/* ============================================
   PNG to BMP Converter (pbc-)
   Light Mode Default + Dark Mode Support
   Blue Theme (BMP/Windows-related)
   ============================================ */

/* CSS Variables - Light Mode (Default) */
:root {
    --pbc-primary: #3399cc;
    --pbc-primary-light: #e0f2fe;
    --pbc-primary-dark: #2980b9;
    --pbc-success: #339966;
    --pbc-success-light: #d1fae5;
    --pbc-warning: #f59e0b;
    --pbc-warning-light: #fef3c7;
    --pbc-danger: #e64e4e;
    --pbc-danger-light: #fee2e2;

    --pbc-bg: #f0f9ff;
    --pbc-bg-elevated: #ffffff;
    --pbc-bg-secondary: #f1f5f9;
    --pbc-bg-tertiary: #e2e8f0;

    --pbc-text: #1e293b;
    --pbc-text-secondary: #475569;
    --pbc-text-muted: #64748b;

    --pbc-border: #cbd5e1;
    --pbc-border-light: #e2e8f0;

    --pbc-shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --pbc-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08);
    --pbc-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08);

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

    --pbc-transition: 0.25s;
}

/* Dark Mode */
[data-theme="dark"] {
    --pbc-primary: #60a5fa;
    --pbc-primary-light: rgba(96, 165, 250, 0.15);
    --pbc-primary-dark: #3b82f6;
    --pbc-success: #34d399;
    --pbc-success-light: rgba(52, 211, 153, 0.15);
    --pbc-warning: #fbbf24;
    --pbc-warning-light: rgba(251, 191, 36, 0.15);
    --pbc-danger: #f87171;
    --pbc-danger-light: rgba(248, 113, 113, 0.15);

    --pbc-bg: #0f172a;
    --pbc-bg-elevated: #1e293b;
    --pbc-bg-secondary: #334155;
    --pbc-bg-tertiary: #475569;

    --pbc-text: #f1f5f9;
    --pbc-text-secondary: #cbd5e1;
    --pbc-text-muted: #94a3b8;

    --pbc-border: #475569;
    --pbc-border-light: #334155;

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

/* ============================================
   CRITICAL OVERRIDES (custom_styles.css conflicts)
   ============================================ */
.tool-main {
    overflow: visible !important;
}

/* ============================================
   TOOL CONTAINER
   ============================================ */
.tool-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

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

.tool-title {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--pbc-text);
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
}

.tool-title i {
    color: var(--pbc-primary);
    flex-shrink: 0;
}

.tool-description {
    font-size: 1.05rem;
    color: var(--pbc-text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.tool-description a {
    color: var(--pbc-primary);
    text-decoration: none;
    font-weight: 500;
}

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

/* Main Tool */
.tool-main {
    background: var(--pbc-bg-elevated);
    border-radius: var(--pbc-radius-xl);
    box-shadow: var(--pbc-shadow-lg);
    border: 1px solid var(--pbc-border);
    transition: background-color var(--pbc-transition), border-color var(--pbc-transition);
}

/* ============================================
   UPLOAD SECTION
   ============================================ */
.pbc-upload-section {
    padding: 2.5rem;
}

.pbc-upload-area {
    border: 2px dashed var(--pbc-border);
    border-radius: var(--pbc-radius-lg);
    padding: 3rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--pbc-transition);
    background: var(--pbc-bg-secondary);
}

.pbc-upload-area:hover,
.pbc-upload-area.dragover {
    border-color: var(--pbc-primary);
    background: var(--pbc-primary-light);
}

.pbc-upload-icon {
    color: var(--pbc-primary);
    margin-bottom: 1.25rem;
    display: flex;
    justify-content: center;
}

.pbc-upload-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--pbc-text);
    margin: 0 0 0.5rem;
}

.pbc-upload-subtitle {
    color: var(--pbc-text-muted);
    margin: 0 0 1.5rem;
    font-size: 0.95rem;
}

.pbc-upload-hints {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.pbc-hint {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    background: var(--pbc-bg-elevated);
    color: var(--pbc-text-muted);
    border: 1px solid var(--pbc-border);
    border-radius: var(--pbc-radius-full);
    font-size: 0.825rem;
}

.pbc-hint i {
    color: var(--pbc-primary);
    flex-shrink: 0;
}

/* ============================================
   EDITOR SECTION
   ============================================ */
.pbc-editor-section {
    padding: 0;
}

/* Files Header */
.pbc-files-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--pbc-bg-secondary);
    border-bottom: 1px solid var(--pbc-border-light);
    border-top-left-radius: var(--pbc-radius-xl);
    border-top-right-radius: var(--pbc-radius-xl);
}

.pbc-files-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--pbc-text);
    font-size: 0.9rem;
}

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

.pbc-btn-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: none;
    border: none;
    color: var(--pbc-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.35rem 0.6rem;
    border-radius: var(--pbc-radius-sm);
    transition: background-color var(--pbc-transition);
}

.pbc-btn-link:hover {
    background: var(--pbc-primary-light);
}

/* File List */
.pbc-file-list {
    padding: 1rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    max-height: 320px;
    overflow-y: auto;
}

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

.pbc-file-row:hover {
    border-color: var(--pbc-primary);
}

.pbc-file-thumb {
    width: 44px;
    height: 44px;
    border-radius: var(--pbc-radius-sm);
    background:
        linear-gradient(45deg, #e5e7eb 25%, transparent 25%),
        linear-gradient(-45deg, #e5e7eb 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e5e7eb 75%),
        linear-gradient(-45deg, transparent 75%, #e5e7eb 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
    flex-shrink: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--pbc-border);
}

.pbc-file-thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.pbc-file-thumb i {
    color: var(--pbc-text-muted);
}

.pbc-file-meta {
    flex: 1;
    min-width: 0;
}

.pbc-file-name {
    font-weight: 600;
    color: var(--pbc-text);
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.15rem;
}

.pbc-file-info {
    display: flex;
    gap: 0.75rem;
    font-size: 0.8rem;
    color: var(--pbc-text-muted);
    flex-wrap: wrap;
}

.pbc-file-info span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.pbc-file-remove {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--pbc-radius-full);
    background: var(--pbc-danger-light);
    color: var(--pbc-danger);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--pbc-transition);
    flex-shrink: 0;
}

.pbc-file-remove:hover {
    background: var(--pbc-danger);
    color: white;
}

/* ============================================
   SETTINGS PANEL
   ============================================ */
.pbc-settings-panel {
    padding: 1.5rem 2rem 2rem;
    border-top: 1px solid var(--pbc-border-light);
}

.pbc-panel-header {
    margin-bottom: 1.25rem;
}

.pbc-panel-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--pbc-text);
    margin: 0;
}

.pbc-panel-header h3 i {
    color: var(--pbc-primary);
}

.pbc-section-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--pbc-text);
    margin-bottom: 0.75rem;
}

.pbc-section-label i {
    color: var(--pbc-primary);
}

.pbc-quality-section {
    margin-bottom: 1.25rem;
}

/* Preset Grid */
.pbc-preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.625rem;
}

.pbc-preset-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 0.875rem;
    background: var(--pbc-bg-secondary);
    border: 2px solid var(--pbc-border-light);
    border-radius: var(--pbc-radius-md);
    cursor: pointer;
    transition: all var(--pbc-transition);
    text-align: left;
    min-width: 0;
}

.pbc-preset-card:hover {
    border-color: var(--pbc-primary);
}

.pbc-preset-card.active {
    border-color: var(--pbc-primary);
    background: var(--pbc-primary-light);
}

.pbc-preset-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: var(--pbc-primary);
    color: white;
    border-radius: var(--pbc-radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.pbc-preset-label {
    font-weight: 600;
    color: var(--pbc-text);
    font-size: 0.9rem;
    margin-bottom: 0.15rem;
}

.pbc-preset-desc {
    font-size: 0.75rem;
    color: var(--pbc-text-muted);
}

/* Options Grid */
.pbc-options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1.25rem;
}

.pbc-option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0;
}

.pbc-option-group label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--pbc-text);
}

.pbc-option-group label i {
    color: var(--pbc-primary);
}

.pbc-select {
    width: 100%;
    padding: 0.625rem 2.25rem 0.625rem 0.875rem;
    border-radius: var(--pbc-radius-md);
    border: 1px solid var(--pbc-border);
    background-color: var(--pbc-bg-elevated);
    color: var(--pbc-text);
    font-size: 0.9rem;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    cursor: pointer;
    transition: border-color var(--pbc-transition);
}

.pbc-select:hover {
    border-color: var(--pbc-primary);
}

.pbc-select:focus {
    outline: none;
    border-color: var(--pbc-primary);
    box-shadow: 0 0 0 3px var(--pbc-primary-light);
}

/* Color Picker */
.pbc-color-row {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-top: 0.5rem;
}

.pbc-color-picker {
    width: 44px;
    height: 36px;
    border: 1px solid var(--pbc-border);
    border-radius: var(--pbc-radius-sm);
    padding: 2px;
    cursor: pointer;
    background: transparent;
}

.pbc-color-picker::-webkit-color-swatch-wrapper { padding: 0; }
.pbc-color-picker::-webkit-color-swatch { border: none; border-radius: 4px; }

.pbc-color-hex {
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--pbc-text-secondary);
    padding: 0.35rem 0.6rem;
    background: var(--pbc-bg-secondary);
    border-radius: var(--pbc-radius-sm);
}

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

.pbc-info-note i {
    flex-shrink: 0;
    color: var(--pbc-warning);
    margin-top: 0.15rem;
}

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

.pbc-info-note a:hover {
    text-decoration: underline;
}

/* Action Bar */
.pbc-action-bar {
    display: flex;
    gap: 0.75rem;
    padding: 1.25rem 2rem 2rem;
    justify-content: center;
}

/* ============================================
   BUTTONS
   ============================================ */
.pbc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--pbc-radius-full);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--pbc-transition);
    border: none;
    text-decoration: none;
}

.pbc-btn-primary {
    background: var(--pbc-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(51, 153, 204, 0.25);
}

.pbc-btn-primary:hover:not(:disabled) {
    background: var(--pbc-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(51, 153, 204, 0.35);
}

.pbc-btn-primary:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

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

.pbc-btn-secondary:hover {
    background: var(--pbc-bg-tertiary);
    border-color: var(--pbc-primary);
    color: var(--pbc-primary);
}

.pbc-btn-success {
    background: var(--pbc-success);
    color: white;
    box-shadow: 0 2px 8px rgba(51, 153, 102, 0.25);
}

.pbc-btn-success:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

/* ============================================
   RESULTS SECTION
   ============================================ */
.pbc-results-section {
    padding: 2.5rem 2rem;
    text-align: center;
}

.pbc-results-icon {
    width: 72px;
    height: 72px;
    background: var(--pbc-success-light);
    color: var(--pbc-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.pbc-results-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--pbc-text);
    margin: 0 0 0.4rem;
}

.pbc-results-subtitle {
    color: var(--pbc-text-muted);
    margin: 0 0 1.75rem;
}

.pbc-results-stats {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
    padding: 1.25rem;
    background: var(--pbc-bg-secondary);
    border-radius: var(--pbc-radius-md);
    flex-wrap: wrap;
}

.pbc-stat {
    text-align: center;
    min-width: 90px;
}

.pbc-stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--pbc-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
}

.pbc-stat-value {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--pbc-text);
}

.pbc-stat-divider {
    color: var(--pbc-text-muted);
    display: flex;
    align-items: center;
}

.pbc-results-files {
    margin: 1.25rem 0;
    text-align: left;
    max-height: 240px;
    overflow-y: auto;
    border: 1px solid var(--pbc-border-light);
    border-radius: var(--pbc-radius-md);
}

.pbc-results-file-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--pbc-border-light);
    background: var(--pbc-bg-elevated);
}

.pbc-results-file-row:last-child {
    border-bottom: none;
}

.pbc-results-file-icon {
    color: var(--pbc-primary);
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: var(--pbc-primary-light);
    border-radius: var(--pbc-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.pbc-results-file-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--pbc-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pbc-results-file-size {
    font-size: 0.78rem;
    color: var(--pbc-text-muted);
}

.pbc-results-file-link {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: var(--pbc-radius-sm);
    background: var(--pbc-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: background-color var(--pbc-transition);
}

.pbc-results-file-link:hover {
    background: var(--pbc-primary-dark);
}

.pbc-results-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.25rem;
}

/* ============================================
   ERROR MESSAGE
   ============================================ */
.pbc-error-message {
    display: flex !important;
    align-items: flex-start;
    gap: 0.75rem;
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    background: var(--pbc-danger-light);
    border: 1px solid var(--pbc-danger);
    border-radius: var(--pbc-radius-md);
    color: var(--pbc-text);
}

.pbc-error-message[style*="display: none"] {
    display: none !important;
}

.pbc-error-message > i {
    flex-shrink: 0;
    color: var(--pbc-danger);
    margin-top: 0.1rem;
}

.pbc-error-body {
    flex: 1;
    min-width: 0;
}

.pbc-error-text {
    font-weight: 600;
    color: var(--pbc-danger);
    margin-bottom: 0.25rem;
}

.pbc-error-contact {
    font-size: 0.85rem;
    color: var(--pbc-text-secondary);
}

.pbc-error-contact a {
    color: var(--pbc-primary);
    font-weight: 600;
    text-decoration: none;
}

.pbc-error-contact a:hover {
    text-decoration: underline;
}

.pbc-error-close {
    background: none;
    border: none;
    color: var(--pbc-text-muted);
    cursor: pointer;
    padding: 0.25rem;
    flex-shrink: 0;
    opacity: 0.7;
    transition: opacity var(--pbc-transition);
}

.pbc-error-close:hover {
    opacity: 1;
}

/* ============================================
   PROCESSING OVERLAY (compress-gif pattern)
   ============================================ */
.pbc-processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex !important;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    backdrop-filter: blur(4px);
}

.pbc-processing-overlay[style*="display: none"] {
    display: none !important;
}

.pbc-processing-card {
    background: var(--pbc-bg-elevated);
    padding: 2rem;
    border-radius: var(--pbc-radius-xl);
    text-align: center;
    min-width: 340px;
    max-width: 90%;
    width: 420px;
    border: 1px solid var(--pbc-border);
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}

.pbc-processing-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--pbc-text);
    margin-bottom: 1.5rem;
}

/* Stages */
.pbc-stage-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 1.5rem;
}

.pbc-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.pbc-stage-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    padding: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pbc-bg-secondary);
    color: var(--pbc-text-muted);
    border: 2px solid var(--pbc-border);
    transition: all 0.3s ease;
}

.pbc-stage.active .pbc-stage-dot {
    background: var(--pbc-primary);
    color: white;
    border-color: var(--pbc-primary);
    animation: pbc-pulse 1.5s ease-in-out infinite;
}

.pbc-stage.done .pbc-stage-dot {
    background: var(--pbc-success);
    color: white;
    border-color: var(--pbc-success);
}

@keyframes pbc-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(51, 153, 204, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(51, 153, 204, 0); }
}

.pbc-stage-label {
    font-size: 0.75rem;
    color: var(--pbc-text-muted);
    font-weight: 500;
}

.pbc-stage.active .pbc-stage-label,
.pbc-stage.done .pbc-stage-label {
    color: var(--pbc-text);
}

.pbc-stage-connector {
    width: 28px;
    height: 2px;
    background: var(--pbc-border);
    margin: 0 4px;
    margin-bottom: 1.1rem;
}

/* Progress Bar */
.pbc-progress-track {
    height: 8px;
    background: var(--pbc-bg-secondary);
    border-radius: var(--pbc-radius-full);
    overflow: hidden;
    margin-bottom: 0.75rem;
}

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

.pbc-progress-meta {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    align-items: center;
}

.pbc-progress-pct {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--pbc-primary);
}

.pbc-progress-status {
    font-size: 0.85rem;
    color: var(--pbc-text-muted);
    min-height: 1.2em;
}

/* ============================================
   RELATED TOOLS
   ============================================ */
.pbc-related-tools {
    max-width: 1000px;
    margin: 0 auto 2rem;
    padding: 0 1rem;
}

.pbc-related-tools-box {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--pbc-bg-elevated);
    border: 1px solid var(--pbc-border);
    border-radius: var(--pbc-radius-lg);
    box-shadow: var(--pbc-shadow-sm);
}

.pbc-related-label {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-weight: 600;
    color: var(--pbc-text);
    font-size: 0.9rem;
    white-space: nowrap;
}

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

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

.pbc-related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.9rem;
    background: var(--pbc-bg-secondary);
    border: 1px solid var(--pbc-border-light);
    border-radius: var(--pbc-radius-full);
    color: var(--pbc-text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--pbc-transition);
}

.pbc-related-link:hover {
    background: var(--pbc-primary);
    color: white;
    border-color: var(--pbc-primary);
}

.pbc-related-link i {
    flex-shrink: 0;
}

/* ============================================
   INFO SECTIONS (info-cards only, no wrapper styling)
   ============================================ */
.pbc-info-sections {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem 2rem;
    display: grid;
    gap: 1.5rem;
}

.pbc-info-card {
    background: var(--pbc-bg-elevated);
    border: 1px solid var(--pbc-border);
    border-radius: var(--pbc-radius-lg);
    padding: 1.75rem;
    transition: background-color var(--pbc-transition), border-color var(--pbc-transition);
}

.pbc-info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--pbc-text);
    margin: 0 0 1.1rem;
}

.pbc-info-card h2 i {
    color: var(--pbc-primary);
    flex-shrink: 0;
}

.pbc-info-card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--pbc-text);
    margin: 1rem 0 0.7rem;
}

.pbc-info-card h3 i {
    color: var(--pbc-primary);
    flex-shrink: 0;
}

.pbc-info-card p {
    color: var(--pbc-text-secondary);
    line-height: 1.7;
    margin: 0 0 0.85rem;
}

.pbc-info-card p:last-child {
    margin-bottom: 0;
}

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

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

.pbc-info-card code {
    background: var(--pbc-bg-secondary);
    padding: 0.1rem 0.4rem;
    border-radius: var(--pbc-radius-sm);
    font-size: 0.88em;
    color: var(--pbc-primary-dark);
}

[data-theme="dark"] .pbc-info-card code {
    color: var(--pbc-primary);
}

/* Steps List */
.pbc-steps-list {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
}

.pbc-steps-list li {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 1rem;
    line-height: 1.6;
    color: var(--pbc-text-secondary);
}

.pbc-steps-list li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 28px;
    height: 28px;
    background: var(--pbc-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
}

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

/* Compare Grid */
.pbc-compare-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.pbc-compare-col {
    padding: 1.25rem;
    background: var(--pbc-bg-secondary);
    border-radius: var(--pbc-radius-md);
    min-width: 0;
}

.pbc-compare-col h3 {
    margin-top: 0;
    margin-bottom: 0.75rem;
}

.pbc-compare-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.pbc-compare-list li {
    display: flex;
    gap: 0.5rem;
    padding: 0.4rem 0;
    font-size: 0.9rem;
    color: var(--pbc-text-secondary);
    line-height: 1.5;
}

.pbc-compare-list li i {
    flex-shrink: 0;
    color: var(--pbc-success);
    margin-top: 0.15rem;
}

/* Depth Grid */
.pbc-depth-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 0.875rem;
    margin-top: 1rem;
}

.pbc-depth-item {
    display: flex;
    gap: 0.875rem;
    align-items: flex-start;
    padding: 0.875rem;
    background: var(--pbc-bg-secondary);
    border-radius: var(--pbc-radius-md);
    min-width: 0;
}

.pbc-depth-item > div {
    flex: 1;
    min-width: 0;
}

.pbc-depth-tag {
    flex-shrink: 0;
    padding: 0.3rem 0.65rem;
    border-radius: var(--pbc-radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    min-width: 56px;
    text-align: center;
}

.pbc-tag-high { background: var(--pbc-primary); }
.pbc-tag-medium { background: var(--pbc-success); }
.pbc-tag-low { background: var(--pbc-warning); }

.pbc-depth-item strong {
    display: block;
    color: var(--pbc-text);
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}

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

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

.pbc-feature-item {
    padding: 1.1rem;
    background: var(--pbc-bg-secondary);
    border-radius: var(--pbc-radius-md);
    min-width: 0;
}

.pbc-feature-item i {
    color: var(--pbc-primary);
    margin-bottom: 0.6rem;
    display: block;
}

.pbc-feature-item h4 {
    margin: 0 0 0.3rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--pbc-text);
}

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

/* Use Case List */
.pbc-usecase-list {
    margin: 0 0 0.85rem;
    padding-left: 1.25rem;
}

.pbc-usecase-list li {
    color: var(--pbc-text-secondary);
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.pbc-usecase-list strong {
    color: var(--pbc-text);
}

/* FAQ */
.pbc-faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.pbc-faq-item {
    background: var(--pbc-bg-secondary);
    border: 1px solid var(--pbc-border-light);
    border-radius: var(--pbc-radius-md);
    overflow: hidden;
    transition: border-color var(--pbc-transition);
}

.pbc-faq-item:hover {
    border-color: var(--pbc-primary);
}

.pbc-faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--pbc-text);
    text-align: left;
    transition: background-color var(--pbc-transition);
}

.pbc-faq-question:hover {
    background: var(--pbc-bg-tertiary);
}

.pbc-faq-question i {
    color: var(--pbc-text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.pbc-faq-item.active .pbc-faq-question i {
    transform: rotate(180deg);
    color: var(--pbc-primary);
}

.pbc-faq-answer {
    display: none;
    padding: 0 1.25rem 1rem;
}

.pbc-faq-item.active .pbc-faq-answer {
    display: block;
}

.pbc-faq-answer p {
    margin: 0;
    color: var(--pbc-text-secondary);
    line-height: 1.7;
    font-size: 0.92rem;
}

.pbc-faq-answer a {
    color: var(--pbc-primary);
    text-decoration: none;
    font-weight: 500;
}

.pbc-faq-answer a:hover {
    text-decoration: underline;
}

/* ============================================
   CHECKBOX FIX (custom_styles.css override)
   ============================================ */
.pbc-editor-section input[type="checkbox"],
.pbc-results-section input[type="checkbox"] {
    width: 16px !important;
    height: 16px !important;
    border: 1px solid var(--pbc-border) !important;
    background: var(--pbc-bg-elevated) !important;
    margin-right: 0 !important;
    appearance: auto !important;
    -webkit-appearance: checkbox !important;
}

.pbc-editor-section input[type="checkbox"]:checked,
.pbc-results-section input[type="checkbox"]:checked {
    background: var(--pbc-primary) !important;
    border-color: var(--pbc-primary) !important;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .tool-container { padding: 1rem 0.75rem; }
    .tool-title { font-size: 1.5rem; gap: 0.5rem; }
    .tool-title i { width: 24px !important; height: 24px !important; }
    .tool-description { font-size: 0.95rem; }

    .pbc-upload-section { padding: 1.5rem 1rem; }
    .pbc-upload-area { padding: 2rem 1rem; }
    .pbc-upload-title { font-size: 1.15rem; }

    .pbc-files-header { padding: 0.875rem 1rem; }
    .pbc-file-list { padding: 0.875rem 1rem; }
    .pbc-settings-panel { padding: 1.25rem 1rem 1.75rem; }
    .pbc-action-bar { padding: 1rem; flex-direction: column; }
    .pbc-btn { width: 100%; }

    .pbc-options-grid { grid-template-columns: 1fr; }
    .pbc-preset-grid { grid-template-columns: repeat(2, 1fr); }

    .pbc-compare-grid { grid-template-columns: 1fr; }

    .pbc-related-tools-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .pbc-results-section { padding: 1.5rem 1rem; }
    .pbc-results-stats { gap: 0.5rem; padding: 1rem; }
    .pbc-stat { min-width: 70px; }
    .pbc-stat-value { font-size: 0.95rem; }

    .pbc-info-card { padding: 1.25rem; }
    .pbc-info-card h2 { font-size: 1.15rem; }

    .pbc-processing-card { padding: 1.5rem; min-width: 280px; }
    .pbc-stage-connector { width: 16px; }
}

@media (max-width: 480px) {
    .pbc-preset-grid { grid-template-columns: 1fr 1fr; }
    .pbc-depth-grid { grid-template-columns: 1fr; }
    .pbc-features-grid { grid-template-columns: 1fr; }
    .pbc-file-info { font-size: 0.75rem; }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes pbcFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.pbc-editor-section,
.pbc-results-section {
    animation: pbcFadeIn 0.3s ease;
}

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