/* ==========================================================================
   Profit Margin Calculator — Complete Stylesheet
   ========================================================================== */

:root {
    --primary-color: #0f766e;
    --primary-hover: #0d5a54;
    --primary-light: #f0fdfa;
    --bg-canvas: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #cbd5e1;
    --border-light: #e2e8f0;
    --text-dark: #0f172a;
    --text-muted: #475569;
    --text-light: #64748b;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease;

    --status-good: #10b981;
    --status-warn: #f59e0b;
    --status-danger: #ef4444;

    --link-blue: #2563eb;
    --link-blue-hover: #1e40af;
    --link-blue-tint: #eff6ff;
    --link-blue-soft: #dbeafe;
}

/* ==========================================================================
   1. BASE
   ========================================================================== */

.pm-app-wrapper {
    max-width: 1250px;
    margin: 0 auto;
    padding: 20px;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-dark);
    background: var(--bg-canvas);
}

/* ==========================================================================
   2. BREADCRUMBS
   ========================================================================== */

.breadcrumb-nav {
    max-width: 1250px;
    width: 100%;
    margin: 0 auto;
    padding: 18px 20px 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.breadcrumb-list {
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 0; list-style: none; padding: 0; margin: 0;
    font-size: 0.875rem; line-height: 1.4; color: var(--text-light);
}

.breadcrumb-list li {
    display: inline-flex; align-items: center;
    margin: 0; padding: 0;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '/'; display: inline-block;
    margin: 0 8px; color: #cbd5e1;
    font-weight: 400; user-select: none;
}

.breadcrumb-list a {
    color: var(--primary-color); text-decoration: none;
    font-weight: 500; transition: color 0.15s ease;
}
.breadcrumb-list a:hover {
    color: var(--primary-hover); text-decoration: underline;
}
.breadcrumb-list [aria-current="page"] {
    color: var(--text-dark); font-weight: 600;
}

/* ==========================================================================
   3. HEADER
   ========================================================================== */

.pm-header {
    margin-bottom: 24px;
    text-align: center;
}

.pm-eyebrow {
    display: inline-block;
    font-size: 0.7rem; font-weight: 600;
    letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--primary-color); background: var(--primary-light);
    padding: 0.2rem 0.8rem; border-radius: 20px;
    margin-bottom: 8px;
}

.pm-header h1 {
    font-size: 2rem; font-weight: 800;
    margin-bottom: 6px; color: var(--text-dark);
}

.pm-header p {
    color: var(--text-muted);
    font-size: 1rem; max-width: 720px;
    margin: 0 auto; line-height: 1.6;
}

/* ==========================================================================
   4. TOOLBAR
   ========================================================================== */

.pm-toolbar {
    display: flex; justify-content: space-between;
    align-items: center; background: var(--card-bg);
    padding: 14px 20px; border-radius: var(--radius);
    border: 1px solid var(--border-color);
    margin-bottom: 24px; box-shadow: var(--shadow);
    flex-wrap: wrap; gap: 12px;
}

.toolbar-group {
    display: flex; align-items: center; gap: 12px;
}

.color-label {
    font-weight: 600; color: var(--text-dark); font-size: 0.9rem;
}

.color-picker-wrapper {
    position: relative; width: 36px; height: 36px;
    border-radius: 50%; border: 2px solid var(--border-color);
    overflow: hidden; cursor: pointer;
    background: #0f766e; flex-shrink: 0;
}

.color-picker-input {
    position: absolute; top: -10px; left: -10px;
    width: 60px; height: 60px; border: none;
    cursor: pointer; opacity: 0;
}

.toolbar-actions {
    display: flex; gap: 8px; flex-wrap: wrap;
}

/* ==========================================================================
   5. BUTTONS
   ========================================================================== */

.btn {
    padding: 9px 16px; font-size: 0.85rem; font-weight: 600;
    border-radius: 6px; border: 1px solid transparent;
    cursor: pointer; transition: var(--transition);
    display: inline-flex; align-items: center; justify-content: center;
    text-decoration: none; white-space: nowrap;
    font-family: inherit;
}
.btn:focus-visible { outline: 2px solid var(--primary-color); outline-offset: 2px; }

.btn-primary { background: var(--primary-color); color: #fff !important; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary {
    background: #1e293b; color: #fff !important; border-color: #0f172a;
}
.btn-secondary:hover { background: #334155; }

.btn-outline {
    background: #fff; border-color: var(--border-color); color: var(--text-dark) !important;
}
.btn-outline:hover { background: var(--bg-canvas); }

.btn-danger-soft {
    background: #fef2f2; color: #dc2626 !important; border-color: #fecaca;
}
.btn-danger-soft:hover { background: #fee2e2; }

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ==========================================================================
   6. WORKSPACE
   ========================================================================== */

.pm-workspace {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 30px; align-items: start;
}

.editor-column {
    display: flex; flex-direction: column; gap: 20px;
}

/* ==========================================================================
   7. EDITOR CARDS
   ========================================================================== */

.editor-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow); overflow: hidden;
}

.card-header {
    background: #f1f5f9;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 1rem; margin: 0;
    color: var(--text-dark); font-weight: 700;
}

.card-body { padding: 20px; }

/* ==========================================================================
   8. FORM
   ========================================================================== */

.form-group {
    display: flex; flex-direction: column;
    gap: 6px; margin-bottom: 14px;
}
.form-group:last-child { margin-bottom: 0; }
.form-group.full-width { grid-column: 1 / -1; }

.form-group label {
    font-size: 0.8rem; font-weight: 600; color: var(--text-dark);
}

.field-hint {
    display: block; font-size: 0.72rem;
    color: var(--text-light); font-style: italic;
    line-height: 1.4; margin-top: -1px;
}

.form-control {
    width: 100%; padding: 9px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px; font-size: 0.9rem;
    box-sizing: border-box; outline: none;
    color: var(--text-dark); background-color: #ffffff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    font-family: inherit;
}
.form-control:hover { border-color: #94a3b8; }
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

select.form-control { appearance: auto; cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 60px; line-height: 1.5; }
.full-width { width: 100%; }

/* ==========================================================================
   9. PREVIEW PAPER
   ========================================================================== */

.pm-preview-container { position: sticky; top: 20px; }

.pm-paper {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 30px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    position: relative;
    box-sizing: border-box;
    max-width: 100%;
    overflow: hidden;
}

.pm-paper * {
    max-width: 100%; box-sizing: border-box;
}

.paper-accent-bar {
    position: absolute; top: 0; left: 0; right: 0;
    height: 6px; background: var(--primary-color);
    border-radius: var(--radius) var(--radius) 0 0;
    transition: background-color 0.3s ease;
}

/* ==========================================================================
   10. PAPER HEADER
   ========================================================================== */

.paper-header {
    display: flex; justify-content: space-between;
    align-items: flex-start; margin-bottom: 20px;
    border-bottom: 1px solid var(--border-light);
    padding-bottom: 14px;
}

.paper-brand {
    display: flex; flex-direction: row; align-items: center;
    gap: 16px; flex: 1;
}

.brand-details { display: flex; flex-direction: column; }

.doc-title {
    font-size: 1.3rem; font-weight: 800;
    color: var(--primary-color); margin: 0;
    letter-spacing: 0.05em;
}

.doc-subtitle {
    font-size: 0.85rem; color: var(--text-muted); margin: 2px 0 0 0;
}

.paper-meta {
    text-align: right; flex-shrink: 0; min-width: 140px;
}

.meta-line {
    font-size: 0.85rem; color: var(--text-muted); line-height: 1.6;
}
.meta-line strong { color: var(--text-dark); }

/* ==========================================================================
   11. PAPER SUMMARY (4 items)
   ========================================================================== */

.paper-summary {
    display: grid; grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 12px; margin-bottom: 20px;
}

.summary-item {
    padding: 10px 14px;
    background: var(--bg-canvas);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    text-align: center;
}

.summary-item.grand {
    background: var(--primary-light);
    border-color: var(--primary-color);
    border-width: 2px;
}
.summary-item.grand .summary-value {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.1rem;
}

.summary-label {
    display: block; font-size: 0.6rem; font-weight: 600;
    color: var(--text-light); text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-value {
    display: block; font-size: 0.85rem; font-weight: 600;
    color: var(--text-dark); margin-top: 2px;
    font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   12. PAPER RESULTS (4 items)
   ========================================================================== */

.paper-results {
    display: grid; grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 10px; margin-bottom: 20px;
}

.result-card {
    padding: 12px 14px;
    background: var(--bg-canvas);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    text-align: center;
}

.result-card.highlight {
    background: var(--primary-light);
    border-color: var(--primary-color);
}
.result-card.highlight .result-value {
    color: var(--primary-color);
    font-weight: 700;
}

.result-card.grand {
    background: var(--text-dark);
    border-color: var(--text-dark);
}
.result-card.grand .result-label { color: #94a3b8; }
.result-card.grand .result-value { color: #ffffff; font-weight: 700; }

.result-label {
    display: block; font-size: 0.6rem; font-weight: 600;
    color: var(--text-light); text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-value {
    display: block; font-size: 0.85rem; font-weight: 600;
    color: var(--text-dark); margin-top: 2px;
    font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   13. PAPER BREAKDOWN (10 items — 2-3 per row)
   ========================================================================== */

.pm-breakdown { margin-bottom: 20px; }

.pm-breakdown h4 {
    font-size: 0.85rem; font-weight: 700;
    color: var(--text-dark); margin: 0 0 10px 0;
}

.breakdown-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

.breakdown-item {
    padding: 10px 12px;
    background: var(--bg-canvas);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    text-align: center;
}

.breakdown-label {
    display: block; font-size: 0.6rem; font-weight: 600;
    color: var(--text-light); text-transform: uppercase;
    letter-spacing: 0.05em;
}

.breakdown-value {
    display: block; font-size: 0.85rem; font-weight: 600;
    color: var(--text-dark); margin-top: 2px;
    font-variant-numeric: tabular-nums;
}

.breakdown-value.grand-value {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.95rem;
}

/* ==========================================================================
   14. STATUS GRID
   ========================================================================== */

.pm-status { margin-bottom: 20px; }

.pm-status h4 {
    font-size: 0.85rem; font-weight: 700;
    color: var(--text-dark); margin: 0 0 10px 0;
}

.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

.status-item {
    display: flex; flex-direction: column; gap: 6px;
    padding: 12px 14px;
    background: var(--bg-canvas);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--border-light);
    border-radius: var(--radius);
    text-align: left;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.status-label {
    font-size: 0.65rem; font-weight: 600;
    color: var(--text-light); text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-value {
    font-size: 0.9rem; font-weight: 700;
    color: var(--text-dark);
}

.status-value.status-good     { color: var(--status-good); }
.status-value.status-average  { color: var(--status-warn); }
.status-value.status-poor     { color: var(--status-danger); }
.status-value.status-neutral  { color: var(--text-muted); }

/* ==========================================================================
   15. FORMULA
   ========================================================================== */

.pm-formula { margin-bottom: 20px; }

.pm-formula .formula-box {
    padding: 14px 16px;
    background: var(--bg-canvas);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
}

.pm-formula .formula-box h4 {
    font-size: 0.85rem; font-weight: 700;
    color: var(--text-dark); margin: 0 0 6px 0;
}

.pm-formula .formula-box p {
    margin: 4px 0; font-size: 0.9rem;
    color: var(--text-muted); line-height: 1.55;
}

.pm-formula .formula-box p:first-of-type {
    font-family: 'SF Mono', Monaco, 'Cascadia Mono', monospace;
    font-size: 0.85rem; color: var(--text-dark);
}

.pm-formula .formula-box p:last-of-type {
    font-family: inherit; font-style: italic;
    color: var(--text-light); font-size: 0.85rem;
}

/* ==========================================================================
   16. NOTES
   ========================================================================== */

.paper-notes {
    padding: 12px 16px;
    background: var(--bg-canvas);
    border-radius: 6px;
    border: 1px solid var(--border-light);
    margin-bottom: 20px;
}

.paper-notes strong {
    display: block; font-size: 0.75rem;
    text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--text-light); margin-bottom: 4px;
}

.paper-notes p {
    margin: 0; font-size: 0.9rem;
    color: var(--text-muted); line-height: 1.6;
}

/* ==========================================================================
   17. SIGNATURE
   ========================================================================== */

.paper-signature-block {
    margin-top: 20px; padding-top: 14px;
    border-top: 1px dashed var(--border-color);
}

.sig-notice {
    text-align: center; font-size: 0.75rem;
    color: var(--text-light); margin-bottom: 16px;
    line-height: 1.5;
}

.sig-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}

.sig-item {
    text-align: center; font-size: 0.8rem;
    color: var(--text-light);
    display: flex; flex-direction: column; gap: 6px;
}

.sig-line {
    height: 1px; background: var(--border-color);
    margin-bottom: 6px; width: 80%;
    margin-left: auto; margin-right: auto;
}

/* ==========================================================================
   18. SEO CONTAINER
   ========================================================================== */

.pm-seo-container {
    margin-top: 60px;
    display: flex; flex-direction: column; gap: 30px;
}

.seo-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px; box-shadow: var(--shadow);
}

.seo-eyebrow {
    display: inline-block; font-size: 0.65rem;
    font-weight: 600; letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-color); background: var(--primary-light);
    padding: 0.25rem 0.9rem; border-radius: 20px;
    margin-bottom: 12px;
}

.seo-card h2 {
    font-size: 1.5rem; font-weight: 700;
    margin-top: 0; margin-bottom: 12px;
    color: var(--text-dark); line-height: 1.3;
}

.seo-card h3 {
    font-size: 1.1rem; font-weight: 600;
    margin-top: 20px; margin-bottom: 10px;
    color: var(--text-dark);
}

.seo-card h4 {
    font-size: 0.95rem; font-weight: 700;
    margin: 0 0 6px 0; color: var(--text-dark);
}

.seo-card p {
    color: var(--text-muted);
    line-height: 1.7; margin: 0 0 16px 0;
}
.seo-card p:last-child { margin-bottom: 0; }

.seo-card ul {
    color: var(--text-muted); line-height: 1.7;
    padding-left: 20px; margin: 0 0 16px 0;
}
.seo-card ul li { margin-bottom: 8px; }
.seo-card ul li:last-child { margin-bottom: 0; }
.seo-card ul li strong { color: var(--text-dark); }

.seo-card a {
    color: var(--primary-color); text-decoration: none; font-weight: 500;
    border-bottom: 1px solid rgba(15, 118, 110, 0.25);
    transition: border-color 0.15s ease, color 0.15s ease;
}
.seo-card a:hover {
    color: var(--primary-hover); border-bottom-color: var(--primary-hover);
}

.seo-card strong { color: var(--text-dark); font-weight: 700; }

/* ==========================================================================
   19. AUTHOR BOX
   ========================================================================== */

.author-box {
    border-left: 4px solid var(--primary-color);
    background: var(--bg-canvas);
    border-radius: var(--radius);
    padding: 16px 20px; margin: 16px 0;
    font-size: 0.92rem; line-height: 1.6;
    color: var(--text-muted);
}

.author-box p {
    margin: 0 0 8px;
    font-size: 0.92rem;
    color: var(--text-muted);
}
.author-box p:last-child { margin-bottom: 0; }

.author-box strong { color: var(--text-dark); font-weight: 700; }

.author-box a {
    color: var(--primary-color); font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid rgba(15, 118, 110, 0.3);
}
.author-box a:hover {
    border-bottom-color: var(--primary-hover); color: var(--primary-hover);
}

/* ==========================================================================
   20. STEPS GRID
   ========================================================================== */

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px; margin-top: 16px;
}

.step-box {
    background: var(--bg-canvas);
    padding: 18px; border-radius: var(--radius);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}
.step-box:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.step-num {
    width: 32px; height: 32px;
    background: var(--primary-color); color: #ffffff !important;
    font-weight: 700; font-size: 0.9rem;
    border-radius: 50%; display: flex;
    align-items: center; justify-content: center;
    margin-bottom: 10px;
}

.step-box h3 {
    font-size: 0.95rem; font-weight: 600;
    margin: 0 0 4px 0; color: var(--text-dark);
}
.step-box p {
    font-size: 0.85rem; color: var(--text-muted);
    margin: 0; line-height: 1.5;
}

/* ==========================================================================
   21. BENEFITS LIST
   ========================================================================== */

.benefits-list {
    list-style: none; padding: 0 !important;
}

.benefits-list li {
    padding: 8px 0 8px 28px;
    position: relative; color: var(--text-muted);
    font-size: 0.95rem; line-height: 1.6;
    border-bottom: 1px solid var(--border-light);
}
.benefits-list li:last-child { border-bottom: none; }

.benefits-list li::before {
    content: "✓"; position: absolute;
    left: 0; color: var(--primary-color); font-weight: 700;
}

.benefits-list li strong { color: var(--text-dark); }

/* ==========================================================================
   22. TIPS GRID
   ========================================================================== */

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px; margin-top: 12px;
}

.tip-item {
    background: var(--bg-canvas);
    padding: 16px; border-radius: var(--radius);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}
.tip-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.tip-icon {
    font-size: 1.5rem; display: block; margin-bottom: 8px;
}

.tip-item h4 {
    font-size: 0.95rem; font-weight: 600;
    margin: 0 0 4px 0; color: var(--text-dark);
}
.tip-item p {
    font-size: 0.85rem; color: var(--text-muted);
    margin: 0; line-height: 1.5;
}

/* ==========================================================================
   23. RELATED CALCULATORS — 3 per row (9 cards)
   ========================================================================== */

.tools-link-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px; margin-top: 18px;
}

.tool-link-card {
    display: block; text-decoration: none;
    padding: 20px 22px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--card-bg);
    transition: var(--transition);
}
.tool-link-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}
.tool-link-card.active {
    border-color: var(--primary-color);
    background: var(--primary-light);
    border-width: 2px;
}

.tool-link-card h4 {
    margin: 0 0 6px 0;
    color: var(--link-blue);
    font-size: 1.1rem; font-weight: 700;
    transition: color 0.15s ease;
}
.tool-link-card:hover h4 {
    color: var(--link-blue-hover);
    text-decoration: underline;
}

.tool-link-card p {
    margin: 0; font-size: 0.9rem;
    color: var(--text-muted); line-height: 1.5;
    font-weight: 500;
}

/* ==========================================================================
   24. LEARNING TOPICS — 3 per row
   ========================================================================== */

.learning-topics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px; margin-top: 18px;
}

.learning-topic-card {
    display: block; text-decoration: none;
    padding: 20px 22px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--card-bg);
    transition: var(--transition);
}
.learning-topic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--link-blue);
}

.learning-topic-card .topic-icon {
    font-size: 1.8rem; display: block; margin-bottom: 8px;
}

.learning-topic-card h4 {
    margin: 0 0 6px 0;
    color: var(--link-blue);
    font-size: 1.05rem; font-weight: 700;
    transition: color 0.15s ease;
}
.learning-topic-card:hover h4 {
    color: var(--link-blue-hover);
    text-decoration: underline;
}

.learning-topic-card p {
    margin: 0; font-size: 0.9rem;
    color: var(--text-muted); line-height: 1.5;
    font-weight: 500;
}

/* ==========================================================================
   25. FAQ
   ========================================================================== */

.faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 16px 0;
}
.faq-item:first-child { padding-top: 0; }
.faq-item:last-child { border-bottom: none; }

.faq-item h3 {
    font-size: 1rem; font-weight: 600;
    margin: 0 0 6px 0; color: var(--text-dark);
    cursor: pointer;
}
.faq-item h3:hover { color: var(--primary-color); }

.faq-item p {
    font-size: 0.95rem; color: var(--text-muted);
    margin: 0; line-height: 1.6;
}

/* ==========================================================================
   26. LEGAL
   ========================================================================== */

.legal-content { margin-top: 8px; }
.legal-content ul { margin-top: 8px; }

.legal-note {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    border-radius: var(--radius);
    padding: 16px 20px; margin-top: 16px;
    color: #92400e; font-size: 0.9rem; line-height: 1.6;
}
.legal-note strong { color: #78350f; }

/* ==========================================================================
   27. RESPONSIVE — TABLET (≤992px)
   ========================================================================== */

@media (max-width: 992px) {
    .pm-workspace { grid-template-columns: 1fr; }
    .pm-preview-container { position: static; }
    .paper-summary { grid-template-columns: 1fr 1fr; }
    .paper-results { grid-template-columns: 1fr 1fr; }
    .breakdown-grid { grid-template-columns: 1fr 1fr; }
    .status-grid { grid-template-columns: 1fr 1fr; }
    .tools-link-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .learning-topics-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

/* ==========================================================================
   28. RESPONSIVE — (≤768px)
   ========================================================================== */

@media (max-width: 768px) {
    .breadcrumb-nav { padding: 14px 16px 0; }
    .breadcrumb-list { font-size: 0.8rem; }
    .breadcrumb-list li:not(:last-child)::after { margin: 0 6px; }

    .pm-toolbar { flex-direction: column; align-items: stretch; }
    .toolbar-actions { justify-content: center; flex-wrap: wrap; }

    .paper-header { flex-direction: column; align-items: stretch; }
    .paper-meta { text-align: left; margin-top: 12px; min-width: auto; }

    .paper-summary { grid-template-columns: 1fr 1fr; }
    .paper-results { grid-template-columns: 1fr 1fr; }
    .breakdown-grid { grid-template-columns: 1fr 1fr; }
    .status-grid { grid-template-columns: 1fr; }

    .seo-card { padding: 20px; }
    .seo-card h2 { font-size: 1.25rem; }
    .steps-grid { grid-template-columns: 1fr 1fr; }
    .tips-grid { grid-template-columns: 1fr; }

    .tools-link-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .learning-topics-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .tool-link-card { padding: 16px 18px; }
    .tool-link-card h4 { font-size: 1rem; }
    .tool-link-card p { font-size: 0.85rem; }
}

/* ==========================================================================
   29. RESPONSIVE — MOBILE (≤600px)
   ========================================================================== */

@media (max-width: 600px) {
    .pm-app-wrapper { padding: 12px; }
    .paper-summary { grid-template-columns: 1fr; }
    .paper-results { grid-template-columns: 1fr 1fr; }
    .breakdown-grid { grid-template-columns: 1fr; }
    .status-grid { grid-template-columns: 1fr; }
    .steps-grid { grid-template-columns: 1fr; }

    .tools-link-grid { grid-template-columns: 1fr; gap: 12px; }
    .learning-topics-grid { grid-template-columns: 1fr; gap: 12px; }
    .tool-link-card { padding: 14px 16px; }

    .pm-header h1 { font-size: 1.5rem; }
    .pm-paper { padding: 16px; }

    .result-value { font-size: 0.8rem; }
    .result-card.highlight .result-value { font-size: 0.9rem; }

    .btn { padding: 6px 12px; font-size: 0.8rem; }
    .toolbar-actions { gap: 4px; }

    .sig-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ==========================================================================
   30. PRINT
   ========================================================================== */

@media print {
    body * { visibility: hidden !important; }
    #pmPaper, #pmPaper * { visibility: visible !important; }
    #pmPaper {
        position: absolute; left: 0; top: 0; width: 100%;
        border: none !important; box-shadow: none !important;
        border-radius: 0 !important; padding: 20px !important;
    }

    .paper-accent-bar,
    .summary-item.grand,
    .result-card.highlight,
    .result-card.grand,
    .doc-title {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}

/* ==========================================================================
   31. REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    .pm-app-wrapper *,
    .pm-app-wrapper *::before,
    .pm-app-wrapper *::after {
        transition: none !important;
        animation: none !important;
    }
    .tool-link-card:hover,
    .learning-topic-card:hover,
    .step-box:hover,
    .tip-item:hover {
        transform: none !important;
    }
}