/* =========================================================================
   DEOK — base.css
   구조 + 디자인 토큰. 색·폰트·모서리 등 '테마가 바꾸는 값'은 전부 CSS 변수로.
   테마 파일(themes/*.css)은 이 변수와 몇 개 레이아웃 규칙만 덮어쓴다.
   ========================================================================= */

/* ---- 기본 토큰(중립값). 테마가 없더라도 화면이 깨지지 않게 한다 ---- */
:root{
  /* 색 */
  --bg:#0a0b0f;
  --bg-2:#111319;
  --surface:#151824;
  --surface-2:#1c2030;
  --fg:#f3f5f9;
  --fg-muted:#a7adbe;
  --fg-dim:#6b7080;
  --accent:#3b6cff;
  --accent-2:#7aa2ff;
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.18);
  --live:#ff3b5c;

  /* 활자 (data-font 프리셋이 --font-display / --font-body 를 바꾼다) */
  --font-display:'Nanum Myeongjo', serif;
  --font-body:'Pretendard','Noto Sans KR', system-ui, sans-serif;
  --tracking:.02em;
  --tracking-wide:.28em;

  /* 형태 */
  --radius:14px;
  --radius-lg:22px;
  --radius-pill:999px;
  --maxw:1180px;
  --gutter:clamp(18px,4vw,44px);
  --shadow:0 20px 60px rgba(0,0,0,.45);

  /* 히어로 배경(테마가 교체). 실제 사진은 나중에 data-block-bg 로 꽂는다 */
  --hero-image:
    radial-gradient(120% 90% at 70% 10%, rgba(59,108,255,.20), transparent 55%),
    radial-gradient(90% 70% at 20% 90%, rgba(122,162,255,.12), transparent 60%),
    linear-gradient(180deg, #0c0e15 0%, #070810 100%);
  --hero-overlay:linear-gradient(180deg, rgba(6,7,14,.15) 0%, rgba(6,7,14,.55) 60%, var(--bg) 100%);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-body);
  line-height:1.6;
  letter-spacing:var(--tracking);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .4s ease, color .4s ease;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.12;margin:0}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}
.eyebrow{
  font-size:.72rem;letter-spacing:var(--tracking-wide);text-transform:uppercase;
  color:var(--fg-muted);font-family:var(--font-body);font-weight:600;
}

/* ---------------------------- 상단 내비 ---------------------------- */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:24px;
  padding:16px var(--gutter);
  backdrop-filter:blur(12px);
  background:color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom:1px solid var(--line);
}
.brand{
  font-family:var(--font-display);font-weight:700;font-size:1.35rem;
  letter-spacing:.06em;
}
.brand b{color:var(--accent)}
.nav .links{display:flex;gap:22px;margin-left:8px}
.nav .links a{
  font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--fg-muted);font-weight:600;transition:color .2s;
}
.nav .links a:hover{color:var(--fg)}
.nav .spacer{margin-left:auto}
.btn{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  font-family:var(--font-body);font-weight:700;font-size:.82rem;letter-spacing:.08em;
  padding:10px 18px;border-radius:var(--radius-pill);border:1px solid transparent;
  transition:transform .15s ease, filter .2s ease, background .2s;
}
.btn:hover{transform:translateY(-1px)}
.btn-live{background:var(--live);color:#fff}
.btn-live .dot{width:8px;height:8px;border-radius:50%;background:#fff;
  box-shadow:0 0 0 0 rgba(255,255,255,.7);animation:pulse 1.8s infinite}
.btn-ghost{background:transparent;color:var(--fg);border-color:var(--line-strong)}
.btn-solid{background:var(--accent);color:#fff}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,255,255,.55)}70%{box-shadow:0 0 0 9px rgba(255,255,255,0)}100%{box-shadow:0 0 0 0 rgba(255,255,255,0)}}

/* ---------------------------- 히어로 ---------------------------- */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden}
.hero .bg{position:absolute;inset:0;background:var(--hero-image);background-size:cover;background-position:center}
.hero .bg::after{content:"";position:absolute;inset:0;background:var(--hero-overlay)}
.hero .inner{position:relative;z-index:2;padding-block:120px}
.hero .eyebrow{margin-bottom:22px}
.hero h1{
  font-size:clamp(2.4rem,6vw,4.6rem);letter-spacing:-.01em;
  text-shadow:0 2px 30px rgba(0,0,0,.5);
}
.hero .mark{
  font-family:var(--font-display);font-size:clamp(3rem,9vw,7rem);font-weight:700;
  letter-spacing:.12em;margin:26px 0 10px;
}
.hero .role{
  font-size:.82rem;letter-spacing:.34em;text-transform:uppercase;color:var(--fg-muted);
}
.hero .cta{display:flex;align-items:center;gap:18px;margin-top:40px}
.play{
  width:60px;height:60px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);background:color-mix(in srgb,var(--surface) 60%,transparent);
  color:var(--fg);cursor:pointer;transition:transform .2s, background .2s;
}
.play:hover{transform:scale(1.06);background:var(--accent);border-color:transparent;color:#fff}
.play svg{width:20px;height:20px;margin-left:3px}
.hero .cta .label{font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--fg-muted)}
.scroll-hint{
  position:absolute;bottom:26px;right:var(--gutter);z-index:2;
  font-size:.72rem;letter-spacing:.24em;text-transform:uppercase;color:var(--fg-dim);
  display:flex;align-items:center;gap:10px;
}
.scroll-hint::after{content:"";width:48px;height:1px;background:var(--fg-dim)}

/* ---------------------------- 밴드(구호) ---------------------------- */
.band{padding:clamp(56px,9vw,110px) 0;border-top:1px solid var(--line);background:var(--bg-2)}
.band h2{font-size:clamp(1.6rem,4.4vw,3rem);max-width:16ch}
.band p{color:var(--fg-muted);max-width:46ch;margin-top:18px;font-size:1.02rem}

/* ---------------------------- 3장 카드 ---------------------------- */
.trio{padding:0 0 clamp(56px,9vw,110px);background:var(--bg-2)}
.trio .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  position:relative;border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;min-height:260px;display:flex;flex-direction:column;justify-content:flex-end;
  padding:26px;background:var(--surface);transition:transform .25s ease, border-color .25s;
}
.card:hover{transform:translateY(-6px);border-color:var(--line-strong)}
.card .tag{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--accent-2);font-weight:700}
.card h3{font-size:1.5rem;margin:10px 0 6px;font-family:var(--font-body);font-weight:800;letter-spacing:0}
.card p{color:var(--fg-muted);font-size:.92rem;margin:0}
.card .sheen{position:absolute;inset:0;z-index:-1;opacity:.5;
  background:radial-gradient(120% 100% at 50% 0%, color-mix(in srgb,var(--accent) 22%, transparent), transparent 60%)}

/* ---- streaming-hub 테마가 켜는 라이브 레일(기본은 숨김) ---- */
.live-rail{display:none}

/* ---------------------------- 푸터 ---------------------------- */
.foot{padding:56px 0;border-top:1px solid var(--line);display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.foot .brand{font-size:1.1rem}
.foot .muted{color:var(--fg-dim);font-size:.82rem;letter-spacing:.06em}
.foot .spacer{margin-left:auto}
.foot .social{display:flex;gap:14px;color:var(--fg-muted)}
.foot .social a:hover{color:var(--fg)}

/* ---------------------------- 테마·폰트 전환기 ---------------------------- */
.switcher{position:fixed;right:20px;bottom:20px;z-index:80;font-family:var(--font-body)}
.switcher .toggle{
  width:52px;height:52px;border-radius:50%;border:1px solid var(--line-strong);
  background:var(--surface);color:var(--fg);cursor:pointer;display:grid;place-items:center;
  box-shadow:var(--shadow);transition:transform .2s}
.switcher .toggle:hover{transform:rotate(20deg)}
.switcher .panel{
  position:absolute;right:0;bottom:64px;width:280px;padding:18px;
  background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius);
  box-shadow:var(--shadow);display:none;
}
.switcher.open .panel{display:block}
.switcher .panel h4{margin:0 0 10px;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--fg-muted);font-family:var(--font-body);font-weight:700}
.switcher .panel h4:not(:first-child){margin-top:18px}
.opt-row{display:flex;gap:8px;flex-wrap:wrap}
.opt{
  flex:1 1 auto;min-width:78px;padding:9px 10px;border-radius:10px;cursor:pointer;
  border:1px solid var(--line);background:var(--bg-2);color:var(--fg-muted);
  font-size:.78rem;font-weight:600;text-align:center;transition:.15s;
}
.opt:hover{color:var(--fg);border-color:var(--line-strong)}
.opt[aria-pressed="true"]{background:var(--accent);color:#fff;border-color:transparent}
.opt .sw{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:-1px}

/* ---------------------------- 반응형 ---------------------------- */
@media (max-width:920px){
  .nav .links{display:none}
  .trio .grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .hero{min-height:80vh}
  .foot{flex-direction:column;align-items:flex-start}
}