/* ============================================
   PDF to Grayscale Converter v2
   Prefix: ptg- (avoids custom_styles.css conflicts)
   Features: Preview, Page Range, Brightness/Contrast, Split, Merge
   ============================================ */

:root {
    --ptg-transition: 0.25s;
    --ptg-primary: #e64e4e;
    --ptg-primary-light: #fef2f2;
    --ptg-primary-dark: #c73d3d;
    --ptg-accent: #e64e4e;
    --ptg-success: #339966;
    --ptg-success-light: #e8f5e9;
    --ptg-warning: #f59e0b;
    --ptg-warning-light: #fef3c7;
    --ptg-danger: #e64e4e;
    --ptg-danger-light: #fee2e2;
    --ptg-bg: #f5f5f5;
    --ptg-bg-elevated: #ffffff;
    --ptg-bg-secondary: #f1f5f9;
    --ptg-bg-tertiary: #e2e8f0;
    --ptg-text: #1e293b;
    --ptg-text-secondary: #475569;
    --ptg-text-muted: #64748b;
    --ptg-border: #d1d5db;
    --ptg-border-light: #e2e8f0;
    --ptg-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --ptg-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --ptg-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --ptg-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --ptg-shadow-primary: 0 4px 14px rgba(230,78,78,0.25);
    --ptg-shadow-primary-hover: 0 6px 20px rgba(230,78,78,0.35);
    --ptg-radius-sm: 6px;
    --ptg-radius-md: 12px;
    --ptg-radius-lg: 16px;
    --ptg-radius-xl: 24px;
    --ptg-radius-full: 9999px;
}

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

* { box-sizing: border-box; }

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

/* ── Layout ──────────────────────────────────────── */
.ptg-container { max-width: 1000px; margin: 0 auto; padding: 2rem; }

.ptg-header { text-align: center; margin-bottom: 2rem; }

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

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

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

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

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

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

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

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

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

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

.ptg-files-list {
    display: flex; flex-direction: column; gap: 0.75rem;
    padding: 1.5rem 2rem; max-height: 240px; overflow-y: auto;
    border-bottom: 1px solid var(--ptg-border);
}

.ptg-file-item {
    display: flex; align-items: center; gap: 1rem; padding: 0.875rem;
    background: var(--ptg-bg-secondary); border: 1px solid var(--ptg-border);
    border-radius: var(--ptg-radius-md); transition: all 0.2s ease;
}
.ptg-file-item:hover { border-color: var(--ptg-primary); background: var(--ptg-bg); }

.ptg-file-icon {
    width: 44px; height: 44px; border-radius: var(--ptg-radius-md);
    background: var(--ptg-danger-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ptg-file-icon svg { width: 22px; height: 22px; color: var(--ptg-danger); }
.ptg-file-info { flex: 1; min-width: 0; }
.ptg-file-name { font-weight: 600; color: var(--ptg-text); font-size: 0.9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 0.2rem; }
.ptg-file-meta { font-size: 0.78rem; color: var(--ptg-text-muted); }
.ptg-file-remove {
    width: 30px; height: 30px; border: none; border-radius: var(--ptg-radius-full);
    background: var(--ptg-danger-light); color: var(--ptg-danger); cursor: pointer;
    display: flex; align-items: center; justify-content: center; transition: all 0.2s ease; flex-shrink: 0;
}
.ptg-file-remove:hover { background: var(--ptg-danger); color: white; }

/* ── Preview Panel ───────────────────────────────── */
.ptg-preview-panel {
    display: flex; gap: 1.5rem; padding: 1.5rem 2rem;
    background: var(--ptg-bg-secondary);
    border-bottom: 1px solid var(--ptg-border);
    align-items: flex-start;
    transition: background-color var(--ptg-transition), border-color var(--ptg-transition);
}

.ptg-preview-thumb-wrap {
    flex-shrink: 0;
    width: 120px;
    position: relative;
}

.ptg-preview-img {
    width: 120px;
    border-radius: var(--ptg-radius-md);
    border: 1px solid var(--ptg-border);
    box-shadow: var(--ptg-shadow-md);
    display: block;
    background: var(--ptg-bg-elevated);
}

.ptg-preview-loading {
    width: 120px; height: 160px;
    border-radius: var(--ptg-radius-md);
    border: 1px dashed var(--ptg-border);
    display: flex; align-items: center; justify-content: center;
    background: var(--ptg-bg-elevated);
    flex-direction: column; gap: 0.5rem;
    color: var(--ptg-text-muted); font-size: 0.8rem;
}

.ptg-preview-loading-ring {
    width: 24px; height: 24px;
    border: 3px solid var(--ptg-border);
    border-top-color: var(--ptg-primary);
    border-radius: 50%;
    animation: ptg-spin 0.8s linear infinite;
}

.ptg-preview-info { flex: 1; }

.ptg-preview-title {
    font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.05em; color: var(--ptg-text-muted); margin-bottom: 0.5rem;
}

.ptg-preview-filename {
    font-weight: 600; font-size: 0.95rem; color: var(--ptg-text);
    margin-bottom: 0.75rem; word-break: break-all;
}

.ptg-preview-meta { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }

.ptg-meta-chip {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.3rem 0.65rem;
    background: var(--ptg-bg-elevated);
    border: 1px solid var(--ptg-border);
    border-radius: var(--ptg-radius-full);
    font-size: 0.8rem; color: var(--ptg-text-secondary);
}
.ptg-meta-chip svg { width: 12px; height: 12px; color: var(--ptg-primary); }

.ptg-page-hint {
    font-size: 0.8rem; color: var(--ptg-text-muted);
    font-style: italic;
}

/* ── Settings Panel ──────────────────────────────── */
.ptg-settings-panel { padding: 2rem; }
.ptg-panel-header { margin-bottom: 1.5rem; }
.ptg-panel-header h3 {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 1.1rem; font-weight: 600; color: var(--ptg-text); margin: 0;
}
.ptg-panel-header h3 svg { color: var(--ptg-primary); }

.ptg-settings-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 2rem; margin-bottom: 1.5rem;
}
.ptg-settings-col { display: flex; flex-direction: column; gap: 1.5rem; }

.ptg-section-label {
    display: flex; align-items: center; gap: 0.5rem;
    font-size: 0.875rem; font-weight: 600; color: var(--ptg-text); margin-bottom: 0.75rem;
}
.ptg-section-label svg { color: var(--ptg-primary); width: 16px; height: 16px; }

/* Mode Toggle */
.ptg-mode-toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

.ptg-mode-btn {
    display: flex; flex-direction: column; align-items: center; gap: 0.35rem;
    padding: 0.875rem; border: 2px solid var(--ptg-border);
    border-radius: var(--ptg-radius-md); background: var(--ptg-bg-elevated);
    cursor: pointer; transition: all 0.2s ease; text-align: center;
}
.ptg-mode-btn svg { color: var(--ptg-text-muted); transition: color 0.2s ease; }
.ptg-mode-btn .ptg-mode-label { font-weight: 600; font-size: 0.9rem; color: var(--ptg-text); }
.ptg-mode-btn .ptg-mode-desc  { font-size: 0.73rem; color: var(--ptg-text-muted); }

.ptg-mode-info {
    display: flex; gap: 0.75rem; padding: 0.875rem;
    background: var(--ptg-primary-light); border-radius: var(--ptg-radius-md);
}
.ptg-mode-info .ptg-info-icon { color: var(--ptg-primary); flex-shrink: 0; }
.ptg-mode-info .ptg-info-text { font-size: 0.875rem; color: var(--ptg-text-secondary); line-height: 1.5; }

/* Sliders */
.ptg-slider-row { display: flex; align-items: center; gap: 1rem; margin-bottom: 0.5rem; }

.ptg-quality-slider, .ptg-threshold-slider, .ptg-range-slider {
    flex: 1; height: 8px; border-radius: var(--ptg-radius-full);
    -webkit-appearance: none; appearance: none; cursor: pointer;
}
.ptg-quality-slider   { background: linear-gradient(to right, var(--ptg-text-muted), var(--ptg-primary)); }
.ptg-threshold-slider { background: linear-gradient(to right, #000, #fff); }
.ptg-range-slider     { background: linear-gradient(to right, var(--ptg-primary-light), var(--ptg-primary)); }

.ptg-quality-slider::-webkit-slider-thumb,
.ptg-threshold-slider::-webkit-slider-thumb,
.ptg-range-slider::-webkit-slider-thumb {
    -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
    background: var(--ptg-bg-elevated); border: 3px solid var(--ptg-primary);
    cursor: pointer; box-shadow: var(--ptg-shadow-md); transition: transform 0.15s ease;
}
.ptg-quality-slider::-webkit-slider-thumb:hover,
.ptg-threshold-slider::-webkit-slider-thumb:hover,
.ptg-range-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }

.ptg-quality-slider::-moz-range-thumb,
.ptg-threshold-slider::-moz-range-thumb,
.ptg-range-slider::-moz-range-thumb {
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--ptg-bg-elevated); border: 3px solid var(--ptg-primary);
    cursor: pointer; box-shadow: var(--ptg-shadow-md);
}

.ptg-value-display {
    min-width: 70px; padding: 0.45rem 0.7rem;
    background: var(--ptg-primary); color: white;
    border-radius: var(--ptg-radius-md); font-weight: 700; text-align: center; font-size: 0.875rem;
}
.ptg-value-display.accent {
    background: var(--ptg-accent);
}

.ptg-slider-labels { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--ptg-text-muted); margin-bottom: 0.875rem; }
.ptg-presets { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.ptg-preset-label { font-size: 0.85rem; color: var(--ptg-text-muted); font-weight: 500; }
.ptg-preset-btn {
    padding: 0.35rem 0.8rem; border: 1px solid var(--ptg-border);
    border-radius: var(--ptg-radius-full); background: var(--ptg-bg-elevated);
    color: var(--ptg-text); font-size: 0.82rem; font-weight: 500; cursor: pointer; transition: all 0.2s ease;
}
.ptg-preset-btn:hover { border-color: var(--ptg-primary); color: var(--ptg-primary); }
.ptg-preset-btn.active { background: var(--ptg-primary); border-color: var(--ptg-primary); color: white; }

/* ── Page Range Section ──────────────────────────── */
.ptg-page-range { display: flex; flex-direction: column; gap: 0.75rem; }

.ptg-range-toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }

.ptg-range-btn {
    padding: 0.6rem; border: 2px solid var(--ptg-border);
    border-radius: var(--ptg-radius-md); background: var(--ptg-bg-elevated);
    cursor: pointer; transition: all 0.2s ease; text-align: center;
    font-size: 0.85rem; font-weight: 600; color: var(--ptg-text);
    display: flex; align-items: center; justify-content: center; gap: 0.4rem;
}
.ptg-range-btn svg { width: 15px; height: 15px; color: var(--ptg-text-muted); transition: color 0.2s; }
.ptg-range-btn:hover { border-color: var(--ptg-primary); }
.ptg-range-btn.active { border-color: var(--ptg-primary); background: var(--ptg-primary-light); }
.ptg-range-btn.active svg { color: var(--ptg-primary); }

.ptg-range-inputs {
    display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem;
    animation: ptg-fadeIn 0.3s ease;
}

.ptg-range-input-group label {
    display: block; font-size: 0.78rem; font-weight: 600; color: var(--ptg-text-muted);
    margin-bottom: 0.35rem; text-transform: uppercase; letter-spacing: 0.04em;
}

.ptg-range-input {
    width: 100%; padding: 0.6rem 0.75rem;
    border: 1px solid var(--ptg-input-border, var(--ptg-border));
    border-radius: var(--ptg-radius-md);
    background: var(--ptg-bg-elevated); color: var(--ptg-text);
    font-size: 0.9rem; font-weight: 600; text-align: center;
    transition: all 0.2s ease;
}
.ptg-range-input:focus { outline: none; border-color: var(--ptg-primary); box-shadow: 0 0 0 3px rgba(102,102,102,0.1); }

.ptg-range-hint { font-size: 0.78rem; color: var(--ptg-text-muted); font-style: italic; }

/* ── Brightness / Contrast ───────────────────────── */
.ptg-bc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.ptg-bc-item { display: flex; flex-direction: column; gap: 0.35rem; }
.ptg-bc-label {
    display: flex; align-items: center; justify-content: space-between;
    font-size: 0.82rem; font-weight: 600; color: var(--ptg-text-muted);
}
.ptg-bc-value { font-weight: 700; color: var(--ptg-text); }

.ptg-bc-slider {
    width: 100%; height: 6px; border-radius: var(--ptg-radius-full);
    -webkit-appearance: none; appearance: none; cursor: pointer;
    background: var(--ptg-border);
    outline: none;
}

/* Dynamic gradient done via JS */
.ptg-bc-slider.brightness { background: linear-gradient(to right, #000, #fff); }
.ptg-bc-slider.contrast   {
    background: linear-gradient(to right,
        var(--ptg-bg-secondary) 0%,
        var(--ptg-primary) 50%,
        var(--ptg-text) 100%);
}

.ptg-bc-slider::-webkit-slider-thumb {
    -webkit-appearance: none; width: 18px; height: 18px; border-radius: 50%;
    background: var(--ptg-bg-elevated); border: 3px solid var(--ptg-primary);
    cursor: pointer; box-shadow: var(--ptg-shadow-sm); transition: transform 0.15s ease;
}
.ptg-bc-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.ptg-bc-slider::-moz-range-thumb {
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--ptg-bg-elevated); border: 3px solid var(--ptg-primary);
    cursor: pointer;
}

.ptg-bc-reset {
    background: none; border: none; cursor: pointer;
    font-size: 0.75rem; color: var(--ptg-accent); font-weight: 600;
    padding: 0.2rem 0; display: inline-flex; align-items: center; gap: 0.25rem;
    transition: opacity 0.2s;
}
.ptg-bc-reset:hover { opacity: 0.75; }

/* ── Output Options Row ──────────────────────────── */
.ptg-output-options {
    display: flex; flex-wrap: wrap; gap: 0.75rem;
    padding: 1.25rem 2rem;
    background: var(--ptg-bg-secondary);
    border-top: 1px solid var(--ptg-border);
    transition: background-color var(--ptg-transition), border-color var(--ptg-transition);
}

.ptg-output-label {
    display: flex; align-items: center; gap: 0.4rem;
    font-weight: 600; font-size: 0.875rem; color: var(--ptg-text);
    flex-shrink: 0; margin-right: 0.25rem;
}
.ptg-output-label svg { color: var(--ptg-primary); width: 16px; height: 16px; }

.ptg-option-toggle {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.5rem 1rem; border: 2px solid var(--ptg-border);
    border-radius: var(--ptg-radius-full); background: var(--ptg-bg-elevated);
    cursor: pointer; transition: all 0.2s ease;
    font-size: 0.85rem; font-weight: 600; color: var(--ptg-text);
}
.ptg-option-toggle svg { width: 16px; height: 16px; color: var(--ptg-text-muted); transition: color 0.2s; }
.ptg-option-toggle:hover { border-color: var(--ptg-primary); }
.ptg-option-toggle.active {
    border-color: var(--ptg-primary);
    background: var(--ptg-primary-light);
    color: var(--ptg-primary);
}
.ptg-option-toggle.active svg { color: var(--ptg-primary); }

/* merge-only: shown only when >1 file */
.ptg-merge-option { display: none; }

.ptg-option-desc {
    font-size: 0.78rem; color: var(--ptg-text-muted);
    align-self: center; margin-left: auto;
}

/* ── Benefits info ───────────────────────────────── */
.ptg-benefits-info {
    display: flex; gap: 0.75rem; padding: 1rem;
    background: var(--ptg-success-light); border-radius: var(--ptg-radius-md);
    transition: background-color var(--ptg-transition);
}
.ptg-benefits-info .ptg-info-icon { color: var(--ptg-success); flex-shrink: 0; }
.ptg-benefits-info .ptg-info-text { font-size: 0.875rem; color: var(--ptg-text-secondary); line-height: 1.5; }
.ptg-benefits-info .ptg-info-text a { color: var(--ptg-success); text-decoration: none; font-weight: 500; }
.ptg-benefits-info .ptg-info-text a:hover { text-decoration: underline; }

/* ── Action Bar ──────────────────────────────────── */
.ptg-action-bar {
    display: flex; justify-content: flex-end; gap: 1rem;
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--ptg-border);
    background: var(--ptg-bg-secondary);
    transition: background-color var(--ptg-transition), border-color var(--ptg-transition);
}

/* ── Global button reset inside ptg-container ────────
   custom_styles.css sets:
     button          { background-color: var(--accent-color) }   <- blue
     button:hover    { background-color: var(--accent-hover) }   <- darker blue
     .btn-primary    { background: var(--primary) }              <- blue
     .btn-primary:hover { background: var(--primary-dark) }      <- blue
     .btn-text       { color: var(--primary) }                   <- blue
     .btn-text:hover { background: var(--primary-light) }        <- blue
   We defeat all of them with .ptg-container parent scope.
   ──────────────────────────────────────────────────── */
.ptg-container button,
.ptg-container a.ptg-btn {
    background-color: transparent;
    color: inherit;
    box-shadow: none;
    transform: none;
}
.ptg-container button:hover,
.ptg-container a.ptg-btn:hover {
    background-color: transparent;
    box-shadow: none;
    transform: none;
}

/* ── Actual button styles (higher specificity via .ptg-container) */
.ptg-container .ptg-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.875rem 1.75rem; border-radius: var(--ptg-radius-full);
    font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: all 0.2s ease; text-decoration: none; border: none;
}
.ptg-container .ptg-btn svg { width: 18px; height: 18px; }

.ptg-container .ptg-btn-primary {
    background: var(--ptg-primary) !important;
    color: white !important;
    box-shadow: var(--ptg-shadow-primary) !important;
}
.ptg-container .ptg-btn-primary:hover {
    background: var(--ptg-primary-dark) !important;
    color: white !important;
    transform: translateY(-2px) !important;
    box-shadow: var(--ptg-shadow-primary-hover) !important;
}

.ptg-container .ptg-btn-secondary {
    background: var(--ptg-bg-elevated) !important;
    color: var(--ptg-text) !important;
    border: 1px solid var(--ptg-border) !important;
    box-shadow: none !important;
}
.ptg-container .ptg-btn-secondary:hover {
    background: var(--ptg-bg-secondary) !important;
    color: var(--ptg-text) !important;
    border-color: var(--ptg-text-muted) !important;
    transform: none !important;
    box-shadow: none !important;
}

.ptg-container .ptg-btn-text {
    background: none !important;
    border: none !important;
    color: var(--ptg-primary) !important;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    border-radius: var(--ptg-radius-md);
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-btn-text:hover {
    background: var(--ptg-primary-light) !important;
    color: var(--ptg-primary) !important;
    transform: none !important;
    box-shadow: none !important;
}

/* Mode buttons */
.ptg-container .ptg-mode-btn {
    background: var(--ptg-bg-elevated) !important;
    color: var(--ptg-text) !important;
    border: 2px solid var(--ptg-border) !important;
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-mode-btn:hover {
    background: var(--ptg-bg-elevated) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-text) !important;
    transform: none !important;
    box-shadow: none !important;
}
.ptg-container .ptg-mode-btn.active {
    background: var(--ptg-primary-light) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-text) !important;
}
.ptg-container .ptg-mode-btn.active svg { color: var(--ptg-primary) !important; }

/* Range buttons */
.ptg-container .ptg-range-btn {
    background: var(--ptg-bg-elevated) !important;
    color: var(--ptg-text) !important;
    border: 2px solid var(--ptg-border) !important;
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-range-btn:hover {
    background: var(--ptg-bg-elevated) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-text) !important;
    transform: none !important;
    box-shadow: none !important;
}
.ptg-container .ptg-range-btn.active {
    background: var(--ptg-primary-light) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-primary) !important;
}

/* Option toggles (Split / Merge) */
.ptg-container .ptg-option-toggle {
    background: var(--ptg-bg-elevated) !important;
    color: var(--ptg-text) !important;
    border: 2px solid var(--ptg-border) !important;
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-option-toggle:hover {
    background: var(--ptg-primary-light) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-primary) !important;
    transform: none !important;
    box-shadow: none !important;
}
.ptg-container .ptg-option-toggle.active {
    background: var(--ptg-primary-light) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-primary) !important;
}
.ptg-container .ptg-option-toggle:hover svg,
.ptg-container .ptg-option-toggle.active svg { color: var(--ptg-primary) !important; }

/* Preset buttons */
.ptg-container .ptg-preset-btn {
    background: var(--ptg-bg-elevated) !important;
    color: var(--ptg-text) !important;
    border: 1px solid var(--ptg-border) !important;
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-preset-btn:hover {
    background: var(--ptg-bg-elevated) !important;
    border-color: var(--ptg-primary) !important;
    color: var(--ptg-primary) !important;
    transform: none !important;
    box-shadow: none !important;
}
.ptg-container .ptg-preset-btn.active {
    background: var(--ptg-primary) !important;
    border-color: var(--ptg-primary) !important;
    color: white !important;
}

/* File remove button */
.ptg-container .ptg-file-remove {
    background: var(--ptg-danger-light) !important;
    color: var(--ptg-danger) !important;
    border: none !important;
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-file-remove:hover {
    background: var(--ptg-danger) !important;
    color: white !important;
    transform: none !important;
    box-shadow: none !important;
}

/* BC reset button */
.ptg-container .ptg-bc-reset {
    background: none !important;
    border: none !important;
    color: var(--ptg-primary) !important;
    box-shadow: none !important;
    transform: none !important;
}
.ptg-container .ptg-bc-reset:hover {
    background: none !important;
    opacity: 0.75;
    transform: none !important;
    box-shadow: none !important;
}

/* Download button (anchor styled as button) */
.ptg-container .ptg-download-btn {
    background: var(--ptg-primary) !important;
    color: white !important;
}
.ptg-container .ptg-download-btn:hover {
    background: var(--ptg-primary-dark) !important;
    color: white !important;
}

/* ── Processing Overlay (icons-analyzer pattern) ─── */
.ptg-processing-overlay {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex; align-items: center; justify-content: center;
    z-index: 9000;
    backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px);
}

.ptg-processing-card {
    background: var(--ptg-bg-elevated);
    border-radius: var(--ptg-radius-xl);
    padding: 2rem 2.5rem; text-align: center;
    box-shadow: 0 25px 60px rgba(0,0,0,0.35);
    min-width: 320px; max-width: 420px; width: 90%;
    border: 1px solid var(--ptg-border);
}

.ptg-progress-stages {
    display: flex; align-items: center; justify-content: center; gap: 0; margin-bottom: 1.75rem;
}
.ptg-stage-dot { display: flex; flex-direction: column; align-items: center; gap: 0.3rem; color: var(--ptg-text-muted); transition: color 0.3s; }
.ptg-stage-icon {
    width: 20px; height: 20px; padding: 7px;
    background: var(--ptg-bg-secondary); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s; box-sizing: content-box;
}
.ptg-stage-icon svg { width: 14px; height: 14px; display: block; }
.ptg-stage-dot span { font-size: 0.65rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.ptg-stage-dot.active .ptg-stage-icon { background: var(--ptg-primary); color: #fff; }
.ptg-stage-dot.active                  { color: var(--ptg-primary); }
.ptg-stage-dot.done .ptg-stage-icon   { background: var(--ptg-success); color: #fff; }
.ptg-stage-dot.done                    { color: var(--ptg-success); }
.ptg-stage-connector { width: 28px; height: 2px; background: var(--ptg-border); margin: 0 0.25rem 1.1rem; flex-shrink: 0; }

.ptg-css-spinner {
    width: 44px; height: 44px;
    border: 4px solid var(--ptg-border);
    border-top-color: var(--ptg-primary);
    border-radius: 50%;
    animation: ptg-spin 0.8s linear infinite;
    margin: 0 auto 1.25rem;
}
@keyframes ptg-spin { to { transform: rotate(360deg); } }

.ptg-progress-bar-wrap {
    height: 6px; background: var(--ptg-border);
    border-radius: var(--ptg-radius-full); overflow: hidden; margin-bottom: 0.875rem;
}
.ptg-progress-bar-fill {
    height: 100%; background: var(--ptg-primary); width: 0%;
    transition: width 0.4s ease; border-radius: var(--ptg-radius-full);
}
.ptg-processing-status { font-size: 0.9rem; font-weight: 500; color: var(--ptg-text); margin: 0 0 0.25rem; }
.ptg-progress-pct { font-size: 0.82rem; color: var(--ptg-text-muted); margin: 0; }

/* ── Results ─────────────────────────────────────── */
.ptg-results-section { padding: 2.5rem; text-align: center; animation: ptg-fadeIn 0.4s ease; }
.ptg-results-header { margin-bottom: 2rem; }

.ptg-success-icon {
    width: 72px; height: 72px; background: var(--ptg-success); border-radius: var(--ptg-radius-full);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.25rem; color: white;
}
.ptg-success-icon svg { width: 36px; height: 36px; }
.ptg-results-header h2 { font-size: 1.75rem; color: var(--ptg-text); margin: 0 0 0.5rem 0; }
.ptg-results-header p  { color: var(--ptg-text-muted); margin: 0; }

.ptg-converted-list { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 2rem; text-align: left; }

.ptg-converted-item {
    display: flex; align-items: center; gap: 1rem; padding: 1rem 1.25rem;
    background: var(--ptg-bg-secondary); border: 1px solid var(--ptg-border);
    border-radius: var(--ptg-radius-md); transition: all 0.2s ease;
}
.ptg-converted-item:hover { border-color: var(--ptg-primary); }

.ptg-converted-icon {
    width: 44px; height: 44px; border-radius: var(--ptg-radius-md);
    background: var(--ptg-primary-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ptg-converted-icon svg { width: 22px; height: 22px; color: var(--ptg-primary); }
.ptg-converted-info { flex: 1; min-width: 0; }
.ptg-converted-name { font-weight: 600; font-size: 0.9rem; color: var(--ptg-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 0.25rem; }
.ptg-converted-meta { display: flex; align-items: center; gap: 0.75rem; font-size: 0.78rem; color: var(--ptg-text-muted); }
.ptg-size-reduction { color: var(--ptg-success); font-weight: 600; }
.ptg-size-increase  { color: var(--ptg-danger); font-weight: 600; }

.ptg-download-btn {
    display: flex; align-items: center; gap: 0.35rem;
    padding: 0.5rem 1rem; background: var(--ptg-primary); color: white;
    border-radius: var(--ptg-radius-md); text-decoration: none;
    font-size: 0.85rem; font-weight: 600; transition: all 0.2s ease; flex-shrink: 0;
}
.ptg-download-btn:hover { background: var(--ptg-primary-dark); }

.ptg-results-stats { display: flex; justify-content: center; align-items: center; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.ptg-stat { text-align: center; }
.ptg-stat-label { display: block; font-size: 0.78rem; color: var(--ptg-text-muted); margin-bottom: 0.25rem; text-transform: uppercase; letter-spacing: 0.5px; }
.ptg-stat-value { font-size: 1.25rem; font-weight: 700; color: var(--ptg-text); }
.ptg-stat.highlight .ptg-stat-value { color: var(--ptg-primary); }
.ptg-stat.savings .ptg-stat-value   { color: var(--ptg-success); }
.ptg-stat-arrow { color: var(--ptg-text-muted); }

.ptg-conversion-info { margin-bottom: 1.5rem; }
.ptg-info-badge {
    display: inline-flex; align-items: center; gap: 0.35rem;
    padding: 0.45rem 0.9rem; background: var(--ptg-bg-secondary);
    border-radius: var(--ptg-radius-full); font-size: 0.82rem; color: var(--ptg-text-secondary); margin: 0.25rem;
}
.ptg-info-badge svg { color: var(--ptg-primary); width: 13px; height: 13px; }

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

/* ── Error ───────────────────────────────────────── */
.ptg-error {
    display: flex; align-items: flex-start; gap: 0.75rem;
    background: var(--ptg-danger-light); border: 1px solid var(--ptg-danger);
    padding: 1rem 1.25rem; border-radius: var(--ptg-radius-md); margin: 1.25rem;
}
.ptg-error svg { color: var(--ptg-danger); flex-shrink: 0; margin-top: 2px; }
.ptg-error-body { flex: 1; }
.ptg-error-title  { font-weight: 600; color: var(--ptg-danger); margin: 0 0 0.25rem; font-size: 0.95rem; }
.ptg-error-detail { color: var(--ptg-danger); margin: 0 0 0.5rem; font-size: 0.875rem; opacity: 0.9; }
.ptg-error-contact { font-size: 0.82rem; color: var(--ptg-text-secondary); margin: 0; }
.ptg-error-contact a { color: var(--ptg-accent); font-weight: 600; text-decoration: none; }
.ptg-error-contact a:hover { text-decoration: underline; }

/* ── Related Tools ───────────────────────────────── */
.ptg-related-tools {
    display: flex; align-items: center; flex-wrap: wrap; gap: 1rem;
    padding: 1.25rem 1.5rem; background: var(--ptg-bg-elevated);
    border-radius: var(--ptg-radius-lg); margin-bottom: 2rem;
    border: 1px solid var(--ptg-border); box-shadow: var(--ptg-shadow-sm);
}
.ptg-related-label { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; color: var(--ptg-text); font-size: 0.875rem; }
.ptg-related-label svg { color: var(--ptg-primary); width: 16px; height: 16px; }
.ptg-related-links { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.ptg-related-link {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.5rem 1rem; background: var(--ptg-bg-secondary);
    border-radius: var(--ptg-radius-full); color: var(--ptg-text-secondary);
    text-decoration: none; font-size: 0.875rem; font-weight: 500;
    transition: all 0.2s ease; border: 1px solid var(--ptg-border);
}
.ptg-related-link:hover { background: var(--ptg-primary); color: white; border-color: var(--ptg-primary); transform: translateY(-2px); }
.ptg-related-link svg { width: 16px; height: 16px; }

/* ── Info Cards ──────────────────────────────────── */
.ptg-info-sections { display: flex; flex-direction: column; gap: 1.5rem; }
.ptg-info-card {
    background: var(--ptg-bg-elevated); border-radius: var(--ptg-radius-xl);
    padding: 2rem; box-shadow: var(--ptg-shadow-md); border: 1px solid var(--ptg-border);
    transition: background-color var(--ptg-transition), border-color var(--ptg-transition);
}
.ptg-info-card h2 { display: flex; align-items: center; gap: 0.75rem; font-size: 1.3rem; color: var(--ptg-text); margin: 0 0 1.5rem 0; }
.ptg-info-card h2 svg { color: var(--ptg-primary); width: 24px; height: 24px; }

.ptg-steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.ptg-steps li { position: relative; padding-left: 3.25rem; margin-bottom: 1rem; counter-increment: step; color: var(--ptg-text-secondary); line-height: 1.6; }
.ptg-steps li:not(:last-child)::after { content: ''; position: absolute; left: calc(1rem - 1px); top: 2rem; bottom: 0; width: 2px; background: var(--ptg-primary-light); }
.ptg-steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 2rem; height: 2rem; background: var(--ptg-primary); color: white; border-radius: var(--ptg-radius-full); display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 0.875rem; z-index: 1; }
.ptg-steps li:last-child { margin-bottom: 0; }
.ptg-steps li a { color: var(--ptg-accent); text-decoration: none; }
.ptg-steps li a:hover { text-decoration: underline; }

.ptg-tip {
    display: flex; align-items: flex-start; gap: 0.75rem; margin-top: 1.5rem;
    padding: 1rem 1.25rem; background: var(--ptg-warning-light); border-radius: var(--ptg-radius-md);
    font-size: 0.875rem; color: var(--ptg-text-secondary); line-height: 1.6;
}
.ptg-tip svg { color: var(--ptg-warning); flex-shrink: 0; margin-top: 2px; }
.ptg-tip a { color: var(--ptg-warning); font-weight: 600; text-decoration: none; }
.ptg-tip a:hover { text-decoration: underline; }

.ptg-benefits-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.ptg-benefit-item { display: flex; gap: 1rem; align-items: flex-start; }
.ptg-benefit-icon { width: 44px; height: 44px; background: var(--ptg-primary-light); border-radius: var(--ptg-radius-md); display: flex; align-items: center; justify-content: center; color: var(--ptg-primary); flex-shrink: 0; }
.ptg-benefit-content h4 { margin: 0 0 0.35rem; font-size: 1rem; color: var(--ptg-text); }
.ptg-benefit-content p  { margin: 0; font-size: 0.875rem; color: var(--ptg-text-secondary); line-height: 1.5; }
.ptg-benefit-content a  { color: var(--ptg-accent); text-decoration: none; }
.ptg-benefit-content a:hover { text-decoration: underline; }

.ptg-comparison { display: flex; flex-direction: column; gap: 1rem; }
.ptg-compare-row { display: flex; align-items: flex-start; gap: 1rem; }
.ptg-compare-tag { flex-shrink: 0; padding: 0.4rem 1rem; border-radius: var(--ptg-radius-full); font-size: 0.85rem; font-weight: 600; white-space: nowrap; color: white; }
.ptg-compare-tag.gray { background: #64748b; }
.ptg-compare-tag.bw   { background: #1a1a1a; }
[data-theme="dark"] .ptg-compare-tag.bw { background: #e5e5e5; color: #1a1a1a; }
.ptg-compare-row p { margin: 0; color: var(--ptg-text-secondary); line-height: 1.6; }
.ptg-compare-row p a { color: var(--ptg-accent); text-decoration: none; }
.ptg-compare-row p a:hover { text-decoration: underline; }

.faq-item { border: 1px solid var(--ptg-border); border-radius: var(--ptg-radius-md); overflow: hidden; }
.faq-question {
    width: 100%; display: flex; justify-content: space-between; align-items: center;
    padding: 1rem 1.25rem; background: var(--ptg-bg-secondary); border: none;
    cursor: pointer; font-size: 0.975rem; font-weight: 500; color: var(--ptg-text); text-align: left;
    transition: all 0.2s ease;
}
.faq-question:hover { background: var(--ptg-bg-tertiary); }
.faq-question svg { flex-shrink: 0; color: var(--ptg-primary); width: 20px; height: 20px; transition: transform 0.3s ease; }
.faq-item.open .faq-question svg { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer p { margin: 0; color: var(--ptg-text-secondary); line-height: 1.7; background: var(--ptg-bg-elevated); }
.faq-answer a { color: var(--ptg-accent); text-decoration: none; }
.faq-answer a:hover { text-decoration: underline; }
.ptg-faq-list { display: flex; flex-direction: column; gap: 0.75rem; }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 900px) {
    .ptg-settings-grid, .ptg-benefits-grid { grid-template-columns: 1fr; }
    .ptg-bc-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .ptg-container { padding: 1rem; }
    .ptg-title-row  { gap: 0.75rem; }
    .ptg-icon-wrapper { width: 50px; height: 50px; }
    .ptg-upload-section { padding: 2rem 1.5rem; }
    .ptg-upload-area { padding: 2.5rem 1.5rem; }
    .ptg-files-list { padding: 1rem 1.5rem; }
    .ptg-preview-panel { flex-direction: column; }
    .ptg-preview-thumb-wrap { width: 100%; display: flex; justify-content: center; }
    .ptg-preview-img { width: 140px; }
    .ptg-preview-loading { width: 140px; }
    .ptg-settings-panel { padding: 1.5rem; }
    .ptg-mode-toggle { grid-template-columns: 1fr; }
    .ptg-range-toggle { grid-template-columns: 1fr; }
    .ptg-range-inputs { grid-template-columns: 1fr; }
    .ptg-action-bar { flex-direction: column; padding: 1.25rem; }
    .ptg-btn { width: 100%; }
    .ptg-results-section { padding: 2rem 1.5rem; }
    .ptg-converted-item { flex-wrap: wrap; }
    .ptg-download-btn { width: 100%; margin-top: 0.5rem; justify-content: center; }
    .ptg-results-stats { flex-direction: column; gap: 1rem; }
    .ptg-stat-arrow { transform: rotate(90deg); }
    .ptg-results-actions { flex-direction: column; }
    .ptg-results-actions .ptg-btn { width: 100%; }
    .ptg-related-tools { flex-direction: column; align-items: flex-start; }
    .ptg-compare-row { flex-direction: column; gap: 0.5rem; }
    .ptg-info-card { padding: 1.5rem; }
    .ptg-output-options { padding: 1rem 1.5rem; }
}
@media (max-width: 480px) {
    .ptg-title-row { flex-direction: column; }
    .ptg-presets { justify-content: center; }
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--ptg-bg); border-radius: 4px; }
::-webkit-scrollbar-thumb { background: var(--ptg-text-muted); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--ptg-text-secondary); }

@keyframes ptg-fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

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