/* =============================================
   StudioSeiHa — common.css  (redesign 2026)
   tokens · nav · hero · buttons · marquee · audio · footer
   ============================================= */

:root{
  --ink:#15100E; --ink-2:#1F1815;
  --cream:#F7F2E9; --paper:#FCF9F3; --line:#E6DDCD; --line-soft:#EFE8DA;
  --t-dark:#1B1512; --t-body:#574D45; --t-light:#F4ECDF; --t-mute:#9A8E7E; --t-mute-d:#A99C8B;
  --coral:#E8654E; --coral-soft:#FBEDE8;
  --burg:#7C2230; --gold:#BE9A45; --navy:#2A3B55;
  --max:1180px; --radius:16px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Pretendard',system-ui,sans-serif;background:var(--paper);color:var(--t-dark);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.display{font-family:'Space Grotesk','Pretendard',sans-serif}
.wrap{max-width:var(--max);margin:0 auto;padding:0 2rem}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.label{font-family:'Space Grotesk',sans-serif;font-size:.72rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--t-mute)}

/* ── NAV ── */
#navbar{position:fixed;inset:0 0 auto 0;z-index:200;display:flex;align-items:center;justify-content:space-between;
  padding:1.3rem 2rem;transition:background .35s,padding .35s,border-color .35s,color .35s;border-bottom:1px solid transparent;color:var(--t-dark)}
#navbar.scrolled{background:rgba(252,249,243,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft);padding:.85rem 2rem}
#navbar.on-hero:not(.scrolled){color:var(--t-light)}
.nav-logo{font-family:'Space Grotesk';font-weight:700;font-size:1.1rem;letter-spacing:.05em;display:flex;align-items:center;gap:.5rem;color:inherit}
.nav-logo-dot{width:8px;height:8px;border-radius:2px;background:var(--coral);transform:rotate(45deg);display:inline-block}
.nav-links{display:flex;gap:2.1rem;list-style:none;align-items:center;margin-left:auto;margin-right:2.4rem}
.nav-links a{font-size:.85rem;font-weight:500;color:inherit;opacity:.78;transition:opacity .2s}
.nav-links a:hover{opacity:1}
.nav-back{font-size:.83rem;font-weight:500;color:inherit;opacity:.8;display:inline-flex;align-items:center;gap:.3rem;transition:opacity .2s}
.nav-back:hover{opacity:1}
.nav-cta{font-family:'Space Grotesk';font-size:.8rem;font-weight:600;padding:.5rem 1.1rem;border:1px solid currentColor;border-radius:99px;color:inherit;transition:background .2s,color .2s}
#navbar:not(.on-hero) .nav-cta:hover,#navbar.scrolled .nav-cta:hover{background:var(--t-dark);color:var(--paper)}
#navbar.on-hero:not(.scrolled) .nav-cta:hover{background:var(--t-light);color:var(--ink)}

/* ── BUTTONS ── */
.btn{font-family:'Space Grotesk';font-weight:600;font-size:.9rem;padding:.82rem 1.55rem;border-radius:99px;
  transition:transform .15s,background .2s,color .2s,border-color .2s;display:inline-flex;align-items:center;gap:.5rem;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--coral);color:#fff}
.btn-primary:hover{background:#ef7660;transform:translateY(-2px)}
.btn-ghost{border-color:rgba(244,236,223,.32);color:var(--t-light)}
.btn-ghost:hover{border-color:var(--t-light);transform:translateY(-2px)}
.btn-dark{background:var(--ink);color:var(--t-light)}
.btn-dark:hover{transform:translateY(-2px);background:#241c18}
.btn-outline{border-color:var(--line);color:var(--t-dark);background:transparent}
.btn-outline:hover{border-color:var(--t-mute);transform:translateY(-2px)}
.btn-gold{background:var(--gold);color:#241c18}
.btn-gold:hover{transform:translateY(-2px);filter:brightness(1.05)}

/* ── HERO (index) — animated sound wave + title below ── */
.hero{position:relative;background:var(--ink);color:var(--t-light);min-height:100svh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;padding:7rem 1.5rem 7rem;overflow:hidden;text-align:center}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(90% 65% at 50% 26%,rgba(190,154,69,.18),transparent 60%),
             radial-gradient(85% 65% at 82% 88%,rgba(42,59,85,.46),transparent 62%),
             radial-gradient(70% 55% at 14% 82%,rgba(190,154,69,.10),transparent 60%);pointer-events:none}
.hero-wave{position:relative;z-index:2;width:min(1080px,92vw);height:clamp(200px,32vh,320px);display:block}
.hero-content{position:relative;z-index:3;margin-top:.5vh}
.hero-label{font-family:'Space Grotesk';font-size:.74rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--gold);margin-bottom:1.1rem}
.hero-title{font-family:'Space Grotesk';font-weight:700;font-size:clamp(3rem,9.5vw,6.4rem);line-height:.94;letter-spacing:-.025em}
.hero-also{margin-top:1.1rem;font-family:'Space Grotesk';font-weight:500;font-size:clamp(.95rem,2.2vw,1.3rem);color:var(--t-mute-d)}
.hero-also b{color:var(--gold);font-weight:500}
.hero-btns{margin-top:2rem;display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}
/* bottom equalizer removed — spectrum hero is the single audio motif */

/* ── MARQUEE / 협업사 strip ── */
.strip{background:var(--ink-2);color:var(--t-light);padding:1.7rem 0 1.8rem;overflow:hidden;border-top:1px solid rgba(255,255,255,.05)}
.strip-label{text-align:center;font-family:'Space Grotesk';font-size:.7rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--gold);margin-bottom:1.05rem}
.marquee{display:flex;width:max-content;animation:slide 32s linear infinite}
.marquee span{font-family:'Space Grotesk';white-space:nowrap;display:flex;align-items:center}
.marquee span::after{content:"";width:5px;height:5px;border-radius:1px;background:var(--gold);opacity:.5;margin:0 2.2rem;transform:rotate(45deg)}
.mq-co{font-size:1.12rem;font-weight:700;color:var(--gold);letter-spacing:.01em}
.mq-pj{font-size:.9rem;font-weight:500;color:var(--t-mute-d)}
@keyframes slide{to{transform:translateX(-50%)}}

/* ── SECTION SHELL ── */
section{padding:7rem 0}
.sec-head{max-width:46ch;margin-bottom:3rem}
.sec-eyebrow{font-family:'Space Grotesk';font-size:.72rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;color:var(--t-mute)}
.sec-title{font-family:'Space Grotesk';font-weight:700;font-size:clamp(1.85rem,4.2vw,2.85rem);line-height:1.1;letter-spacing:-.015em;margin-top:.7rem}
.sec-bar{width:34px;height:3px;background:var(--coral);border-radius:2px;margin:1rem 0}
.section-link{font-family:'Space Grotesk';font-size:.85rem;font-weight:600;color:var(--coral);display:inline-flex;align-items:center;gap:.35rem;transition:gap .2s}
.section-link:hover{gap:.65rem}
.breadcrumb{display:flex;align-items:center;gap:.4rem;font-size:.72rem;color:var(--t-mute);margin-bottom:1.6rem}
.breadcrumb a{color:var(--t-mute);transition:color .2s}
.breadcrumb a:hover{color:var(--coral)}

/* ── PILLS / TAGS ── */
.pill{font-family:'Space Grotesk';font-size:.7rem;font-weight:600;padding:.3rem .7rem;border-radius:99px}
.pill-navy{background:var(--navy);color:#fff}
.pill-gold{background:#F6EFD9;color:#7A5A1A;border:1px solid rgba(190,154,69,.3)}
.pill-coral{background:var(--coral-soft);color:#C84B2B}
.tag{font-family:'Space Grotesk';font-size:.76rem;font-weight:500;padding:.32rem .8rem;border-radius:99px;border:1px solid var(--line);color:#6f655c}

/* ── AUDIO PLAYER (shared w/ kids page; matches audio.js) ── */
.audio-ctrl{display:flex;align-items:center;gap:.85rem;flex:none}
.play-btn{width:46px;height:46px;border-radius:50%;border:0;flex:none;cursor:pointer;background:var(--coral);
  display:grid;place-items:center;transition:transform .15s,box-shadow .15s;box-shadow:0 4px 12px rgba(232,101,78,.32)}
.play-btn:hover{transform:scale(1.07);box-shadow:0 6px 16px rgba(232,101,78,.42)}
.play-btn svg{width:11px;height:13px;fill:#fff}
.mini-bar{width:130px;height:6px;background:var(--line);border-radius:99px;overflow:hidden;cursor:pointer}
.mini-fill{height:100%;width:0;background:linear-gradient(90deg,var(--coral),var(--gold));border-radius:99px;transition:width .15s linear}
.track-time{font-family:'Space Grotesk';font-size:.78rem;color:var(--t-mute);min-width:74px;text-align:right;font-variant-numeric:tabular-nums}
/* preview badge + copyright notice */
.preview-tag{display:inline-flex;align-items:center;gap:.4rem;font-family:'Space Grotesk';font-size:.64rem;font-weight:600;
  letter-spacing:.08em;text-transform:uppercase;color:var(--gold-ink);background:rgba(190,154,69,.12);
  border-radius:99px;padding:.25rem .6rem;margin-left:.6rem}
.copyright-note{display:flex;align-items:flex-start;gap:.7rem;margin-top:1.4rem;padding:.95rem 1.2rem;
  background:rgba(42,59,85,.05);border:1px solid rgba(42,59,85,.12);border-radius:12px;
  font-size:.84rem;line-height:1.6;color:var(--t-body)}
.copyright-note .cn-ico{flex:none;font-size:1rem;line-height:1.4}
.copyright-note b{color:var(--navy);font-weight:600}

/* ── FOOTER ── */
footer{background:var(--ink);color:var(--t-mute-d);padding:3.5rem 0}
footer .wrap,.footer-row{max-width:var(--max);margin:0 auto;padding-left:2rem;padding-right:2rem}
.footer-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.4rem}
.f-logo{font-family:'Space Grotesk';font-weight:700;font-size:1.15rem;letter-spacing:.05em;color:var(--t-light);display:inline-flex;align-items:center;gap:.4rem}
.f-logo-dot{width:7px;height:7px;border-radius:2px;background:var(--coral);transform:rotate(45deg);display:inline-block}
.f-copy{font-size:.8rem;color:var(--t-mute-d)}
.f-links{display:flex;gap:1.4rem}
.f-links a{font-size:.8rem;color:var(--t-mute-d);transition:color .2s}
.f-links a:hover{color:var(--t-light)}

/* ── REVEAL / SCROLL EFFECTS ── */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.65,.3,1),transform .8s cubic-bezier(.2,.65,.3,1)}
.reveal.visible{opacity:1;transform:none}
.reveal[data-rv="left"]{transform:translateX(-46px)}
.reveal[data-rv="right"]{transform:translateX(46px)}
.reveal[data-rv="scale"]{transform:scale(.94)}
.reveal[data-rv].visible{transform:none}
.fade{opacity:0;transition:opacity .9s ease}
.fade.visible{opacity:1}
.rd1{transition-delay:.08s}.rd2{transition-delay:.18s}.rd3{transition-delay:.28s}.rd4{transition-delay:.38s}
#scrollProgress{position:fixed;top:0;left:0;height:3px;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--gold),var(--coral));z-index:300;pointer-events:none;transition:transform .08s linear}

/* ── RESPONSIVE ── */
@media(max-width:880px){
  #navbar{padding:1rem 1.4rem}#navbar.scrolled{padding:.8rem 1.4rem}
  .nav-links{display:none}
  .wrap{padding:0 1.4rem}
  section{padding:5rem 0}
  .hero-wave{width:min(560px,94vw);height:clamp(110px,19vh,170px)}
  footer .wrap,.footer-row{padding-left:1.4rem;padding-right:1.4rem}
}
@media(max-width:520px){.footer-row{flex-direction:column;align-items:flex-start}}
@media(prefers-reduced-motion:reduce){.marquee{animation:none}.reveal,.fade{opacity:1;transform:none;transition:none}}