/* =====================================================
   HIGHLAND EDUCATION PORTAL - DESIGN SYSTEM
   Matches Highland Longevity website aesthetic
   ===================================================== */

/* =====================================================
   DESIGN TOKENS
   ===================================================== */

:root {
  /* Colors */
  --color-primary: #4069a1;
  --color-primary-dark: #345580;
  --color-primary-light: #5a84b8;
  --color-navy: #0d1b2a;
  --color-navy-light: #1b2d45;
  --color-teal: #5ba89d;
  --color-teal-light: #e8f4f2;
  --color-gold: #c9a96e;
  --color-gold-light: #f5edd8;
  --color-cream: #f8f6f1;
  --color-cream-dark: #eee9df;
  --color-white: #ffffff;
  --color-text: #2c2c2c;
  --color-text-light: #6b7280;
  --color-text-muted: #9ca3af;
  --color-border: #e5e0d8;
  --color-error: #dc3545;
  --color-error-bg: #fef2f2;
  --color-success: #059669;
  --color-success-bg: #ecfdf5;

  /* Typography */
  --font-heading: 'Libre Baskerville', Georgia, serif;
  --font-body: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Sizing */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --max-width-content: 900px;
  --header-height: 72px;
  --card-radius: 8px;
  --button-radius: 9999px;
  --input-radius: 6px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(64, 105, 161, 0.06);
  --shadow-md: 0 4px 12px rgba(64, 105, 161, 0.08);
  --shadow-lg: 0 8px 24px rgba(64, 105, 161, 0.12);
  --shadow-xl: 0 12px 36px rgba(64, 105, 161, 0.16);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================
   RESET & BASE
   ===================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-cream);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-navy);
}

h1 { font-size: var(--font-size-4xl); margin-bottom: var(--space-lg); }
h2 { font-size: var(--font-size-3xl); margin-bottom: var(--space-md); }
h3 { font-size: var(--font-size-2xl); margin-bottom: var(--space-md); }
h4 { font-size: var(--font-size-xl); margin-bottom: var(--space-sm); }

p {
  margin-bottom: var(--space-md);
}

/* =====================================================
   LAYOUT
   ===================================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--content {
  max-width: var(--max-width-content);
}

/* =====================================================
   HEADER
   ===================================================== */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-navy);
}

.header__logo img {
  height: 36px;
  width: auto;
}

.header__logo-text {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-navy);
}

.header__logo-sub {
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 400;
  display: block;
  margin-top: -2px;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header__nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-light);
  text-decoration: none;
  padding: var(--space-sm) 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.header__user {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header__greeting {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.header__signout {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-body);
  transition: color var(--transition-fast);
}

.header__signout:hover {
  color: var(--color-error);
}

/* Mobile header */
.header__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-navy);
}

.header__menu-btn svg {
  width: 24px;
  height: 24px;
}

/* =====================================================
   BUTTONS
   ===================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--button-radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

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

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-light);
  border-color: transparent;
  padding: 0.5rem 1rem;
}

.btn--ghost:hover {
  color: var(--color-primary);
  background: rgba(64, 105, 161, 0.05);
}

.btn--full {
  width: 100%;
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--font-size-xs);
}

.btn--lg {
  padding: 1rem 2.5rem;
  font-size: var(--font-size-base);
}

/* =====================================================
   FORMS / AUTH
   ===================================================== */

.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  background: var(--color-cream);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-white);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2xl);
}

.auth-card__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--space-xl);
}

.auth-card__logo img {
  height: 48px;
  margin-bottom: var(--space-md);
}

.auth-card__logo h1 {
  font-size: var(--font-size-2xl);
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
  text-align: center;
}

.auth-card__logo p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  text-align: center;
  margin: 0;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--input-radius);
  background: var(--color-white);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(64, 105, 161, 0.15);
}

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

.form-message {
  padding: 0.75rem 1rem;
  border-radius: var(--input-radius);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-md);
  display: none;
}

.form-message--error {
  display: block;
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid rgba(220, 53, 69, 0.2);
}

.form-message--success {
  display: block;
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(5, 150, 105, 0.2);
}

.auth-card__toggle {
  text-align: center;
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.auth-card__toggle a {
  font-weight: 600;
  cursor: pointer;
}

.auth-card__forgot {
  text-align: right;
  margin-top: calc(-1 * var(--space-sm));
  margin-bottom: var(--space-lg);
}

.auth-card__forgot a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
}

.auth-card__forgot a:hover {
  color: var(--color-primary);
}

/* =====================================================
   HERO / SEARCH
   ===================================================== */

.hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-primary) 100%);
  padding: var(--space-3xl) 0;
  color: var(--color-white);
  text-align: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-sm);
}

.hero p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xl);
}

.search-bar {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.search-bar input {
  width: 100%;
  padding: 1rem 1.25rem 1rem 3rem;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: none;
  border-radius: var(--button-radius);
  background: var(--color-white);
  color: var(--color-text);
  box-shadow: var(--shadow-lg);
  transition: box-shadow var(--transition-base);
}

.search-bar input:focus {
  outline: none;
  box-shadow: var(--shadow-xl), 0 0 0 3px rgba(64, 105, 161, 0.3);
}

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

.search-bar__icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-bar__icon svg {
  width: 20px;
  height: 20px;
}

.search-bar__clear {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: var(--space-sm);
  display: none;
  font-size: var(--font-size-lg);
  line-height: 1;
}

.search-bar__clear--visible {
  display: block;
}

.search-results-count {
  text-align: center;
  padding: var(--space-md) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* =====================================================
   CATEGORY GRID
   ===================================================== */

.categories-section {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.categories-section__title {
  text-align: center;
  margin-bottom: var(--space-2xl);
  font-size: var(--font-size-2xl);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.category-card {
  background: var(--color-white);
  border-radius: var(--card-radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  display: block;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.category-card__icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.category-card__name {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.category-card__count {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.category-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.5;
}

/* =====================================================
   BRIEF LIST
   ===================================================== */

.brief-list-section {
  padding: var(--space-xl) 0 var(--space-3xl);
}

.brief-list-section__header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.brief-list-section__back {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-body);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.brief-list-section__back:hover {
  color: var(--color-primary);
}

.brief-list {
  list-style: none;
}

.brief-list__item {
  background: var(--color-white);
  border-radius: var(--card-radius);
  padding: var(--space-lg) var(--space-xl);
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  cursor: pointer;
}

.brief-list__item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
  transform: translateX(4px);
}

.brief-list__item a {
  text-decoration: none;
  color: inherit;
  display: block;
}

.brief-list__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.brief-list__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.brief-list__summary {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* =====================================================
   BRIEF VIEWER
   ===================================================== */

.brief-page {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-3xl);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

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

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

.brief-header {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 2px solid var(--color-border);
}

.brief-header__badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(64, 105, 161, 0.1);
  color: var(--color-primary);
  border-radius: var(--button-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.brief-header__title {
  font-size: var(--font-size-3xl);
  line-height: 1.25;
  margin-bottom: var(--space-md);
}

.brief-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* =====================================================
   MARKDOWN CONTENT
   ===================================================== */

.brief-content {
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.brief-content h1 {
  font-size: var(--font-size-3xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-lg);
}

.brief-content h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.brief-content h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.brief-content h4 {
  font-size: var(--font-size-lg);
  margin-top: var(--space-lg);
}

.brief-content p {
  margin-bottom: var(--space-md);
}

.brief-content ul, .brief-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.brief-content li {
  margin-bottom: var(--space-sm);
}

.brief-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-lg) 0;
  background: rgba(64, 105, 161, 0.04);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  color: var(--color-text-light);
  font-style: italic;
}

.brief-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-2xl) 0;
}

.brief-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-cream);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.brief-content pre {
  background: var(--color-navy);
  color: #e2e8f0;
  padding: var(--space-lg);
  border-radius: var(--card-radius);
  overflow-x: auto;
  margin-bottom: var(--space-lg);
}

.brief-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.brief-content strong {
  font-weight: 700;
  color: var(--color-navy);
}

/* Styled tables */
.brief-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: var(--font-size-sm);
  overflow-x: auto;
  display: block;
}

.brief-content thead {
  display: table-header-group;
}

.brief-content tbody {
  display: table-row-group;
}

.brief-content tr {
  display: table-row;
}

.brief-content table {
  display: table;
  overflow-x: auto;
}

@media (max-width: 768px) {
  .brief-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

.brief-content thead tr {
  background: var(--color-primary);
  color: var(--color-white);
}

.brief-content th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

.brief-content td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.brief-content tbody tr:nth-child(even) {
  background: var(--color-cream);
}

.brief-content tbody tr:hover {
  background: var(--color-cream-dark);
}

/* Bottom Line highlight */
.brief-content .bottom-line,
.brief-content h2#bottom-line + *,
.brief-content h2#bottom-line ~ p,
.brief-content h2#bottom-line ~ ul {
  /* Handled via JS wrapper */
}

.bottom-line-box {
  background: var(--color-teal-light);
  border-left: 4px solid var(--color-teal);
  padding: var(--space-lg) var(--space-xl);
  border-radius: 0 var(--card-radius) var(--card-radius) 0;
  margin: var(--space-xl) 0;
}

.bottom-line-box h2 {
  color: var(--color-teal);
  border-bottom: none;
  padding-bottom: 0;
  font-size: var(--font-size-xl);
  margin-top: 0;
}

/* Medical disclaimer styling */
.disclaimer-box {
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--card-radius);
  margin: var(--space-xl) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.disclaimer-box h2 {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  border-bottom: none;
  margin-top: 0;
  padding-bottom: 0;
}

/* =====================================================
   BRIEF NAVIGATION
   ===================================================== */

.brief-nav {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

/* =====================================================
   READING PATHS
   ===================================================== */

.reading-paths-page {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.reading-paths-hero {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.reading-paths-hero h1 {
  margin-bottom: var(--space-sm);
}

.reading-paths-hero p {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
}

.reading-path {
  background: var(--color-white);
  border-radius: var(--card-radius);
  padding: var(--space-xl) var(--space-2xl);
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.reading-path__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.reading-path__name {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.reading-path__count {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 600;
}

.reading-path__desc {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.reading-path__steps {
  list-style: none;
  counter-reset: step;
}

.reading-path__step {
  counter-increment: step;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.reading-path__step:last-child {
  border-bottom: none;
}

.reading-path__step:hover {
  background: var(--color-cream);
  margin: 0 calc(-1 * var(--space-md));
  padding-left: var(--space-md);
  padding-right: var(--space-md);
  border-radius: var(--card-radius);
}

.reading-path__step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.reading-path__step a {
  font-weight: 500;
  font-size: var(--font-size-base);
}

.reading-path__start {
  margin-top: var(--space-lg);
}

/* =====================================================
   FOOTER
   ===================================================== */

.footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-xl) 0;
  text-align: center;
  font-size: var(--font-size-sm);
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
}

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

.footer__disclaimer {
  max-width: 700px;
  margin: 0 auto var(--space-md);
  font-size: var(--font-size-xs);
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.4);
}

/* =====================================================
   LOADING STATE
   ===================================================== */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
}

.loading__spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: var(--space-md);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-3xl);
  color: var(--color-text-muted);
}

.empty-state__icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.empty-state__text {
  font-size: var(--font-size-lg);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 1024px) {
  .category-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }

  .container {
    padding: 0 var(--space-md);
  }

  /* Header mobile */
  .header__menu-btn {
    display: block;
  }

  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-xl);
    gap: var(--space-md);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: 99;
  }

  .header__nav--open {
    transform: translateX(0);
  }

  .header__nav-link {
    font-size: var(--font-size-lg);
    padding: var(--space-sm) 0;
  }

  .header__user {
    flex-direction: column;
    align-items: flex-start;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    width: 100%;
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .hero {
    padding: var(--space-xl) 0;
  }

  .hero h1 {
    font-size: var(--font-size-2xl);
  }

  .auth-card {
    padding: var(--space-xl);
  }

  .brief-header__title {
    font-size: var(--font-size-2xl);
  }

  .brief-header__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .breadcrumb {
    font-size: var(--font-size-xs);
  }

  .reading-path {
    padding: var(--space-lg);
  }

  .reading-path__header {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .category-grid {
    grid-template-columns: 1fr;
  }

  .brief-nav {
    flex-direction: column;
  }

  .hero p {
    font-size: var(--font-size-base);
  }
}

/* =====================================================
   UTILITIES
   ===================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* =====================================================
   LANDING PAGE
   ===================================================== */

.landing-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.landing-hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-primary) 100%);
  padding: var(--space-3xl) var(--space-xl) var(--space-2xl);
  color: var(--color-white);
  text-align: center;
}

.landing-hero__logo {
  height: 64px;
  width: auto;
  margin: 0 auto var(--space-lg);
  filter: brightness(0) invert(1);
}

.landing-hero h1 {
  color: var(--color-white);
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-sm);
}

.landing-hero__subtitle {
  font-size: var(--font-size-xl);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: var(--space-md);
  font-weight: 300;
}

.landing-hero__desc {
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

/* Landing Stats */
.landing-stats {
  background: var(--color-white);
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.landing-stats__grid {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
}

.landing-stat {
  text-align: center;
}

.landing-stat__number {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.landing-stat__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Landing Categories */
.landing-categories {
  padding: var(--space-2xl) 0;
}

.landing-categories h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.landing-categories__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: 800px;
  margin: 0 auto;
}

.landing-cat-card {
  background: var(--color-white);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--card-radius);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-navy);
  text-align: center;
  transition: all var(--transition-base);
}

.landing-cat-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.landing-cat-card span {
  display: block;
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

/* Landing Member Access */
.landing-member {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.landing-member__card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--color-white);
  border-radius: var(--card-radius);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  text-align: center;
}

.landing-member__card h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

.landing-member__card > p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
}

.landing-member__form-row {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.landing-member__form-row input {
  flex: 1;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--input-radius);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.landing-member__form-row input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(64, 105, 161, 0.15);
}

.landing-member__note {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  margin-bottom: 0;
}

/* =====================================================
   READING PATHS BANNER (LIBRARY PAGE)
   ===================================================== */

.reading-paths-banner {
  padding: 1rem 0;
}

.reading-paths-banner__inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem 1.75rem;
  background: linear-gradient(135deg, #e8eef6 0%, #f0eee8 100%);
  border: 1px solid #d0d8e4;
  border-radius: 12px;
}

.reading-paths-banner__icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.reading-paths-banner__content {
  flex: 1;
}

.reading-paths-banner__content h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--color-navy);
  margin: 0 0 0.25rem;
}

.reading-paths-banner__content p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.5;
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.88rem;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .reading-paths-banner__inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 1.25rem;
  }
}

/* =====================================================
   PEPTIDE HIGHLIGHT CARD
   ===================================================== */

.landing-cat-card--highlight {
  border: 2px solid var(--color-primary);
  background: rgba(64, 105, 161, 0.05);
  font-weight: 600;
}

/* =====================================================
   READING PATHS SECTION (LANDING)
   ===================================================== */

.landing-paths {
  padding: 4rem 0;
  background: var(--color-bg);
}

.landing-paths h2 {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-navy);
  margin-bottom: 0.5rem;
}

.landing-paths__subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

.landing-paths__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}

.landing-path-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: white;
  border: 1px solid #e0ddd6;
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.15s;
}

.landing-path-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(64, 105, 161, 0.12);
  transform: translateY(-2px);
}

.landing-path-card__number {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-body);
  flex-shrink: 0;
  margin-top: 2px;
}

.landing-path-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-navy);
  margin: 0 0 0.3rem;
}

.landing-path-card p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.5;
}

.landing-paths__cta {
  text-align: center;
  margin-top: 2rem;
}

.btn--outline {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  background: transparent;
  border: 2px solid var(--color-primary);
  border-radius: var(--button-radius);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  cursor: pointer;
}

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

/* =====================================================
   MEMBER ACCESS BUTTON (HEADER)
   ===================================================== */

.header__member-btn {
  font-size: var(--font-size-xs);
  font-weight: 600;
  font-family: var(--font-body);
  color: var(--color-primary);
  background: rgba(64, 105, 161, 0.08);
  border: 1px solid var(--color-primary);
  border-radius: var(--button-radius);
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.header__member-btn:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.header__member-btn--active {
  background: var(--color-primary);
  color: var(--color-white);
}

.header__member-btn--active:hover {
  background: var(--color-error);
  border-color: var(--color-error);
}

/* =====================================================
   ACCESS CODE MODAL
   ===================================================== */

.access-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 200;
  background: rgba(13, 27, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  animation: fadeIn 0.2s ease;
}

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

.access-modal {
  width: 100%;
  max-width: 420px;
  background: var(--color-white);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2xl);
  text-align: center;
  position: relative;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.access-modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1;
  padding: var(--space-xs);
}

.access-modal__close:hover {
  color: var(--color-text);
}

.access-modal__icon {
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.access-modal h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

.access-modal p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

/* =====================================================
   MEMBER-ONLY GATE (BRIEF PAGE)
   ===================================================== */

.member-gate-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  background: var(--color-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.member-gate {
  max-width: 480px;
  text-align: center;
  color: var(--color-navy);
}

.member-gate svg {
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.member-gate h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}

.member-gate p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

.member-gate .form-group input {
  text-align: center;
  font-size: var(--font-size-lg);
  letter-spacing: 0.1em;
  width: 100%;
  padding: 0.875rem 1rem;
  font-family: var(--font-body);
  border: 1px solid var(--color-border);
  border-radius: var(--input-radius);
}

.member-gate .form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(64, 105, 161, 0.15);
}

.member-gate__back {
  display: inline-block;
  margin-top: var(--space-xl);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.member-gate__back:hover {
  color: var(--color-primary);
}

/* =====================================================
   VIDEO SECTION
   ===================================================== */

.video-section {
  margin-bottom: var(--space-xl);
}

.video-embed__title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
  color: var(--color-navy);
}

.video-embed__wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-md);
}

.video-embed__wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-placeholder {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: rgba(64, 105, 161, 0.04);
  border: 1px dashed var(--color-border);
  border-radius: var(--card-radius);
}

.video-placeholder__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  height: 64px;
  background: rgba(64, 105, 161, 0.08);
  border-radius: 50%;
  color: var(--color-primary);
  flex-shrink: 0;
}

.video-placeholder__text strong {
  display: block;
  font-size: var(--font-size-base);
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.video-placeholder__text p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.5;
}

/* =====================================================
   BOOKMARK & SHARE BUTTONS
   ===================================================== */

.brief-header__actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.bookmark-btn,
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--button-radius);
  padding: 0.4rem 0.85rem;
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.bookmark-btn:hover,
.share-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.bookmark-btn--active {
  background: rgba(64, 105, 161, 0.08);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* =====================================================
   BOOKMARKS SECTION (LIBRARY PAGE)
   ===================================================== */

.bookmarks-section {
  padding: var(--space-xl) 0 0;
}

.bookmarks-section__header {
  margin-bottom: var(--space-md);
}

.bookmarks-section__header h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
}

/* =====================================================
   MEMBER-ONLY BRIEF LIST STYLES
   ===================================================== */

.brief-list__item--locked {
  opacity: 0.7;
}

.brief-list__item--locked:hover {
  opacity: 1;
}

.brief-list__lock {
  display: inline-flex;
  align-items: center;
  margin-left: var(--space-sm);
  color: var(--color-text-muted);
  vertical-align: middle;
}

/* =====================================================
   TABLE WRAPPER (responsive)
   ===================================================== */

.table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-lg) 0;
}

.table-wrapper table {
  margin: 0;
  min-width: 500px;
}

/* =====================================================
   LANDING RESPONSIVE
   ===================================================== */

@media (max-width: 768px) {
  .landing-hero {
    padding: var(--space-2xl) var(--space-md);
  }

  .landing-hero h1 {
    font-size: var(--font-size-3xl);
  }

  .landing-hero__subtitle {
    font-size: var(--font-size-lg);
  }

  .landing-stats__grid {
    gap: var(--space-xl);
  }

  .landing-stat__number {
    font-size: var(--font-size-3xl);
  }

  .landing-categories__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }

  .landing-member__card {
    padding: var(--space-xl);
  }

  .landing-member__form-row {
    flex-direction: column;
  }

  .landing-paths__grid {
    grid-template-columns: 1fr;
  }

  .landing-paths h2 {
    font-size: 1.6rem;
  }

  .video-placeholder {
    flex-direction: column;
    text-align: center;
  }

  .brief-header__actions {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .landing-hero h1 {
    font-size: var(--font-size-2xl);
  }

  .landing-stats__grid {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .landing-categories__grid {
    grid-template-columns: 1fr;
  }
}