/* ============================================================
   ASU Prep Seminar Library
   Built on ASU Prep Design System tokens
   Brand: Maroon #8C1D40 + Gold #FFC627 + ASU Web Grayscale
   ============================================================ */

:root {
    /* Brand — primary */
    --color-maroon:        #8C1D40;
    --color-maroon-dark:   #6B1530;
    --color-maroon-light:  #A8284F;
    --color-gold:          #FFC627;
    --color-gold-dark:     #E0A800;
    --color-gold-light:    #FFD45E;

    /* Brand — secondary (sparingly) */
    --color-blue:          #00A3E0;
    --color-blue-dark:     #007DB0;
    --color-orange:        #FF7F32;
    --color-green:         #78BE20;
    --color-green-dark:    #5E9918;
    --color-gray-brand:    #5C6670;

    /* Grayscale */
    --color-gray-1:        #191919;
    --color-gray-2:        #484848;
    --color-gray-3:        #5C6670;
    --color-gray-4:        #BFBFBF;
    --color-gray-5:        #D0D0D0;
    --color-gray-6:        #E8E8E8;
    --color-gray-7:        #F5F5F5;
    --color-white:         #FFFFFF;

    /* Tints */
    --bg-brand-light:      #f9f0f3;
    --bg-gold-light:       #fff8e1;

    /* Type */
    --font-sans: Arial, Helvetica, sans-serif;

    /* Spacing — 4px grid */
    --s-1: 0.25rem;
    --s-2: 0.5rem;
    --s-3: 0.75rem;
    --s-4: 1rem;
    --s-5: 1.25rem;
    --s-6: 1.5rem;
    --s-8: 2rem;
    --s-10: 2.5rem;
    --s-12: 3rem;
    --s-16: 4rem;
    --s-20: 5rem;
    --s-24: 6rem;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 9999px;

    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.05);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.06);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;

    /* Layout */
    --max-w: 1200px;
    --max-w-narrow: 760px;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-gray-1);
    background: var(--color-gray-7);
}

/* ============================================================
   Typography
   ============================================================ */

h1, h2, h3, h4, h5 {
    font-family: var(--font-sans);
    color: var(--color-gray-1);
}

h1 {
    font-size: clamp(2.25rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

h2 {
    font-size: clamp(1.625rem, 2.6vw, 2.25rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.005em;
}

h3 {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
}

h4 {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.4;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-maroon);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-maroon-dark);
}

a.no-underline {
    text-decoration: none;
}

.eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-maroon);
}

.eyebrow-gold {
    color: var(--color-gold-dark);
}

/* ============================================================
   Layout primitives
   ============================================================ */

.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--s-6);
}

.container-narrow {
    max-width: var(--max-w-narrow);
    margin: 0 auto;
    padding: 0 var(--s-6);
}

.section {
    padding: var(--s-12) 0;
}

.section-sm {
    padding: var(--s-8) 0;
}

.divider {
    height: 1px;
    background: var(--color-gray-6);
    border: 0;
    margin: var(--s-8) 0;
}

/* ============================================================
   Site header (navbar)
   ============================================================ */

.site-header {
    background: var(--color-maroon);
    height: 64px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 200;
    box-shadow: var(--shadow-sm);
}

.site-header-inner {
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--s-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    color: var(--color-white);
    text-decoration: none;
}

.brand:hover {
    color: var(--color-white);
}

.brand-logo {
    width: 36px;
    height: 36px;
    background: var(--color-gold);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.brand-logo-text {
    font-size: 0.8125rem;
    font-weight: 900;
    color: var(--color-maroon);
    letter-spacing: -0.02em;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-name {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: -0.005em;
}

.brand-sub {
    font-size: 0.6875rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 2px;
}

.site-nav {
    display: flex;
    gap: var(--s-1);
    align-items: center;
}

.site-nav a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.8);
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.site-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

.site-nav a.active {
    background: rgba(255, 255, 255, 0.12);
    color: var(--color-gold);
    font-weight: 600;
}

.site-nav a.external::after {
    content: '';
    display: inline-block;
    width: 0.6em;
    height: 0.6em;
    margin-left: 0.4em;
    border: 1.5px solid currentColor;
    border-left: 0;
    border-bottom: 0;
    transform: rotate(45deg) translateY(-1px);
    vertical-align: middle;
    opacity: 0.7;
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
    background: linear-gradient(135deg, var(--color-maroon) 0%, var(--color-maroon-dark) 100%);
    color: var(--color-white);
    padding: var(--s-16) 0 var(--s-12);
    border-bottom: 4px solid var(--color-gold);
}

.hero-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--s-6);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-8);
}

@media (min-width: 820px) {
    .hero-inner {
        grid-template-columns: 1.5fr 1fr;
        gap: var(--s-10);
        align-items: end;
    }
}

.hero-eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-gold);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--s-4);
}

.hero h1 {
    color: var(--color-white);
    font-size: clamp(2.25rem, 4.5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--s-5);
    letter-spacing: -0.015em;
}

.hero-lede {
    font-size: 1.125rem;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.85);
    max-width: 50ch;
    margin-bottom: 0;
}

.hero-meta {
    padding: var(--s-5);
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
}

.hero-meta strong {
    color: var(--color-gold);
    font-weight: 700;
    display: block;
    margin-bottom: var(--s-2);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
}

/* ============================================================
   Search + filters
   ============================================================ */

.search-section {
    padding: var(--s-8) 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-6);
}

.search-bar {
    position: relative;
    margin-bottom: var(--s-5);
}

.search-input {
    width: 100%;
    padding: 0.875rem 1.125rem 0.875rem 3rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 1px solid var(--color-gray-5);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    color: var(--color-gray-1);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-maroon);
    box-shadow: 0 0 0 3px rgba(140, 29, 64, 0.12);
}

.search-input::placeholder {
    color: var(--color-gray-3);
}

.search-icon {
    position: absolute;
    left: var(--s-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-3);
    pointer-events: none;
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--s-2);
}

.filter-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    color: var(--color-gray-3);
    margin-right: var(--s-2);
}

.filter-chip {
    padding: 0.5rem 0.875rem;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1.5px solid var(--color-gray-5);
    background: var(--color-white);
    color: var(--color-gray-2);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-chip:hover {
    border-color: var(--color-maroon);
    color: var(--color-maroon);
}

.filter-chip.active {
    background: var(--color-maroon);
    border-color: var(--color-maroon);
    color: var(--color-white);
}

.results-meta {
    margin-top: var(--s-5);
    font-size: 0.875rem;
    color: var(--color-gray-3);
}

.results-meta strong {
    color: var(--color-gray-1);
    font-weight: 700;
}

/* ============================================================
   Category sections
   ============================================================ */

.category-section {
    padding: var(--s-10) 0;
    border-bottom: 1px solid var(--color-gray-6);
}

.category-section:last-child {
    border-bottom: 0;
}

.category-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: var(--s-3);
    gap: var(--s-4);
    flex-wrap: wrap;
}

.category-title-row {
    display: flex;
    align-items: baseline;
    gap: var(--s-4);
}

.category-num {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-gold-dark);
    letter-spacing: 0.05em;
}

.category-count {
    font-size: 0.8125rem;
    color: var(--color-gray-3);
    font-weight: 600;
}

.category-desc {
    color: var(--color-gray-2);
    max-width: 60ch;
    margin-bottom: var(--s-6);
    font-size: 1rem;
    line-height: 1.55;
}

/* ============================================================
   Topic cards
   ============================================================ */

.topic-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-5);
}

@media (min-width: 720px) {
    .topic-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1080px) {
    .topic-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.topic-card {
    display: flex;
    flex-direction: column;
    padding: var(--s-5);
    background: var(--color-white);
    border: 1px solid var(--color-gray-6);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    color: var(--color-gray-1);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    min-height: 240px;
    position: relative;
}

.topic-card:hover {
    border-color: var(--color-maroon);
    color: var(--color-gray-1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.topic-card.placeholder {
    background: var(--color-white);
    border-style: dashed;
    border-color: var(--color-gray-5);
    color: var(--color-gray-3);
    cursor: default;
    box-shadow: none;
}

.topic-card.placeholder:hover {
    border-color: var(--color-gray-5);
    color: var(--color-gray-3);
    transform: none;
    box-shadow: none;
}

.topic-card-badges {
    display: flex;
    gap: var(--s-2);
    margin-bottom: var(--s-3);
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-maroon { background: var(--bg-brand-light); color: var(--color-maroon); }
.badge-gold { background: var(--bg-gold-light); color: #856000; }
.badge-blue { background: #e6f5fc; color: var(--color-blue-dark); }
.badge-green { background: #f0f8e6; color: #4a7a10; }
.badge-gray { background: var(--color-gray-7); color: var(--color-gray-3); }

.topic-card-title {
    font-size: 1.1875rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: var(--s-3);
    color: var(--color-gray-1);
    letter-spacing: -0.005em;
}

.topic-card.placeholder .topic-card-title {
    color: var(--color-gray-2);
}

.topic-card-summary {
    font-size: 0.9375rem;
    color: var(--color-gray-2);
    line-height: 1.5;
    margin-bottom: var(--s-4);
    flex-grow: 1;
}

.topic-card.placeholder .topic-card-summary {
    color: var(--color-gray-3);
}

.topic-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--s-4);
    border-top: 1px solid var(--color-gray-6);
    font-size: 0.8125rem;
    color: var(--color-gray-3);
}

.topic-card-cta {
    font-weight: 700;
    color: var(--color-maroon);
    font-size: 0.8125rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.topic-card:hover .topic-card-cta {
    color: var(--color-maroon-dark);
}

.topic-card-cta::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.topic-card:hover .topic-card-cta::after {
    transform: translateX(3px);
}

/* ============================================================
   Topic page
   ============================================================ */

.topic-hero {
    background: var(--color-white);
    padding: var(--s-10) 0 var(--s-8);
    border-bottom: 1px solid var(--color-gray-6);
}

.breadcrumbs {
    display: flex;
    gap: var(--s-2);
    font-size: 0.8125rem;
    color: var(--color-gray-3);
    margin-bottom: var(--s-5);
    align-items: center;
    flex-wrap: wrap;
}

.breadcrumbs a {
    color: var(--color-gray-3);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--color-maroon);
    text-decoration: underline;
}

.breadcrumbs .sep {
    color: var(--color-gray-4);
}

.topic-hero h1 {
    margin-bottom: var(--s-5);
    color: var(--color-gray-1);
}

.topic-hero-summary {
    font-size: 1.1875rem;
    line-height: 1.55;
    color: var(--color-gray-2);
    max-width: 60ch;
}

/* Resource bar — the big CTA block */
.resource-bar {
    margin: var(--s-8) 0 var(--s-10);
    background: var(--color-maroon);
    color: var(--color-white);
    padding: var(--s-8) var(--s-6);
    border-radius: var(--radius-lg);
    border-bottom: 4px solid var(--color-gold);
}

.resource-bar-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-6);
}

@media (min-width: 760px) {
    .resource-bar-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.resource-item {
    padding: 0;
    position: relative;
}

@media (min-width: 760px) {
    .resource-item:not(:last-child)::after {
        content: '';
        position: absolute;
        right: calc(var(--s-6) / -2);
        top: 0;
        bottom: 0;
        width: 1px;
        background: rgba(255, 255, 255, 0.18);
    }
}

.resource-label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-gold);
    font-weight: 700;
    margin-bottom: var(--s-3);
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-white);
    text-decoration: none;
    transition: color var(--transition-fast);
    margin-bottom: var(--s-2);
}

.resource-link:hover {
    color: var(--color-gold);
}

.resource-link svg {
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.resource-link:hover svg {
    transform: translate(2px, -2px);
}

.resource-sublabel {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.65);
    margin: 0;
}

/* Weekly plan section */
.section-title {
    margin-bottom: var(--s-5);
    display: flex;
    align-items: baseline;
    gap: var(--s-4);
    flex-wrap: wrap;
}

.section-num {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-gold-dark);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.week-tab-row {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-gray-6);
    margin-bottom: var(--s-6);
}

.week-tab {
    padding: var(--s-4) var(--s-5);
    border: 0;
    background: transparent;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-3);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition-fast);
}

.week-tab:hover {
    color: var(--color-gray-1);
}

.week-tab.active {
    color: var(--color-maroon);
    border-bottom-color: var(--color-maroon);
}

.week-tab-content {
    display: none;
}

.week-tab-content.active {
    display: block;
}

.day-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
    padding: var(--s-6) 0;
    border-bottom: 1px solid var(--color-gray-6);
}

@media (min-width: 720px) {
    .day-row {
        grid-template-columns: 160px 1fr;
        gap: var(--s-8);
    }
}

.day-row:last-child {
    border-bottom: 0;
}

.day-label {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gray-1);
    letter-spacing: -0.005em;
}

.day-label-sub {
    font-size: 0.75rem;
    color: var(--color-maroon);
    margin-top: var(--s-1);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.day-content h4 {
    font-size: 1.0625rem;
    color: var(--color-gray-1);
    margin-bottom: var(--s-3);
    font-weight: 700;
}

.day-content p {
    color: var(--color-gray-2);
    margin-bottom: var(--s-3);
}

.day-content ul {
    margin: var(--s-2) 0 var(--s-3) var(--s-5);
    color: var(--color-gray-2);
}

.day-content li {
    margin-bottom: var(--s-2);
}

.day-content a {
    word-break: break-word;
}

.callout {
    padding: var(--s-3) var(--s-4);
    background: var(--bg-brand-light);
    margin: var(--s-4) 0;
    font-size: 0.9375rem;
    color: var(--color-gray-2);
    line-height: 1.55;
    border-radius: var(--radius-sm);
}

.callout strong {
    color: var(--color-maroon);
    font-weight: 700;
}

.callout-gold {
    background: var(--bg-gold-light);
}

.callout-gold strong {
    color: #856000;
}

.callout-gray {
    background: var(--color-gray-7);
}

.callout-gray strong {
    color: var(--color-gray-1);
}

/* Notebook viewer section */
.notebook-section {
    padding: var(--s-10) 0;
    background: var(--color-gray-7);
}

.notebook-toolbar {
    display: flex;
    gap: var(--s-3);
    flex-wrap: wrap;
    margin-bottom: var(--s-6);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    padding: 0.625rem 1.25rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    background: var(--color-maroon);
    color: var(--color-white);
    cursor: pointer;
    transition: background var(--transition-fast);
    border-radius: var(--radius-sm);
    text-decoration: none;
}

.btn:hover {
    background: var(--color-maroon-dark);
    color: var(--color-white);
}

.btn-gold {
    background: var(--color-gold);
    color: var(--color-gray-1);
}

.btn-gold:hover {
    background: var(--color-gold-dark);
    color: var(--color-gray-1);
}

.btn-outline {
    background: transparent;
    color: var(--color-maroon);
    border: 2px solid var(--color-maroon);
    padding: calc(0.625rem - 2px) calc(1.25rem - 2px);
}

.btn-outline:hover {
    background: var(--color-maroon);
    color: var(--color-white);
}

.btn-ghost {
    background: transparent;
    color: var(--color-gray-2);
    border: 1.5px solid var(--color-gray-5);
    padding: calc(0.625rem - 1.5px) calc(1.25rem - 1.5px);
}

.btn-ghost:hover {
    background: var(--color-gray-6);
    color: var(--color-gray-1);
}

.notebook-pages {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
}

.notebook-page {
    background: var(--color-white);
    border: 1px solid var(--color-gray-6);
    padding: var(--s-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.notebook-page-num {
    position: absolute;
    top: var(--s-4);
    right: var(--s-5);
    font-size: 0.75rem;
    color: var(--color-gray-4);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.notebook-page-eyebrow {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-maroon);
    font-weight: 700;
    margin-bottom: var(--s-2);
}

.notebook-page h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--s-4);
    color: var(--color-gray-1);
}

.notebook-page p, .notebook-page ul {
    font-size: 0.9375rem;
    color: var(--color-gray-2);
    margin-bottom: var(--s-3);
    line-height: 1.55;
}

.notebook-page ul {
    margin-left: var(--s-5);
}

.notebook-page li {
    margin-bottom: var(--s-1);
}

.notebook-page .student-field {
    background: var(--color-gray-7);
    border: 1.5px dashed var(--color-gray-5);
    padding: var(--s-3) var(--s-4);
    margin: var(--s-3) 0;
    color: var(--color-gray-3);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
}

.week-divider {
    text-align: center;
    padding: var(--s-5) 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-maroon);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-top: 2px solid var(--color-gold);
    border-bottom: 2px solid var(--color-gold);
    margin: var(--s-4) 0;
    background: var(--bg-gold-light);
    border-radius: var(--radius-sm);
}

/* Standards section */
.standards-section {
    padding: var(--s-10) 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-6);
    border-bottom: 1px solid var(--color-gray-6);
}

.standards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-4);
}

@media (min-width: 720px) {
    .standards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1000px) {
    .standards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.standards-card {
    padding: var(--s-5);
    background: var(--color-white);
    border: 1px solid var(--color-gray-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.standards-card h4 {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-maroon);
    margin-bottom: var(--s-2);
    font-weight: 700;
}

.standards-card p {
    font-size: 0.9375rem;
    color: var(--color-gray-2);
    margin: 0;
    line-height: 1.5;
}

/* Facilitator notes */
.facilitator-section {
    padding: var(--s-10) 0;
}

.facilitator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-5);
    margin-top: var(--s-5);
}

@media (min-width: 720px) {
    .facilitator-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.facilitator-card {
    padding: var(--s-6);
    background: var(--color-white);
    border: 1px solid var(--color-gray-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.facilitator-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--s-4);
    color: var(--color-gray-1);
}

.facilitator-card ul {
    margin-left: var(--s-5);
    color: var(--color-gray-2);
}

.facilitator-card li {
    margin-bottom: var(--s-3);
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* ============================================================
   About section
   ============================================================ */

.about-section {
    padding: var(--s-12) 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-6);
}

.about-section h2 {
    margin-bottom: var(--s-5);
}

.about-section p {
    color: var(--color-gray-2);
    font-size: 1.0625rem;
    line-height: 1.6;
    margin-bottom: var(--s-4);
}

.about-section ul {
    margin: var(--s-3) 0 var(--s-5) var(--s-6);
    color: var(--color-gray-2);
}

.about-section li {
    margin-bottom: var(--s-2);
    font-size: 1rem;
}

.about-section strong {
    color: var(--color-gray-1);
    font-weight: 700;
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
    background: var(--color-gray-1);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--s-12) 0 var(--s-6);
    margin-top: var(--s-12);
}

.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--s-6);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--s-8);
}

@media (min-width: 720px) {
    .footer-inner {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    margin-bottom: var(--s-4);
    color: var(--color-white);
    text-decoration: none;
}

.footer-brand:hover {
    color: var(--color-white);
}

.footer-brand-name {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--color-white);
}

.footer-brand-sub {
    font-size: 0.75rem;
    color: var(--color-gold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 2px;
}

.footer-section h5 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gold);
    margin-bottom: var(--s-3);
    font-weight: 700;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 0;
    max-width: 40ch;
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin-bottom: var(--s-2);
    text-decoration: none;
}

.footer-section a:hover {
    color: var(--color-gold);
}

.footer-bottom {
    max-width: var(--max-w);
    margin: var(--s-8) auto 0;
    padding: var(--s-5) var(--s-6) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.45);
}

/* ============================================================
   Utility
   ============================================================ */

.hidden {
    display: none !important;
}

/* Print styles */
@media print {
    .site-header,
    .site-footer,
    .notebook-toolbar,
    .breadcrumbs,
    .topic-hero,
    .resource-bar {
        display: none;
    }

    body {
        background: white;
    }

    .notebook-page {
        page-break-inside: avoid;
        page-break-after: always;
        border: 1px solid #ccc;
        box-shadow: none;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}