/* ============================================
   TIFF Analyzer
   Prefix: tan-
   Styled to match TIFF File Viewer model
   Light mode default, dark mode support
   Blue theme (#3399cc) for inspector tools
   ============================================ */

:root {
    --tan-primary: #3399cc;
    --tan-primary-light: #e0f2fe;
    --tan-primary-dark: #2980b9;
    --tan-primary-rgb: 51, 153, 204;

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

    --tan-bg: #f0f9ff;
    --tan-bg-elevated: #ffffff;
    --tan-bg-secondary: #e0f2fe;
    --tan-bg-tertiary: #bae6fd;

    --tan-text: #0c4a6e;
    --tan-text-secondary: #075985;
    --tan-text-muted: #6b7280;

    --tan-border: #bae6fd;
    --tan-border-light: #e0f2fe;

    --tan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --tan-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --tan-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --tan-shadow-primary: 0 4px 14px rgba(51, 153, 204, 0.25);

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

    --tan-transition: 0.25s;
}

[data-theme="dark"] {
    --tan-primary: #60a5fa;
    --tan-primary-light: rgba(96, 165, 250, 0.15);
    --tan-primary-dark: #3b82f6;
    --tan-primary-rgb: 96, 165, 250;

    --tan-success: #34d399;
    --tan-success-light: rgba(52, 211, 153, 0.18);
    --tan-danger: #f87171;
    --tan-danger-light: rgba(248, 113, 113, 0.18);
    --tan-warning: #fbbf24;
    --tan-warning-light: rgba(251, 191, 36, 0.18);

    --tan-bg: #0c1929;
    --tan-bg-elevated: #152238;
    --tan-bg-secondary: #1e3a5f;
    --tan-bg-tertiary: #264a6e;

    --tan-text: #e0f2fe;
    --tan-text-secondary: #bae6fd;
    --tan-text-muted: #a8b8c8;

    --tan-border: #264a6e;
    --tan-border-light: #1e3a5f;

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

/* Prevent clipping of overlays */
.tool-main {
    overflow: visible !important;
}

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

.tool-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.tan-icon-wrapper {
    width: 52px;
    height: 52px;
    border-radius: var(--tan-radius-md);
    background: var(--tan-primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--tan-shadow-primary);
}

.tool-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--tan-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.tool-description {
    font-size: 1.1rem;
    color: var(--tan-text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
    text-align: center;
}

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

/* ============================================
   MAIN CONTAINER
   ============================================ */
.tool-main {
    background: var(--tan-bg-elevated);
    border-radius: var(--tan-radius-xl);
    border: 1px solid var(--tan-border);
    box-shadow: var(--tan-shadow-md);
    margin-bottom: 2rem;
    overflow: visible;
}

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

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

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

.tan-upload-icon {
    color: var(--tan-primary);
    margin-bottom: 1rem;
}

.tan-upload-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--tan-text);
    margin: 0 0 0.5rem;
}

.tan-upload-subtitle {
    color: var(--tan-text-muted);
    margin: 0 0 1rem;
}

.tan-file-types {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1rem;
}

.tan-file-badge {
    background: var(--tan-bg-secondary);
    color: var(--tan-primary);
    padding: 0.3rem 0.75rem;
    border-radius: var(--tan-radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

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

/* ============================================
   SPINNER (icon stage dots, viewer pattern)
   ============================================ */
.tan-processing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    padding: 1rem;
    animation: tanFadeIn 0.2s ease;
}

@keyframes tanFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.tan-processing-card {
    background: var(--tan-bg-elevated);
    border-radius: var(--tan-radius-lg);
    padding: 2rem;
    min-width: 340px;
    max-width: 420px;
    width: 100%;
    box-shadow: var(--tan-shadow-lg);
    border: 1px solid var(--tan-border);
}

.tan-stages {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    gap: 0;
}

.tan-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 0 0 auto;
}

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

.tan-stage.active .tan-stage-dot {
    background: var(--tan-primary);
    color: #ffffff;
    box-shadow: 0 0 0 4px var(--tan-primary-light);
}

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

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

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

.tan-stage-line {
    width: 28px;
    height: 2px;
    background: var(--tan-bg-secondary);
    align-self: flex-start;
    margin-top: 15px;
    transition: background var(--tan-transition);
}

.tan-stage-line.done {
    background: var(--tan-success);
}

.tan-progress-bar-wrap {
    width: 100%;
    height: 8px;
    background: var(--tan-bg-secondary);
    border-radius: var(--tan-radius-full);
    overflow: hidden;
    margin-bottom: 0.75rem;
}

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

.tan-progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.tan-progress-percent {
    color: var(--tan-text);
    font-weight: 700;
}

.tan-progress-status {
    color: var(--tan-text-muted);
}

/* ============================================
   ERROR
   ============================================ */
.tan-error {
    background: var(--tan-danger-light);
    border-radius: var(--tan-radius-md);
    padding: 1rem 1.25rem;
    margin: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    border: 1px solid var(--tan-danger);
}

.tan-error-icon {
    color: var(--tan-danger);
    flex-shrink: 0;
    margin-top: 2px;
}

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

.tan-error-message {
    color: var(--tan-text);
    margin: 0 0 0.375rem;
    font-weight: 600;
}

.tan-error-help {
    color: var(--tan-text-secondary);
    margin: 0;
    font-size: 0.875rem;
}
.tan-error-help a { color: var(--tan-primary); }

/* ============================================
   FILE BAR
   ============================================ */
.tan-file-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1.5rem;
    padding: 1rem 1.5rem;
    background: var(--tan-bg);
    border-bottom: 1px solid var(--tan-border);
}

.tan-file-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--tan-text-secondary);
    font-size: 0.875rem;
}
.tan-file-item i { color: var(--tan-primary); flex-shrink: 0; }
.tan-file-item strong { color: var(--tan-text); font-weight: 600; }

/* ============================================
   RESULTS LAYOUT
   ============================================ */
.tan-results-body {
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 860px) {
    .tan-results-body { grid-template-columns: 1fr; }
}

/* Preview card */
.tan-preview-card {
    background: var(--tan-bg);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-lg);
    padding: 1rem;
    position: sticky;
    top: 1rem;
}

.tan-preview-image {
    width: 100%;
    border-radius: var(--tan-radius-md);
    background: var(--tan-bg-elevated);
    border: 1px solid var(--tan-border-light);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.tan-preview-image img {
    max-width: 100%;
    max-height: 320px;
    display: block;
}

.tan-no-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 2.5rem 1rem;
    color: var(--tan-text-muted);
    text-align: center;
}
.tan-no-preview i { color: var(--tan-primary); }
.tan-no-preview span { font-size: 0.875rem; }

.tan-preview-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Analysis panel */
.tan-panel-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}
.tan-panel-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--tan-text);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.tan-panel-header i { color: var(--tan-primary); }

/* Quality score */
.tan-score-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem;
    border-radius: var(--tan-radius-lg);
    border: 1px solid var(--tan-border);
    background: var(--tan-bg);
    margin-bottom: 1.25rem;
}

.tan-score-ring {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.6rem;
    font-weight: 800;
    color: #ffffff;
    background: var(--tan-primary);
}
.tan-score-card.score-high .tan-score-ring { background: var(--tan-success); }
.tan-score-card.score-medium .tan-score-ring { background: var(--tan-warning); }
.tan-score-card.score-low .tan-score-ring { background: var(--tan-danger); }

.tan-score-details { display: flex; flex-direction: column; }
.tan-score-label { font-size: 1.1rem; font-weight: 700; color: var(--tan-text); }
.tan-score-hint { font-size: 0.825rem; color: var(--tan-text-muted); }

/* Stat cards grid */
.tan-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.tan-stat-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--tan-bg-elevated);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-md);
    min-width: 0;
}

.tan-stat-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--tan-radius-sm);
    background: var(--tan-primary-light);
    color: var(--tan-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tan-stat-info { display: flex; flex-direction: column; min-width: 0; }
.tan-stat-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--tan-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tan-stat-label { font-size: 0.75rem; color: var(--tan-text-muted); }

.tan-stat-card.opt-high .tan-stat-icon { background: var(--tan-danger-light); color: var(--tan-danger); }
.tan-stat-card.opt-medium .tan-stat-icon { background: var(--tan-warning-light); color: var(--tan-warning); }
.tan-stat-card.opt-low .tan-stat-icon { background: var(--tan-success-light); color: var(--tan-success); }

/* ============================================
   ACCORDIONS
   ============================================ */
.tan-accordion {
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-md);
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.tan-accordion-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.1rem;
    background: var(--tan-bg);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--tan-text);
    text-align: left;
    transition: background var(--tan-transition);
}
.tan-accordion-trigger:hover { background: var(--tan-bg-secondary); }
.tan-accordion-trigger > span {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.tan-accordion-trigger > span i { color: var(--tan-primary); }
.tan-accordion-icon {
    color: var(--tan-text-muted);
    transition: transform var(--tan-transition);
}
.tan-accordion.open .tan-accordion-icon { transform: rotate(180deg); }

.tan-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.tan-accordion.open .tan-accordion-content { max-height: 1600px; }

/* Detail rows */
.tan-detail-list { padding: 0.5rem 1.1rem 1rem; }
.tan-detail-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--tan-border-light);
    font-size: 0.875rem;
}
.tan-detail-row:last-child { border-bottom: none; }
.tan-detail-name { color: var(--tan-text-muted); }
.tan-detail-value { color: var(--tan-text); font-weight: 600; text-align: right; word-break: break-word; }

/* IFD / metadata items */
.tan-meta-list { padding: 0.5rem 1.1rem 1rem; }
.tan-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.55rem 0;
    border-bottom: 1px solid var(--tan-border-light);
    font-size: 0.85rem;
}
.tan-meta-row:last-child { border-bottom: none; }
.tan-meta-name { color: var(--tan-text); font-weight: 600; min-width: 0; word-break: break-word; }
.tan-meta-value { color: var(--tan-text-secondary); text-align: right; word-break: break-word; }
.tan-meta-badge {
    flex-shrink: 0;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.55rem;
    border-radius: var(--tan-radius-full);
    background: var(--tan-primary-light);
    color: var(--tan-primary);
}

/* ============================================
   RECOMMENDATIONS
   ============================================ */
.tan-recommendations {
    margin: 0 1.5rem 1.5rem;
    padding: 1.25rem;
    background: var(--tan-bg);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-lg);
}

.tan-rec-list { display: flex; flex-direction: column; gap: 0.625rem; }

.tan-rec-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--tan-bg-elevated);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-md);
    font-size: 0.875rem;
    color: var(--tan-text-secondary);
}
.tan-rec-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--tan-radius-sm);
    background: var(--tan-warning-light);
    color: var(--tan-warning);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tan-rec-item a { color: var(--tan-primary); font-weight: 600; }

.tan-rec-tools-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--tan-text);
    margin: 1.25rem 0 0.75rem;
}
.tan-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.625rem;
}
.tan-tool-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.75rem;
    background: var(--tan-bg-elevated);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-md);
    text-decoration: none;
    transition: all var(--tan-transition);
}
.tan-tool-link:hover {
    border-color: var(--tan-primary);
    transform: translateY(-1px);
    box-shadow: var(--tan-shadow-sm);
}
.tan-tool-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--tan-radius-sm);
    background: var(--tan-primary-light);
    color: var(--tan-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tan-tool-name { display: block; font-weight: 600; color: var(--tan-text); font-size: 0.875rem; }
.tan-tool-desc { display: block; font-size: 0.75rem; color: var(--tan-text-muted); }

/* ============================================
   BUTTONS
   ============================================ */
.tan-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.1rem;
    border-radius: var(--tan-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--tan-transition);
    text-decoration: none;
}
.tan-btn-primary {
    background: var(--tan-primary);
    color: #ffffff;
    border-color: var(--tan-primary);
    box-shadow: var(--tan-shadow-primary);
}
.tan-btn-primary:hover {
    background: var(--tan-primary-dark);
    border-color: var(--tan-primary-dark);
    transform: translateY(-1px);
}
.tan-btn-outline {
    background: var(--tan-bg-elevated);
    color: var(--tan-text);
    border-color: var(--tan-border);
}
.tan-btn-outline:hover {
    background: var(--tan-primary-light);
    color: var(--tan-primary);
    border-color: var(--tan-primary);
}
.tan-btn-secondary {
    background: var(--tan-bg-secondary);
    color: var(--tan-text);
    border-color: var(--tan-border);
}
.tan-btn-secondary:hover { background: var(--tan-bg-tertiary); }

.tan-action-bar {
    display: flex;
    justify-content: center;
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--tan-border);
}

/* ============================================
   RELATED TOOLS
   ============================================ */
.tan-related {
    margin-bottom: 2rem;
}
.tan-related-box {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--tan-bg-elevated);
    border-radius: var(--tan-radius-lg);
    border: 1px solid var(--tan-border);
}
.tan-related-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--tan-text);
    font-size: 0.9rem;
}
.tan-related-label i { color: var(--tan-primary); }
.tan-related-links { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tan-related-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.4rem 0.875rem;
    background: var(--tan-bg-secondary);
    border-radius: var(--tan-radius-full);
    color: var(--tan-text);
    text-decoration: none;
    font-size: 0.825rem;
    font-weight: 500;
    transition: all var(--tan-transition);
}
.tan-related-link:hover {
    background: var(--tan-primary);
    color: #ffffff;
}
.tan-related-link i { flex-shrink: 0; }

/* ============================================
   INFO CARDS
   ============================================ */
.tan-info-sections {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.tan-info-card {
    background: var(--tan-bg-elevated);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-lg);
    padding: 1.75rem;
}
.tan-info-card h2 {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--tan-text);
    margin: 0 0 1.25rem;
}
.tan-info-card h2 i { color: var(--tan-primary); }
.tan-info-card p,
.tan-info-card li {
    color: var(--tan-text-secondary);
    line-height: 1.7;
}
.tan-info-card a { color: var(--tan-primary); text-decoration: none; font-weight: 500; }
.tan-info-card a:hover { text-decoration: underline; }

.tan-steps-list { margin: 0; padding-left: 1.25rem; display: flex; flex-direction: column; gap: 0.6rem; }

.tan-steps-tip,
.tan-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    margin-top: 1.25rem;
    padding: 0.875rem 1rem;
    background: var(--tan-primary-light);
    border-radius: var(--tan-radius-md);
    font-size: 0.875rem;
    color: var(--tan-text-secondary);
}
.tan-steps-tip i,
.tan-tip i { color: var(--tan-primary); flex-shrink: 0; margin-top: 2px; }

/* Explanation tags */
.tan-explain-list { display: flex; flex-direction: column; gap: 1rem; }
.tan-explain { }
.tan-explain-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.7rem;
    border-radius: var(--tan-radius-full);
    margin-bottom: 0.4rem;
    background: var(--tan-primary-light);
    color: var(--tan-primary);
}
.tan-explain p { margin: 0; }

/* Best-practice cards */
.tan-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}
.tan-case {
    display: flex;
    gap: 0.875rem;
    padding: 1rem;
    background: var(--tan-bg);
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-md);
}
.tan-case-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--tan-radius-md);
    background: var(--tan-primary-light);
    color: var(--tan-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tan-case h4 { margin: 0 0 0.35rem; color: var(--tan-text); font-size: 0.95rem; }
.tan-case p { margin: 0; font-size: 0.85rem; }

/* Features grid */
.tan-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}
.tan-feature { display: flex; gap: 0.875rem; }
.tan-feature-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--tan-radius-md);
    background: var(--tan-primary-light);
    color: var(--tan-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.tan-feature h4 { margin: 0 0 0.35rem; color: var(--tan-text); font-size: 0.95rem; }
.tan-feature p { margin: 0; font-size: 0.85rem; }

/* ============================================
   FAQ (uses .open per global convention)
   ============================================ */
.tan-faq-list { display: flex; flex-direction: column; gap: 0.625rem; }
.tan-faq-item {
    border: 1px solid var(--tan-border);
    border-radius: var(--tan-radius-md);
    overflow: hidden;
}
.tan-faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--tan-bg);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--tan-text);
    text-align: left;
    transition: background var(--tan-transition);
}
.tan-faq-question:hover { background: var(--tan-bg-secondary); }
.tan-faq-question i { color: var(--tan-primary); flex-shrink: 0; transition: transform var(--tan-transition); }
.tan-faq-item.open .tan-faq-question i { transform: rotate(180deg); }
.tan-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.tan-faq-item.open .tan-faq-answer { max-height: 400px; }
.tan-faq-answer p {
    margin: 0;
    padding: 1rem 1.25rem;
    color: var(--tan-text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--tan-border);
}
.tan-faq-answer a { color: var(--tan-primary); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .tool-title { font-size: 1.6rem; }
    .tan-upload-section { padding: 1.5rem; }
    .tan-results-body { padding: 1rem; }
    .tan-preview-card { position: static; }
    .tan-info-card { padding: 1.25rem; }
    .tan-features-grid,
    .tan-cases-grid { grid-template-columns: 1fr; }
    .tan-stages { transform: scale(0.92); }
}