: var(--gff-primary);
    color: #ffffff;
    transform: scale(1.1);
}

.gff-stage-dot.active span { color: var(--gff-primary); }

.gff-stage-dot.done > i {
    background: var(--gff-success);
    color: #ffffff;
}

.gff-stage-dot.done span { color: var(--gff-success); }

.gff-stage-connector {
    width: 24px;
    height: 2px;
    background: var(--gff-border);
    margin: 0 4px 1rem;
}

.gff-progress-bar-container {
    height: 8px;
    background: var(--gff-bg-secondary);
    border-radius: var(--gff-radius-full);
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.gff-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--gff-primary);
    transition: width 0.3s ease;
    border-radius: var(--gff-radius-full);
}

.gff-progress-text {
    font-weight: 700;
    color: var(--gff-primary);
    margin: 0;
}

/* Results */
.gff-results-section {
    background: var(--gff-bg-elevated);
    border-radius: var(--gff-radius-lg);
    box-shadow: var(--gff-shadow-md);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.gff-results-header { margin-bottom: 1.25rem; }

.gff-success-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gff-success-light);
    color: var(--gff-success);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.625rem;
}

.gff-results-header h2 {
    margin: 0 0 0.25rem;
    color: var(--gff-text);
    font-size: 1.35rem;
    font-weight: 700;
}

.gff-results-header p {
    margin: 0;
    color: var(--gff-text-muted);
    font-size: 0.9rem;
}

.gff-result-preview { margin-bottom: 1.25rem; }

.gff-result-image-wrapper {
    display: inline-block;
    max-width: 100%;
    padding: 12px;
    background-color: var(--gff-checker);
    background-image:
        linear-gradient(45deg, rgba(0,0,0,0.04) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(0,0,0,0.04) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(0,0,0,0.04) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(0,0,0,0.04) 75%);
    background-size: 12px 12px;
    background-position: 0 0, 0 6px, 6px -6px, -6px 0;
    border-radius: var(--gff-radius-md);
    border: 1px solid var(--gff-border-light);
}

.gff-result-image-wrapper img {
    display: block;
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--gff-radius-sm);
}

.gff-results-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.625rem;
    margin-bottom: 1.25rem;
}

.gff-stat-item {
    padding: 0.75rem 0.5rem;
    background: var(--gff-bg);
    border: 1px solid var(--gff-border-light);
    border-radius: var(--gff-radius-md);
    text-align: center;
}

.gff-stat-item.highlight {
    background: var(--gff-primary-light);
    border-color: var(--gff-primary);
}

.gff-stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--gff-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.gff-stat-value {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gff-text);
    word-break: break-all;
}

.gff-stat-item.highlight .gff-stat-value { color: var(--gff-primary); }

/* 2-file results list */
.gff-result-files-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    text-align: left;
}

.gff-result-file {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1rem;
    background: var(--gff-bg);
    border: 1px solid var(--gff-border-light);
    border-radius: var(--gff-radius-md);
    text-decoration: none;
    color: var(--gff-text);
    transition: all var(--gff-transition);
}

.gff-result-file:hover {
    background: var(--gff-primary-light);
    border-color: var(--gff-primary);
}

.gff-result-file-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--gff-radius-sm);
    background: var(--gff-primary-light);
    color: var(--gff-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.gff-result-file-info {
    flex: 1;
    min-width: 0;
}

.gff-result-file-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--gff-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gff-result-file-meta {
    font-size: 0.78rem;
    color: var(--gff-text-muted);
    margin-top: 0.125rem;
}

.gff-result-file-action {
    color: var(--gff-primary);
    flex-shrink: 0;
}

.gff-results-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Error */
.gff-error { margin: 1rem 0; }

.gff-error-content {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.875rem 1rem;
    background: var(--gff-danger-light);
    color: var(--gff-danger);
    border-radius: var(--gff-radius-md);
    font-size: 0.9rem;
}

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

.gff-error-close {
    margin-left: auto;
    background: transparent;
    border: none;
    color: var(--gff-danger);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--gff-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.gff-error-close:hover { background: rgba(230,78,78,0.15); }

/* Related tools */
.gff-related-tools {
    max-width: 1000px;
    margin: 0 auto 2rem;
    padding: 0 2rem;
}

.gff-related-tools-box {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--gff-bg-elevated);
    border: 1px solid var(--gff-border);
    border-radius: var(--gff-radius-lg);
    box-shadow: var(--gff-shadow-sm);
}

.gff-related-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--gff-text-muted);
    white-space: nowrap;
}

.gff-related-label i { color: var(--gff-primary); }

.gff-related-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.gff-related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background: var(--gff-bg-secondary);
    border-radius: var(--gff-radius-full);
    color: var(--gff-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--gff-transition);
}

.gff-related-link:hover {
    background: var(--gff-primary-light);
    color: var(--gff-primary);
}

/* Info sections */
.gff-info-sections {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
}

.gff-info-card {
    background: var(--gff-bg-elevated);
    border: 1px solid var(--gff-border);
    border-radius: var(--gff-radius-lg);
    padding: 1.75rem 2rem;
    margin-bottom: 1.25rem;
}

.gff-info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gff-text);
    margin: 0 0 1.25rem;
}

.gff-info-card h2 i { color: var(--gff-primary); }

.gff-info-card p,
.gff-info-card li {
    color: var(--gff-text-secondary);
    line-height: 1.7;
    margin: 0 0 0.75rem;
}

[data-theme="dark"] .gff-info-card p,
[data-theme="dark"] .gff-info-card li {
    color: var(--gff-text-muted);
}

.gff-info-card a {
    color: var(--gff-primary);
    text-decoration: none;
    font-weight: 500;
}

.gff-info-card a:hover { text-decoration: underline; }

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

.gff-steps-list li {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.gff-steps-list li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 28px;
    height: 28px;
    background: var(--gff-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
}

.gff-steps-list strong { color: var(--gff-text); }

.gff-steps-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: var(--gff-warning-light);
    border-radius: var(--gff-radius-md);
    font-size: 0.875rem;
    color: var(--gff-text-secondary);
    line-height: 1.5;
}

.gff-steps-tip i { color: var(--gff-warning); flex-shrink: 0; margin-top: 2px; }

/* Features grid */
.gff-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.gff-feature-item {
    padding: 1.25rem;
    background: var(--gff-bg);
    border: 1px solid var(--gff-border-light);
    border-radius: var(--gff-radius-md);
}

.gff-feature-item i {
    color: var(--gff-primary);
    margin-bottom: 0.625rem;
    display: block;
}

.gff-feature-item h4 {
    margin: 0 0 0.375rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gff-text);
}

.gff-feature-item p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--gff-text-muted);
    line-height: 1.5;
}

/* Format comparison */
.gff-format-explain {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--gff-border-light);
}

.gff-format-explain:last-child { border-bottom: none; }

.gff-format-tag {
    padding: 0.25rem 0.625rem;
    background: var(--gff-bg-secondary);
    color: var(--gff-text);
    border-radius: var(--gff-radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    min-width: 70px;
    text-align: center;
}

.gff-format-tag.png { background: var(--gff-success); color: #ffffff; }
.gff-format-tag.jpg { background: var(--gff-warning); color: #ffffff; }
.gff-format-tag.webp { background: var(--gff-primary); color: #ffffff; }

.gff-format-explain p { margin: 0; }

/* FAQ */
.faq-item {
    border: 1px solid var(--gff-border-light);
    border-radius: var(--gff-radius-md);
    margin-bottom: 0.625rem;
    overflow: hidden;
    background: var(--gff-bg);
}

.faq-question {
    width: 100%;
    background: transparent;
    border: none;
    padding: 1rem 1.25rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--gff-text);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color var(--gff-transition);
    font-family: inherit;
}

.faq-question:hover { color: var(--gff-primary); }

.faq-question i {
    color: var(--gff-primary);
    transition: transform var(--gff-transition);
    flex-shrink: 0;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--gff-transition);
    padding: 0 1.25rem;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: 0 1.25rem 1rem;
}

.faq-answer p {
    margin: 0;
    color: var(--gff-text-muted);
    line-height: 1.7;
    font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .tool-container { padding: 1rem; }
    .tool-title { font-size: 1.4rem; }

    .gff-upload-area { padding: 2rem 1rem; }
    .gff-upload-title { font-size: 1.2rem; }

    .gff-settings-grid { grid-template-columns: 1fr; }
    .gff-radio-options { grid-template-columns: repeat(3, 1fr); }

    .gff-action-bar .gff-btn-primary {
        width: 100%;
        min-width: 0;
    }

    .gff-related-tools,
    .gff-info-sections {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .gff-info-card { padding: 1.25rem; }

    .gff-processing-card { min-width: 280px; padding: 1.25rem; }

    .gff-stage-dot { min-width: 50px; }
    .gff-stage-connector { width: 16px; }
}

@media (max-width: 480px) {
    .gff-radio-options { grid-template-columns: 1fr; }
}