.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background: rgba(246, 244, 239, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(23, 23, 23, 0.06);
}

.site-header.scrolled {
  box-shadow: 0 14px 40px rgba(26, 24, 20, 0.08);
}

.header-inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: var(--font-bold);
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.site-logo span {
  color: var(--retro-blue);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.nav-link,
.drawer-link {
  display: inline-flex;
  align-items: center;
  padding: 11px 16px;
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
}

.nav-link:hover,
.drawer-link:hover {
  background: rgba(255,255,255,0.72);
  color: var(--text-primary);
}

.nav-link.active,
.drawer-link.active {
  background: #ffffff;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.header-progress,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: var(--space-3);
}

.progress-pill {
  display: inline-flex;
  align-items: center;
  padding: 11px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.7);
  border: var(--border-card);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.week-dots {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.week-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(23, 23, 23, 0.13);
}

.week-dot--done {
  background: var(--retro-green);
}

.week-dot--partial {
  background: var(--retro-blue);
}

.hamburger,
.drawer-close {
  display: none;
  background: #fff;
  border: var(--border-card);
  border-radius: 999px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.hamburger {
  flex-direction: column;
  gap: 4px;
}

.hamburger span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--text-primary);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.mobile-drawer {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  width: 100%;
  max-width: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  background: #f6f4ef;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  transform: translateX(100%);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: var(--z-overlay);
}

.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
}

.mobile-drawer nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 0;
}

.mobile-drawer > .nav-link,
.mobile-drawer > .drawer-link {
  display: flex;
}

.drawer-link,
.mobile-drawer > .nav-link,
.mobile-drawer nav .nav-link {
  width: 100%;
  justify-content: space-between;
  background: var(--bg-surface-muted);
}

.drawer-overlay {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: rgba(35, 31, 24, 0.08);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
  z-index: calc(var(--z-overlay) - 1);
}

.drawer-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.page-hero,
.week-hero {
  padding: clamp(42px, 8vw, 88px) 0 clamp(28px, 5vw, 56px);
}

.page-hero .container,
.week-hero .container {
  position: relative;
}

.page-hero::after,
.week-hero::after {
  content: "";
  position: absolute;
  right: 4vw;
  top: 118px;
  width: min(340px, 32vw);
  aspect-ratio: 0.82;
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.12) 100%),
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.7), transparent 32%),
    var(--gradient-blue);
  box-shadow: var(--shadow-card);
  opacity: 0.9;
  z-index: 0;
}

.page-hero::before,
.week-hero::before {
  content: "";
  position: absolute;
  right: calc(4vw + 120px);
  top: 86px;
  width: min(180px, 18vw);
  aspect-ratio: 0.82;
  border-radius: 28px;
  background: var(--gradient-week2, var(--gradient-green));
  box-shadow: var(--shadow-md);
  opacity: 0.85;
  z-index: 0;
}

.page-hero > .container > *,
.week-hero > .container > * {
  position: relative;
  z-index: 1;
}

.page-hero-eyebrow,
.week-hero-eyebrow,
.week-hero-label {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  margin-bottom: var(--space-5);
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.82);
  border: var(--border-card);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
}

.page-hero-title,
.week-hero-title {
  max-width: 760px;
  margin-bottom: var(--space-4);
}

.page-hero-subtitle,
.week-hero-goal {
  max-width: 690px;
  font-size: clamp(1.05rem, 1.3vw, 1.25rem);
  line-height: 1.75;
  color: var(--text-secondary);
}

.hero-stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-8) 0 var(--space-6);
}

.hero-stat {
  min-width: 128px;
  padding: 20px 24px;
  border-radius: 24px;
  background: rgba(255,255,255,0.78);
  border: var(--border-card);
  box-shadow: var(--shadow-sm);
}

.hero-stat-val {
  display: block;
  font-size: 2rem;
  font-weight: var(--font-bold);
  line-height: 1;
  color: var(--text-primary);
}

.hero-stat-label {
  display: block;
  margin-top: 8px;
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.hero-stat-sep,
.hero-gradient-line {
  display: none;
}

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

.section-header {
  margin-bottom: var(--space-8);
}

.section-title {
  max-width: 700px;
}

.section-subtitle {
  max-width: 620px;
  margin-top: var(--space-3);
  color: var(--text-secondary);
}

.week-progress-dots,
.week-progress-bar {
  margin-top: var(--space-8);
}

.week-progress-dots {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: var(--space-3);
  max-width: 780px;
}

.week-dot-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.wdot,
.wpb-day {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--text-primary);
  background: rgba(255,255,255,0.8);
  border: var(--border-card);
  box-shadow: var(--shadow-sm);
}

.wdot--integration {
  background: var(--gradient-gold);
}

.wdot-label {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.week-progress-bar {
  max-width: 860px;
}

.wpb-track {
  height: 12px;
  border-radius: 999px;
  background: rgba(23, 23, 23, 0.08);
  overflow: hidden;
}

.wpb-fill {
  height: 100%;
  background: var(--gradient-button);
  border-radius: inherit;
}

.wpb-days {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--space-4);
}

.wpb-day {
  border: 0;
  cursor: pointer;
}

.site-main,
.week-main,
.assignments-main,
.references-main {
  padding-bottom: var(--space-20);
}

.site-footer {
  padding: var(--space-12) 0 var(--space-16);
}

.footer-inner {
  padding: 32px;
  background: rgba(255,255,255,0.82);
  border: var(--border-card);
  border-radius: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.footer-nav a,
.footer-credit,
.footer-tagline {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--text-primary);
}

@media (max-width: 1024px) {
  .site-nav,
  .header-progress,
  .header-right .progress-pill,
  .header-right .week-dots {
    display: none;
  }

  .header-inner {
    justify-content: space-between;
  }

  .header-right,
  .header-progress {
    margin-left: 0;
  }

  .hamburger,
  .drawer-close {
    display: inline-flex;
  }

  .mobile-drawer {
    display: flex;
    z-index: var(--z-overlay);
  }

  .mobile-drawer.open {
    opacity: 1;
  }

  .mobile-drawer nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 0;
  }

  .mobile-drawer > .nav-link,
  .mobile-drawer > .drawer-link,
  .mobile-drawer nav .nav-link,
  .mobile-drawer nav .drawer-link {
    display: flex;
    width: 100%;
    min-height: 52px;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-radius: 18px;
    background: var(--bg-surface-muted);
  }

  .drawer-close {
    display: none;
  }

  .drawer-overlay {
    inset: var(--header-height) 0 0 0;
  }

  .page-hero::before,
  .page-hero::after,
  .week-hero::before,
  .week-hero::after {
    display: none;
  }

  .week-progress-dots {
    grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 68px;
  }

  .site-header {
    height: 68px;
  }

  .header-inner {
    padding: 0 var(--space-4);
    gap: 12px;
    justify-content: space-between;
  }

  .site-logo {
    font-size: 1rem;
    line-height: 1;
  }

  .header-right,
  .header-progress {
    margin-left: auto;
    gap: 0;
  }

  .hamburger {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;
  }

  .hamburger span {
    width: 16px;
  }

  .page-hero,
  .week-hero {
    padding-top: 32px;
  }

  .hero-stat {
    min-width: 100%;
  }

  .mobile-drawer {
    inset: 68px 0 0 0;
    padding: 12px 16px 24px;
  }

  .drawer-overlay {
    inset: 68px 0 0 0;
  }

  .week-progress-dots {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 6px;
    max-width: none;
    scrollbar-width: none;
  }

  .wdot,
  .wpb-day {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    flex: 0 0 auto;
  }

  .week-dot-item {
    min-width: 56px;
  }

  .wpb-days {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
  }

  .footer-inner {
    padding: 24px;
  }

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

@media (min-width: 1025px) {
  .mobile-drawer,
  .drawer-overlay {
    display: none !important;
  }
}