/* ========================================
   CCFM - Coliving Cash-Flow Machine
   "The Blueprint That Builds Itself"
   Design System v2 — Light Professional
   ======================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

/* CSS Variables - Blueprint Design Tokens */
:root {
    /* Core Palette */
    --bg-primary: #FAFAF7;          /* Warm Cream — page background */
    --bg-secondary: #F4F4F1;        /* Soft Cream — alternating sections */
    --bg-tertiary: #EEEEEB;         /* Surface container */
    --bg-card: #FFFFFF;             /* Pure White — elevated cards */
    --bg-input: #FFFFFF;

    /* Primary (Forest) */
    --primary: #012D1D;             /* Deepest Forest — headlines, nav */
    --primary-container: #1B4332;   /* Forest Accent — button fills, dark sections */
    --on-primary: #FFFFFF;

    /* Secondary (Teal) */
    --secondary: #096875;           /* Blueprint Teal — icons, labels, accents */
    --secondary-container: #A3EEFD;

    /* Tertiary (Gold) */
    --tertiary: #EEC058;            /* Signature Gold — progress, key numbers */
    --tertiary-container: #4E3800;

    /* Text Colors */
    --text-primary: #1A1C1B;        /* Near Black — never pure black */
    --text-secondary: #414844;      /* On-surface-variant */
    --text-muted: #717973;          /* Outline */
    --text-accent: #096875;         /* Blueprint Teal */

    /* Accent Colors (mapped for backward compat) */
    --accent-primary: #096875;
    --accent-primary-hover: #07565F;
    --accent-secondary: #EEC058;

    /* Status Colors */
    --success: #1B4332;
    --warning: #EEC058;
    --danger: #BA1A1A;
    --info: #096875;

    /* Borders & Shadows */
    --border-color: #C1C8C2;
    --border-light: rgba(193, 200, 194, 0.3);
    --border-radius: 4px;
    --border-radius-sm: 2px;
    --border-radius-lg: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Typography */
    --font-headline: 'Space Grotesk', sans-serif;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-label: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1.0625rem;   /* 17px per design spec */
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Container */
    --container-max: 1200px;
    --container-narrow: 680px;      /* Lesson reading width per design */
}

/* Material Symbols config */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
}

/* Blueprint Grid Background */
.blueprint-grid {
    background-image: radial-gradient(circle, #096875 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.05;
}

/* Auth Gate - Login Overlay */
.ccfm-auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #FAFAF7 0%, #F4F4F1 50%, #E8E8E5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    font-family: var(--font-family);
}

.ccfm-auth-card {
    background: #FFFFFF;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 48px 40px;
    text-align: center;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
}

.ccfm-auth-logo {
    font-size: 3rem;
    margin-bottom: 16px;
}

.ccfm-auth-title {
    color: var(--primary);
    font-family: var(--font-headline);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.ccfm-auth-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 32px;
    line-height: 1.6;
}

.ccfm-auth-btn {
    display: inline-block;
    background: var(--primary-container);
    color: var(--on-primary);
    border: none;
    padding: 14px 40px;
    font-family: var(--font-headline);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background var(--transition-base);
}

.ccfm-auth-btn:hover {
    background: var(--primary);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.75;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headline);
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

a {
    color: var(--secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-primary-hover);
}

strong {
    color: var(--text-primary);
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-narrow {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.course-header {
    background: var(--bg-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.course-header h1 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.course-header .subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

/* Navigation Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.breadcrumb a {
    color: var(--text-muted);
}

.breadcrumb a:hover {
    color: var(--secondary);
}

.breadcrumb .separator {
    color: var(--text-muted);
    opacity: 0.5;
}

.breadcrumb .current {
    color: var(--primary);
    font-weight: 600;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.card-title {
    font-family: var(--font-headline);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0;
}

.card-body {
    color: var(--text-secondary);
}

/* Module Cards */
.module-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.module-card-header {
    padding: var(--spacing-lg);
    color: white;
}

/* All modules now use the Blueprint palette instead of rainbow colors */
.module-card-header.module-1,
.module-card-header.module-2,
.module-card-header.module-3,
.module-card-header.module-4,
.module-card-header.module-5,
.module-card-header.module-6,
.module-card-header.module-7 {
    background: var(--primary-container);
}

.module-card-body {
    padding: var(--spacing-lg);
}

.module-number {
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.module-title {
    font-family: var(--font-headline);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 0;
}

/* Lesson List */
.lesson-list {
    list-style: none;
}

.lesson-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
    transition: background var(--transition-fast);
}

.lesson-item:last-child {
    border-bottom: none;
}

.lesson-item:hover {
    background: var(--bg-secondary);
}

.lesson-item a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    color: var(--text-primary);
    text-decoration: none;
}

.lesson-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    font-family: var(--font-headline);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--secondary);
}

.lesson-title {
    flex: 1;
    font-weight: 500;
}

.lesson-status {
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
}

.lesson-status.completed {
    background: rgba(27, 67, 50, 0.1);
    color: var(--success);
}

.lesson-status.in-progress {
    background: rgba(238, 192, 88, 0.15);
    color: var(--tertiary-container);
}

.lesson-status.locked {
    background: var(--bg-secondary);
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-headline);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-container);
    color: var(--on-primary);
}

.btn-primary:hover {
    background: var(--primary);
    color: var(--on-primary);
    text-decoration: none;
}

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    color: var(--secondary);
    border: 1px solid var(--secondary);
}

.btn-outline:hover {
    background: var(--secondary);
    color: var(--on-primary);
    text-decoration: none;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-block {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-label);
    font-weight: 600;
    color: var(--primary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-label-hint {
    font-weight: 400;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-transform: none;
    letter-spacing: 0;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(9, 104, 117, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--danger);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: var(--secondary);
    cursor: pointer;
}

.form-check-label {
    cursor: pointer;
    color: var(--text-secondary);
}

/* Range Slider */
.form-range {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    appearance: none;
    cursor: pointer;
}

.form-range::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-light);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

th, td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

th {
    font-family: var(--font-label);
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: white;
    background: var(--secondary);
}

td {
    color: var(--text-secondary);
}

tr:hover td {
    background: var(--bg-secondary);
}

/* Alerts */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert-success {
    background: rgba(27, 67, 50, 0.06);
    border-color: var(--success);
    color: var(--success);
}

.alert-warning {
    background: rgba(238, 192, 88, 0.1);
    border-color: var(--tertiary);
    color: var(--tertiary-container);
}

.alert-danger {
    background: rgba(186, 26, 26, 0.06);
    border-color: var(--danger);
    color: var(--danger);
}

.alert-info {
    background: rgba(9, 104, 117, 0.06);
    border-color: var(--info);
    color: var(--info);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    font-weight: 700;
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.badge-success { background: rgba(27, 67, 50, 0.1); color: var(--success); }
.badge-warning { background: rgba(51, 51, 51, 0.1); color: #444; }
.badge-danger { background: rgba(186, 26, 26, 0.08); color: var(--danger); }
.badge-info { background: rgba(9, 104, 117, 0.08); color: var(--info); }
.badge-primary { background: rgba(9, 104, 117, 0.08); color: var(--secondary); }

/* Progress Bar */
.progress {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--tertiary);
    border-radius: 4px;
    transition: width var(--transition-slow);
}

/* Lesson Audio Player */
.lesson-audio-bar {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.lesson-audio-bar .audio-icon {
    font-size: 1.5rem;
    color: var(--secondary);
    flex-shrink: 0;
}

.lesson-audio-bar .audio-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    flex-shrink: 0;
}

.lesson-audio-bar audio {
    flex: 1;
    min-width: 0;
    height: 36px;
}

/* Lesson Resource Downloads */
.lesson-resources {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.lesson-resources h3 {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.lesson-resources .resource-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.lesson-resources .resource-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--secondary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.lesson-resources .resource-link:hover {
    background: var(--secondary);
    color: #fff;
    border-color: var(--secondary);
}

/* Callout Boxes — "Field Notes" */
.callout {
    position: relative;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border-left: 2px solid;
    background: #F5F0E6;
    box-shadow: 4px 4px 0px #E2E3E0;
}

.callout-title {
    font-family: var(--font-label);
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.callout-tip {
    border-color: var(--secondary);
}

.callout-tip .callout-title { color: var(--secondary); }

.callout-warning {
    border-color: var(--tertiary);
}

.callout-warning .callout-title { color: var(--tertiary-container); }

.callout-important {
    border-color: var(--danger);
}

.callout-important .callout-title { color: var(--danger); }

.callout-note {
    border-color: var(--secondary);
}

.callout-note .callout-title { color: var(--secondary); }

/* Track Labels (PadSplit vs Self-Managed) */
.track-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    font-weight: 700;
    border-radius: 2px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.track-padsplit {
    background: rgba(9, 104, 117, 0.08);
    color: var(--secondary);
}

.track-self-managed {
    background: rgba(27, 67, 50, 0.08);
    color: var(--primary-container);
}

.track-both {
    background: rgba(238, 192, 88, 0.15);
    color: var(--tertiary-container);
}

/* Content Sections */
.lesson-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.lesson-section {
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-headline);
    font-size: var(--font-size-2xl);
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
    color: var(--text-secondary);
}

li {
    margin-bottom: var(--spacing-sm);
}

ul.checklist {
    list-style: none;
    padding-left: 0;
}

ul.checklist li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

ul.checklist li:last-child {
    border-bottom: none;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Spacing Utilities */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

/* Text Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-warning { color: var(--tertiary-container); }
.text-danger { color: var(--danger); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.font-bold { font-weight: 700; }

/* Icon Placeholder (for emoji icons) */
.icon {
    font-size: 1.2em;
    line-height: 1;
}

/* Worksheet Styles */
.worksheet {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.worksheet-header {
    background: var(--primary-container);
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
    color: white;
}

.worksheet-title {
    font-family: var(--font-headline);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    color: white;
}

.worksheet-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-base);
}

.worksheet-body {
    padding: var(--spacing-xl);
}

.worksheet-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.worksheet-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.worksheet-section-title {
    font-family: var(--font-headline);
    font-size: var(--font-size-lg);
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
}

/* Example Box */
.example-box {
    background: var(--bg-secondary);
    border: 1px dashed var(--secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.example-box-title {
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

/* Calculator Styles */
.calculator {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.calculator-header {
    background: var(--primary-container);
    padding: var(--spacing-lg);
    color: white;
}

.calculator-body {
    padding: var(--spacing-lg);
}

.calculator-result {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    margin-top: var(--spacing-lg);
    border: 1px solid var(--border-light);
}

.calculator-result-value {
    font-family: var(--font-mono);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--secondary);
}

.calculator-result-label {
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-weight: 700;
}

/* Score Display */
.score-display {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    font-family: var(--font-mono);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.score-excellent {
    background: rgba(27, 67, 50, 0.08);
    color: var(--success);
    border: 4px solid var(--success);
}

.score-good {
    background: rgba(238, 192, 88, 0.1);
    color: var(--tertiary-container);
    border: 4px solid var(--tertiary);
}

.score-poor {
    background: rgba(186, 26, 26, 0.06);
    color: var(--danger);
    border: 4px solid var(--danger);
}

/* Navigation Footer */
.lesson-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.lesson-nav-prev,
.lesson-nav-next {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.lesson-nav-prev { align-items: flex-start; }
.lesson-nav-next { align-items: flex-end; }

.lesson-nav-label {
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
}

.lesson-nav-title {
    font-weight: 500;
    color: var(--secondary);
}

/* Download Section */
.lesson-downloads {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    border: 1px solid var(--border-light);
}

.lesson-downloads h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.download-row {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.download-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.download-link:hover {
    border-color: var(--secondary);
    color: var(--secondary);
}

.download-link .icon {
    font-family: var(--font-label);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--secondary);
    background: rgba(9, 104, 117, 0.08);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 2px;
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: #1A1C1B;
    }

    .course-header,
    .breadcrumb,
    .lesson-nav,
    .lesson-downloads,
    .btn {
        display: none;
    }

    .card,
    .worksheet {
        border: 1px solid #ccc;
        box-shadow: none;
    }

    .form-input,
    .form-textarea {
        border: 1px solid #ccc;
        background: white;
    }

    .callout {
        box-shadow: none;
    }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.25rem;
    }

    .container,
    .container-narrow {
        padding: 0 var(--spacing-md);
    }

    .course-header {
        padding: var(--spacing-lg) 0;
    }

    .lesson-nav {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .lesson-nav-prev,
    .lesson-nav-next {
        align-items: center;
        text-align: center;
    }

    .download-row {
        flex-direction: column;
    }
}

/* ========================================
   Download / Print Button for Deliverables
   ======================================== */

.download-bar {
    position: sticky;
    bottom: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: center;
    z-index: 50;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.06);
}

.download-bar .btn-download {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-xl);
    background: var(--secondary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-size-sm);
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.download-bar .btn-download:hover {
    background: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(9, 104, 117, 0.3);
}

/* Print-friendly styles */
@media print {
    /* Hide nav, buttons, non-content elements */
    nav, .breadcrumb, .lesson-nav, .download-bar,
    .btn, button, .ccfm-auth-overlay,
    script, .course-header .badge {
        display: none !important;
    }

    /* Clean background */
    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 11pt;
    }

    /* Show all content */
    main, .container-narrow, .worksheet, .card {
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0.5rem !important;
        box-shadow: none !important;
        border: none !important;
        background: #fff !important;
    }

    /* Show form values */
    textarea, input[type="text"], input[type="number"], select {
        border: 1px solid #ccc !important;
        background: #f9f9f9 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    /* Show checked checkboxes */
    input[type="checkbox"] {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    /* Keep callouts visible */
    .callout {
        border: 1px solid #ddd !important;
        background: #f5f5f5 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    /* Page breaks */
    .worksheet-section {
        page-break-inside: avoid;
    }

    h1, h2, h3 {
        page-break-after: avoid;
    }

    .quiz-section, .download-bar {
        display: none !important;
    }
}

/* ========================================
   Quiz — "Check Your Understanding"
   ======================================== */

.quiz-section {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.quiz-section .section-title {
    margin-bottom: var(--spacing-lg);
}

.quiz-question {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.quiz-question-text {
    font-weight: 600;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    display: flex;
    gap: var(--spacing-sm);
}

.quiz-question-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: var(--secondary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 700;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.quiz-option {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-primary);
}

.quiz-option:hover {
    border-color: var(--secondary);
    background: rgba(9, 104, 117, 0.03);
}

.quiz-option input[type="radio"] {
    margin-top: 3px;
    flex-shrink: 0;
    accent-color: var(--secondary);
}

.quiz-option.correct {
    border-color: var(--success);
    background: rgba(56, 142, 60, 0.06);
}

.quiz-option.incorrect {
    border-color: var(--danger);
    background: rgba(186, 26, 26, 0.04);
}

.quiz-option.correct-answer {
    border-color: var(--success);
    background: rgba(56, 142, 60, 0.06);
}

.quiz-explanation {
    display: none;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(9, 104, 117, 0.04);
    border-left: 2px solid var(--secondary);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.quiz-explanation.visible {
    display: block;
}

.quiz-actions {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.quiz-results {
    display: none;
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-align: center;
}

.quiz-results.visible {
    display: block;
}

.quiz-score {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--secondary);
}

.quiz-score-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}