/* ============================================
   PDF to PNG Converter v3
   Prefix: ptp- | Light default, full dark mode
   Features: preview, drag-reorder, watermark,
   grayscale, resize, merge, DPI slider, range
   ============================================ */

:root {
    --ptp-transition: 0.25s;
    --ptp-primary: #e64e4e;
    --ptp-primary-light: #fee2e2;
    --ptp-primary-dark: #c73d3d;
    --ptp-accent: #e64e4e;
    --ptp-success: #339966;
    --ptp-success-light: #e8f5e9;
    --ptp-warning: #f59e0b;
    --ptp-warning-light: #fef3c7;
    --ptp-danger: #e64e4e;
    --ptp-danger-light: #fee2e2;
    --ptp-bg: #fef7f7;
    --ptp-bg-elevated: #ffffff;
    --ptp-bg-secondary: #f8f4f4;
    --ptp-bg-tertiary: #f1eaea;
    --ptp-text: #1e293b;
    --ptp-text-secondary: #475569;
    --ptp-text-muted: #64748b;
    --ptp-border: #e7d7d7;
    --ptp-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --ptp-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --ptp-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --ptp-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --ptp-shadow-primary: 0 4px 14px rgba(230,78,78,0.25);
    --ptp-shadow-primary-hover: 0 6px 20px rgba(230,78,78,0.35);
    --ptp-radius-sm: 6px;
    --ptp-radius-md: 12px;
    --ptp-radius-lg: 16px;
    --ptp-radius-xl: 24px;
    --ptp-radius-full: 9999px;
    --ptp-checker-a: #f0f0f0;
    --ptp-checker-b: #e0e0e0;
}

[data-theme="dark"] {
    --ptp-primary: #f87171;
    --ptp-primary-light: rgba(248,113,113,0.15);
    --ptp-primary-dark: #ef4444;
    --ptp-accent: #f87171;
    --ptp-success: #4ade80;
    --ptp-success-light: rgba(74,222,128,0.15);
    --ptp-warning: #fbbf24;
    --ptp-warning-light: rgba(251,191,36,0.15);
    --ptp-danger: #f87171;
    --ptp-danger-light: rgba(248,113,113,0.15);
    --ptp-bg: #0f172a;
    --ptp-bg-elevated: #1e293b;
    --ptp-bg-secondary: #334155;
    --ptp-bg-tertiary: #475569;
    --ptp-text: #f1f5f9;
    --ptp-text-secondary: #cbd5e1;
    --ptp-text-muted: #94a3b8;
    --ptp-border: #334155;
    --ptp-shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --ptp-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --ptp-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
    --ptp-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5);
    --ptp-shadow-primary: 0 4px 14px rgba(248,113,113,0.2);
    --ptp-shadow-primary-hover: 0 6px 20px rgba(248,113,113,0.3);
    --ptp-checker-a: #334155;
    --ptp-checker-b: #475569;
}

* { box-sizing: border-box; }

/* ── Layout ─────────────────────────────────────── */
.ptp-container { max-width: 1000px; margin: 0 auto; padding: 2rem; }
.ptp-header { text-align: center; margin-bottom: 2rem; }
.ptp-title-row { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 1rem; }

.ptp-icon-wrapper {
    width: 64px; height: 64px; background: var(--ptp-primary);
    border-radius: var(--ptp-radius-lg); display: flex; align-items: center; justify-content: center;
    color: white; box-shadow: var(--ptp-shadow-primary); flex-shrink: 0;
    transition: background-color var(--ptp-transition);
}
.ptp-icon-wrapper svg { width: 28px; height: 28px; }

.ptp-title { font-size: clamp(1.75rem,4vw,2.5rem); font-weight: 700; margin: 0; color: var(--ptp-primary); letter-spacing: -0.02em; }
.ptp-description { font-size: 1.1rem; color: var(--ptp-text-secondary); max-width: 800px; margin: 0 auto; line-height: 1.7; }
.ptp-description a { color: var(--ptp-primary); text-decoration: none; font-weight: 500; }
.ptp-description a:hover { text-decoration: underline; }

/* ── Main Card ───────────────────────────────────── */
.ptp-main {
    background: var(--ptp-bg-elevated); border-radius: var(--ptp-radius-xl);
    box-shadow: var(--ptp-shadow-xl); overflow: visible;
    border: 1px solid var(--ptp-border); margin-bottom: 2rem;
    transition: background-color var(--ptp-transition), border-color var(--ptp-transition);
}

/* ── Upload ──────────────────────────────────────── */
.ptp-upload-section { padding: 3rem; }
.ptp-upload-area {
    border: 2px dashed var(--ptp-border); border-radius: var(--ptp-radius-lg);
    padding: 4rem 2rem; text-align: center; cursor: pointer;
    transition: all 0.3s ease; background: var(--ptp-bg-secondary); position: relative; overflow: hidden;
}
.ptp-upload-area::before { content: ''; position: absolute; inset: 0; background: var(--ptp-primary-light); opacity: 0; transition: opacity 0.3s ease; }
.ptp-upload-area:hover, .ptp-upload-area.dragover { border-color: var(--ptp-primary); background: var(--ptp-bg); transform: translateY(-2px); box-shadow: var(--ptp-shadow-md); }
.ptp-upload-area:hover::before, .ptp-upload-area.dragover::before { opacity: 0.5; }
.ptp-upload-content { position: relative; z-index: 1; }
.ptp-upload-icon { color: var(--ptp-primary); margin-bottom: 1.5rem; transition: transform 0.3s ease; }
.ptp-upload-area:hover .ptp-upload-icon { transform: translateY(-5px); }
.ptp-upload-title { font-size: 1.5rem; font-weight: 600; color: var(--ptp-text); margin: 0 0 0.5rem; }
.ptp-upload-subtitle { color: var(--ptp-text-secondary); margin: 0 0 1rem; }
.ptp-file-types { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }
.ptp-badge { background: var(--ptp-primary-light); color: var(--ptp-primary); padding: 0.35rem 0.85rem; border-radius: var(--ptp-radius-full); font-size: 0.8rem; font-weight: 600; }
.ptp-upload-hint { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--ptp-text-muted); font-size: 0.875rem; }

/* ── Editor ──────────────────────────────────────── */
.ptp-editor-section { background: var(--ptp-bg-elevated); animation: ptp-fadeIn 0.4s ease; }

.ptp-files-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1rem 2rem; background: var(--ptp-bg-secondary); border-bottom: 1px solid var(--ptp-border);
    transition: background-color var(--ptp-transition), border-color var(--ptp-transition);
}
.ptp-files-header-left { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; color: var(--ptp-text); }
.ptp-files-header-left svg { color: var(--ptp-primary); }

.ptp-drag-hint { display: inline-flex; align-items: center; gap: 0.25rem; font-size: 0.75rem; font-weight: 400; color: var(--ptp-text-muted); margin-left: 0.5rem; }

.ptp-btn-text {
    display: flex; align-items: center; gap: 0.25rem; background: none; border: none;
    color: var(--ptp-accent); font-weight: 600; font-size: 0.9rem; cursor: pointer;
    padding: 0.5rem 0.75rem; border-radius: var(--ptp-radius-md); transition: all 0.2s ease; font-family: inherit;
}
.ptp-btn-text:hover { background: var(--ptp-primary-light); }

.ptp-files-list {
    display: flex; flex-direction: column; gap: 0.5rem;
    padding: 1.25rem 2rem; max-height: 260px; overflow-y: auto;
    border-bottom: 1px solid var(--ptp-border);
}
.ptp-files-list::-webkit-scrollbar { width: 6px; }
.ptp-files-list::-webkit-scrollbar-track { background: var(--ptp-bg); border-radius: 3px; }
.ptp-files-list::-webkit-scrollbar-thumb { background: var(--ptp-text-muted); border-radius: 3px; }

/* ── File Item (drag) ────────────────────────────── */
.ptp-file-item {
    display: flex; align-items: center; gap: 0.75rem; padding: 0.7rem;
    background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border);
    border-radius: var(--ptp-radius-md); transition: all 0.2s ease; user-select: none;
}
.ptp-file-item:hover { border-color: var(--ptp-primary); background: var(--ptp-bg); }
.ptp-file-item.dragging  { opacity: 0.4; }
.ptp-file-item.drag-over { border-color: var(--ptp-primary); background: var(--ptp-primary-light); }

.ptp-drag-handle { color: var(--ptp-text-muted); cursor: grab; flex-shrink: 0; display: flex; align-items: center; }
.ptp-drag-handle:active { cursor: grabbing; }
.ptp-drag-handle svg { width: 15px; height: 15px; }
.ptp-file-order { font-size: 0.7rem; font-weight: 700; color: var(--ptp-text-muted); min-width: 1rem; text-align: center; }

.ptp-file-icon { width: 40px; height: 40px; border-radius: var(--ptp-radius-md); background: var(--ptp-primary-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.ptp-file-icon svg { width: 20px; height: 20px; color: var(--ptp-primary); }
.ptp-file-info { flex: 1; min-width: 0; }
.ptp-file-name { font-weight: 600; color: var(--ptp-text); margin: 0 0 0.15rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 0.875rem; }
.ptp-file-meta { font-size: 0.75rem; color: var(--ptp-text-muted); }

.ptp-file-remove {
    width: 28px; height: 28px; border: none; background: var(--ptp-danger-light);
    color: var(--ptp-danger); border-radius: var(--ptp-radius-full); cursor: pointer;
    display: flex; align-items: center; justify-content: center; transition: all 0.2s ease; flex-shrink: 0;
}
.ptp-file-remove:hover { background: var(--ptp-danger); color: white; }
.ptp-file-remove svg { width: 14px; height: 14px; }

/* ── Preview Panel (Feature 1) ───────────────────── */
.ptp-preview-panel {
    display: flex; align-items: flex-start; gap: 1.5rem;
    padding: 1.25rem 2rem; background: var(--ptp-bg-secondary);
    border-bottom: 1px solid var(--ptp-border);
    transition: background-color var(--ptp-transition), border-color var(--ptp-transition);
    animation: ptp-fadeIn 0.3s ease;
}
.ptp-preview-thumb-wrap {
    width: 120px; flex-shrink: 0;
    border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-md);
    overflow: hidden; background: var(--ptp-bg-elevated);
    min-height: 80px; display: flex; align-items: center; justify-content: center;
}
.ptp-preview-loading { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; padding: 1rem; font-size: 0.72rem; color: var(--ptp-text-muted); }
.ptp-preview-ring { width: 24px; height: 24px; border: 3px solid var(--ptp-border); border-top-color: var(--ptp-primary); border-radius: 50%; animation: ptp-spin 0.8s linear infinite; }
.ptp-preview-img { width: 100%; height: auto; display: block; }
.ptp-preview-info { flex: 1; }
.ptp-preview-title { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ptp-text-muted); margin-bottom: 0.3rem; }
.ptp-preview-filename { font-weight: 600; color: var(--ptp-text); font-size: 0.9rem; margin-bottom: 0.5rem; word-break: break-all; }
.ptp-preview-meta { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.ptp-meta-chip { display: inline-flex; align-items: center; gap: 0.25rem; font-size: 0.75rem; color: var(--ptp-text-muted); background: var(--ptp-bg-elevated); padding: 0.2rem 0.5rem; border-radius: var(--ptp-radius-full); border: 1px solid var(--ptp-border); }
.ptp-meta-chip svg { color: var(--ptp-primary); }
.ptp-page-hint { font-size: 0.72rem; color: var(--ptp-text-muted); font-style: italic; margin: 0; }

/* ── Settings ────────────────────────────────────── */
.ptp-settings-panel { padding: 2rem; background: var(--ptp-bg-elevated); transition: background-color var(--ptp-transition); }
.ptp-panel-header { margin-bottom: 1.5rem; }
.ptp-panel-header h3 { display: flex; align-items: center; gap: 0.5rem; font-size: 1.05rem; font-weight: 600; color: var(--ptp-text); margin: 0; }
.ptp-panel-header h3 svg { color: var(--ptp-primary); }
.ptp-settings-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 2rem; }
.ptp-settings-col { display: flex; flex-direction: column; gap: 1.5rem; }
.ptp-setting-group { display: flex; flex-direction: column; gap: 0.6rem; }
.ptp-section-label { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; font-size: 0.875rem; color: var(--ptp-text); }
.ptp-section-label svg { color: var(--ptp-primary); }
.ptp-section-label-sm { display: flex; align-items: center; gap: 0.4rem; font-weight: 600; font-size: 0.78rem; color: var(--ptp-text-secondary); text-transform: uppercase; letter-spacing: 0.03em; }

/* DPI Slider (Feature 8) */
.ptp-slider-row { display: flex; align-items: center; gap: 0.75rem; }
.ptp-slider { flex: 1; height: 6px; border-radius: var(--ptp-radius-full); -webkit-appearance: none; appearance: none; cursor: pointer; background: var(--ptp-border); outline: none; }
.ptp-slider::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--ptp-bg-elevated); border: 3px solid var(--ptp-primary); cursor: pointer; box-shadow: var(--ptp-shadow-sm); transition: transform 0.15s ease; }
.ptp-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.ptp-slider::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--ptp-bg-elevated); border: 3px solid var(--ptp-primary); cursor: pointer; }
.ptp-value-display { font-size: 0.82rem; font-weight: 700; color: var(--ptp-text); white-space: nowrap; min-width: 55px; text-align: right; }
.ptp-slider-labels { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--ptp-text-muted); }
.ptp-presets { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.25rem; }
.ptp-preset-label { font-size: 0.75rem; color: var(--ptp-text-muted); font-weight: 600; }
.ptp-preset-btn { padding: 0.25rem 0.6rem; font-size: 0.75rem; font-weight: 600; background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-sm); cursor: pointer; color: var(--ptp-text); transition: all 0.2s ease; font-family: inherit; }
.ptp-preset-btn:hover { border-color: var(--ptp-primary); color: var(--ptp-primary); }
.ptp-preset-btn.active { background: var(--ptp-primary); border-color: var(--ptp-primary); color: white; }
.ptp-bc-reset { background: none !important; border: none !important; color: var(--ptp-primary) !important; font-weight: 600; font-size: 0.78rem; cursor: pointer; display: inline-flex; align-items: center; gap: 0.25rem; padding: 0.2rem 0; font-family: inherit; }
.ptp-bc-reset:hover { opacity: 0.75; }

/* Page Range (Feature 2) */
.ptp-range-toggle { display: flex; gap: 0.5rem; }
.ptp-range-btn { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.875rem; font-size: 0.8rem; font-weight: 600; background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-full); cursor: pointer; color: var(--ptp-text); transition: all 0.2s ease; font-family: inherit; }
.ptp-range-btn:hover { border-color: var(--ptp-primary); }
.ptp-range-btn.active { border-color: var(--ptp-primary); background: var(--ptp-primary-light); color: var(--ptp-primary); }
.ptp-range-btn svg { width: 13px; height: 13px; color: var(--ptp-text-muted); }
.ptp-range-btn.active svg { color: var(--ptp-primary); }
.ptp-range-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.5rem; animation: ptp-fadeIn 0.3s ease; }
.ptp-range-group label { display: block; font-size: 0.75rem; font-weight: 600; color: var(--ptp-text-muted); margin-bottom: 0.3rem; text-transform: uppercase; letter-spacing: 0.04em; }
.ptp-range-input { width: 100%; padding: 0.5rem 0.75rem; border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-md); background: var(--ptp-bg-elevated); color: var(--ptp-text); font-size: 0.9rem; font-weight: 600; text-align: center; font-family: inherit; transition: all 0.2s ease; }
.ptp-range-input:focus { outline: none; border-color: var(--ptp-primary); box-shadow: 0 0 0 3px rgba(230,78,78,0.1); }
.ptp-range-hint { font-size: 0.75rem; color: var(--ptp-text-muted); font-style: italic; margin: 0; }

/* Color Mode (Feature 5) */
.ptp-mode-toggle { display: flex; flex-direction: column; gap: 0.4rem; }
.ptp-mode-btn { display: flex; align-items: center; gap: 0.6rem; padding: 0.625rem 0.875rem; background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-md); cursor: pointer; text-align: left; transition: all 0.2s ease; width: 100%; color: var(--ptp-text); font-family: inherit; }
.ptp-mode-btn:hover { border-color: var(--ptp-primary); background: var(--ptp-bg); }
.ptp-mode-btn.active { border-color: var(--ptp-primary); background: var(--ptp-primary-light); }
.ptp-mode-btn svg { color: var(--ptp-primary); flex-shrink: 0; width: 15px; height: 15px; }
.ptp-mode-label { font-weight: 600; font-size: 0.875rem; }
.ptp-mode-desc { font-size: 0.72rem; color: var(--ptp-text-muted); margin-left: auto; }
.ptp-mode-btn.active .ptp-mode-desc { color: var(--ptp-primary); opacity: 0.7; }

/* Image Resize (Feature 6) */
.ptp-size-toggle { display: flex; gap: 0.3rem; flex-wrap: wrap; }
.ptp-size-btn { display: inline-flex; align-items: center; padding: 0.4rem 0.7rem; font-size: 0.78rem; font-weight: 600; background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-sm); cursor: pointer; color: var(--ptp-text); transition: all 0.2s ease; font-family: inherit; }
.ptp-size-btn:hover { border-color: var(--ptp-primary); }
.ptp-size-btn.active { background: var(--ptp-primary); border-color: var(--ptp-primary); color: white; }
.ptp-custom-size { display: flex; align-items: center; gap: 0.75rem; margin-top: 0.5rem; animation: ptp-fadeIn 0.3s ease; }
.ptp-size-input { width: 130px; padding: 0.5rem 0.75rem; border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-md); background: var(--ptp-bg-elevated); color: var(--ptp-text); font-size: 0.9rem; font-weight: 600; font-family: inherit; transition: all 0.2s ease; }
.ptp-size-input:focus { outline: none; border-color: var(--ptp-primary); }
.ptp-size-hint { font-size: 0.75rem; color: var(--ptp-text-muted); }

.ptp-info-tip { display: flex; align-items: flex-start; gap: 0.6rem; padding: 0.875rem 1rem; background: var(--ptp-success-light); border-radius: var(--ptp-radius-md); font-size: 0.875rem; color: var(--ptp-text-secondary); line-height: 1.5; }
.ptp-info-tip svg { color: var(--ptp-success); flex-shrink: 0; margin-top: 2px; }

/* ── Watermark Section (Feature 4) ───────────────── */
.ptp-watermark-section {
    margin-top: 1.5rem; padding: 1.25rem;
    background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border);
    border-radius: var(--ptp-radius-md);
    transition: border-color var(--ptp-transition), background-color var(--ptp-transition);
}
.ptp-watermark-section.active { border-color: var(--ptp-primary); }
.ptp-watermark-header { display: flex; align-items: center; justify-content: space-between; }

.ptp-toggle-row { display: flex; align-items: center; gap: 0.6rem; cursor: pointer; }
.ptp-toggle-row input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.ptp-toggle-custom { width: 36px; height: 20px; border-radius: var(--ptp-radius-full); background: var(--ptp-bg-tertiary); position: relative; flex-shrink: 0; transition: background 0.2s ease; }
.ptp-toggle-custom::after { content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: white; transition: transform 0.2s ease; box-shadow: 0 1px 3px rgba(0,0,0,0.2); }
.ptp-toggle-row input:checked + .ptp-toggle-custom { background: var(--ptp-primary); }
.ptp-toggle-row input:checked + .ptp-toggle-custom::after { transform: translateX(16px); }
.ptp-toggle-text { font-size: 0.875rem; font-weight: 600; color: var(--ptp-text); }

.ptp-watermark-controls { margin-top: 1.25rem; animation: ptp-fadeIn 0.3s ease; }
.ptp-watermark-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1rem; }
.ptp-text-input { width: 100%; padding: 0.6rem 0.875rem; border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-md); background: var(--ptp-bg-elevated); color: var(--ptp-text); font-size: 0.9rem; font-weight: 600; font-family: inherit; transition: all 0.2s ease; }
.ptp-text-input:focus { outline: none; border-color: var(--ptp-primary); box-shadow: 0 0 0 3px rgba(230,78,78,0.1); }

.ptp-pos-toggle { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.ptp-pos-btn { padding: 0.3rem 0.625rem; font-size: 0.78rem; font-weight: 600; background: var(--ptp-bg-elevated); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-sm); cursor: pointer; color: var(--ptp-text); transition: all 0.2s ease; font-family: inherit; }
.ptp-pos-btn:hover { border-color: var(--ptp-primary); }
.ptp-pos-btn.active { background: var(--ptp-primary); border-color: var(--ptp-primary); color: white; }

.ptp-color-toggle { display: flex; gap: 0.4rem; }
.ptp-color-btn { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.35rem 0.7rem; font-size: 0.78rem; font-weight: 600; background: var(--ptp-bg-elevated); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-sm); cursor: pointer; color: var(--ptp-text); transition: all 0.2s ease; font-family: inherit; }
.ptp-color-btn:hover { border-color: var(--ptp-primary); }
.ptp-color-btn.active { border-color: var(--ptp-primary); background: var(--ptp-primary-light); color: var(--ptp-primary); }
.ptp-color-dot { width: 11px; height: 11px; border-radius: 50%; border: 1px solid var(--ptp-border); flex-shrink: 0; }
.ptp-value-inline { font-size: 0.78rem; font-weight: 700; color: var(--ptp-primary); }

.ptp-wm-preview { display: flex; align-items: center; gap: 0.5rem; margin-top: 1rem; padding: 0.625rem 0.875rem; background: var(--ptp-bg-elevated); border-radius: var(--ptp-radius-md); font-size: 0.78rem; color: var(--ptp-text-muted); border: 1px solid var(--ptp-border); }
.ptp-wm-preview svg { color: var(--ptp-primary); flex-shrink: 0; }
.ptp-wm-preview em { font-style: normal; font-weight: 600; color: var(--ptp-text); }

/* ── Output Bar - Merge (Feature 7) ──────────────── */
.ptp-output-bar {
    display: flex; align-items: center; flex-wrap: wrap; gap: 0.75rem;
    padding: 1rem 2rem; background: var(--ptp-bg-secondary); border-top: 1px solid var(--ptp-border);
    transition: background-color var(--ptp-transition), border-color var(--ptp-transition);
}
.ptp-output-label { display: flex; align-items: center; gap: 0.4rem; font-weight: 600; font-size: 0.875rem; color: var(--ptp-text); flex-shrink: 0; }
.ptp-output-label svg { color: var(--ptp-primary); }
.ptp-option-toggle { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.9rem; font-size: 0.85rem; font-weight: 600; background: var(--ptp-bg-elevated); border: 2px solid var(--ptp-border); border-radius: var(--ptp-radius-full); cursor: pointer; color: var(--ptp-text); transition: all 0.2s ease; font-family: inherit; }
.ptp-option-toggle:hover { border-color: var(--ptp-primary); }
.ptp-option-toggle.active { border-color: var(--ptp-primary); background: var(--ptp-primary-light); color: var(--ptp-primary); }
.ptp-option-toggle svg { width: 15px; height: 15px; color: var(--ptp-text-muted); }
.ptp-option-toggle.active svg { color: var(--ptp-primary); }
.ptp-output-desc { font-size: 0.78rem; color: var(--ptp-text-muted); margin-left: auto; }

/* ── Action Bar ──────────────────────────────────── */
.ptp-action-bar { display: flex; justify-content: flex-end; gap: 1rem; padding: 1.25rem 2rem; border-top: 1px solid var(--ptp-border); background: var(--ptp-bg-secondary); transition: background-color var(--ptp-transition), border-color var(--ptp-transition); }

/* ── Buttons ─────────────────────────────────────── */
.ptp-btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.75rem 1.75rem; border-radius: var(--ptp-radius-full); font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; text-decoration: none; border: none; font-family: inherit; }
.ptp-btn svg { width: 17px; height: 17px; }
.ptp-btn-primary { background: var(--ptp-primary); color: white; box-shadow: var(--ptp-shadow-primary); }
.ptp-btn-primary:hover { background: var(--ptp-primary-dark); transform: translateY(-2px); box-shadow: var(--ptp-shadow-primary-hover); }
.ptp-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }
.ptp-btn-secondary { background: var(--ptp-bg-elevated); color: var(--ptp-text); border: 1px solid var(--ptp-border); }
.ptp-btn-secondary:hover { background: var(--ptp-bg); border-color: var(--ptp-text-muted); }

/* ── Processing Overlay ──────────────────────────── */
.ptp-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.55); backdrop-filter: blur(2px); z-index: 9000; display: flex; align-items: center; justify-content: center; }
.ptp-overlay-card { background: var(--ptp-bg-elevated); border-radius: var(--ptp-radius-xl); padding: 2.5rem 2rem; min-width: 280px; max-width: 360px; width: 90%; text-align: center; box-shadow: var(--ptp-shadow-xl); border: 1px solid var(--ptp-border); }
.ptp-overlay-ring { width: 48px; height: 48px; margin: 0 auto 1.25rem; border: 4px solid var(--ptp-border); border-top-color: var(--ptp-primary); border-radius: 50%; animation: ptp-spin 0.8s linear infinite; }
.ptp-overlay-stages { display: flex; justify-content: center; gap: 0.4rem; margin-bottom: 1rem; flex-wrap: wrap; }
.ptp-stage { display: flex; align-items: center; gap: 0.3rem; font-size: 0.72rem; font-weight: 600; color: var(--ptp-text-muted); padding: 0.2rem 0.55rem; border-radius: var(--ptp-radius-full); background: var(--ptp-bg-secondary); transition: all 0.3s ease; }
.ptp-stage.active { background: var(--ptp-primary-light); color: var(--ptp-primary); }
.ptp-stage.done   { background: var(--ptp-success-light); color: var(--ptp-success); }
.ptp-overlay-msg  { font-size: 0.875rem; color: var(--ptp-text-secondary); margin-bottom: 1rem; min-height: 1.4em; }
.ptp-overlay-bar  { width: 100%; height: 6px; background: var(--ptp-bg-tertiary); border-radius: 3px; overflow: hidden; margin-bottom: 0.5rem; }
.ptp-overlay-fill { height: 100%; width: 0%; background: var(--ptp-primary); border-radius: 3px; transition: width 0.4s ease; }
.ptp-overlay-pct  { font-size: 0.78rem; color: var(--ptp-text-muted); }

/* ── Results ─────────────────────────────────────── */
.ptp-results-section { padding: 2.5rem; text-align: center; animation: ptp-fadeIn 0.4s ease; }
.ptp-results-header { margin-bottom: 1.5rem; }
.ptp-success-icon { width: 72px; height: 72px; background: var(--ptp-success); border-radius: var(--ptp-radius-full); display: flex; align-items: center; justify-content: center; margin: 0 auto 1.25rem; color: white; }
.ptp-results-header h2 { font-size: 1.75rem; color: var(--ptp-text); margin: 0 0 0.5rem; }
.ptp-results-header p  { color: var(--ptp-text-muted); margin: 0; }

.ptp-conversion-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.25rem; }
.ptp-badge-info { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.3rem 0.7rem; background: var(--ptp-bg-secondary); border-radius: var(--ptp-radius-full); font-size: 0.75rem; color: var(--ptp-text-secondary); border: 1px solid var(--ptp-border); }
.ptp-badge-info svg { color: var(--ptp-primary); width: 11px; height: 11px; }

.ptp-pages-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(140px,1fr)); gap: 1rem; margin-bottom: 1.75rem; text-align: left; max-height: 420px; overflow-y: auto; padding: 0.25rem; }
.ptp-pages-grid::-webkit-scrollbar { width: 6px; }
.ptp-pages-grid::-webkit-scrollbar-track { background: var(--ptp-bg); border-radius: 3px; }
.ptp-pages-grid::-webkit-scrollbar-thumb { background: var(--ptp-text-muted); border-radius: 3px; }

.ptp-page-item { display: flex; flex-direction: column; padding: 0.75rem; background: var(--ptp-bg-secondary); border: 1px solid var(--ptp-border); border-radius: var(--ptp-radius-md); transition: all 0.2s ease; }
.ptp-page-item:hover { border-color: var(--ptp-primary); box-shadow: var(--ptp-shadow-md); }
.ptp-page-thumb {
    width: 100%; height: 110px; border-radius: var(--ptp-radius-sm); overflow: hidden;
    display: flex; align-items: center; justify-content: center; margin-bottom: 0.625rem;
    border: 1px solid var(--ptp-border); background-color: var(--ptp-checker-b);
    background-image: linear-gradient(45deg,var(--ptp-checker-a) 25%,transparent 25%), linear-gradient(-45deg,var(--ptp-checker-a) 25%,transparent 25%), linear-gradient(45deg,transparent 75%,var(--ptp-checker-a) 75%), linear-gradient(-45deg,transparent 75%,var(--ptp-checker-a) 75%);
    background-size: 12px 12px; background-position: 0 0,0 6px,6px -6px,-6px 0;
}
.ptp-page-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
.ptp-page-name { font-weight: 600; font-size: 0.78rem; color: var(--ptp-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 0.2rem; }
.ptp-page-size { font-size: 0.72rem; color: var(--ptp-text-muted); margin-bottom: 0.625rem; }
.ptp-page-download { display: flex; align-items: center; justify-content: center; gap: 0.3rem; padding: 0.45rem; background: var(--ptp-primary); color: white; border-radius: var(--ptp-radius-md); text-decoration: none; font-size: 0.78rem; font-weight: 600; transition: all 0.2s ease; }
.ptp-page-download:hover { background: var(--ptp-primary-dark); }
.ptp-page-download svg { width: 13px; height: 13px; }

.ptp-stats { display: flex; justify-content: center; align-items: center; gap: 2rem; flex-wrap: wrap; margin-bottom: 1.25rem; padding: 1.1rem 1.5rem; background: var(--ptp-bg-secondary); border-radius: var(--ptp-radius-md); }
.ptp-stat { text-align: center; }
.ptp-stat-label { display: block; font-size: 0.72rem; color: var(--ptp-text-muted); margin-bottom: 0.2rem; text-transform: uppercase; letter-spacing: 0.5px; }
.ptp-stat-value { font-size: 1.2rem; font-weight: 700; color: var(--ptp-text); }
.ptp-stat.highlight .ptp-stat-value { color: var(--ptp-primary); }

.ptp-optimize-tip { display: flex; align-items: flex-start; gap: 0.6rem; padding: 0.875rem 1rem; background: var(--ptp-warning-light); border-radius: var(--ptp-radius-md); font-size: 0.875rem; color: var(--ptp-text-secondary); line-height: 1.5; margin-bottom: 1.5rem; text-align: left; }
.ptp-optimize-tip svg { color: var(--ptp-warning); flex-shrink: 0; margin-top: 2px; }
.ptp-optimize-tip a { color: var(--ptp-primary); font-weight: 600; text-decoration: none; }
.ptp-optimize-tip a:hover { text-decoration: underline; }

.ptp-results-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

/* ── Error ───────────────────────────────────────── */
.ptp-error { display: flex; align-items: flex-start; gap: 0.75rem; background: var(--ptp-danger-light); border: 1px solid var(--ptp-danger); padding: 1rem 1.25rem; border-radius: var(--ptp-radius-md); margin: 1.25rem; }
.ptp-error svg { color: var(--ptp-danger); flex-shrink: 0; margin-top: 2px; }
.ptp-error-body { flex: 1; }
.ptp-error-title  { font-weight: 600; color: var(--ptp-danger); margin: 0 0 0.25rem; font-size: 0.95rem; }
.ptp-error-detail { color: var(--ptp-danger); margin: 0 0 0.4rem; font-size: 0.875rem; opacity: 0.9; }
.ptp-error-contact { font-size: 0.8rem; color: var(--ptp-text-secondary); margin: 0; }
.ptp-error-contact a { color: var(--ptp-accent); font-weight: 600; text-decoration: none; }
.ptp-error-contact a:hover { text-decoration: underline; }

/* ── Info Section ────────────────────────────────── */
.ptp-info-section { display: flex; flex-direction: column; gap: 1.5rem; }
.ptp-related-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 0.75rem; padding: 0.5rem 0; margin-bottom: 0.5rem; }
.ptp-related-label { display: flex; align-items: center; gap: 0.4rem; font-weight: 600; color: var(--ptp-text); font-size: 0.875rem; flex-shrink: 0; }
.ptp-related-label svg { color: var(--ptp-primary); width: 14px; height: 14px; }
.ptp-related-links { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.ptp-related-link { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.5rem 1rem; background: var(--ptp-bg-secondary); border-radius: var(--ptp-radius-full); color: var(--ptp-text-secondary); text-decoration: none; font-size: 0.875rem; font-weight: 500; transition: all 0.2s ease; border: 1px solid var(--ptp-border); }
.ptp-related-link:hover { background: var(--ptp-primary); color: white; border-color: var(--ptp-primary); transform: translateY(-2px); }
.ptp-related-link svg { width: 14px; height: 14px; }
.ptp-info-card { border-radius: var(--ptp-radius-xl); padding: 2rem; background: var(--ptp-bg-elevated); border: 1px solid var(--ptp-border); box-shadow: var(--ptp-shadow-sm); transition: background-color var(--ptp-transition), border-color var(--ptp-transition); }
.ptp-info-card h2 { display: flex; align-items: center; gap: 0.75rem; font-size: 1.2rem; font-weight: 700; color: var(--ptp-text); margin: 0 0 1.5rem; }
.ptp-info-card h2 svg { color: var(--ptp-primary); }
.ptp-steps-list { list-style: none; padding: 0; margin: 0 0 1.25rem; counter-reset: ptp-step; }
.ptp-steps-list li { position: relative; padding-left: 3.25rem; padding-bottom: 1rem; color: var(--ptp-text-secondary); line-height: 1.6; counter-increment: ptp-step; }
.ptp-steps-list li:last-child { padding-bottom: 0; }
.ptp-steps-list li::before { content: counter(ptp-step); position: absolute; left: 0; top: 0; width: 1.9rem; height: 1.9rem; background: var(--ptp-primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.85rem; }
.ptp-steps-list li:not(:last-child)::after { content: ''; position: absolute; left: 0.9rem; top: 2rem; bottom: 0; width: 2px; background: var(--ptp-border); }
.ptp-steps-list li a { color: var(--ptp-primary); text-decoration: none; }
.ptp-steps-list li a:hover { text-decoration: underline; }
.ptp-tip { display: flex; align-items: flex-start; gap: 0.75rem; padding: 1rem; background: var(--ptp-warning-light); border-radius: var(--ptp-radius-md); font-size: 0.875rem; color: var(--ptp-text-secondary); line-height: 1.6; }
.ptp-tip svg { color: var(--ptp-warning); flex-shrink: 0; margin-top: 2px; }
.ptp-tip a { color: var(--ptp-primary); font-weight: 600; text-decoration: none; }
.ptp-tip a:hover { text-decoration: underline; }
.ptp-benefits-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.ptp-benefit { display: flex; gap: 1rem; align-items: flex-start; }
.ptp-benefit-icon { width: 46px; height: 46px; flex-shrink: 0; background: var(--ptp-primary-light); border-radius: var(--ptp-radius-md); display: flex; align-items: center; justify-content: center; color: var(--ptp-primary); }
.ptp-benefit h3 { font-size: 0.95rem; font-weight: 600; color: var(--ptp-text); margin: 0 0 0.25rem; }
.ptp-benefit p  { font-size: 0.875rem; color: var(--ptp-text-secondary); margin: 0; line-height: 1.5; }
.faq-section { display: flex; flex-direction: column; gap: 0.625rem; }

/* ── Animations ──────────────────────────────────── */
@keyframes ptp-fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes ptp-spin   { to { transform: rotate(360deg); } }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 900px) { .ptp-settings-grid { grid-template-columns: 1fr; } .ptp-benefits-grid { grid-template-columns: 1fr; } .ptp-watermark-grid { grid-template-columns: 1fr; } }
@media (max-width: 768px) {
    .ptp-container { padding: 1rem; }
    .ptp-upload-section { padding: 2rem 1.25rem; } .ptp-upload-area { padding: 2.5rem 1.25rem; }
    .ptp-files-list, .ptp-settings-panel { padding: 1rem 1.25rem; }
    .ptp-preview-panel { flex-direction: column; padding: 1rem 1.25rem; }
    .ptp-preview-thumb-wrap { width: 100%; max-width: 160px; }
    .ptp-output-bar, .ptp-action-bar { padding: 1rem 1.25rem; }
    .ptp-action-bar { flex-direction: column; }
    .ptp-btn { width: 100%; }
    .ptp-results-section { padding: 2rem 1.25rem; }
    .ptp-pages-grid { grid-template-columns: repeat(2,1fr); }
    .ptp-stats { flex-direction: column; gap: 1rem; }
    .ptp-results-actions { flex-direction: column; }
    .ptp-results-actions .ptp-btn { width: 100%; }
    .ptp-related-tools { flex-direction: column; align-items: flex-start; }
    .ptp-info-card { padding: 1.25rem; }
}
@media (max-width: 480px) {
    .ptp-title-row { flex-direction: column; gap: 0.75rem; }
    .ptp-mode-toggle { flex-direction: row; flex-wrap: wrap; } .ptp-mode-btn { flex: 1; min-width: 0; }
    .ptp-pages-grid { grid-template-columns: 1fr; }
}

::selection { background: rgba(230,78,78,0.2); color: var(--ptp-text); }
[data-theme="dark"] ::selection { background: rgba(248,113,113,0.3); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }