/* Final production polish: accessibility, responsive behavior and motion */
:root {
  --primary-deep: #183fae;
  --primary-soft: #e8efff;
  --focus: #f59e0b;
  --shadow-soft: 0 12px 34px rgba(31, 53, 100, .10);
  --shadow-lift: 0 24px 58px rgba(31, 53, 100, .18);
  color-scheme: light;
}

body.dark {
  --primary-deep: #a9beff;
  --primary-soft: #1b2c4d;
  --focus: #fbbf24;
  --shadow-soft: 0 14px 38px rgba(0, 0, 0, .22);
  --shadow-lift: 0 26px 60px rgba(0, 0, 0, .36);
  color-scheme: dark;
}

html {
  scrollbar-gutter: stable;
  scroll-padding-top: 112px;
}

body {
  min-width: 320px;
  background-image:
    radial-gradient(circle at 8% 5%, color-mix(in srgb, var(--primary) 7%, transparent), transparent 26rem),
    radial-gradient(circle at 94% 38%, color-mix(in srgb, var(--purple) 6%, transparent), transparent 30rem);
  background-attachment: fixed;
}

::selection {
  background: color-mix(in srgb, var(--primary) 28%, transparent);
  color: var(--ink);
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  right: 16px;
  padding: 9px 15px;
  border-radius: 10px;
  background: var(--ink);
  color: var(--surface);
  transform: translateY(-160%);
  transition: transform .2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:where(a, button, [tabindex]):focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

:where(a, button) {
  -webkit-tap-highlight-color: transparent;
}

section[id], footer[id] {
  scroll-margin-top: 110px;
}

header {
  transition: box-shadow .25s ease, background-color .25s ease, border-color .25s ease;
}

header.is-scrolled {
  box-shadow: 0 10px 30px rgba(18, 32, 58, .09);
}

body.dark header.is-scrolled {
  box-shadow: 0 12px 34px rgba(0, 0, 0, .28);
}

nav a {
  position: relative;
  padding-block: 8px;
  transition: color .2s ease;
}

nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 1px;
  width: 100%;
  height: 2px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--purple));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .25s ease;
}

nav a:hover::after,
nav a:focus-visible::after {
  transform: scaleX(1);
}

.actions button,
.slider-buttons button,
.back {
  min-width: 44px;
  min-height: 44px;
  transition: transform .2s ease, color .2s ease, background-color .2s ease, box-shadow .2s ease;
}

.actions button:hover,
.slider-buttons button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(35, 85, 217, .16);
}

.btn,
.store-btn,
.social-btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn::before,
.store-btn::before,
.social-btn::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(110deg, transparent 28%, rgba(255,255,255,.2) 48%, transparent 68%);
  transform: translateX(110%);
  transition: transform .55s ease;
}

.btn:hover::before,
.store-btn:hover::before,
.social-btn:hover::before {
  transform: translateX(-110%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .36;
  background-image: radial-gradient(color-mix(in srgb, var(--primary) 18%, transparent) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

.hero-copy,
.hero-art {
  position: relative;
  z-index: 1;
}

.stats > div {
  min-width: 104px;
  padding: 13px 15px;
  border: 1px solid color-mix(in srgb, var(--primary) 11%, var(--line));
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  box-shadow: 0 10px 26px rgba(35, 85, 217, .07);
  backdrop-filter: blur(8px);
}

.hero-image {
  border: 1px solid color-mix(in srgb, var(--primary) 16%, var(--line));
  transition: transform .5s cubic-bezier(.2,.8,.2,1), box-shadow .5s ease;
}

.hero-art:hover .hero-image {
  transform: rotate(0) scale(1.012);
  box-shadow: var(--shadow-lift);
}

.count-box {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.count-box::after {
  content: "";
  position: absolute;
  z-index: -1;
  width: 260px;
  height: 260px;
  left: -80px;
  bottom: -180px;
  border-radius: 50%;
  border: 45px solid rgba(255,255,255,.08);
}

.timer span {
  padding: 9px 6px;
  border-radius: 14px;
  background: rgba(255,255,255,.09);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.12);
}

.slider {
  border: 1px solid color-mix(in srgb, var(--primary) 12%, var(--line));
}

.slide {
  pointer-events: none;
  transform: scale(1.018);
  transition: opacity .65s ease, transform 1.1s ease;
}

.slide.active {
  pointer-events: auto;
  transform: scale(1);
}

.dots button {
  min-width: 32px;
  min-height: 20px;
  padding: 0;
  background-clip: content-box;
}

.facility-card,
.staff-card,
.teacher-card,
.app-box,
.social-box {
  border-color: color-mix(in srgb, var(--primary) 12%, var(--line));
  box-shadow: var(--shadow-soft);
}

.facility-card,
.staff-card,
.teacher-card {
  height: 100%;
  aspect-ratio: auto;
}

.facility-card:hover,
.staff-card:hover,
.teacher-card:hover {
  border-color: color-mix(in srgb, var(--primary) 34%, var(--line));
  box-shadow: var(--shadow-lift);
}

.staff-photo,
.teacher-photo {
  background:
    radial-gradient(circle at 50% 24%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 46%),
    linear-gradient(145deg, var(--primary-soft), var(--surface));
}

.staff-person-photo,
.teacher-person-photo {
  transition: transform .45s cubic-bezier(.2,.8,.2,1), filter .35s ease;
}

.staff-card:hover .staff-person-photo,
.teacher-card:hover .teacher-person-photo {
  transform: scale(1.025);
  filter: saturate(1.03) contrast(1.015);
}

.teacher-photo > span:not([class]),
.teacher-placeholder-mark {
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  border: 1px solid color-mix(in srgb, var(--primary) 24%, var(--line));
  border-radius: 22px;
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  color: var(--primary);
  font-size: 1.3rem;
  box-shadow: 0 12px 28px rgba(35, 85, 217, .12);
}

.teacher-card-body {
  padding-bottom: 4px;
}

.teacher-hero h1 {
  letter-spacing: -.6px;
}

.teacher-hero-meta span {
  box-shadow: 0 6px 16px rgba(35, 85, 217, .07);
}

.grade::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,.16) 50%, transparent 70%);
  transform: translateX(105%);
  transition: transform .6s ease;
}

.grade:hover::after {
  transform: translateX(-105%);
}

.grade > * {
  z-index: 1;
}

.grade.is-coming-soon {
  cursor: default;
  filter: saturate(.62);
}

.grade.is-coming-soon:hover {
  transform: none;
  filter: saturate(.62);
  box-shadow: none;
}

.grade.is-coming-soon::after {
  display: none;
}

.grade.is-coming-soon b {
  width: fit-content;
  padding: 5px 13px;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 999px;
  background: rgba(255,255,255,.14);
  color: #fff;
}

.achievement-list > div {
  border-radius: 14px;
  transition: padding-inline .25s ease, background-color .25s ease;
}

.achievement-list > div:hover {
  padding-inline: 12px;
  background: color-mix(in srgb, var(--primary) 6%, transparent);
}

footer {
  background-image: linear-gradient(180deg, transparent, color-mix(in srgb, var(--primary) 3%, transparent));
}

footer a {
  width: fit-content;
  transition: color .2s ease, transform .2s ease;
}

footer a:hover {
  transform: translateX(-3px);
}

.back {
  z-index: 50;
  box-shadow: 0 10px 24px rgba(35, 85, 217, .28);
}

.back.show:hover {
  transform: translateY(-3px);
}

/* Content is visible without JavaScript; JS adds this class before observing. */
.reveal {
  opacity: 1;
  transform: none;
}

.reveal.reveal-pending {
  opacity: 0;
  transform: translateY(24px) scale(.985);
}

.reveal.show {
  opacity: 1;
  transform: none;
}

@media (hover: none) {
  .hero-art:hover .hero-image,
  .facility-card:hover,
  .staff-card:hover,
  .teacher-card:hover,
  .grade:hover,
  .store-btn:hover,
  .social-btn:hover {
    transform: none !important;
  }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 92px; }
  section[id], footer[id] { scroll-margin-top: 92px; }
  .mobile.open {
    box-shadow: 0 18px 30px rgba(18, 32, 58, .09);
  }
  .mobile a {
    min-height: 44px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  }
}

@media (max-width: 560px) {
  body { background-attachment: scroll; }
  header .nav { position: relative; }
  header .actions:has(#menu) { display: contents; }
  header .actions:has(#menu) #theme,
  header .actions:has(#menu) #menu {
    position: absolute;
    top: 50%;
    z-index: 2;
    translate: -50% -50%;
  }
  header .actions:has(#menu) #theme { left: calc(50% - 24px); }
  header .actions:has(#menu) #menu { left: calc(50% + 24px); }
  header .actions:has(#menu) .btn.mini {
    position: absolute;
    top: 50%;
    left: 0;
    z-index: 2;
    max-width: 108px;
    padding: 7px 9px;
    translate: 0 -50%;
  }
  .stats { gap: 7px; }
  .stats > div {
    min-width: 0;
    flex: 1;
    padding: 10px 7px;
    text-align: center;
  }
  .actions button,
  .slider-buttons button { width: 44px; height: 44px; }
  .teacher-grid { align-items: stretch; }
  .teacher-photo { width: 88%; }
  .teacher-card { min-height: 0; }
  .teacher-card-body { padding-bottom: 3px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
  .reveal,
  .reveal.reveal-pending { opacity: 1; transform: none; }
}

@media print {
  header, .progress, .back, .slider-buttons, .dots { display: none !important; }
  body { background: #fff; color: #111; }
  .section { padding: 32px 0; }
  .reveal { opacity: 1 !important; transform: none !important; }
  a { text-decoration: underline; }
}