/* ============================================================
   PolarKnight – arktinen yö / pohjoisen ritari
   ============================================================ */

/* --- Fontit (itse-hostatut, GDPR-ystävällinen) --------------- */
@font-face {
  font-family: 'Fraunces';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/assets/fonts/fraunces.woff2') format('woff2');
}
@font-face {
  font-family: 'Hanken Grotesk';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/assets/fonts/hankengrotesk.woff2') format('woff2');
}

/* --- Tokenit ------------------------------------------------- */
:root {
  --bg:        #080c20;
  --bg-2:      #0c1230;
  --bg-alt:    #0a1029;
  --surface:   rgba(146, 168, 224, 0.06);
  --surface-2: rgba(146, 168, 224, 0.10);
  --ink:       #eaf0ff;
  --ink-dim:   #a3b3d8;
  --ink-mute:  #7e8fb8;
  --line:      rgba(150, 170, 220, 0.16);
  --line-2:    rgba(150, 170, 220, 0.28);
  --gold:      #f0c879;
  --gold-deep: #d9a64c;
  --aurora-1:  #3ae3b0;
  --aurora-2:  #4ea7ff;
  --aurora-3:  #9a78ff;

  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --font-body: 'Hanken Grotesk', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  --wrap: 1140px;
  --radius: 16px;
  --radius-sm: 10px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- Reset --------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }
button { font: inherit; cursor: pointer; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--gold); color: #1a1305; padding: .6rem 1rem; border-radius: 0 0 8px 0; font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--aurora-2); outline-offset: 3px; border-radius: 4px; }

/* --- Eyebrow / section heads -------------------------------- */
.eyebrow {
  text-transform: uppercase;
  letter-spacing: .22em;
  font-size: .74rem;
  font-weight: 700;
  color: var(--aurora-1);
  margin-bottom: 1rem;
}
.section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.section-alt { background: linear-gradient(180deg, var(--bg-alt), var(--bg-2)); border-block: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 3rem; }
.section-head h2 { font-size: clamp(1.9rem, 4vw, 2.7rem); }
.section-head .section-lead, .section-lead { color: var(--ink-dim); margin-top: 1rem; font-size: 1.1rem; }

.grad {
  background: linear-gradient(100deg, var(--aurora-1), var(--aurora-2) 45%, var(--aurora-3));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* --- Buttons ------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .9rem 1.5rem; border-radius: 999px; font-weight: 600;
  border: 1px solid transparent; transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
  will-change: transform;
}
.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: #1c1404;
  box-shadow: 0 10px 30px -10px rgba(240, 200, 121, 0.5);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px rgba(240, 200, 121, 0.65); }
.btn-ghost { border-color: var(--line-2); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { transform: translateY(-2px); background: var(--surface-2); border-color: var(--aurora-2); }
.btn-block { width: 100%; justify-content: center; }

.link-arrow {
  display: inline-flex; align-items: center; gap: .45rem;
  color: var(--gold); font-weight: 600; margin-top: .5rem;
}
.link-arrow span { transition: transform .25s var(--ease); }
.link-arrow:hover span { transform: translateX(5px); }

/* --- Header -------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(8, 12, 32, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(8, 12, 32, 0.9); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: .65rem; }
.brand-mark { filter: drop-shadow(0 2px 8px rgba(78, 167, 255, 0.35)); }
.brand-word { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; }
.brand-word-accent { color: var(--gold); }

.primary-nav { display: flex; align-items: center; gap: 1.9rem; }
.nav-link { color: var(--ink-dim); font-weight: 500; position: relative; padding: .3rem 0; transition: color .2s; }
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--aurora-1), var(--aurora-2)); transition: width .25s var(--ease);
}
.nav-link:hover, .nav-link.is-active { color: var(--ink); }
.nav-link.is-active::after, .nav-link:hover::after { width: 100%; }
.nav-cta {
  padding: .55rem 1.15rem; border-radius: 999px; font-weight: 600;
  background: var(--surface-2); border: 1px solid var(--line-2); color: var(--ink); transition: all .25s;
}
.nav-cta:hover, .nav-cta.is-active { border-color: var(--gold); color: var(--gold); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: .5rem; }
.nav-toggle span { display: block; width: 26px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .3s, opacity .3s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero ---------------------------------------------------- */
.hero { position: relative; padding: clamp(4.5rem, 12vw, 9rem) 0 clamp(4rem, 9vw, 7rem); overflow: hidden; }
.hero-sky { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.aurora {
  position: absolute; inset: -30% -10% auto -10%; height: 90%;
  background:
    radial-gradient(60% 55% at 25% 20%, rgba(58, 227, 176, 0.30), transparent 60%),
    radial-gradient(55% 50% at 70% 15%, rgba(154, 120, 255, 0.28), transparent 60%),
    radial-gradient(50% 60% at 50% 0%, rgba(78, 167, 255, 0.22), transparent 65%),
    radial-gradient(42% 45% at 88% 38%, rgba(58, 227, 176, 0.16), transparent 62%);
  filter: blur(40px); opacity: .9;
  animation: aurora-drift 16s ease-in-out infinite alternate;
}
.aurora-soft { opacity: .62; height: 80%; }
@keyframes aurora-drift {
  0%   { transform: translateX(-4%) translateY(0) scale(1); }
  50%  { transform: translateX(4%) translateY(2%) scale(1.06); }
  100% { transform: translateX(-2%) translateY(-2%) scale(1.02); }
}
.stars {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%, rgba(255,255,255,.7), transparent),
    radial-gradient(1.5px 1.5px at 75% 20%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 50% 60%, rgba(255,255,255,.6), transparent),
    radial-gradient(1px 1px at 85% 70%, rgba(255,255,255,.4), transparent),
    radial-gradient(1.5px 1.5px at 10% 75%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 35% 15%, rgba(255,255,255,.5), transparent);
  opacity: .5;
}
/* Tähdet sisäsivujen heroihin (etusivulla on oma .stars-kerros) */
.page-hero .hero-sky::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(1.5px 1.5px at 15% 22%, rgba(255,255,255,.7), transparent),
    radial-gradient(1px 1px at 62% 26%, rgba(255,255,255,.5), transparent),
    radial-gradient(1.2px 1.2px at 82% 16%, rgba(255,255,255,.55), transparent),
    radial-gradient(1px 1px at 38% 12%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 90% 42%, rgba(255,255,255,.4), transparent),
    radial-gradient(1.4px 1.4px at 26% 40%, rgba(255,255,255,.45), transparent);
  opacity: .6;
}
/* Lumesta heijastuva hehku heron alareunaan (kaikki herot) */
.hero-sky::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 55%;
  background: radial-gradient(120% 90% at 50% 130%, rgba(180, 214, 255, 0.18), rgba(180, 214, 255, 0.05) 42%, transparent 72%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; }
.hero-title { font-size: clamp(2.6rem, 7vw, 4.6rem); font-weight: 600; }
.hero-lead { font-size: clamp(1.1rem, 2.2vw, 1.32rem); color: var(--ink-dim); margin-top: 1.5rem; max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.2rem; }
.hero-badges { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 3rem; }
.badge {
  font-size: .85rem; color: var(--ink-dim); padding: .5rem .9rem; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line);
}
.badge strong { color: var(--ink); font-weight: 600; }
.hero-knight {
  position: absolute; right: -2%; bottom: -8%; z-index: 1;
  font-family: 'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols2', 'DejaVu Sans', serif;
  font-size: clamp(16rem, 34vw, 34rem); line-height: 1; color: rgba(146, 168, 224, 0.06);
  pointer-events: none; user-select: none;
}

/* --- Page hero (sisäsivut) ---------------------------------- */
.page-hero { position: relative; overflow: hidden; padding: clamp(3.5rem, 9vw, 6rem) 0 clamp(2rem, 5vw, 3.5rem); }
.page-hero h1 { font-size: clamp(2.2rem, 5.5vw, 3.6rem); position: relative; z-index: 2; }
.page-lead { position: relative; z-index: 2; color: var(--ink-dim); font-size: 1.15rem; margin-top: 1.2rem; max-width: 640px; }
/* Sisäsivujen hieno taustamotiivi: himmeä shakkinappula, sivukohtainen glyfi */
.page-hero::after {
  content: '\265E'; /* ratsu (oletus) */
  position: absolute; right: -1%; bottom: -16%; z-index: 1;
  font-family: 'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols2', 'DejaVu Sans', serif;
  font-size: clamp(10rem, 26vw, 22rem); line-height: 1;
  color: rgba(146, 168, 224, 0.05);
  pointer-events: none; user-select: none;
}
body[data-page="kouluille"]    .page-hero::after { content: '\265C'; } /* torni ♜ */
body[data-page="opettaja"]     .page-hero::after { content: '\265B'; } /* kuningatar ♛ */
body[data-page="yhteydenotto"] .page-hero::after { content: '\265F'; } /* sotilas ♟ */

/* --- Cards / grids ------------------------------------------ */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; transition: transform .3s var(--ease), border-color .3s, background .3s;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-2); background: var(--surface-2); }
.card-icon {
  display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 12px;
  font-size: 1.6rem; margin-bottom: 1rem;
  background: linear-gradient(135deg, rgba(58,227,176,.16), rgba(154,120,255,.16));
  color: var(--ink);
}
.card h3 { font-size: 1.25rem; margin-bottom: .5rem; }
.card p { color: var(--ink-dim); font-size: .98rem; }

/* --- Split -------------------------------------------------- */
.split { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.split-text h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); margin-bottom: 1.1rem; }
.split-text p { color: var(--ink-dim); margin-bottom: 1rem; }
.split-list { display: grid; gap: .8rem; }
.split-list li {
  display: flex; align-items: center; gap: .8rem; padding: 1rem 1.2rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); font-weight: 500;
}
.split-list li span { color: var(--gold); font-size: 1.2rem; }

/* --- Steps -------------------------------------------------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; counter-reset: step; }
.step { position: relative; padding: 2rem 1.5rem 1.5rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.step-num {
  position: absolute; top: -22px; left: 1.5rem; width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; font-family: var(--font-display); font-size: 1.4rem; font-weight: 600;
  color: #1c1404; background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  box-shadow: 0 8px 20px -8px rgba(240,200,121,.6);
}
.step h3 { font-size: 1.3rem; margin-bottom: .5rem; }
.step p { color: var(--ink-dim); font-size: .98rem; }

/* --- Facts -------------------------------------------------- */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.fact { padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.fact-k { display: block; color: var(--aurora-1); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; margin-bottom: .5rem; }
.fact-v { color: var(--ink); font-weight: 500; }

/* --- Teacher teaser ----------------------------------------- */
.teacher-teaser {
  display: grid; grid-template-columns: 1.4fr .6fr; gap: 2rem; align-items: center;
  background: linear-gradient(135deg, rgba(78,167,255,.08), rgba(154,120,255,.08));
  border: 1px solid var(--line); border-radius: 24px; padding: clamp(1.8rem, 4vw, 3rem);
}
.teacher-teaser h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin-bottom: 1rem; }
.teacher-teaser p { color: var(--ink-dim); margin-bottom: 1rem; }
.teacher-teaser-medal { display: grid; place-items: center; }
.medal {
  font-size: 6rem; width: 140px; height: 140px; display: grid; place-items: center; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(240,200,121,.4), rgba(240,200,121,.06));
  border: 1px solid rgba(240,200,121,.3); color: var(--gold);
}

/* --- Profile card (opettaja) -------------------------------- */
.profile-card { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 2rem; text-align: center; }
.profile-medal {
  font-size: 3rem; width: 90px; height: 90px; margin: 0 auto 1rem; display: grid; place-items: center; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(240,200,121,.4), rgba(240,200,121,.05));
  border: 1px solid rgba(240,200,121,.3); color: var(--gold);
}
.profile-name { font-size: 1.5rem; }
.profile-role { color: var(--gold); font-weight: 600; margin-bottom: 1.5rem; }
.profile-facts { text-align: left; display: grid; gap: .9rem; }
.profile-facts li { border-top: 1px solid var(--line); padding-top: .9rem; }
.profile-facts li span { display: block; color: var(--ink-mute); font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; margin-bottom: .15rem; }

/* --- CTA band ----------------------------------------------- */
.cta-band { position: relative; overflow: hidden; padding: clamp(3.5rem, 8vw, 6rem) 0; text-align: center;
  background: linear-gradient(180deg, var(--bg-2), var(--bg)); border-top: 1px solid var(--line); }
.cta-inner { max-width: 620px; margin-inline: auto; }
.cta-inner h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin-bottom: .8rem; }
.cta-inner p { color: var(--ink-dim); margin-bottom: 1.8rem; font-size: 1.1rem; }

/* --- Contact ------------------------------------------------ */
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.contact-aside h2 { font-size: 1.5rem; margin-bottom: 1.3rem; }
.contact-channels { display: grid; gap: 1.2rem; margin-bottom: 1.5rem; }
.contact-channels li { display: grid; gap: .2rem; }
.ch-label { color: var(--aurora-1); font-size: .76rem; text-transform: uppercase; letter-spacing: .12em; font-weight: 700; }
.contact-channels a { font-size: 1.15rem; font-weight: 500; }
.contact-channels a:hover { color: var(--gold); }
.contact-note { color: var(--ink-dim); font-size: .95rem; }

.contact-form-wrap { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: clamp(1.5rem, 4vw, 2.5rem); }
.field { margin-bottom: 1.1rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: .45rem; }
.field .req { color: var(--gold); }
.field input, .field textarea {
  width: 100%; padding: .8rem 1rem; border-radius: var(--radius-sm);
  background: rgba(4, 7, 22, 0.6); border: 1px solid var(--line-2); color: var(--ink);
  font: inherit; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--aurora-2); box-shadow: 0 0 0 3px rgba(78,167,255,.18); }
.field textarea { resize: vertical; }
.field-error { display: block; color: #ff9a8a; font-size: .85rem; margin-top: .35rem; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-fineprint { color: var(--ink-mute); font-size: .82rem; margin-top: 1rem; text-align: center; }

.alert { border-radius: var(--radius-sm); padding: 1.1rem 1.3rem; margin-bottom: 1.2rem; }
.alert-success { background: rgba(58,227,176,.1); border: 1px solid rgba(58,227,176,.4); }
.alert-success strong { color: var(--aurora-1); }
.alert-success p { color: var(--ink-dim); margin-top: .3rem; }
.alert-error { background: rgba(255,120,100,.1); border: 1px solid rgba(255,120,100,.4); color: #ffb0a3; }

/* --- Footer ------------------------------------------------- */
.aurora-divider { height: 2px; background: linear-gradient(90deg, transparent, var(--aurora-1), var(--aurora-2), var(--aurora-3), transparent); opacity: .6; }
.site-footer { background: var(--bg); padding-top: 3rem; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 2rem; padding: 2.5rem 0; }
.footer-tagline { color: var(--ink-dim); margin-top: .6rem; max-width: 320px; }
.footer-title { font-family: var(--font-body); font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-mute); margin-bottom: 1rem; font-weight: 700; }
.footer-list { display: grid; gap: .6rem; }
.footer-list a { color: var(--ink-dim); transition: color .2s; }
.footer-list a:hover { color: var(--gold); }
.footer-muted { color: var(--ink-mute); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 1.4rem 0; border-top: 1px solid var(--line); color: var(--ink-mute); font-size: .9rem; }
.footer-knight { font-size: 1.4rem; color: var(--gold); opacity: .7; }

/* --- Reveal-animaatio --------------------------------------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* --- Responsive --------------------------------------------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 2.2rem; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .split, .teacher-teaser, .contact-grid { grid-template-columns: 1fr; }
  .teacher-teaser-medal { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    position: fixed; inset: 72px 0 auto 0; flex-direction: column; align-items: stretch; gap: .25rem;
    background: rgba(8,12,32,.97); backdrop-filter: blur(14px); padding: 1rem 1.25rem 1.5rem;
    border-bottom: 1px solid var(--line); transform: translateY(-130%); transition: transform .35s var(--ease); z-index: 40;
  }
  .primary-nav.open { transform: translateY(0); }
  .nav-link, .nav-cta { padding: .85rem .5rem; }
  .nav-cta { text-align: center; margin-top: .5rem; }
}
@media (max-width: 560px) {
  .grid-4, .grid-3, .facts, .field-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  body { font-size: 1rem; }
}

/* --- Reduced motion ----------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
  .aurora { animation: none; }
}