/* ============================================
   GIF to PDF Converter
   Light Mode Default + Dark Mode Support
   Red Theme (PDF Tools)
   ============================================ */

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

    --gtp-primary: #e64e4e;
    --gtp-primary-light: #fee2e2;
    --gtp-primary-dark: #c93838;
    --gtp-accent: #3399cc;

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

    --gtp-bg: #fff5f5;
    --gtp-bg-elevated: #ffffff;
    --gtp-bg-secondary: #fee2e2;
    --gtp-bg-tertiary: #fecaca;

    --gtp-text: #7f1d1d;
    --gtp-text-secondary: #991b1b;
    --gtp-text-muted: #6b7280;

    --gtp-border: #fecaca;
    --gtp-border-light: #fee2e2;

    --gtp-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --gtp-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --gtp-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --gtp-shadow-primary: 0 4px 14px rgba(230,78,78,0.25);
    --gtp-shadow-primary-hover: 0 6px 20px rgba(230,78,78,0.35);

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

    --gtp-checker: #f0f0f0;
}

[data-theme="dark"] {
    --gtp-primary: #f87171;
    --gtp-primary-light: rgba(248,113,113,0.15);
    --gtp-primary-dark: #ef4444;
    --gtp-accent: #60a5fa;

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

    --gtp-bg: #1a0c0c;
    --gtp-bg-elevated: #2a1515;
    --gtp-bg-secondary: #3d1f1f;
    --gtp-bg-tertiary: #4d2828;

    --gtp-text: #fee2e2;
    --gtp-text-secondary: #fecaca;
    --gtp-text-muted: #a8a8b3;

    --gtp-border: #4d2828;
    --gtp-border-light: #3d1f1f;

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

    --gtp-checker: #3d1f1f;
}

/* ============================================
   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(--gtp-primary);
}

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

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

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

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

/* ============================================
   Upload dropzone
   ============================================ */
.gtp-upload-section { margin-bottom: 1.5rem; }

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

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

.gtp-upload-area.gtp-loading {
    pointer-events: none;
    opacity: 0.7;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.gtp-btn-text {
    background: transparent;
    border: none;
    color: var(--gtp-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(--gtp-radius-sm);
    transition: all var(--gtp-transition);
    font-family: inherit;
}

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

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

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

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

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

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

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

/* ============================================
   Files grid
   ============================================ */
.gtp-files-grid {
    padding: 1rem 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 0.75rem;
    max-height: 400px;
    overflow-y: auto;
}

.gtp-file-item {
    position: relative;
    background: var(--gtp-bg);
    border: 2px solid var(--gtp-border-light);
    border-radius: var(--gtp-radius-md);
    padding: 0.625rem;
    cursor: grab;
    transition: all var(--gtp-transition);
    min-width: 0;
    user-select: none;
}

.gtp-file-item:hover {
    border-color: var(--gtp-primary);
    transform: translateY(-2px);
    box-shadow: var(--gtp-shadow-sm);
}

.gtp-file-item.gtp-dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.gtp-file-item.gtp-drag-over {
    border-color: var(--gtp-primary);
    background: var(--gtp-primary-light);
    transform: scale(1.04);
}

.gtp-file-number {
    position: absolute;
    top: 6px;
    left: 6px;
    background: var(--gtp-primary);
    color: #ffffff;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 2;
}

.gtp-file-frame-badge {
    position: absolute;
    top: 6px;
    right: 38px;
    background: var(--gtp-accent);
    color: #ffffff;
    padding: 2px 6px;
    border-radius: var(--gtp-radius-full);
    font-size: 0.65rem;
    font-weight: 700;
    z-index: 2;
}

.gtp-file-preview {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: var(--gtp-radius-sm);
    overflow: hidden;
    background-color: var(--gtp-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: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.gtp-file-info {
    text-align: center;
    min-width: 0;
}

.gtp-file-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gtp-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gtp-file-meta {
    font-size: 0.7rem;
    color: var(--gtp-text-muted);
    margin-top: 0.125rem;
}

.gtp-file-actions {
    position: absolute;
    top: 6px;
    right: 6px;
    display: flex;
    gap: 4px;
    z-index: 2;
}

.gtp-file-action {
    width: 24px;
    height: 24px;
    border-radius: var(--gtp-radius-sm);
    background: rgba(255,255,255,0.9);
    border: 1px solid var(--gtp-border);
    color: var(--gtp-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--gtp-transition);
}

[data-theme="dark"] .gtp-file-action {
    background: rgba(42,21,21,0.9);
}

.gtp-file-action:hover {
    background: var(--gtp-primary);
    border-color: var(--gtp-primary);
    color: #ffffff;
}

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

.gtp-file-reorder {
    display: flex;
    justify-content: space-between;
    gap: 4px;
    margin-top: 0.5rem;
}

.gtp-file-move {
    flex: 1;
    height: 28px;
    border-radius: var(--gtp-radius-sm);
    background: var(--gtp-bg-elevated);
    border: 1px solid var(--gtp-border);
    color: var(--gtp-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--gtp-transition);
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

.gtp-file-move:hover:not(:disabled) {
    background: var(--gtp-primary);
    border-color: var(--gtp-primary);
    color: #ffffff;
}

.gtp-file-move:active:not(:disabled) {
    transform: scale(0.95);
}

.gtp-file-move:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

[data-theme="dark"] .gtp-file-move {
    background: var(--gtp-bg-secondary);
}

.gtp-drag-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.75rem;
    color: var(--gtp-text-muted);
    font-size: 0.825rem;
    border-top: 1px solid var(--gtp-border-light);
    background: var(--gtp-bg);
}

.gtp-drag-hint i { color: var(--gtp-primary); }

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

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

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

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

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

.gtp-setting-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.625rem;
    font-weight: 600;
    color: var(--gtp-text);
    font-size: 0.9rem;
}

.gtp-setting-label > span:first-child {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

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

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

/* Radio-card groups (frame mode, page size, orientation, fit, output) */
.gtp-radio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 0.5rem;
}

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

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

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

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

.gtp-radio-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 0.625rem 0.5rem;
    background: var(--gtp-bg);
    border: 1.5px solid var(--gtp-border);
    border-radius: var(--gtp-radius-md);
    text-align: center;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--gtp-text);
    transition: all var(--gtp-transition);
    height: 100%;
}

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

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

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

/* Frame-mode extra rows */
.gtp-frame-extra-row {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-top: 0.75rem;
    padding: 0.625rem 0.75rem;
    background: var(--gtp-bg);
    border: 1px solid var(--gtp-border-light);
    border-radius: var(--gtp-radius-md);
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--gtp-text-secondary);
}

.gtp-frame-extra-row label {
    font-weight: 600;
    color: var(--gtp-text);
}

.gtp-num-input {
    width: 70px;
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--gtp-border);
    border-radius: var(--gtp-radius-sm);
    background: var(--gtp-bg-elevated);
    color: var(--gtp-text);
    font-size: 0.85rem;
    font-family: inherit;
}

.gtp-num-input:focus {
    outline: none;
    border-color: var(--gtp-primary);
    box-shadow: 0 0 0 3px rgba(230,78,78,0.15);
}

/* Page-size select */
.gtp-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--gtp-border);
    border-radius: var(--gtp-radius-sm);
    background: var(--gtp-bg-elevated);
    color: var(--gtp-text);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
}

.gtp-select:focus {
    outline: none;
    border-color: var(--gtp-primary);
    box-shadow: 0 0 0 3px rgba(230,78,78,0.15);
}

/* Margin presets */
.gtp-margin-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.gtp-preset-btn {
    padding: 0.375rem 0.75rem;
    background: var(--gtp-bg);
    border: 1px solid var(--gtp-border);
    border-radius: var(--gtp-radius-full);
    color: var(--gtp-text);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--gtp-transition);
    font-family: inherit;
}

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

.gtp-preset-btn.active {
    background: var(--gtp-primary);
    border-color: var(--gtp-primary);
    color: #ffffff;
}

.gtp-custom-margin-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.625rem;
    font-size: 0.85rem;
    color: var(--gtp-text-secondary);
}

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

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

.gtp-bg-presets {
    display: flex;
    gap: 0.375rem;
    margin-left: 0.25rem;
}

.gtp-bg-preset {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--gtp-border);
    cursor: pointer;
    transition: transform var(--gtp-transition);
}

.gtp-bg-preset:hover { transform: scale(1.1); }
.gtp-bg-preset.active { border-color: var(--gtp-primary); transform: scale(1.1); }

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

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

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

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

/* ============================================
   Estimated output box
   ============================================ */
.gtp-size-estimate {
    margin: 0 1.5rem 1rem;
    padding: 0.875rem 1rem;
    background: var(--gtp-bg-elevated);
    border: 1px solid var(--gtp-border);
    border-radius: var(--gtp-radius-md);
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.gtp-size-estimate-main {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gtp-text);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.gtp-size-estimate-main i { color: var(--gtp-primary); flex-shrink: 0; }

.gtp-size-estimate-main strong {
    color: var(--gtp-primary);
    font-size: 1.05rem;
    margin-left: auto;
    font-variant-numeric: tabular-nums;
}

.gtp-size-estimate-note {
    display: flex;
    align-items: flex-start;
    gap: 0.25rem;
    color: var(--gtp-text-muted);
    font-size: 0.75rem;
    line-height: 1.4;
}

.gtp-size-estimate-note i { flex-shrink: 0; margin-top: 2px; }

.gtp-size-estimate.gtp-size-warn .gtp-size-estimate-main strong {
    color: var(--gtp-warning);
}

.gtp-size-estimate.gtp-size-danger .gtp-size-estimate-main strong {
    color: var(--gtp-danger);
}

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

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

/* ============================================
   Processing overlay
   ============================================ */
.gtp-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);
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.gtp-pdf-preview {
    margin-bottom: 1.25rem;
}

.gtp-pdf-icon-wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 150px;
    background: var(--gtp-primary-light);
    border: 2px solid var(--gtp-primary);
    border-radius: var(--gtp-radius-md);
    margin-bottom: 0.5rem;
}

.gtp-pdf-icon-wrapper i {
    width: 60px;
    height: 60px;
    color: var(--gtp-primary);
}

.gtp-pdf-preview-name {
    font-size: 0.85rem;
    color: var(--gtp-text-muted);
    margin: 0;
    word-break: break-all;
}

.gtp-results-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.625rem;
    margin-bottom: 1.25rem;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.gtp-info-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gtp-text);
    margin: 1.25rem 0 0.5rem;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

.gtp-format-tag.pdf { background: var(--gtp-primary); color: #ffffff; }
.gtp-format-tag.gif { background: var(--gtp-accent); color: #ffffff; }

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

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

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

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

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

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

/* ============================================
   FAQ
   ============================================ */
.faq-item {
    border: 1px solid var(--gtp-border-light);
    border-radius: var(--gtp-radius-md);
    margin-bottom: 0.625rem;
    overflow: hidden;
    background: var(--gtp-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(--gtp-text);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color var(--gtp-transition);
    font-family: inherit;
}

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

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

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--gtp-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(--gtp-text-muted);
    line-height: 1.7;
    font-size: 0.9rem;
}

.faq-answer a { color: var(--gtp-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; }

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

    .gtp-files-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 0.5rem;
        padding: 0.75rem;
    }

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

    .gtp-radio-grid { grid-template-columns: repeat(2, 1fr); }
    .gtp-radio-grid.gtp-radio-grid-3 { grid-template-columns: repeat(3, 1fr); }

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

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

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

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

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

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

    .gtp-size-estimate { margin: 0 1rem 1rem; }
}

@media (max-width: 480px) {
    .gtp-files-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gtp-results-stats {
        grid-template-columns: 1fr 1fr;
    }

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