/* ============================================================
   HearSafe Multi-Page · Shared Stylesheet (v3.3)
   设计变更文档 v1.0 实现
   包含：.grid-2col 定义 · 无重复补丁块
   ============================================================ */

/* ----------------------------------------------------------
   DESIGN SYSTEM
   ---------------------------------------------------------- */
:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border: #e5e7eb;
    --border-light: #f0f2f4;

    --primary: #0f3460;
    --primary-light: #1a4a7a;
    --primary-surface: #eef2f7;

    --accent: #e67e22;
    --accent-hover: #d35400;
    --accent-surface: #fef4e8;

    --success: #10b981;
    --success-surface: #ecfdf5;
    --warning: #f59e0b;
    --warning-surface: #fffbeb;
    --danger: #ef4444;
    --danger-surface: #fef2f2;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ----------------------------------------------------------
   HEADER
   ---------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.brand-mark {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
}

.brand span {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
}

.nav-desktop {
    display: flex;
    gap: 2px;
    align-items: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.nav-desktop::-webkit-scrollbar {
    display: none;
}

.nav-desktop a {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.nav-desktop a:hover {
    background: var(--bg);
    color: var(--text-primary);
}
.nav-desktop a.active {
    background: var(--primary);
    color: #fff;
}
.nav-desktop a .badge-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-left: 4px;
    background: var(--text-muted);
    vertical-align: middle;
}
.nav-desktop a .badge-dot.done {
    background: var(--success);
}
.nav-desktop a .badge-dot.active-dot {
    background: var(--accent);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}
.nav-toggle:hover {
    background: var(--bg);
}

/* ----------------------------------------------------------
   MOBILE NAV OVERLAY
   ---------------------------------------------------------- */
.mobile-nav {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 200;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.mobile-nav.active {
    display: block;
}
.mobile-nav-panel {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 290px;
    background: var(--surface);
    padding: 24px 20px;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
    animation: slideIn 0.28s ease;
    overflow-y: auto;
}
@keyframes slideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}
.mobile-nav-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    float: right;
    color: var(--text-primary);
}
.mobile-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}
.mobile-nav a:last-child {
    border-bottom: none;
}
.mobile-nav a .badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    flex-shrink: 0;
}
.mobile-nav a .badge-dot.done {
    background: var(--success);
}
.mobile-nav a .badge-dot.active-dot {
    background: var(--accent);
}

/* ----------------------------------------------------------
   MAIN
   ---------------------------------------------------------- */
.main-wrap {
    flex: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 32px 24px 60px;
    width: 100%;
}

.page {
    animation: fadeUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ----------------------------------------------------------
   HOME · DASHBOARD
   ---------------------------------------------------------- */
.dashboard-hero {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    color: #fff;
    margin-bottom: 32px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.dashboard-hero h1 {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}
.dashboard-hero p {
    opacity: 0.8;
    font-size: 0.95rem;
    margin-top: 4px;
}
.dashboard-hero .progress-wrap {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.12);
    padding: 10px 20px;
    border-radius: var(--radius-xl);
    backdrop-filter: blur(4px);
}
.dashboard-hero .progress-ring {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.05rem;
    position: relative;
}
.dashboard-hero .progress-ring svg {
    position: absolute;
    top: -2px;
    left: -2px;
    width: 52px;
    height: 52px;
    transform: rotate(-90deg);
}
.dashboard-hero .progress-ring svg circle {
    fill: none;
    stroke: rgba(255, 255, 255, 0.25);
    stroke-width: 3;
}
.dashboard-hero .progress-ring svg .progress-fill {
    stroke: var(--accent);
    stroke-dasharray: 150.8;
    stroke-dashoffset: 150.8;
    transition: stroke-dashoffset 0.6s ease;
}
.dashboard-hero .progress-label {
    font-size: 0.85rem;
    font-weight: 500;
    opacity: 0.9;
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 8px;
}

.mod-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px 20px 18px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6px;
    text-decoration: none;
    color: inherit;
}
.mod-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}
.mod-card .mod-icon {
    font-size: 1.6rem;
    line-height: 1;
}
.mod-card .mod-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}
.mod-card .mod-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    flex: 1;
}
.mod-card .mod-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 12px 3px 10px;
    border-radius: 20px;
    margin-top: 4px;
    align-self: flex-start;
    background: var(--bg);
    color: var(--text-secondary);
}
.mod-card .mod-status.done {
    background: var(--success-surface);
    color: var(--success);
}
.mod-card .mod-status.active {
    background: var(--accent-surface);
    color: var(--accent);
}
.mod-card .mod-status .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    display: inline-block;
}

/* ----------------------------------------------------------
   MODULE · CARD FLOW
   ---------------------------------------------------------- */
.module-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.module-header .back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}
.module-header .back-btn:hover {
    background: var(--bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}
.module-header .mod-title-lg {
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 10px;
}
.module-header .mod-title-lg .badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 12px;
    border-radius: 20px;
    background: var(--accent);
    color: #fff;
    letter-spacing: 0.02em;
}
.module-header .step-indicator {
    margin-left: auto;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.card-flow {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.card-track {
    display: flex;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.flow-card {
    flex: 0 0 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 36px;
    min-height: 320px;
    transition: var(--transition);
}
.flow-card:hover {
    box-shadow: var(--shadow-sm);
}

.flow-card .card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}
.flow-card .card-title .card-num {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--bg);
    padding: 2px 10px;
    border-radius: 20px;
}
.flow-card p,
.flow-card li {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.8;
}
.flow-card ul {
    padding-left: 1.4rem;
}
.flow-card li {
    margin-bottom: 6px;
}
.flow-card strong {
    color: var(--text-primary);
}

.card-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 24px;
    gap: 12px;
    flex-wrap: wrap;
}
.card-nav .dots {
    display: flex;
    gap: 8px;
    align-items: center;
}
.card-nav .dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    transition: var(--transition);
    cursor: pointer;
}
.card-nav .dots span.active-dot {
    background: var(--primary);
    width: 24px;
    border-radius: 4px;
}
.card-nav .dots span.done-dot {
    background: var(--success);
}
.card-nav .nav-btn {
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.card-nav .nav-btn:hover:not(:disabled) {
    background: var(--bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}
.card-nav .nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.card-nav .nav-btn.primary-btn {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.card-nav .nav-btn.primary-btn:hover:not(:disabled) {
    background: var(--primary-light);
    border-color: var(--primary-light);
}

/* ----------------------------------------------------------
   QUIZ CARD
   ---------------------------------------------------------- */
.quiz-question {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}
.quiz-question:last-child {
    border-bottom: none;
    margin-bottom: 0;
}
.quiz-question .q-text {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.quiz-question .q-options {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.quiz-question .q-options label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.quiz-question .q-options label:hover {
    background: var(--bg);
}
.quiz-question .q-options input[type="radio"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}
.quiz-question .q-options label.correct {
    background: var(--success-surface);
    border-color: var(--success);
    color: var(--success);
}
.quiz-question .q-options label.wrong {
    background: var(--danger-surface);
    border-color: var(--danger);
    color: var(--danger);
}
.quiz-question .q-options label.disabled {
    cursor: default;
    opacity: 0.7;
}
.quiz-question .q-options label.disabled:hover {
    background: transparent;
}
.quiz-result {
    margin-top: 16px;
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    display: none;
}
.quiz-result.show {
    display: block;
}
.quiz-result.pass {
    background: var(--success-surface);
    color: var(--success);
    border: 1px solid var(--success);
}
.quiz-result.fail {
    background: var(--danger-surface);
    color: var(--danger);
    border: 1px solid var(--danger);
}

/* ----------------------------------------------------------
   HIGHLIGHT / INFO BOXES
   ---------------------------------------------------------- */
.highlight-box {
    background: var(--primary-surface);
    border-left: 4px solid var(--primary);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin: 12px 0;
    font-size: 0.92rem;
    color: var(--text-secondary);
}
.highlight-box strong {
    color: var(--text-primary);
}
.highlight-box.warn {
    background: var(--warning-surface);
    border-color: var(--warning);
}
.highlight-box.success {
    background: var(--success-surface);
    border-color: var(--success);
}
.highlight-box.danger {
    background: var(--danger-surface);
    border-color: var(--danger);
}

/* ----------------------------------------------------------
   dB BARS (visual)
   ---------------------------------------------------------- */
.db-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 6px 0;
}
.db-bar .label {
    min-width: 130px;
    font-weight: 500;
    font-size: 0.88rem;
    color: var(--text-primary);
}
.db-bar .track {
    flex: 1;
    height: 10px;
    background: var(--bg);
    border-radius: 5px;
    overflow: hidden;
}
.db-bar .bar {
    height: 100%;
    border-radius: 5px;
    transition: width 0.8s ease;
}
.db-bar .value {
    min-width: 70px;
    font-weight: 600;
    font-size: 0.88rem;
    text-align: right;
    color: var(--text-primary);
}

/* ----------------------------------------------------------
   HAIR CELLS
   ---------------------------------------------------------- */
.hair-cell-wrap {
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 20px 16px;
    text-align: center;
}
.hair-cell {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    justify-content: center;
    margin-bottom: 8px;
}
.hair-cell .cell {
    width: 14px;
    height: 26px;
    background: #3b82f6;
    border-radius: 6px 6px 0 0;
    transform-origin: bottom;
    transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.hair-cell .cell.damaged {
    background: #ef4444;
    transform: scaleY(0.25);
}

/* ----------------------------------------------------------
   TABLE
   ---------------------------------------------------------- */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    margin: 8px 0;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    min-width: 600px;
}
th {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    padding: 10px 14px;
    text-align: left;
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}
td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    vertical-align: top;
}
tr:last-child td {
    border-bottom: none;
}
tr:hover td {
    background: var(--bg);
}
.tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.68rem;
    font-weight: 600;
    margin-right: 2px;
    white-space: nowrap;
}
.tag-gb   { background: #dbeafe; color: #1e40af; }
.tag-osha { background: #fce4ec; color: #b91c1c; }
.tag-niosh{ background: #e0f2fe; color: #0369a1; }
.tag-eu   { background: #f3e8ff; color: #6b21a8; }

/* ----------------------------------------------------------
   HIERARCHY
   ---------------------------------------------------------- */
.hierarchy {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 16px 0;
}
.hierarchy-item {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.92rem;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    transition: var(--transition);
}
.hierarchy-item:hover {
    transform: translateX(4px);
}
.hierarchy-item .num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}
.hi-1 { background: linear-gradient(135deg, #0b2c4a, #1a3a5a); }
.hi-2 { background: linear-gradient(135deg, #1a5a7a, #2a7a9a); margin-left: 3%; }
.hi-3 { background: linear-gradient(135deg, #2d7a9a, #3d9aaa); margin-left: 6%; }
.hi-4 { background: linear-gradient(135deg, #e67e22, #f39c12); margin-left: 9%; }
.hi-5 { background: linear-gradient(135deg, #f39c12, #f1c40f); margin-left: 12%; color: var(--text-primary); }

/* ----------------------------------------------------------
   CALCULATOR (real-time)
   ---------------------------------------------------------- */
.calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin: 16px 0;
}
.calc-field label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.calc-field input,
.calc-field select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--bg);
    transition: var(--transition);
}
.calc-field input:focus,
.calc-field select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 52, 96, 0.10);
}

.calc-result-box {
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 18px 24px;
    margin-top: 16px;
    font-size: 0.92rem;
    line-height: 2;
    border: 1px solid var(--border);
}
.calc-result-box .val {
    font-weight: 700;
    color: var(--primary);
    font-size: 1rem;
}
.calc-result-box .status-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 2px 14px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
}
.calc-result-box .status-ok {
    background: var(--success-surface);
    color: var(--success);
}
.calc-result-box .status-warn {
    background: var(--warning-surface);
    color: var(--warning);
}
.calc-result-box .status-danger {
    background: var(--danger-surface);
    color: var(--danger);
}

/* 双栏对比布局（计算器结果区） */
.calc-result-box .grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 20px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

/* ----------------------------------------------------------
   DISCLAIMER
   ---------------------------------------------------------- */
.disclaimer-card {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    margin-bottom: 16px;
}
.disclaimer-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #78350f;
}
.disclaimer-card p {
    color: #92400e;
    font-size: 0.9rem;
    line-height: 1.8;
}
.disclaimer-card strong {
    color: #78350f;
}

/* ----------------------------------------------------------
   FOOTER
   ---------------------------------------------------------- */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 28px 24px;
    flex-shrink: 0;
    margin-top: auto;
}
.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
}
.footer-brand span {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
}
.footer-nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}
.footer-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
}
.footer-nav a:hover {
    color: var(--text-primary);
}
.footer-copy {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ----------------------------------------------------------
   PRINT
   ---------------------------------------------------------- */
@media print {
    body {
        background: #fff;
    }
    .site-header,
    .site-footer,
    .card-nav,
    .back-btn,
    .nav-toggle,
    .mobile-nav {
        display: none !important;
    }
    .flow-card {
        break-inside: avoid;
        border: 1px solid #ddd;
        box-shadow: none;
        padding: 20px 24px;
        margin-bottom: 16px;
    }
    .card-track {
        display: block;
    }
    .flow-card {
        flex: none;
        width: 100%;
    }
    .module-header .step-indicator {
        display: none;
    }
    .dashboard-hero {
        background: var(--primary) !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .hierarchy-item,
    .tag,
    .db-bar .bar,
    .hair-cell .cell,
    .calc-result-box .status-tag,
    .quiz-result {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}

/* ----------------------------------------------------------
   RESPONSIVE
   ---------------------------------------------------------- */
@media (max-width: 900px) {
    .nav-desktop {
        display: none;
    }
    .nav-toggle {
        display: block;
    }
    .dashboard-hero {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px 28px;
    }
    .dashboard-hero .progress-wrap {
        align-self: stretch;
        justify-content: space-between;
    }
    .module-grid {
        grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    }
    .flow-card {
        padding: 24px 20px;
    }
    .main-wrap {
        padding: 20px 16px 40px;
    }
    .calc-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hierarchy-item {
        margin-left: 0 !important;
    }
    .db-bar .label {
        min-width: 80px;
        font-size: 0.8rem;
    }
    .db-bar .value {
        min-width: 50px;
        font-size: 0.8rem;
    }
}

@media (max-width: 500px) {
    .module-grid {
        grid-template-columns: 1fr;
    }
    .calc-grid {
        grid-template-columns: 1fr;
    }
    .calc-result-box .grid-2col {
        grid-template-columns: 1fr;
        gap: 4px;
    }
    .flow-card {
        padding: 18px 16px;
    }
    .dashboard-hero {
        padding: 20px;
    }
    .header-inner {
        padding: 0 16px;
    }
    .card-nav {
        flex-direction: column;
        align-items: stretch;
    }
    .card-nav .dots {
        order: 1;
        justify-content: center;
    }
    .card-nav .nav-btn {
        justify-content: center;
        flex: 1;
    }
    .module-header .step-indicator {
        margin-left: 0;
        width: 100%;
    }
}