/* ==========================================
   A-ONE 입시학원 — 디자인 시스템
   Premium prep academy · Navy / Gold / Ivory
   ========================================== */
:root{
  --navy:#0B1B3A; --navy-2:#122A52; --navy-3:#1C3A6E;
  --gold:#C2A35A; --gold-2:#D8BE7E; --gold-deep:#9C7E3A;
  --ivory:#F7F4EE; --ivory-2:#EFEAE0;
  --ink:#11151C; --ink-2:#3A4250; --ink-3:#6B7280; --ink-4:#9AA1AC;
  --line:#E6E1D6; --line-d:rgba(255,255,255,.12);
  --serif:'Noto Serif KR',serif;
  --sans:'Pretendard','Pretendard Variable',-apple-system,sans-serif;
  --r:18px; --shadow:0 18px 50px rgba(11,27,58,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--ivory);line-height:1.6;-webkit-font-smoothing:antialiased;letter-spacing:-0.01em}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.serif{font-family:var(--serif)}
.container{max-width:1240px;margin:0 auto;padding:0 28px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--gold-deep)}
.eyebrow.on-dark{color:var(--gold-2)}
.gold-line{width:48px;height:2px;background:var(--gold);border:0}

/* ---- 헤더 ---- */
.hdr{position:fixed;inset:0 0 auto 0;z-index:50;transition:background .3s,box-shadow .3s,border-color .3s;border-bottom:1px solid transparent}
.hdr-in{height:78px;display:flex;align-items:center;justify-content:space-between;max-width:1240px;margin:0 auto;padding:0 28px}
.brand{display:flex;align-items:baseline;gap:9px;font-family:var(--serif);font-weight:700;font-size:24px;color:#fff;letter-spacing:.02em;transition:color .3s}
.brand b{color:var(--gold-2)}
.brand span{font-family:var(--sans);font-size:11px;font-weight:600;letter-spacing:.18em;color:rgba(255,255,255,.6)}
.gnb{display:flex;align-items:center;gap:6px}
.gnb a{padding:10px 16px;font-size:15px;font-weight:600;color:rgba(255,255,255,.82);border-radius:8px;transition:color .2s,background .2s}
.gnb a:hover{color:#fff}
.hdr-cta{display:flex;align-items:center;gap:16px}
.hdr-tel{font-family:var(--serif);font-size:18px;font-weight:700;color:#fff;letter-spacing:.02em}
.btn{display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 22px;border-radius:10px;font-size:14px;font-weight:700;cursor:pointer;border:1px solid transparent;transition:all .2s;white-space:nowrap}
.btn-gold{background:var(--gold);color:var(--navy)}
.btn-gold:hover{background:var(--gold-2);transform:translateY(-1px);box-shadow:0 10px 24px rgba(194,163,90,.32)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{border-color:var(--gold-2);color:var(--gold-2)}
.btn-lg{height:56px;padding:0 30px;font-size:16px}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2)}
/* scrolled */
.hdr.scrolled{background:rgba(11,27,58,.96);backdrop-filter:saturate(140%) blur(8px);border-color:var(--line-d);box-shadow:0 8px 30px rgba(0,0,0,.18)}

.mtoggle{display:none;width:44px;height:44px;border:0;background:transparent;color:#fff;font-size:22px;cursor:pointer}

/* ---- 히어로 ---- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden;
  background:radial-gradient(120% 90% at 80% 10%,#1C3A6E 0%,#0B1B3A 55%,#081429 100%)}
.hero::before{content:"";position:absolute;inset:0;background-image:
  linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(70% 60% at 70% 30%,#000,transparent)}
.hero::after{content:"";position:absolute;right:-8%;top:-10%;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(194,163,90,.22),transparent 62%);filter:blur(10px)}
.hero-in{position:relative;z-index:2;width:100%;padding:120px 0 90px}
.hero-badge{display:inline-flex;align-items:center;gap:9px;padding:8px 16px;border:1px solid rgba(194,163,90,.4);border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--gold-2);margin-bottom:26px;background:rgba(194,163,90,.06)}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(40px,6vw,76px);line-height:1.18;letter-spacing:-0.02em;margin-bottom:22px}
.hero h1 em{font-style:normal;color:var(--gold-2);position:relative}
.hero p{font-size:clamp(16px,1.5vw,19px);color:rgba(255,255,255,.72);max-width:560px;line-height:1.8;margin-bottom:38px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-scroll{position:absolute;left:50%;bottom:30px;transform:translateX(-50%);z-index:2;color:rgba(255,255,255,.5);font-size:11px;letter-spacing:.2em;text-align:center}
.hero-scroll i{display:block;margin-top:8px;animation:bob 1.8s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(6px)}}

/* ---- 섹션 공통 ---- */
.section{padding:110px 0}
.section-head{max-width:680px;margin:0 auto 60px;text-align:center}
.section-head .gold-line{margin:18px auto 0}
.section-head h2{font-family:var(--serif);font-weight:700;font-size:clamp(28px,3.6vw,42px);line-height:1.3;letter-spacing:-0.02em;margin-top:14px;color:var(--ink)}
.section-head p{margin-top:16px;color:var(--ink-3);font-size:16px;line-height:1.8}
.section-dark{background:var(--navy);color:#fff}
.section-dark .section-head h2{color:#fff}
.section-dark .section-head p{color:rgba(255,255,255,.66)}

/* ---- 합격 실적 ---- */
.stats{background:linear-gradient(180deg,#0B1B3A,#0E2348);color:#fff;padding:70px 0;position:relative}
.stats::before{content:"";position:absolute;inset:0;background-image:linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:25% 100%}
.stats-grid{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .num{font-family:var(--serif);font-weight:700;font-size:clamp(38px,4.4vw,58px);color:var(--gold-2);line-height:1;letter-spacing:-0.02em}
.stat .num small{font-size:.42em;color:#fff;margin-left:4px;font-weight:600}
.stat .lb{margin-top:12px;font-size:14px;color:rgba(255,255,255,.74);font-weight:600}

/* ---- 철학/소개 ---- */
.intro-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.intro-vis{position:relative;aspect-ratio:4/5;border-radius:var(--r);overflow:hidden;background:
  linear-gradient(160deg,#16315e,#0B1B3A);box-shadow:var(--shadow)}
.intro-vis::after{content:"A·ONE";position:absolute;inset:0;display:grid;place-items:center;font-family:var(--serif);
  font-size:90px;font-weight:700;color:rgba(194,163,90,.16);letter-spacing:.05em}
.intro-vis .seal{position:absolute;right:22px;bottom:22px;width:96px;height:96px;border:1.5px solid var(--gold-2);border-radius:50%;
  display:grid;place-items:center;text-align:center;font-size:10px;letter-spacing:.12em;color:var(--gold-2);font-weight:700;background:rgba(11,27,58,.4)}
.intro h2{font-family:var(--serif);font-weight:700;font-size:clamp(26px,3vw,38px);line-height:1.35;letter-spacing:-0.02em;margin:16px 0 22px}
.intro p{color:var(--ink-2);font-size:16px;line-height:1.95;margin-bottom:16px}
.intro .sign{margin-top:26px;font-family:var(--serif);font-size:15px;color:var(--ink-3)}
.intro .sign b{color:var(--ink);font-size:18px}

/* ---- 강사진 ---- */
.fac-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.fac{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .25s,box-shadow .25s}
.fac:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.fac-ph{aspect-ratio:3/3.4;background:linear-gradient(160deg,#1C3A6E,#0B1B3A);position:relative}
.fac-ph::after{content:attr(data-init);position:absolute;inset:0;display:grid;place-items:center;font-family:var(--serif);font-size:52px;color:rgba(216,190,126,.5);font-weight:700}
.fac-sub{position:absolute;left:14px;top:14px;padding:5px 11px;background:var(--gold);color:var(--navy);font-size:11px;font-weight:800;border-radius:6px;letter-spacing:.02em}
.fac-body{padding:20px}
.fac-body h4{font-family:var(--serif);font-size:19px;font-weight:700}
.fac-body .role{font-size:13px;color:var(--gold-deep);font-weight:700;margin-top:3px}
.fac-body p{font-size:13.5px;color:var(--ink-3);margin-top:10px;line-height:1.7}

/* ---- 커리큘럼 ---- */
.curr-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.curr{padding:34px 30px;border:1px solid var(--line-d);border-radius:var(--r);background:rgba(255,255,255,.03);transition:border-color .25s,background .25s}
.curr:hover{border-color:rgba(194,163,90,.5);background:rgba(194,163,90,.05)}
.curr .no{font-family:var(--serif);font-size:15px;color:var(--gold-2);letter-spacing:.1em}
.curr h4{font-family:var(--serif);font-size:24px;font-weight:700;margin:14px 0 12px;color:#fff}
.curr p{font-size:14.5px;color:rgba(255,255,255,.66);line-height:1.8}
.curr ul{margin-top:16px;list-style:none;display:flex;flex-direction:column;gap:8px}
.curr li{font-size:13.5px;color:rgba(255,255,255,.8);display:flex;gap:9px;align-items:flex-start}
.curr li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold);margin-top:7px;flex-shrink:0}

/* ---- 관리 시스템 ---- */
.mng-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mng{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:34px 30px;transition:transform .25s,box-shadow .25s}
.mng:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.mng .ic{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;background:var(--navy);color:var(--gold-2);font-size:22px;margin-bottom:20px}
.mng h4{font-family:var(--serif);font-size:21px;font-weight:700;margin-bottom:10px}
.mng p{font-size:14.5px;color:var(--ink-3);line-height:1.8}

/* ---- 후기 ---- */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:32px;position:relative}
.rev .q{font-family:var(--serif);font-size:60px;color:var(--ivory-2);line-height:.6;position:absolute;top:24px;right:26px}
.rev .univ{display:inline-block;padding:5px 12px;background:var(--navy);color:var(--gold-2);font-size:12px;font-weight:700;border-radius:6px;margin-bottom:16px}
.rev p{font-size:15px;color:var(--ink-2);line-height:1.85;position:relative;z-index:1}
.rev .by{margin-top:18px;font-size:13px;color:var(--ink-4);font-weight:600}

/* ---- 갤러리 ---- */
.gal{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:170px;gap:14px}
.gal div{border-radius:14px;background:linear-gradient(150deg,#1C3A6E,#0B1B3A);position:relative;overflow:hidden}
.gal div::after{content:attr(data-l);position:absolute;left:16px;bottom:14px;color:rgba(255,255,255,.55);font-size:13px;font-weight:600;letter-spacing:.02em}
.gal .big{grid-row:span 2}

/* ---- CTA/설명회 ---- */
.cta{background:radial-gradient(120% 100% at 50% 0%,#16315e,#0B1B3A);color:#fff;padding:90px 0}
.cta-card{max-width:980px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.cta-card h2{font-family:var(--serif);font-size:clamp(26px,3vw,38px);line-height:1.35;margin:14px 0 16px}
.cta-card p{color:rgba(255,255,255,.7);font-size:15px;line-height:1.8}
.form{background:rgba(255,255,255,.05);border:1px solid var(--line-d);border-radius:var(--r);padding:28px}
.form .row{margin-bottom:14px}
.form label{display:block;font-size:12.5px;font-weight:600;color:rgba(255,255,255,.6);margin-bottom:7px;letter-spacing:.02em}
.form input,.form select{width:100%;height:46px;background:rgba(255,255,255,.04);border:1px solid var(--line-d);border-radius:9px;padding:0 14px;color:#fff;font-size:14px;font-family:var(--sans)}
.form input::placeholder{color:rgba(255,255,255,.35)}
.form input:focus,.form select:focus{outline:none;border-color:var(--gold-2)}
.form option{color:#111}

/* ---- 푸터 ---- */
.ft{background:#081429;color:rgba(255,255,255,.6);padding:62px 0 30px;border-top:1px solid var(--line-d)}
.ft-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--line-d)}
.ft .brand{font-size:22px;margin-bottom:14px}
.ft p{font-size:13.5px;line-height:1.9}
.ft h5{color:#fff;font-size:13px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.ft ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.ft ul a{font-size:14px;color:rgba(255,255,255,.6)}
.ft ul a:hover{color:var(--gold-2)}
.ft-bot{padding-top:24px;font-size:12.5px;color:rgba(255,255,255,.4)}

/* ---- 플로팅 ---- */
.float{position:fixed;right:24px;bottom:24px;z-index:40;display:flex;flex-direction:column;gap:10px}
.float a{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-size:13px;font-weight:700;color:var(--navy);background:var(--gold);box-shadow:0 10px 24px rgba(0,0,0,.2);text-align:center;line-height:1.1}

/* 모바일 메뉴 */
.mnav{position:fixed;inset:0;z-index:60;background:var(--navy);transform:translateX(100%);transition:transform .35s;padding:90px 32px 40px;display:flex;flex-direction:column;gap:8px}
.mnav.open{transform:translateX(0)}
.mnav a{font-family:var(--serif);font-size:22px;color:#fff;padding:14px 0;border-bottom:1px solid var(--line-d)}
.mnav .mclose{position:absolute;top:24px;right:24px;width:44px;height:44px;background:transparent;border:0;color:#fff;font-size:24px}

@media(max-width:980px){
  .gnb,.hdr-cta .hdr-tel,.hdr-cta .btn{display:none}
  .mtoggle{display:block}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:36px 24px}
  .intro-grid{grid-template-columns:1fr;gap:36px}
  .intro-vis{aspect-ratio:16/11}
  .fac-grid{grid-template-columns:repeat(2,1fr)}
  .curr-grid,.mng-grid,.rev-grid{grid-template-columns:1fr}
  .gal{grid-template-columns:repeat(2,1fr)}
  .cta-card{grid-template-columns:1fr;gap:28px}
  .ft-top{grid-template-columns:1fr;gap:28px}
  .section{padding:72px 0}
}
@media(max-width:520px){
  .container,.hdr-in{padding:0 18px}
  .fac-grid,.gal{grid-template-columns:1fr}
  .hero h1{font-size:38px}
}