:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#2b8a3e; /* 생일 초록 */
  --accent-soft:#e3f1e5;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:calc(100vh - 48px);display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.home{font-size:13px;color:var(--ink-2);text-decoration:none}
.home:hover{color:var(--ink)}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer;flex-shrink:0}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.text-input{height:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:14px;color:var(--ink);min-width:0}
.text-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

.wrap{width:100%;max-width:1040px;margin:0 auto;padding:32px 28px 64px;display:flex;flex-direction:column;gap:24px}

/* ---------- Inputs ---------- */
.inputs{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:20px 22px}
.field{display:flex;flex-direction:column;gap:8px;min-width:0}
.field label{font-size:13px;color:var(--ink-2);display:flex;align-items:baseline;gap:8px}
.row{display:flex;gap:8px;align-items:center}
.row .text-input{flex:1}
.big-input{height:52px;font-family:var(--mono);font-size:18px;border-radius:12px;width:100%}
.field--birth .big-input{border-color:var(--accent);background:#fff}
.error{margin:0;padding:12px 16px;border-radius:12px;background:#fdecec;color:#b42318;font-size:14px}

/* ---------- Result ---------- */
.result{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:24px;align-items:stretch}
.result.is-empty{opacity:.35;pointer-events:none}
.hero{background:var(--ink);color:#fff;border-radius:22px;padding:28px 24px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 40%,rgba(43,138,62,.35),transparent 65%)}
.ring{position:relative;width:min(100%,280px);aspect-ratio:1}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-track{fill:none;stroke:rgba(255,255,255,.1);stroke-width:10}
.ring-fill{fill:none;stroke:#69db7c;stroke-width:10;stroke-linecap:round;stroke-dasharray:553;stroke-dashoffset:553;transition:stroke-dashoffset .8s cubic-bezier(.3,.8,.3,1)}
.ring-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-align:center}
.ring-center .mono-label{color:#a9e3b2}
.age-num{font-family:var(--mono);font-weight:500;font-size:96px;line-height:1;letter-spacing:-.05em}
.age-num small{font-family:var(--font);font-size:22px;font-weight:500;letter-spacing:0;margin-left:4px}
.age-sub{font-size:14px;color:#cfccc3;margin-top:6px}
.hero-note{margin:0;font-size:13px;color:#cfccc3;text-align:center;position:relative;line-height:1.6}
.hero-note b{color:#fff}

.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px 18px;display:flex;flex-direction:column;gap:6px;min-width:0;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(40,36,28,.08)}
.card--wide{grid-column:span 1}
.card-k{font-size:12px;color:var(--sub)}
.card-v{font-family:var(--mono);font-size:34px;font-weight:500;letter-spacing:-.03em;line-height:1.15;overflow-wrap:anywhere}
.card-v small{font-family:var(--font);font-size:15px;letter-spacing:0;margin-left:4px;color:var(--ink-2)}
.card-v--text{font-family:var(--font);font-size:26px;font-weight:700;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.emoji{font-size:30px;line-height:1}
.sym{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:20px;font-family:"Segoe UI Symbol","Noto Sans Symbols","Apple Symbols",sans-serif}
.card-d{font-size:12px;line-height:1.55;color:var(--muted)}
.card-d b{color:var(--ink-2);font-weight:500}
.card-d .warn{color:#b45309}
.card--accent{background:var(--accent);border-color:var(--accent);color:#fff}
.card--accent .card-k,.card--accent .card-d,.card--accent .card-d b{color:rgba(255,255,255,.85)}
.card--accent.is-today{background:linear-gradient(135deg,#2b8a3e,#f59f00)}
.reveal{animation:reveal .45s ease both}
.cards .reveal:nth-child(2){animation-delay:.04s}.cards .reveal:nth-child(3){animation-delay:.08s}
.cards .reveal:nth-child(4){animation-delay:.12s}.cards .reveal:nth-child(5){animation-delay:.16s}.cards .reveal:nth-child(6){animation-delay:.2s}
@keyframes reveal{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.footnote{margin:0;font-size:12px;line-height:1.7;color:var(--muted)}

@media (max-width:860px){
  .result{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:16px 16px 48px;gap:16px}
  .inputs{grid-template-columns:minmax(0,1fr);padding:16px}
  .cards{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}
  .card{padding:14px}
  .card--wide{grid-column:1/-1}
  .card-v{font-size:28px}
  .card-v--text{font-size:20px;gap:8px}
  .age-num{font-size:80px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141513; --surface:#1a1b19; --panel:#1f201e; --panel-soft:#252623;
    --ink:#eceae5; --ink-hover:#ffffff; --ink-2:#c8c6bf; --sub:#a09e96; --muted:#8a8880;
    --line:#2f302c; --line-2:#3a3b36; --line-3:#292a26; --hover:#2b2c28; --soft:#272824; --track:#353631;
    --accent:#5fc474; --accent-soft:rgba(95,196,116,.15);
  }
  :root[data-theme="dark"] .btn--solid{color:var(--bg)}
  :root[data-theme="dark"] .field--birth .big-input{background:var(--surface)}
  :root[data-theme="dark"] .error{background:rgba(240,90,80,.14);color:#f59a90}
  /* 원래 어두운 나이 판: 배경과 구분되게 한 단계 띄우고 테두리 */
  :root[data-theme="dark"] .hero{background:#1b211c;color:#fff;border:1px solid #2b3a2e}
  :root[data-theme="dark"] .card:hover{box-shadow:0 10px 24px rgba(0,0,0,.35)}
  :root[data-theme="dark"] .card-d .warn{color:#f0a64a}
  :root[data-theme="dark"] .card--accent{background:#2b7d3b;border-color:#2b7d3b}
}