:root {
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  /* Paleta tomada del logo */
  --navy: #0b1f57;
  --sky: #009cde;
  --sun: #ebc623;
  --earth: #7a3f1d;
  /* Tokens de tema */
  --paper: #f5f8fb;
  --paper-2: #e7eef5;
  --ink: #0d1733;
  --ink-soft: #46506b;
  --line: #ccd6e2;
  --brand: #0b1f57;
  --on-brand: #ffffff;
  --link-hover: #009cde;
  --display: "Archivo", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --body: "Public Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --hangul: "Noto Sans KR", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0a1230; --paper-2: #101a40; --ink: #eef2fa; --ink-soft: #a7b1cc;
    --line: #22305e; --brand: #6cc4ee; --on-brand: #0a1230;
  }
}
:root[data-theme="dark"] {
  --paper: #0a1230; --paper-2: #101a40; --ink: #eef2fa; --ink-soft: #a7b1cc;
  --line: #22305e; --brand: #6cc4ee; --on-brand: #0a1230;
}
html { scroll-padding-top: calc(env(safe-area-inset-top, 0px) + 68px); scroll-behavior: smooth; }
*, *::before, *::after { box-sizing: inherit; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body); font-size: 1.0625rem; line-height: 1.6; }
img, svg { max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; }
.wrap { width: min(1080px, 100% - 2.5rem); margin-inline: auto; }

/* Encabezado */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; background: var(--paper); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 60px; flex-wrap: nowrap; padding-block: .4rem; }
.brand { display: flex; align-items: center; gap: .65rem; font-family: var(--display); font-weight: 800; font-stretch: 90%; text-decoration: none; min-width: 0; }
.brand img { width: 40px; height: 40px; flex: none; }
.top nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.top nav a { text-decoration: none; font-weight: 500; font-size: .95rem; color: var(--ink-soft); }
.top nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

/* Hamburguesa */
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 44px; height: 44px; padding: 8px; background: none; border: none; cursor: pointer; color: var(--ink); flex: none; }
.nav-toggle span { display: block; width: 100%; height: 2px; background: currentColor; border-radius: 2px; transition: transform .22s, opacity .18s; }
.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); }

@media (max-width: 719px) {
  .nav-toggle { display: flex; }
  #main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: var(--paper); border-bottom: 3px solid var(--sky); box-shadow: 0 8px 24px rgba(11,31,87,.13); padding: .25rem 0 .75rem; z-index: 9; }
  #main-nav.open { display: flex; }
  .top nav a { padding: .85rem 1.5rem; font-size: 1.05rem; color: var(--ink); border-bottom: 1px solid var(--line); }
  .top nav a:last-child { border-bottom: none; }
}

/* Portada (siempre sobre azul marino, como el aro del logo) */
.hero { position: relative; overflow: hidden; background: var(--paper-2); color: var(--ink); padding: clamp(3rem, 8vw, 6rem) 0; }
.hero .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr; gap: 2.5rem; align-items: center; }
@media (min-width: 860px) { .hero .wrap { grid-template-columns: 1.25fr 1fr; gap: 3rem; } }
.hero h1 { font-family: var(--display); font-weight: 900; font-stretch: 75%; font-size: clamp(2.8rem, 9vw, 6.5rem); line-height: .93; letter-spacing: -.01em; margin: 0; color: var(--brand); }
.hero p.lead { max-width: 46ch; font-size: 1.2rem; color: var(--ink-soft); margin: 1.5rem 0 2rem; }
.stage { position: relative; justify-self: center; --w: min(360px, 76vw); width: var(--w); }
.hero .logo { position: relative; z-index: 1; display: block; width: 100%; height: auto; background: #fff; border-radius: 50%; padding: 12px; box-shadow: 0 14px 36px rgba(11,31,87,.22); }
.hangul { position: absolute; z-index: 0; top: 50%; right: calc(var(--w) * -.22); transform: translateY(-50%); font-family: var(--hangul); font-weight: 900; font-size: calc(var(--w) * .5); line-height: .95; text-align: center; color: #2a2d33; opacity: .14; user-select: none; pointer-events: none; }
.hangul span { display: block; }
.btns { display: flex; gap: .75rem; flex-wrap: wrap; }
.btn { display: inline-block; padding: .8rem 1.4rem; font-weight: 600; text-decoration: none; border: 2px solid var(--brand); border-radius: 2px; }
.btn.solid { background: var(--brand); color: var(--on-brand); }
.btn.solid:hover { background: var(--sky); border-color: var(--sky); color: #fff; }
.btn.ghost { color: var(--brand); }
.btn.ghost:hover { background: var(--paper); }
/* Franja celeste + amarilla bajo la portada */
.stripe { height: 14px; background: linear-gradient(90deg, var(--sky) 0 82%, var(--sun) 82% 100%); }

section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
h2 { font-family: var(--display); font-weight: 800; font-stretch: 80%; font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1; margin: 0 0 1.5rem; color: var(--brand); }
h3 { font-family: var(--display); font-weight: 700; font-stretch: 90%; font-size: 1.3rem; margin: 0 0 .4rem; }
.prose { max-width: 62ch; }
.prose p { margin: 0 0 1rem; }
.split { display: grid; grid-template-columns: 1fr; gap: 2.5rem; }
@media (min-width: 820px) { .split { grid-template-columns: 1.1fr 1fr; gap: 4rem; } }

/* Los cinco principios */
.tenets { list-style: none; margin: 0; padding: 0; border-top: 3px solid var(--sky); }
.tenets li { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.tenets strong { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.35rem; display: block; }
.tenets span { color: var(--ink-soft); font-size: .98rem; }

/* Horarios */
.band { background: var(--paper-2); }
.days { font-weight: 600; margin: -.5rem 0 2rem; color: var(--ink-soft); }
.classes { display: grid; grid-template-columns: 1fr; gap: 1rem; }
@media (min-width: 720px) { .classes { grid-template-columns: repeat(3, 1fr); } }
.class { background: var(--paper); border: 1px solid var(--line); border-top-width: 10px; padding: 1.4rem 1.4rem 1.6rem; }
.class.k { border-top-color: var(--sun); }
.class.t { border-top-color: var(--sky); }
.class.a { border-top-color: var(--brand); }
.class .time { font-family: var(--display); font-weight: 900; font-stretch: 75%; font-size: 2.6rem; line-height: 1; margin: .5rem 0 .3rem; }
.class p { margin: 0; color: var(--ink-soft); font-size: .97rem; }
.where { margin-top: 2rem; padding-left: 1rem; border-left: 4px solid var(--sun); }
.where b { display: block; font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.3rem; }
.where span { color: var(--ink-soft); }
.where a { font-weight: 600; }

/* Maestro */
.master { display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: start; }
@media (min-width: 820px) {
  .master { grid-template-columns: 340px 1fr; gap: 4rem; align-items: center; }
  .master > div { display: flex; flex-direction: column; justify-content: center; }
}
.portrait { display: block; width: 100%; height: auto; border-radius: 2rem; background: var(--paper-2); object-fit: cover; object-position: center 20%; }
.facts { display: flex; gap: 2rem; flex-wrap: wrap; margin: 1.25rem 0 0; padding: 0; list-style: none; }
.facts li { border-left: 4px solid var(--sun); padding-left: .8rem; }
.facts b { display: block; font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.3rem; }
.facts span { color: var(--ink-soft); font-size: .92rem; }

/* Galería */
.gallery { border: 2px solid var(--brand); padding: clamp(1.5rem, 4vw, 3rem); display: flex; gap: 1.5rem; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.gallery p { margin: 0; max-width: 46ch; }

/* Contacto */
.contact dl { display: grid; grid-template-columns: max-content 1fr; gap: .6rem 1.5rem; margin: 0; }
.contact dt { font-weight: 600; }
.contact dd { margin: 0; color: var(--ink-soft); }

footer { background: var(--paper-2); color: var(--ink-soft); border-top: 6px solid var(--sky); padding: 2rem 0; font-size: .92rem; }
footer .wrap { display: flex; gap: 1rem; justify-content: space-between; flex-wrap: wrap; align-items: center; }
footer img { width: 52px; height: 52px; vertical-align: middle; margin-right: .75rem; background: #fff; border-radius: 50%; padding: 4px; box-shadow: 0 4px 12px rgba(11,31,87,.18); }
/* Historia */
.facts.big { flex-direction: column; gap: 1.5rem; margin: 0; align-self: center; }
.facts.big li { border-left-width: 6px; padding-left: 1.1rem; }
.facts.big b { font-size: clamp(2.4rem, 6vw, 3.6rem); font-weight: 900; font-stretch: 75%; line-height: 1; color: var(--brand); }

/* Graduaciones y formas */
.sw { display: block; width: 84px; height: 16px; border-radius: 2px; border: 1px solid #8a94ad; background: linear-gradient(90deg, var(--c) 0 76%, var(--t) 76% 100%); flex: none; }
.grad { display: grid; grid-template-columns: 1fr; gap: 2.5rem; margin-top: 2rem; }
@media (min-width: 860px) { .grad { grid-template-columns: 1fr 1.2fr; gap: 4rem; } }
.ladder { list-style: none; margin: 0; padding: 0; border-top: 3px solid var(--sky); }
.ladder li { display: flex; align-items: center; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid var(--line); }
.ladder b { font-family: var(--display); font-weight: 800; font-stretch: 85%; min-width: 6.2rem; }
.meanings { margin: 0; display: grid; gap: 1.1rem; align-content: start; }
.meanings dt { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.25rem; display: flex; align-items: center; gap: .6rem; }
.meanings dd { margin: .15rem 0 0 1.85rem; color: var(--ink-soft); font-size: .98rem; }
.dot { width: 1.05rem; height: 1.05rem; border-radius: 50%; background: var(--c); border: 1px solid #8a94ad; flex: none; }
.tuls { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; grid-template-columns: 1fr; gap: 0 3rem; border-top: 3px solid var(--sky); }
@media (min-width: 760px) { .tuls { grid-template-columns: 1fr 1fr; } }
.tuls li { display: flex; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.tuls .sw { margin-top: .5rem; }
.tuls strong { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.3rem; }
.tuls small { margin-left: .6rem; color: var(--ink-soft); font-weight: 600; }
.tuls p { margin: .15rem 0 0; color: var(--ink-soft); font-size: .97rem; }
.note-tul { margin-top: 1.5rem; color: var(--ink-soft); }

.tabs { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 2rem; }
.tab { font: inherit; font-weight: 600; padding: .7rem 1.2rem; border: 2px solid var(--brand); background: transparent; color: var(--brand); cursor: pointer; border-radius: 2px; }
.tab:hover { background: var(--paper); }
.tab[aria-selected="true"] { background: var(--brand); color: var(--on-brand); }
[role="tabpanel"][hidden] { display: none; }
[role="tabpanel"] .tuls { margin-top: 1.25rem; }
.dans { margin-top: 1.25rem; border-top: 3px solid var(--sky); }
.dan-row { display: flex; align-items: center; gap: 1rem; padding: .9rem 0; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.dan-row b { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.2rem; min-width: 4rem; }
.chips { display: flex; gap: .5rem; flex-wrap: wrap; }
.chips span { font-family: var(--display); font-weight: 700; font-stretch: 90%; font-size: 1.05rem; padding: .25rem .8rem; background: var(--paper); border: 1px solid var(--line); border-radius: 2px; }

.dan-group { border-bottom: 1px solid var(--line); }
.dan-group summary { list-style: none; display: flex; align-items: center; gap: 1rem; padding: .9rem 0; cursor: pointer; flex-wrap: wrap; }
.dan-group summary::-webkit-details-marker { display: none; }
.dan-group summary::after { content: "+"; margin-left: auto; font-size: 1.6rem; line-height: 1; font-weight: 600; color: var(--brand); }
.dan-group[open] summary::after { content: "\2212"; }
.dan-group summary b { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.2rem; min-width: 4rem; }
.tul-list { list-style: none; margin: 0 0 1rem; padding: 0; display: grid; grid-template-columns: 1fr; gap: .75rem; }
@media (min-width: 760px) { .tul-list { grid-template-columns: 1fr 1fr; gap: .75rem 2rem; } }
.tul-list li { border-left: 4px solid var(--sky); padding: .3rem 0 .3rem 1rem; }
.tul-list strong { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 1.25rem; }
.tul-list small { margin-left: .6rem; color: var(--ink-soft); font-weight: 600; }
.tul-list p { margin: .15rem 0 0; color: var(--ink-soft); font-size: .97rem; }

/* Nosotros */
.facts.big.row { flex-direction: row; gap: clamp(1.5rem, 5vw, 3rem); margin-top: 2rem; align-self: auto; }
#nosotros .master { margin-top: clamp(3rem, 6vw, 5rem); padding-top: clamp(2.5rem, 5vw, 4rem); border-top: 1px solid var(--line); }
h3.sub { font-family: var(--display); font-weight: 800; font-stretch: 80%; font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1; margin: 0 0 1.25rem; color: var(--brand); }

@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hangul { color: #fff; opacity: .1; } }
:root[data-theme="dark"] .hangul { color: #fff; opacity: .1; }

/* Portada en mobile: escudo como watermark, hangul oculto */
@media (max-width: 859px) {
  .stage { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); --w: min(260px, 72vw); z-index: 0; pointer-events: none; justify-self: unset; }
  .hangul { display: none; }
  .hero .logo { opacity: .09; background: transparent; box-shadow: none; padding: 0; }
  .hero .wrap > div:first-child { position: relative; z-index: 1; }
}