/* ==========================================================================
   SNU Business Alumni — Design System  v0.1
   Palette: Deep Navy / Champagne Gold / Ivory / Graphite
   ========================================================================== */
:root{
  --navy-900:#071429; --navy-800:#0B1F3A; --navy-700:#12294D; --navy-600:#1B3868;
  --gold-500:#B8952E; --gold-400:#C9A961; --gold-300:#DCC392; --gold-100:#F3EAD3;
  --ivory:#F7F4EE; --ivory-2:#EFEAE0; --paper:#FFFFFF;
  --ink:#1A1A1A; --ink-2:#3B3F47; --ink-3:#6B7280; --line:#E4DFD3; --line-2:#D2CBBB;
  --success:#2E7D5B; --warn:#B26A00; --danger:#A93226; --info:#2F5F98;
  --serif:"Noto Serif KR","Cormorant Garamond",Georgia,"Times New Roman",serif;
  --display:"Cormorant Garamond","Noto Serif KR",Georgia,serif;
  --sans:"Noto Sans KR",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --max:1240px; --gutter:clamp(20px,4vw,48px);
  --r:2px; --r-lg:6px;
  --shadow-1:0 1px 2px rgba(7,20,41,.06),0 8px 24px -12px rgba(7,20,41,.18);
  --shadow-2:0 2px 4px rgba(7,20,41,.08),0 24px 48px -20px rgba(7,20,41,.28);
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.7;color:var(--ink);background:var(--ivory);font-feature-settings:"palt";word-break:keep-all;overflow-wrap:anywhere}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.3;margin:0;color:var(--navy-800);letter-spacing:-.01em}
h1{font-size:clamp(34px,4.6vw,58px);font-weight:500}
h2{font-size:clamp(26px,3vw,38px)}
h3{font-size:clamp(19px,2vw,23px)}
h4{font-size:17px}
p{margin:0 0 1em}
.en{font-family:var(--display);letter-spacing:.02em}
.eyebrow{font-family:var(--display);font-size:13px;letter-spacing:.32em;text-transform:uppercase;color:var(--gold-500);font-weight:600;display:block;margin-bottom:14px}
.eyebrow::before{content:"";display:inline-block;width:28px;height:1px;background:var(--gold-400);vertical-align:middle;margin-right:12px}
.lede{font-size:clamp(17px,1.5vw,20px);color:var(--ink-2);line-height:1.8;font-weight:300}
.container{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(72px,9vw,128px) 0}
.section.tight{padding:clamp(48px,6vw,80px) 0}
.section.dark{background:var(--navy-800);color:var(--ivory)}
.section.dark h2,.section.dark h3{color:var(--paper)}
.section.dark .lede{color:rgba(247,244,238,.72)}
.section.paper{background:var(--paper)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:clamp(36px,4vw,56px);flex-wrap:wrap}
.section-head .lede{max-width:560px;margin:14px 0 0}
.hairline{height:1px;background:linear-gradient(90deg,var(--gold-400),transparent);border:0;margin:0}
.rule-gold{width:56px;height:2px;background:var(--gold-400);margin:18px 0 26px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 26px;border:1px solid var(--navy-800);background:var(--navy-800);color:var(--paper);font-size:14px;letter-spacing:.06em;font-weight:500;border-radius:var(--r);transition:all .35s var(--ease);white-space:nowrap}
.btn:hover{background:var(--navy-600);border-color:var(--navy-600);transform:translateY(-1px)}
.btn.gold{background:var(--gold-500);border-color:var(--gold-500);color:var(--navy-900)}
.btn.gold:hover{background:var(--gold-400);border-color:var(--gold-400)}
.btn.ghost{background:transparent;color:var(--navy-800)}
.btn.ghost:hover{background:var(--navy-800);color:var(--paper)}
.btn.ghost.light{color:var(--paper);border-color:rgba(255,255,255,.55)}
.btn.ghost.light:hover{background:var(--paper);color:var(--navy-800);border-color:var(--paper)}
.btn.sm{padding:9px 16px;font-size:13px}
.btn .arrow{transition:transform .35s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.link-more{font-family:var(--display);font-size:15px;letter-spacing:.14em;text-transform:uppercase;color:var(--navy-800);border-bottom:1px solid var(--gold-400);padding-bottom:3px;transition:color .3s}
.link-more:hover{color:var(--gold-500)}

/* Header */
.topbar{background:var(--navy-900);color:rgba(247,244,238,.75);font-size:12.5px;letter-spacing:.04em}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{opacity:.85;transition:opacity .2s}
.topbar a:hover{opacity:1;color:var(--gold-300)}
.topbar .links{display:flex;gap:22px}
.header{position:sticky;top:0;z-index:50;background:rgba(247,244,238,.92);backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:84px;gap:24px}
.brand{display:flex;align-items:center;gap:14px}
.brand .seal{width:46px;height:46px;flex:none}
.brand .name{display:flex;flex-direction:column;line-height:1.15}
.brand .name .ko{font-family:var(--serif);font-weight:600;font-size:17px;color:var(--navy-800);letter-spacing:-.01em}
.brand .name .en{font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold-500);margin-top:3px}
.nav{display:flex;gap:6px;margin:0;padding:0}
.nav>li{list-style:none;position:relative}
.nav>li>a{display:block;padding:30px 16px;font-size:15px;font-weight:500;color:var(--navy-800);letter-spacing:-.005em;position:relative}
.nav>li>a::after{content:"";position:absolute;left:16px;right:16px;bottom:24px;height:1px;background:var(--gold-500);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease)}
.nav>li:hover>a::after,.nav>li.active>a::after{transform:scaleX(1)}
.nav .sub{position:absolute;top:100%;left:0;min-width:220px;background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow-2);padding:14px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .3s var(--ease);list-style:none;margin:0}
.nav>li:hover .sub,.nav>li:focus-within .sub{opacity:1;visibility:visible;transform:translateY(0)}
.nav .sub a{display:block;padding:9px 22px;font-size:14px;color:var(--ink-2)}
.nav .sub a:hover{color:var(--navy-800);background:var(--ivory)}
.header-actions{display:flex;align-items:center;gap:14px}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line-2);border-radius:50%;background:transparent;color:var(--navy-800);transition:all .3s}
.icon-btn:hover{border-color:var(--navy-800)}
.burger{display:none}
@media (max-width:1024px){
  .nav{display:none}
  .burger{display:grid}
  .header .container{height:72px}
  .brand .name .ko{font-size:15px}
  .topbar{display:none}
}
.mobile-nav{position:fixed;inset:0;background:var(--navy-900);color:var(--paper);z-index:100;padding:32px var(--gutter);display:none;flex-direction:column;overflow:auto}
.mobile-nav.open{display:flex}
.mobile-nav .close{align-self:flex-end;color:var(--paper);border-color:rgba(255,255,255,.3)}
.mobile-nav ul{list-style:none;padding:0;margin:24px 0}
.mobile-nav li>a{display:block;font-family:var(--serif);font-size:24px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1);color:var(--paper)}
.mobile-nav .sub a{font-family:var(--sans);font-size:15px;padding:8px 0 8px 14px;opacity:.75;border:0}

/* Hero */
.hero{position:relative;min-height:min(86vh,820px);display:flex;align-items:flex-end;background:var(--navy-900);color:var(--paper);overflow:hidden;isolation:isolate}
.hero .bg{position:absolute;inset:0;z-index:-2;background:
  radial-gradient(1200px 600px at 80% 20%,rgba(201,169,97,.16),transparent 60%),
  radial-gradient(800px 500px at 10% 90%,rgba(27,56,104,.7),transparent 60%),
  linear-gradient(180deg,#0B1F3A 0%,#071429 100%)}
.hero .grid-lines{position:absolute;inset:0;z-index:-1;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:96px 96px;-webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse at 70% 40%,#000 30%,transparent 75%)}
.hero .seal-watermark{position:absolute;right:-4%;top:50%;transform:translateY(-50%);width:min(52vw,720px);opacity:.07;z-index:-1}
.hero .container{position:relative;padding-top:120px;padding-bottom:clamp(64px,8vw,110px);width:100%}
.hero h1{color:var(--paper);max-width:14ch}
.hero h1 em{font-style:normal;color:var(--gold-300)}
.hero .lede{color:rgba(247,244,238,.78);max-width:560px;margin:26px 0 40px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-foot{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid rgba(255,255,255,.12);margin-top:clamp(56px,7vw,96px);padding-top:28px;gap:24px}
.stat .num{font-family:var(--display);font-size:clamp(30px,3.2vw,44px);color:var(--gold-300);line-height:1;font-weight:500}
.stat .num small{font-size:.5em;margin-left:2px;color:var(--gold-400)}
.stat .label{font-size:13px;letter-spacing:.08em;color:rgba(247,244,238,.6);margin-top:8px}
@media (max-width:760px){.hero-foot{grid-template-columns:repeat(2,1fr)}}

/* Cards / grids */
.grid{display:grid;gap:28px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
@media (max-width:960px){.grid.c3,.grid.c4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.card{background:var(--paper);border:1px solid var(--line);padding:32px;position:relative;transition:all .4s var(--ease);display:block}
.card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px);border-color:var(--gold-300)}
.card .tag{display:inline-block;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-500);font-family:var(--display);font-weight:700;margin-bottom:14px}
.card h3{margin-bottom:12px}
.card p{color:var(--ink-2);font-size:15px}
.card .meta{font-size:13px;color:var(--ink-3);margin-top:18px;display:flex;justify-content:space-between}
.card.dark{background:var(--navy-800);border-color:var(--navy-700);color:var(--paper)}
.card.dark h3{color:var(--paper)}
.card.dark p{color:rgba(247,244,238,.7)}
.card .num-badge{font-family:var(--display);font-size:52px;color:var(--gold-100);position:absolute;top:14px;right:22px;line-height:1;font-weight:600}
.card.dark .num-badge{color:rgba(201,169,97,.2)}

/* Notice list */
.notice-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--navy-800)}
.notice-list li{border-bottom:1px solid var(--line)}
.notice-list a{display:grid;grid-template-columns:88px 1fr 110px;gap:20px;align-items:center;padding:20px 8px;transition:background .3s}
.notice-list a:hover{background:var(--paper)}
.notice-list .cat{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-500);font-family:var(--display);font-weight:700}
.notice-list .title{font-size:16px;color:var(--ink);font-weight:500}
.notice-list .date{font-size:13.5px;color:var(--ink-3);text-align:right;font-family:var(--display);letter-spacing:.04em}
@media (max-width:640px){.notice-list a{grid-template-columns:1fr;gap:6px}.notice-list .date{text-align:left}}

/* Feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,96px);align-items:center}
@media (max-width:900px){.split{grid-template-columns:1fr}}
.frame{position:relative;aspect-ratio:4/5;background:linear-gradient(160deg,var(--navy-700),var(--navy-900));overflow:hidden}
.frame::after{content:"";position:absolute;inset:18px;border:1px solid rgba(201,169,97,.45);pointer-events:none}
.frame .caption{position:absolute;left:36px;bottom:36px;color:var(--paper);font-family:var(--display);font-size:22px;letter-spacing:.06em}
.frame .caption small{display:block;font-family:var(--sans);font-size:12px;letter-spacing:.2em;opacity:.7;margin-bottom:8px;text-transform:uppercase}
.frame .seal-big{position:absolute;right:-10%;bottom:-10%;width:70%;opacity:.12}

/* Quote */
.quote{font-family:var(--serif);font-size:clamp(22px,2.4vw,30px);line-height:1.6;font-weight:400;color:var(--paper);max-width:24ch;margin:0}
.quote::before{content:"\201C";color:var(--gold-400);font-size:1.6em;line-height:0;vertical-align:-.3em;margin-right:6px}
.quote-by{margin-top:24px;font-size:14px;letter-spacing:.1em;color:var(--gold-300)}

/* Timeline */
.timeline{list-style:none;margin:0;padding:0;border-left:1px solid var(--gold-300);margin-left:8px}
.timeline li{position:relative;padding:0 0 32px 32px}
.timeline li::before{content:"";position:absolute;left:-5px;top:8px;width:9px;height:9px;border-radius:50%;background:var(--gold-500);box-shadow:0 0 0 4px var(--ivory)}
.timeline .year{font-family:var(--display);font-size:22px;color:var(--gold-500);letter-spacing:.06em;font-weight:600}
.timeline .body{font-size:15px;color:var(--ink-2);margin-top:4px}

/* Footer */
.footer{background:var(--navy-900);color:rgba(247,244,238,.7);padding:72px 0 36px;font-size:14px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
@media (max-width:900px){.footer .cols{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer .cols{grid-template-columns:1fr}}
.footer h4{color:var(--paper);font-family:var(--display);letter-spacing:.2em;text-transform:uppercase;font-size:12.5px;margin-bottom:18px}
.footer ul{list-style:none;padding:0;margin:0}
.footer li{margin-bottom:9px}
.footer a:hover{color:var(--gold-300)}
.footer .brand .name .ko{color:var(--paper)}
.footer .brand .name .en{color:var(--gold-300)}
.footer .legal{border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding-top:24px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12.5px;color:rgba(247,244,238,.45)}
.footer .legal a{margin-right:18px}

/* Page header (interior) */
.page-hero{background:var(--navy-800);color:var(--paper);padding:clamp(64px,8vw,110px) 0 clamp(40px,5vw,64px);position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;right:-120px;top:-120px;width:460px;height:460px;border-radius:50%;border:1px solid rgba(201,169,97,.25)}
.page-hero::before{content:"";position:absolute;right:-40px;top:-40px;width:300px;height:300px;border-radius:50%;border:1px solid rgba(201,169,97,.18)}
.page-hero h1{color:var(--paper);font-size:clamp(30px,3.6vw,46px)}
.page-hero .crumbs{font-size:13px;letter-spacing:.06em;color:rgba(247,244,238,.55);margin-bottom:20px;display:flex;gap:10px}
.page-hero .crumbs a:hover{color:var(--gold-300)}
.page-hero .lede{color:rgba(247,244,238,.72);max-width:640px;margin-top:18px}
.subnav{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:84px;z-index:40}
.subnav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0;overflow-x:auto}
.subnav a{display:block;padding:18px 18px 16px;font-size:14px;color:var(--ink-3);white-space:nowrap;border-bottom:2px solid transparent}
.subnav a.active,.subnav a:hover{color:var(--navy-800);border-color:var(--gold-500)}
@media (max-width:1024px){.subnav{top:72px}}

/* Prose */
.prose{max-width:780px;font-size:16.5px;line-height:1.9;color:var(--ink-2)}
.prose h2{margin:56px 0 18px;font-size:28px}
.prose h2:first-child{margin-top:0}
.prose h3{margin:36px 0 12px}
.prose ul,.prose ol{padding-left:22px}
.prose li{margin-bottom:6px}
.prose blockquote{border-left:2px solid var(--gold-400);margin:28px 0;padding:6px 0 6px 24px;font-family:var(--serif);color:var(--navy-800);font-size:19px}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;margin:20px 0}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.prose th{background:var(--ivory-2);font-weight:600;color:var(--navy-800);font-size:13px;letter-spacing:.04em}
.prose code{font-family:var(--mono);font-size:.88em;background:var(--ivory-2);padding:2px 6px;border-radius:3px}
.prose pre{background:var(--navy-900);color:#E6E1D6;padding:20px 24px;overflow:auto;font-size:13.5px;line-height:1.6;border-radius:var(--r-lg)}
.prose pre code{background:none;padding:0;color:inherit}
.prose img{border:1px solid var(--line)}
.prose hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* Two col with aside */
.layout{display:grid;grid-template-columns:1fr 300px;gap:64px;align-items:start}
@media (max-width:960px){.layout{grid-template-columns:1fr}}
.aside{position:sticky;top:160px}
.aside .box{background:var(--paper);border:1px solid var(--line);padding:26px}
.aside h4{font-family:var(--display);letter-spacing:.18em;text-transform:uppercase;font-size:12.5px;color:var(--gold-500);margin-bottom:14px}
.aside ul{list-style:none;padding:0;margin:0;font-size:14.5px}
.aside li{padding:8px 0;border-bottom:1px solid var(--line)}
.aside li:last-child{border:0}

/* Officers */
.officer{display:flex;gap:18px;align-items:center;padding:18px 0;border-bottom:1px solid var(--line)}
.officer .avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(160deg,var(--navy-700),var(--navy-900));display:grid;place-items:center;color:var(--gold-300);font-family:var(--serif);font-size:22px;flex:none}
.officer .role{font-size:12px;letter-spacing:.14em;color:var(--gold-500);text-transform:uppercase;font-family:var(--display);font-weight:700}
.officer .nm{font-weight:600;font-size:17px;color:var(--navy-800)}
.officer .cls{font-size:13px;color:var(--ink-3)}

/* Forms */
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.field label{font-size:13px;letter-spacing:.06em;color:var(--ink-2);font-weight:500}
.field input,.field textarea,.field select{font:inherit;padding:12px 14px;border:1px solid var(--line-2);background:var(--paper);border-radius:var(--r);font-size:15px;color:var(--ink);transition:border .3s}
.field input:focus,.field textarea:focus,.field select:focus{outline:0;border-color:var(--navy-800);box-shadow:0 0 0 3px rgba(11,31,58,.08)}
.field textarea{min-height:140px;resize:vertical;line-height:1.7}

/* Utilities */
.mt-0{margin-top:0}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mt-6{margin-top:48px}
.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}
.text-center{text-align:center}
.muted{color:var(--ink-3)}
.badge{display:inline-block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;padding:4px 10px;border:1px solid var(--gold-400);color:var(--gold-500);border-radius:999px;font-family:var(--display);font-weight:700}
.badge.navy{border-color:var(--navy-800);color:var(--navy-800)}
.badge.soon{border-color:var(--line-2);color:var(--ink-3)}
html.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .45s var(--ease),transform .45s var(--ease)}
html.js .reveal.in{opacity:1;transform:none}
::selection{background:var(--gold-300);color:var(--navy-900)}

/* Mobile refinements */
.brand .name{white-space:nowrap}
@media (max-width:1024px){
  .brand .name .en{display:none}
  .brand .seal{width:38px;height:38px}
  .eyebrow{letter-spacing:.18em;font-size:12px}
  .hero .container{padding-top:72px}
}
@media (max-width:480px){
  .header-actions .btn{display:none}
  .brand .name .ko{font-size:14px}
  .hero-foot{gap:18px}
}

/* Scrollbars — 본문은 가늘고 은은하게, 내부 스크롤 영역은 숨김 */
html{scrollbar-width:thin;scrollbar-color:rgba(11,31,58,.28) transparent}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(11,31,58,.22);border-radius:8px;border:2px solid transparent;background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:rgba(11,31,58,.4);background-clip:padding-box}
.subnav ul,.mobile-nav,.admin-side,.nav .sub{scrollbar-width:none;-ms-overflow-style:none}
.subnav ul::-webkit-scrollbar,.mobile-nav::-webkit-scrollbar,.admin-side::-webkit-scrollbar,.nav .sub::-webkit-scrollbar{display:none}
.subnav ul{overflow-y:hidden}
.subnav a{margin-bottom:0}
@media (max-width:760px){
  .lock{flex-wrap:wrap;padding:24px}
  .lock .btn{margin-left:0!important;width:100%;justify-content:center}
  .acct{padding:20px}
  .notice-list a{padding:14px 4px}
  .section-head{margin-bottom:24px}
  .prose table{display:block;overflow-x:auto;white-space:nowrap}
}