/* ============================================
   Word to PDF Converter v3
   Prefix: wtp- | Light default, full dark mode
   Features: page-range, watermark, grayscale,
   page-size, merge, compression, drag-reorder
   ============================================ */

:root {
    --wtp-transition: 0.25s;
    --wtp-primary: #3399cc;
    --wtp-primary-light: #e3f2fd;
    --wtp-primary-dark: #2980b9;
    --wtp-accent: #3399cc;
    --wtp-success: #339966;
    --wtp-success-light: #e8f5e9;
    --wtp-warning: #f59e0b;
    --wtp-warning-light: #fef3c7;
    --wtp-danger: #e64e4e;
    --wtp-danger-light: #fee2e2;
    --wtp-bg: #f0f7fb;
    --wtp-bg-elevated: #ffffff;
    --wtp-bg-secondary: #f1f5f9;
    --wtp-bg-tertiary: #e2e8f0;
    --wtp-text: #1e293b;
    --wtp-text-secondary: #475569;
    --wtp-text-muted: #64748b;
    --wtp-border: #d1e3f0;
    --wtp-border-light: #e2e8f0;
    --wtp-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --wtp-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --wtp-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --wtp-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --wtp-shadow-primary: 0 4px 14px rgba(51,153,204,0.25);
    --wtp-shadow-primary-hover: 0 6px 20px rgba(51,153,204,0.35);
    --wtp-radius-sm: 6px;
    --wtp-radius-md: 12px;
    --wtp-radius-lg: 16px;
    --wtp-radius-xl: 24px;
    --wtp-radius-full: 9999px;
}

[data-theme="dark"] {
    --wtp-primary: #60a5fa;
    --wtp-primary-light: rgba(96,165,250,0.15);
    --wtp-primary-dark: #3399cc;
    --wtp-accent: #60a5fa;
    --wtp-success: #4ade80;
    --wtp-success-light: rgba(74,222,128,0.15);
    --wtp-warning: #fbbf24;
    --wtp-warning-light: rgba(251,191,36,0.15);
    --wtp-danger: #f87171;
    --wtp-danger-light: rgba(248,113,113,0.15);
    --wtp-bg: #0f172a;
    --wtp-bg-elevated: #1e293b;
    --wtp-bg-secondary: #334155;
    --wtp-bg-tertiary: #475569;
    --wtp-text: #f1f5f9;
    --wtp-text-secondary: #cbd5e1;
    --wtp-text-muted: #94a3b8;
    --wtp-border: #334155;
    --wtp-border-light: #475569;
    --wtp-shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --wtp-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --wtp-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
    --wtp-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.5);
    --wtp-shadow-primary: 0 4px 14px rgba(96,165,250,0.2);
    --wtp-shadow-primary-hover: 0 6px 20px rgba(96,165,250,0.3);
}

* { box-sizing: border-box; }

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

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

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

.wtp-description {
    font-size: 1.1rem; color: var(--wtp-text-secondary);
    max-width: 800px; margin: 0 auto; line-height: 1.7;
}
.wtp-description a { color: var(--wtp-primary); text-decoration: none; font-weight: 500; }
.wtp-description a:hover { text-decoration: underline; }

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

/* ── Upload ──────────────────────────────────────── */
.wtp-upload-section { padding: 3rem; }
.wtp-upload-area {
    border: 2px dashed var(--wtp-border);
    border-radius: var(--wtp-radius-lg);
    padding: 4rem 2rem; text-align: center; cursor: pointer;
    transition: all 0.3s ease; background: var(--wtp-bg-secondary);
    position: relative; overflow: hidden;
}
.wtp-upload-area::before {
    content: ''; position: absolute; inset: 0;
    background: var(--wtp-primary-light); opacity: 0; transition: opacity 0.3s ease;
}
.wtp-upload-area:hover, .wtp-upload-area.dragover {
    border-color: var(--wtp-primary); background: var(--wtp-bg);
    transform: translateY(-2px); box-shadow: var(--wtp-shadow-md);
}
.wtp-upload-area:hover::before, .wtp-upload-area.dragover::before { opacity: 0.5; }
.wtp-upload-content { position: relative; z-index: 1; }
.wtp-upload-icon { color: var(--wtp-primary); margin-bottom: 1.5rem; transition: transform 0.3s ease; }
.wtp-upload-area:hover .wtp-upload-icon { transform: translateY(-5px); }
.wtp-upload-title { font-size: 1.5rem; font-weight: 600; color: var(--wtp-text); margin: 0 0 0.5rem; }
.wtp-upload-subtitle { color: var(--wtp-text-secondary); margin: 0 0 1rem; }
.wtp-file-types { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1rem; }
.wtp-badge { background: var(--wtp-primary-light); color: var(--wtp-primary); padding: 0.35rem 0.85rem; border-radius: var(--wtp-radius-full); font-size: 0.8rem; font-weight: 600; }
.wtp-badge-docx { background: #2b579a; color: white; }
.wtp-badge-doc  { background: #185abd; color: white; }
.wtp-upload-hint { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--wtp-text-muted); font-size: 0.875rem; }

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

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

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

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

.wtp-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(--wtp-border);
}
.wtp-files-list::-webkit-scrollbar { width: 6px; }
.wtp-files-list::-webkit-scrollbar-track { background: var(--wtp-bg); border-radius: 3px; }
.wtp-files-list::-webkit-scrollbar-thumb { background: var(--wtp-text-muted); border-radius: 3px; }

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

.wtp-drag-handle {
    color: var(--wtp-text-muted); cursor: grab; flex-shrink: 0; padding: 0.1rem;
    display: flex; align-items: center;
}
.wtp-drag-handle:active { cursor: grabbing; }
.wtp-drag-handle svg { width: 16px; height: 16px; }

.wtp-file-icon {
    width: 40px; height: 40px; border-radius: var(--wtp-radius-md);
    background: var(--wtp-primary-light);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.wtp-file-icon svg { width: 20px; height: 20px; color: var(--wtp-primary); }
.wtp-file-icon.converting { background: var(--wtp-warning-light); }
.wtp-file-icon.converting svg { color: var(--wtp-warning); }
.wtp-file-icon.complete { background: var(--wtp-success-light); }
.wtp-file-icon.complete svg { color: var(--wtp-success); }
.wtp-file-icon.error { background: var(--wtp-danger-light); }
.wtp-file-icon.error svg { color: var(--wtp-danger); }

.wtp-file-order {
    font-size: 0.7rem; font-weight: 700; color: var(--wtp-text-muted);
    min-width: 1rem; text-align: center;
}

.wtp-file-info { flex: 1; min-width: 0; }
.wtp-file-name { font-weight: 600; color: var(--wtp-text); margin: 0 0 0.15rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 0.9rem; }
.wtp-file-meta { font-size: 0.78rem; color: var(--wtp-text-muted); }

.wtp-file-status {
    display: flex; align-items: center; gap: 0.35rem;
    padding: 0.2rem 0.6rem; border-radius: var(--wtp-radius-full);
    font-size: 0.75rem; font-weight: 500; white-space: nowrap;
}
.wtp-file-status.pending    { background: var(--wtp-bg-tertiary); color: var(--wtp-text-muted); }
.wtp-file-status.converting { background: var(--wtp-primary-light); color: var(--wtp-primary); }
.wtp-file-status.complete   { background: var(--wtp-success-light); color: var(--wtp-success); }
.wtp-file-status.error      { background: var(--wtp-danger-light); color: var(--wtp-danger); }

.wtp-file-remove {
    width: 30px; height: 30px; border: none; background: transparent;
    color: var(--wtp-text-muted); border-radius: var(--wtp-radius-sm);
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s ease; flex-shrink: 0;
}
.wtp-file-remove:hover { background: var(--wtp-danger-light); color: var(--wtp-danger); }
.wtp-file-remove svg { width: 15px; height: 15px; }

/* ── Settings Panel ──────────────────────────────── */
.wtp-settings-panel {
    padding: 2rem; background: var(--wtp-bg-elevated);
    transition: background-color var(--wtp-transition);
}
.wtp-panel-header { margin-bottom: 1.5rem; }
.wtp-panel-header h3 {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 1.05rem; font-weight: 600; color: var(--wtp-text); margin: 0;
}
.wtp-panel-header h3 svg { color: var(--wtp-primary); }

.wtp-settings-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.wtp-settings-col { display: flex; flex-direction: column; gap: 1.5rem; }
.wtp-setting-group { display: flex; flex-direction: column; gap: 0.6rem; }

.wtp-section-label {
    display: flex; align-items: center; gap: 0.5rem;
    font-weight: 600; font-size: 0.875rem; color: var(--wtp-text);
}
.wtp-section-label svg { color: var(--wtp-primary); }
.wtp-section-label-sm {
    display: flex; align-items: center; gap: 0.5rem;
    font-weight: 600; font-size: 0.8rem; color: var(--wtp-text-secondary);
    text-transform: uppercase; letter-spacing: 0.03em;
}

/* Mode toggle buttons (Quality, Color/Grayscale) */
.wtp-mode-toggle { display: flex; flex-direction: column; gap: 0.4rem; }
.wtp-mode-btn {
    display: flex; align-items: center; gap: 0.6rem;
    padding: 0.65rem 0.875rem;
    background: var(--wtp-bg-secondary); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-md); cursor: pointer; text-align: left;
    transition: all 0.2s ease; width: 100%; color: var(--wtp-text); font-family: inherit;
}
.wtp-mode-btn:hover { border-color: var(--wtp-primary); background: var(--wtp-bg); }
.wtp-mode-btn.active { border-color: var(--wtp-primary); background: var(--wtp-primary-light); }
.wtp-mode-btn svg { color: var(--wtp-primary); flex-shrink: 0; width: 15px; height: 15px; }
.wtp-mode-label { font-weight: 600; font-size: 0.875rem; }
.wtp-mode-desc { font-size: 0.75rem; color: var(--wtp-text-muted); margin-left: auto; }
.wtp-mode-btn.active .wtp-mode-desc { color: var(--wtp-primary); opacity: 0.75; }

/* Page Range */
.wtp-range-toggle { display: flex; gap: 0.5rem; }
.wtp-range-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 0.875rem; font-size: 0.8rem; font-weight: 600;
    background: var(--wtp-bg-secondary); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-full); cursor: pointer; color: var(--wtp-text);
    transition: all 0.2s ease; font-family: inherit;
}
.wtp-range-btn:hover { border-color: var(--wtp-primary); }
.wtp-range-btn.active { border-color: var(--wtp-primary); background: var(--wtp-primary-light); color: var(--wtp-primary); }
.wtp-range-btn svg { color: var(--wtp-text-muted); width: 14px; height: 14px; }
.wtp-range-btn.active svg { color: var(--wtp-primary); }

.wtp-range-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.5rem; animation: wtp-fadeIn 0.3s ease; }
.wtp-range-input-group label { display: block; font-size: 0.75rem; font-weight: 600; color: var(--wtp-text-muted); margin-bottom: 0.3rem; text-transform: uppercase; letter-spacing: 0.04em; }
.wtp-range-input {
    width: 100%; padding: 0.5rem 0.75rem;
    border: 1px solid var(--wtp-border); border-radius: var(--wtp-radius-md);
    background: var(--wtp-bg-elevated); color: var(--wtp-text);
    font-size: 0.9rem; font-weight: 600; text-align: center; font-family: inherit;
    transition: all 0.2s ease;
}
.wtp-range-input:focus { outline: none; border-color: var(--wtp-primary); box-shadow: 0 0 0 3px rgba(51,153,204,0.12); }
.wtp-range-hint { font-size: 0.75rem; color: var(--wtp-text-muted); font-style: italic; margin: 0; }

/* Page Size */
.wtp-size-toggle { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.wtp-size-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.4rem 0.8rem; font-size: 0.8rem; font-weight: 600;
    background: var(--wtp-bg-secondary); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-sm); cursor: pointer; color: var(--wtp-text);
    transition: all 0.2s ease; font-family: inherit;
}
.wtp-size-btn:hover { border-color: var(--wtp-primary); }
.wtp-size-btn.active { border-color: var(--wtp-primary); background: var(--wtp-primary); color: white; }
.wtp-size-btn svg { width: 13px; height: 13px; color: var(--wtp-text-muted); }
.wtp-size-btn.active svg { color: white; }

/* Checkboxes */
.wtp-checkbox-list { display: flex; flex-direction: column; gap: 0.4rem; }
.wtp-checkbox-row {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.6rem 0.875rem;
    background: var(--wtp-bg-secondary); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-md); cursor: pointer; transition: all 0.2s ease;
}
.wtp-checkbox-row:hover { border-color: var(--wtp-primary); background: var(--wtp-bg); }
.wtp-checkbox-wrap { position: relative; flex-shrink: 0; }
.wtp-checkbox-wrap input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.wtp-checkbox-custom {
    display: block; width: 18px !important; height: 18px !important;
    border: 2px solid var(--wtp-border) !important;
    border-radius: var(--wtp-radius-sm); background: var(--wtp-bg-elevated) !important;
    position: relative; transition: all 0.2s ease; margin-right: 0 !important;
}
.wtp-checkbox-wrap input:checked + .wtp-checkbox-custom { background: var(--wtp-primary) !important; border-color: var(--wtp-primary) !important; }
.wtp-checkbox-custom::after {
    content: ''; position: absolute; top: 1px; left: 5px;
    width: 5px; height: 9px; border: solid white; border-width: 0 2px 2px 0;
    transform: rotate(45deg) scale(0); transition: transform 0.15s ease;
}
.wtp-checkbox-wrap input:checked + .wtp-checkbox-custom::after { transform: rotate(45deg) scale(1); }
.wtp-checkbox-text { display: flex; flex-direction: column; }
.wtp-checkbox-text strong { font-size: 0.85rem; color: var(--wtp-text); font-weight: 600; }
.wtp-checkbox-text small  { font-size: 0.73rem; color: var(--wtp-text-muted); }

/* Compression Slider */
.wtp-slider-row { display: flex; align-items: center; gap: 0.75rem; }
.wtp-slider {
    flex: 1; height: 6px; border-radius: var(--wtp-radius-full);
    -webkit-appearance: none; appearance: none; cursor: pointer;
    background: var(--wtp-border); outline: none;
}
.wtp-slider::-webkit-slider-thumb {
    -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%;
    background: var(--wtp-bg-elevated); border: 3px solid var(--wtp-primary);
    cursor: pointer; box-shadow: var(--wtp-shadow-sm); transition: transform 0.15s ease;
}
.wtp-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.wtp-slider::-moz-range-thumb {
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--wtp-bg-elevated); border: 3px solid var(--wtp-primary); cursor: pointer;
}
.wtp-value-display { font-size: 0.82rem; font-weight: 700; color: var(--wtp-text); white-space: nowrap; min-width: 60px; text-align: right; }
.wtp-slider-labels { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--wtp-text-muted); }
.wtp-presets { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.25rem; }
.wtp-preset-label { font-size: 0.75rem; color: var(--wtp-text-muted); font-weight: 600; }
.wtp-preset-btn {
    padding: 0.25rem 0.6rem; font-size: 0.75rem; font-weight: 600;
    background: var(--wtp-bg-secondary); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-sm); cursor: pointer; color: var(--wtp-text);
    transition: all 0.2s ease; font-family: inherit;
}
.wtp-preset-btn:hover { border-color: var(--wtp-primary); color: var(--wtp-primary); }
.wtp-preset-btn.active { background: var(--wtp-primary); border-color: var(--wtp-primary); color: white; }

.wtp-bc-reset {
    background: none !important; border: none !important;
    color: var(--wtp-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;
}
.wtp-bc-reset:hover { opacity: 0.75; }

/* ── Watermark Section (Feature 4) ───────────────── */
.wtp-watermark-section {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--wtp-bg-secondary);
    border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-md);
    transition: border-color var(--wtp-transition), background-color var(--wtp-transition);
}
.wtp-watermark-section.active { border-color: var(--wtp-primary); }

.wtp-watermark-header { display: flex; align-items: center; justify-content: space-between; }

/* Toggle switch */
.wtp-toggle-row {
    display: flex; align-items: center; gap: 0.6rem; cursor: pointer;
}
.wtp-toggle-row input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.wtp-toggle-custom {
    width: 36px; height: 20px; border-radius: var(--wtp-radius-full);
    background: var(--wtp-bg-tertiary); position: relative; flex-shrink: 0;
    transition: background 0.2s ease;
}
.wtp-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);
}
.wtp-toggle-row input:checked + .wtp-toggle-custom { background: var(--wtp-primary); }
.wtp-toggle-row input:checked + .wtp-toggle-custom::after { transform: translateX(16px); }
.wtp-toggle-text { font-size: 0.875rem; font-weight: 600; color: var(--wtp-text); }

.wtp-watermark-controls { margin-top: 1.25rem; animation: wtp-fadeIn 0.3s ease; }
.wtp-watermark-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }

.wtp-text-input {
    width: 100%; padding: 0.6rem 0.875rem;
    border: 1px solid var(--wtp-border); border-radius: var(--wtp-radius-md);
    background: var(--wtp-bg-elevated); color: var(--wtp-text);
    font-size: 0.9rem; font-weight: 600; font-family: inherit;
    transition: all 0.2s ease;
}
.wtp-text-input:focus { outline: none; border-color: var(--wtp-primary); box-shadow: 0 0 0 3px rgba(51,153,204,0.12); }

.wtp-pos-toggle { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.wtp-pos-btn {
    padding: 0.3rem 0.65rem; font-size: 0.78rem; font-weight: 600;
    background: var(--wtp-bg-elevated); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-sm); cursor: pointer; color: var(--wtp-text);
    transition: all 0.2s ease; font-family: inherit;
}
.wtp-pos-btn:hover { border-color: var(--wtp-primary); }
.wtp-pos-btn.active { background: var(--wtp-primary); border-color: var(--wtp-primary); color: white; }

.wtp-color-toggle { display: flex; gap: 0.4rem; }
.wtp-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(--wtp-bg-elevated); border: 1px solid var(--wtp-border);
    border-radius: var(--wtp-radius-sm); cursor: pointer; color: var(--wtp-text);
    transition: all 0.2s ease; font-family: inherit;
}
.wtp-color-btn:hover { border-color: var(--wtp-primary); }
.wtp-color-btn.active { border-color: var(--wtp-primary); background: var(--wtp-primary-light); color: var(--wtp-primary); }
.wtp-color-dot { width: 12px; height: 12px; border-radius: 50%; border: 1px solid var(--wtp-border); flex-shrink: 0; }

.wtp-value-inline { font-size: 0.78rem; font-weight: 700; color: var(--wtp-primary); }

.wtp-watermark-preview {
    display: flex; align-items: center; gap: 0.5rem;
    margin-top: 1rem; padding: 0.625rem 0.875rem;
    background: var(--wtp-bg-elevated); border-radius: var(--wtp-radius-md);
    font-size: 0.8rem; color: var(--wtp-text-muted);
    border: 1px solid var(--wtp-border);
}
.wtp-watermark-preview svg { color: var(--wtp-primary); flex-shrink: 0; }
.wtp-watermark-preview em { font-style: normal; font-weight: 600; color: var(--wtp-text); }

/* ── Output Bar (Merge) ──────────────────────────── */
.wtp-output-bar {
    display: flex; align-items: center; flex-wrap: wrap; gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--wtp-bg-secondary);
    border-top: 1px solid var(--wtp-border);
    transition: background-color var(--wtp-transition), border-color var(--wtp-transition);
}
.wtp-output-label {
    display: flex; align-items: center; gap: 0.4rem;
    font-weight: 600; font-size: 0.875rem; color: var(--wtp-text); flex-shrink: 0;
}
.wtp-output-label svg { color: var(--wtp-primary); }
.wtp-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(--wtp-bg-elevated); border: 2px solid var(--wtp-border);
    border-radius: var(--wtp-radius-full); cursor: pointer; color: var(--wtp-text);
    transition: all 0.2s ease; font-family: inherit;
}
.wtp-option-toggle:hover { border-color: var(--wtp-primary); }
.wtp-option-toggle.active { border-color: var(--wtp-primary); background: var(--wtp-primary-light); color: var(--wtp-primary); }
.wtp-option-toggle svg { width: 15px; height: 15px; color: var(--wtp-text-muted); }
.wtp-option-toggle.active svg { color: var(--wtp-primary); }
.wtp-output-desc { font-size: 0.8rem; color: var(--wtp-text-muted); margin-left: auto; }

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

/* ── Buttons ─────────────────────────────────────── */
.wtp-btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 0.5rem; padding: 0.75rem 1.5rem;
    font-size: 0.95rem; font-weight: 600;
    border-radius: var(--wtp-radius-md); cursor: pointer;
    transition: all 0.2s ease; border: none; font-family: inherit;
}
.wtp-btn-primary { background: var(--wtp-primary); color: white; box-shadow: var(--wtp-shadow-primary); }
.wtp-btn-primary:hover { background: var(--wtp-primary-dark); box-shadow: var(--wtp-shadow-primary-hover); transform: translateY(-1px); }
.wtp-btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }
.wtp-btn-secondary { background: var(--wtp-bg-elevated); color: var(--wtp-text); border: 1px solid var(--wtp-border); }
.wtp-btn-secondary:hover { background: var(--wtp-bg); border-color: var(--wtp-text-muted); }

/* ── Results ─────────────────────────────────────── */
.wtp-results-section { padding: 3rem; text-align: center; animation: wtp-fadeIn 0.4s ease; }
.wtp-results-header { margin-bottom: 1.5rem; }
.wtp-results-icon {
    width: 80px; height: 80px; background: var(--wtp-success-light);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.25rem; color: var(--wtp-success);
}
.wtp-results-header h2 { font-size: 1.6rem; font-weight: 700; color: var(--wtp-text); margin: 0 0 0.5rem; }
.wtp-results-header p  { color: var(--wtp-text-secondary); margin: 0; }

.wtp-conversion-badges { display: flex; justify-content: center; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.5rem; }
.wtp-badge-info {
    display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.35rem 0.75rem; background: var(--wtp-bg-secondary);
    border-radius: var(--wtp-radius-full); font-size: 0.78rem; color: var(--wtp-text-secondary);
    border: 1px solid var(--wtp-border);
}
.wtp-badge-info svg { color: var(--wtp-primary); width: 12px; height: 12px; }

.wtp-converted-list { display: flex; flex-direction: column; gap: 0.75rem; max-width: 600px; margin: 0 auto 2rem; }
.wtp-converted-file {
    display: flex; align-items: center; gap: 1rem;
    padding: 0.875rem 1.1rem; background: var(--wtp-bg-secondary);
    border: 1px solid var(--wtp-border); border-radius: var(--wtp-radius-md);
    text-align: left; transition: all 0.2s ease;
}
.wtp-converted-file:hover { border-color: var(--wtp-primary); }
.wtp-converted-file-icon {
    width: 40px; height: 40px; border-radius: var(--wtp-radius-sm);
    background: var(--wtp-danger); color: white;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.wtp-converted-file-icon svg { width: 18px; height: 18px; }
.wtp-converted-file-info { flex: 1; min-width: 0; }
.wtp-converted-file-name { font-weight: 600; color: var(--wtp-text); margin: 0 0 0.2rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wtp-converted-file-size { font-size: 0.8rem; color: var(--wtp-text-muted); }
.wtp-converted-file-download {
    width: 36px; height: 36px; background: var(--wtp-primary); color: white;
    border-radius: var(--wtp-radius-sm); text-decoration: none;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
    transition: all 0.2s ease;
}
.wtp-converted-file-download:hover { background: var(--wtp-primary-dark); transform: translateY(-1px); }
.wtp-converted-file-download svg { width: 16px; height: 16px; }

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

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

/* ── Processing Overlay ──────────────────────────── */
.wtp-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;
}
.wtp-overlay-card {
    background: var(--wtp-bg-elevated); border-radius: var(--wtp-radius-xl);
    padding: 2.5rem 2rem; min-width: 280px; max-width: 360px; width: 90%;
    text-align: center; box-shadow: var(--wtp-shadow-xl); border: 1px solid var(--wtp-border);
}
.wtp-overlay-ring {
    width: 48px; height: 48px; margin: 0 auto 1.25rem;
    border: 4px solid var(--wtp-border); border-top-color: var(--wtp-primary);
    border-radius: 50%; animation: wtp-spin 0.8s linear infinite;
}
.wtp-overlay-stages { display: flex; justify-content: center; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.wtp-stage {
    display: flex; align-items: center; gap: 0.3rem;
    font-size: 0.72rem; font-weight: 600;
    color: var(--wtp-text-muted); padding: 0.2rem 0.55rem;
    border-radius: var(--wtp-radius-full); background: var(--wtp-bg-secondary);
    transition: all 0.3s ease;
}
.wtp-stage.active { background: var(--wtp-primary-light); color: var(--wtp-primary); }
.wtp-stage.done   { background: var(--wtp-success-light); color: var(--wtp-success); }
.wtp-stage svg    { width: 12px; height: 12px; }
.wtp-overlay-msg  { font-size: 0.875rem; color: var(--wtp-text-secondary); margin-bottom: 1rem; min-height: 1.4em; }
.wtp-overlay-bar  { width: 100%; height: 6px; background: var(--wtp-bg-tertiary); border-radius: 3px; overflow: hidden; margin-bottom: 0.5rem; }
.wtp-overlay-bar-fill { height: 100%; width: 0%; background: var(--wtp-primary); border-radius: 3px; transition: width 0.4s ease; }
.wtp-overlay-pct  { font-size: 0.78rem; color: var(--wtp-text-muted); }

/* ── Info Section ────────────────────────────────── */
.wtp-info-section { display: flex; flex-direction: column; gap: 1.5rem; }
.wtp-info-card {
    border-radius: var(--wtp-radius-xl);
    padding: 2rem;
    background: var(--wtp-bg-elevated);
    border: 1px solid var(--wtp-border);
    box-shadow: var(--wtp-shadow-sm);
    transition: background-color var(--wtp-transition), border-color var(--wtp-transition);
}
.wtp-info-card h2 {
    display: flex; align-items: center; gap: 0.75rem;
    font-size: 1.2rem; font-weight: 700; color: var(--wtp-text); margin: 0 0 1.5rem;
}
.wtp-info-card h2 svg { color: var(--wtp-primary); }

.wtp-steps-list { list-style: none; padding: 0; margin: 0 0 1.25rem; counter-reset: wtp-steps; }
.wtp-steps-list li {
    position: relative; padding-left: 3.25rem; padding-bottom: 1rem;
    color: var(--wtp-text-secondary); line-height: 1.6; counter-increment: wtp-steps;
}
.wtp-steps-list li:last-child { padding-bottom: 0; }
.wtp-steps-list li::before {
    content: counter(wtp-steps); position: absolute; left: 0; top: 0;
    width: 1.9rem; height: 1.9rem; background: var(--wtp-primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.85rem;
}
.wtp-steps-list li:not(:last-child)::after {
    content: ''; position: absolute; left: 0.9rem; top: 2rem; bottom: 0;
    width: 2px; background: var(--wtp-border);
}
.wtp-tip {
    display: flex; align-items: flex-start; gap: 0.75rem; padding: 1rem;
    background: var(--wtp-warning-light); border-radius: var(--wtp-radius-md);
    font-size: 0.875rem; color: var(--wtp-text-secondary); line-height: 1.6;
}
.wtp-tip svg { color: var(--wtp-warning); flex-shrink: 0; margin-top: 2px; }
.wtp-tip a { color: var(--wtp-primary); font-weight: 600; text-decoration: none; }
.wtp-tip a:hover { text-decoration: underline; }

.wtp-benefits-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.wtp-benefit { display: flex; gap: 1rem; align-items: flex-start; }
.wtp-benefit-icon {
    width: 46px; height: 46px; flex-shrink: 0;
    background: var(--wtp-primary-light); border-radius: var(--wtp-radius-md);
    display: flex; align-items: center; justify-content: center; color: var(--wtp-primary);
}
.wtp-benefit h3 { font-size: 0.95rem; font-weight: 600; color: var(--wtp-text); margin: 0 0 0.25rem; }
.wtp-benefit p  { font-size: 0.875rem; color: var(--wtp-text-secondary); margin: 0; line-height: 1.5; }

.wtp-related-tools { display: flex; flex-wrap: wrap; gap: 0.625rem; }
.wtp-related-btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.6rem 1rem; background: var(--wtp-bg-secondary);
    border: 1px solid var(--wtp-border); border-radius: var(--wtp-radius-full);
    color: var(--wtp-text); text-decoration: none;
    font-size: 0.875rem; font-weight: 500; transition: all 0.2s ease;
}
.wtp-related-btn:hover { border-color: var(--wtp-primary); color: var(--wtp-primary); background: var(--wtp-primary-light); transform: translateY(-1px); }
.wtp-related-btn svg { color: var(--wtp-primary); width: 15px; height: 15px; }

.faq-section { display: flex; flex-direction: column; gap: 0.625rem; }

/* ── Spinner util ────────────────────────────────── */
.wtp-spinner {
    display: inline-block; width: 14px; height: 14px;
    border: 2px solid rgba(255,255,255,0.35); border-top-color: white;
    border-radius: 50%; animation: wtp-spin 0.7s linear infinite; vertical-align: middle;
}

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

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 900px) {
    .wtp-settings-grid { grid-template-columns: 1fr; }
    .wtp-benefits-grid { grid-template-columns: 1fr; }
    .wtp-watermark-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .wtp-container { padding: 1rem; }
    .wtp-upload-section { padding: 2rem 1.25rem; }
    .wtp-upload-area { padding: 2.5rem 1.25rem; }
    .wtp-files-list { padding: 1rem 1.25rem; }
    .wtp-settings-panel { padding: 1.25rem; }
    .wtp-output-bar { padding: 0.875rem 1.25rem; }
    .wtp-action-bar { flex-direction: column; padding: 1rem 1.25rem; }
    .wtp-btn { width: 100%; }
    .wtp-results-section { padding: 2rem 1.25rem; }
    .wtp-results-actions { flex-direction: column; }
    .wtp-results-actions .wtp-btn { width: 100%; }
    .wtp-info-card { padding: 1.25rem; }
}
@media (max-width: 480px) {
    .wtp-title-row { flex-direction: column; gap: 0.75rem; }
    .wtp-mode-toggle { flex-direction: row; flex-wrap: wrap; }
    .wtp-mode-btn { flex: 1; min-width: 0; }
}

/* Selection */
::selection { background: rgba(51,153,204,0.2); color: var(--wtp-text); }
[data-theme="dark"] ::selection { background: rgba(96,165,250,0.3); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }