/* School First landing — Material Design 3 (CSS tokens, no MDC JS bundle) */

:root {
  /* MD3 color roles — seed: School First indigo */
  --md-sys-color-primary: #4f46e5;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #e8e7ff;
  --md-sys-color-on-primary-container: #1a1780;
  --md-sys-color-secondary: #5b5d72;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #e0e1f0;
  --md-sys-color-surface: #fefbff;
  --md-sys-color-surface-dim: #ded8e1;
  --md-sys-color-surface-bright: #fefbff;
  --md-sys-color-surface-container-lowest: #ffffff;
  --md-sys-color-surface-container-low: #f7f2fa;
  --md-sys-color-surface-container: #f1ecf4;
  --md-sys-color-surface-container-high: #ebe6ee;
  --md-sys-color-on-surface: #1c1b1f;
  --md-sys-color-on-surface-variant: #49454f;
  --md-sys-color-outline: #79747e;
  --md-sys-color-outline-variant: #cac4d0;
  --md-sys-color-tertiary: #006874;
  --md-sys-color-tertiary-container: #9eeffd;
  --md-sys-color-error: #ba1a1a;

  /* Role accents */
  --md-role-admin: #6750a4;
  --md-role-teacher: #2563eb;
  --md-role-parent: #0891b2;

  /* Shape */
  --md-shape-xs: 4px;
  --md-shape-sm: 8px;
  --md-shape-md: 12px;
  --md-shape-lg: 16px;
  --md-shape-xl: 28px;
  --md-shape-full: 9999px;

  /* Elevation */
  --md-elevation-1: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-elevation-2: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.3);

  --md-font: 'Roboto', system-ui, sans-serif;
  --md-font-display: 'Roboto Flex', 'Roboto', system-ui, sans-serif;
  --md-max-width: 72rem;
}

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

html { scroll-behavior: smooth; }

body.landing-page {
  font-family: var(--md-font);
  font-size: 1rem;
  line-height: 1.5;
  letter-spacing: 0.009em;
  color: var(--md-sys-color-on-surface);
  background: var(--md-sys-color-surface);
  -webkit-font-smoothing: antialiased;
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  user-select: none;
}

/* ── Typography (MD3 scale) ── */
.md-display {
  font-family: var(--md-font-display);
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.md-display__accent { color: var(--md-sys-color-primary); }
.md-headline {
  font-family: var(--md-font-display);
  font-size: clamp(1.75rem, 3vw, 2rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: 0;
  color: var(--md-sys-color-on-surface);
}
.md-body-large {
  font-size: 1rem;
  line-height: 1.5;
  letter-spacing: 0.031em;
  color: var(--md-sys-color-on-surface-variant);
}
.md-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--md-sys-color-primary);
  margin-bottom: 0.5rem;
}

/* ── Elevation utilities ── */
.md-elevation-1 { box-shadow: var(--md-elevation-1); }
.md-elevation-2 { box-shadow: var(--md-elevation-2); }
.md-elevation-3 { box-shadow: var(--md-elevation-3); }

/* ── Buttons (MD3 filled / outlined / tonal / text / elevated) ── */
.md-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0 1.5rem;
  border-radius: var(--md-shape-full);
  font-family: var(--md-font);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.006em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: box-shadow 0.2s, background 0.2s, transform 0.1s;
  white-space: nowrap;
}
.md-btn:active { transform: scale(0.98); }
.md-btn--lg { min-height: 48px; padding: 0 1.75rem; font-size: 0.9375rem; }
.md-btn--block { width: 100%; }

.md-btn--filled {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-elevation-1);
}
.md-btn--filled:hover {
  box-shadow: var(--md-elevation-2);
  filter: brightness(1.05);
}
.md-btn--outlined {
  background: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}
.md-btn--outlined:hover { background: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent); }
.md-btn--tonal {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-surface);
}
.md-btn--tonal:hover { filter: brightness(0.97); }
.md-btn--text {
  background: transparent;
  color: var(--md-sys-color-primary);
  min-height: 40px;
  padding: 0 0.75rem;
}
.md-btn--text:hover { background: color-mix(in srgb, var(--md-sys-color-primary) 8%, transparent); }
.md-btn--elevated {
  background: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-primary);
  box-shadow: var(--md-elevation-1);
}
.md-btn--elevated:hover { box-shadow: var(--md-elevation-2); }

.md-portal-card--admin .md-btn--filled { background: var(--md-role-admin); }
.md-portal-card--teacher .md-btn--filled { background: var(--md-role-teacher); }
.md-portal-card--parent .md-btn--filled { background: var(--md-role-parent); }

/* ── Chip ── */
.md-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 32px;
  padding: 0 0.75rem;
  border-radius: var(--md-shape-sm);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
}
.md-chip--assist {
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  border: 1px solid var(--md-sys-color-outline-variant);
}
.md-chip__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
}

/* ── Icon tile ── */
.md-icon-tile {
  width: 48px;
  height: 48px;
  border-radius: var(--md-shape-md);
  display: grid;
  place-items: center;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  margin-bottom: 1rem;
}
.md-icon-tile .material-symbols-outlined { font-size: 1.5rem; }
.md-icon-tile--admin { background: #ede9fe; color: #5b21b6; }
.md-icon-tile--violet { background: #ede9fe; color: #6d28d9; }
.md-icon-tile--blue { background: #dbeafe; color: #1d4ed8; }
.md-icon-tile--teacher { background: #dbeafe; color: #1d4ed8; }
.md-icon-tile--teal { background: #cffafe; color: #0e7490; }
.md-icon-tile--parent { background: #cffafe; color: #0e7490; }
.md-icon-tile--amber { background: #fef3c7; color: #b45309; }

/* ── Badge ── */
.md-badge {
  font-size: 0.6875rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: var(--md-shape-sm);
  letter-spacing: 0.04em;
}
.md-badge--success {
  background: #e8f5e9;
  color: #1b5e20;
}

/* ── Cards ── */
.md-card {
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-shape-lg);
  padding: 1.5rem;
  border: 1px solid var(--md-sys-color-outline-variant);
}
.md-card--interactive {
  transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
}
.md-card--interactive:hover {
  box-shadow: var(--md-elevation-2);
  transform: translateY(-2px);
  border-color: transparent;
}
.md-card h3 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  letter-spacing: 0;
}
.md-card p {
  font-size: 0.875rem;
  line-height: 1.43;
  color: var(--md-sys-color-on-surface-variant);
}

/* ── Skip link & progress ── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 0.75rem 1rem;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: 0 0 var(--md-shape-sm) 0;
}
.skip-link:focus { left: 0; }

.landing-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  background: var(--md-sys-color-primary);
  transform-origin: left;
  transform: scaleX(0);
  pointer-events: none;
}

/* ── Top app bar ── */
.landing-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--md-sys-color-surface) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}
.landing-nav__inner {
  max-width: var(--md-max-width);
  margin: 0 auto;
  padding: 0.5rem 1.5rem;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.landing-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--md-sys-color-on-surface);
}
.landing-brand__mark {
  width: 40px;
  height: 40px;
  border-radius: var(--md-shape-md);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: grid;
  place-items: center;
}
.landing-brand__text {
  font-size: 1.375rem;
  font-weight: 500;
  letter-spacing: 0;
}
.landing-nav__links {
  display: none;
  align-items: center;
  gap: 0.25rem;
}
.landing-nav__links a {
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.625rem 1rem;
  border-radius: var(--md-shape-full);
  transition: background 0.2s, color 0.2s;
}
.landing-nav__links a:hover {
  background: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
  color: var(--md-sys-color-on-surface);
}
.landing-nav__links a.is-active {
  color: var(--md-sys-color-primary);
  background: var(--md-sys-color-primary-container);
}
.landing-nav__actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 900px) {
  .landing-nav__links { display: flex; }
}

/* ── Hero ── */
.landing-hero {
  max-width: var(--md-max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4.5rem;
  display: grid;
  gap: 2.5rem;
  align-items: center;
  position: relative;
  background: linear-gradient(180deg, var(--md-sys-color-surface-container-low) 0%, var(--md-sys-color-surface) 100%);
}
@media (min-width: 900px) {
  .landing-hero {
    grid-template-columns: 1fr 1fr;
    padding: 4rem 1.5rem 5rem;
  }
}
.landing-hero__lead { margin-bottom: 1.75rem; max-width: 32rem; }
.landing-hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.landing-hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.md-stat-card {
  background: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-shape-lg);
  padding: 1rem 1.25rem;
  min-width: 5.5rem;
  box-shadow: var(--md-elevation-1);
}
.md-stat-card strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--md-sys-color-primary);
  line-height: 1.1;
  font-family: var(--md-font-display);
}
.md-stat-card span {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
}

.landing-hero__visual {
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-shape-xl);
  padding: 1.25rem;
  border: 1px solid var(--md-sys-color-outline-variant);
}
.landing-mock { display: grid; gap: 0.75rem; }
.landing-mock__row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-shape-lg);
  border: 1px solid transparent;
  transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
}
.landing-mock__row strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
}
.landing-mock__row span:not(.md-icon-tile):not(.md-badge):not(.material-symbols-outlined) {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
}
.landing-mock__row.is-highlighted {
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--md-elevation-2);
  transform: scale(1.01);
  background: var(--md-sys-color-surface-container-lowest);
}
.landing-mock__row .md-badge { margin-left: auto; }

.landing-scroll-hint {
  position: absolute;
  bottom: 0.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  animation: md-bounce 2s ease-in-out infinite;
}
@keyframes md-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* ── Sections ── */
.landing-section {
  max-width: var(--md-max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}
.landing-section--surface {
  background: var(--md-sys-color-surface-container-low);
  max-width: none;
  padding-left: max(1.5rem, calc((100% - var(--md-max-width)) / 2 + 1.5rem));
  padding-right: max(1.5rem, calc((100% - var(--md-max-width)) / 2 + 1.5rem));
}
.landing-section__head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}
.landing-section__head .md-headline { margin-bottom: 0.75rem; }

.landing-features {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  max-width: var(--md-max-width);
  margin: 0 auto;
}
@media (min-width: 600px) { .landing-features { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .landing-features { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; } }

/* ── Steps ── */
.landing-steps {
  display: grid;
  gap: 1.25rem;
  max-width: var(--md-max-width);
  margin: 0 auto;
}
@media (min-width: 768px) { .landing-steps { grid-template-columns: repeat(3, 1fr); } }

.md-step-card {
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-shape-xl);
  padding: 2rem 1.5rem;
  text-align: center;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-elevation-1);
}
.md-step-card__num {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  box-shadow: var(--md-elevation-1);
}
.md-step-card h3 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.md-step-card p {
  font-size: 0.875rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.43;
}

/* ── Role cards ── */
.landing-roles {
  display: grid;
  gap: 1.25rem;
  max-width: var(--md-max-width);
  margin: 0 auto;
}
@media (min-width: 768px) { .landing-roles { grid-template-columns: repeat(3, 1fr); } }

.md-role-card {
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-shape-xl);
  padding: 1.75rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-elevation-1);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s, transform 0.25s;
}
.md-role-card:hover {
  box-shadow: var(--md-elevation-2);
  transform: translateY(-2px);
}
.md-role-card h3 {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}
.md-role-card p {
  font-size: 0.875rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 1.25rem;
  flex: 1;
  line-height: 1.43;
}

/* ── Portal sign-in cards ── */
.landing-portal-grid {
  display: grid;
  gap: 1.25rem;
  max-width: var(--md-max-width);
  margin: 0 auto;
}
@media (min-width: 768px) { .landing-portal-grid { grid-template-columns: repeat(3, 1fr); } }

.md-portal-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  background: var(--md-sys-color-surface-container-lowest);
  border-radius: var(--md-shape-xl);
  padding: 1.75rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  transition: box-shadow 0.25s, transform 0.25s;
}
.md-portal-card:hover {
  box-shadow: var(--md-elevation-3);
  transform: translateY(-4px);
}
.md-portal-card h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.md-portal-card__hint {
  font-size: 0.8125rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 1rem;
}
.md-portal-card__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  flex: 1;
}
.md-portal-card__list li {
  font-size: 0.875rem;
  color: var(--md-sys-color-on-surface-variant);
  padding: 0.35rem 0 0.35rem 1.5rem;
  position: relative;
}
.md-portal-card__list li::before {
  content: 'check';
  font-family: 'Material Symbols Outlined';
  position: absolute;
  left: 0;
  font-size: 1rem;
  color: var(--md-sys-color-primary);
}

/* ── CTA banner ── */
.landing-cta {
  max-width: var(--md-max-width);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}
.md-cta-banner {
  background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, #6366f1 100%);
  border-radius: var(--md-shape-xl);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--md-sys-color-on-primary);
}
.md-cta-banner .md-headline {
  color: var(--md-sys-color-on-primary);
  margin-bottom: 0.75rem;
}
.md-cta-banner p {
  opacity: 0.92;
  margin-bottom: 1.5rem;
  font-size: 1rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

/* ── Footer ── */
.landing-footer {
  background: var(--md-sys-color-surface-container);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  padding: 2rem 1.5rem;
}
.landing-footer__inner {
  max-width: var(--md-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}
.landing-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--md-sys-color-on-surface);
}
.landing-footer__brand .material-symbols-outlined { color: var(--md-sys-color-primary); }
.landing-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}
.landing-footer__links a {
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.25rem 0;
}
.landing-footer__links a:hover { color: var(--md-sys-color-primary); }
.landing-footer__copy {
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
}

@media (min-width: 768px) {
  .landing-footer__inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    text-align: left;
  }
  .landing-footer__links { margin-left: auto; }
}

/* ── Scroll reveal ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s cubic-bezier(0.2, 0, 0, 1), transform 0.5s cubic-bezier(0.2, 0, 0, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal-delay="1"] { transition-delay: 0.06s; }
[data-reveal-delay="2"] { transition-delay: 0.12s; }
[data-reveal-delay="3"] { transition-delay: 0.18s; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .landing-scroll-hint { animation: none; }
}

/* Focus visible (MD3 a11y) */
a:focus-visible,
.md-btn:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}