/* ============================================================
   Linger · 素笺朱墨 — UI v3 "missive"
   Le Labo's restraint, reread as correspondence.
   Cool ink on plain paper. Script + brush + Garamond. No lab chrome.
============================================================ */
:root{
  /* ink on paper — cool, plain, NOT warm beige/orange */
  --paper:#F2F3EF;          /* plain near-white, faintly cool */
  --paper-2:#E9EBE5;
  --card:#FAFBF7;
  --ink:#1B2330;            /* deep blue-black — fountain-pen ink */
  --ink-2:#4F5765;          /* cool slate */
  --ink-3:#8B919C;          /* cool grey */
  --ink-4:#BDC1C7;
  --line:rgba(27,35,48,.13);
  --line-2:rgba(27,35,48,.07);
  --seal:#8C2E2C;           /* deep crimson 朱 — a whisper, used rarely */

  --script:'Italianno',cursive;
  --serif:'Cormorant Garamond',Georgia,serif;
  --brush:'LXGW WenKai Screen','LXGW WenKai',serif;   /* refined, light — not a heavy brush */
  --hand:'LXGW WenKai Screen','LXGW WenKai',serif;

  /* aliases so existing page CSS picks up the new voices */
  --disp:var(--brush);
  --sans:var(--hand);
  --mono:var(--serif);
  --accent:var(--seal);
}
*{margin:0;padding:0;box-sizing:border-box}
*:focus-visible{outline:1.5px solid var(--ink);outline-offset:2px}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scrollbar-gutter:stable}
body{
  font-family:'Cormorant Garamond','LXGW WenKai Screen','LXGW WenKai',serif;
  font-weight:400;color:var(--ink);background:var(--paper);
  -webkit-font-smoothing:antialiased;line-height:1.65;font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit}

/* ---------- type primitives ---------- */
.label{font-family:var(--serif);font-style:italic;font-weight:500;font-size:14px;letter-spacing:.04em;color:var(--ink-3)}
.disp{font-family:var(--brush);font-weight:400;line-height:1.12;letter-spacing:.02em}
.script{font-family:var(--script);font-weight:400}
.hr{height:1px;background:var(--line);border:0}

/* ---------- nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;justify-content:space-between;align-items:center;
  padding:0 clamp(18px,4vw,44px);height:64px;
  background:rgba(242,243,239,.9);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav .brand{display:flex;align-items:baseline;gap:12px;text-decoration:none}
.nav .brand .mark{font-family:var(--script);font-size:34px;line-height:.8;color:var(--ink);letter-spacing:.01em}
.nav .brand .cn{font-family:var(--hand);font-size:14px;color:var(--ink-3);letter-spacing:.18em}
.nav .menu{display:flex;gap:clamp(16px,2.6vw,32px);align-items:center}
.nav .menu a{
  font-family:var(--serif);font-size:16px;font-weight:500;letter-spacing:.03em;
  color:var(--ink-3);text-decoration:none;transition:color .25s;padding:4px 0;position:relative;white-space:nowrap;
}
.nav .menu a:hover,.nav .menu a.on{color:var(--ink)}
.nav .menu a.on::after{content:'';position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--seal)}
@media(max-width:560px){.nav .brand .cn{display:none}.nav .menu{gap:16px}.nav .menu a{font-size:15px}}

main{padding-top:64px}

/* ---------- buttons (restrained, elegant — no mono caps) ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--serif);font-size:16px;font-weight:600;letter-spacing:.04em;
  background:var(--ink);color:var(--paper);border:1px solid var(--ink);
  padding:13px 30px;cursor:pointer;transition:background .25s,color .25s;
  text-decoration:none;border-radius:0;min-height:46px;line-height:1;
}
.btn:hover{background:transparent;color:var(--ink)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn--ghost:hover{background:var(--ink);color:var(--paper)}
.btn--link{background:none;border:none;color:var(--ink-2);padding:8px 2px;min-height:auto;font-style:italic}
.btn--link:hover{background:none;color:var(--seal)}

/* ---------- meta row (replaces lab spec-bar): airy, serif, hairline ---------- */
.spec{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 30px;
  padding:18px 8px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.spec > div{display:flex;align-items:baseline;gap:8px;border:none;padding:0;
  font-family:var(--serif);font-style:italic;font-size:14px;color:var(--ink-3);letter-spacing:.02em}
.spec > div b{font-style:normal;font-weight:600;color:var(--ink);font-family:var(--hand);font-size:15px}

/* ---------- form controls ---------- */
.field{display:flex;flex-direction:column;gap:8px}
.field > label{font-family:var(--serif);font-style:italic;font-size:14px;color:var(--ink-3)}
.input,.select{
  font-family:var(--hand);font-size:16px;color:var(--ink);
  background:transparent;border:1px solid var(--line);padding:12px 14px;border-radius:0;outline:none;width:100%;transition:border-color .25s;
}
.input:focus,.select:focus{border-color:var(--ink)}
.input::placeholder{color:var(--ink-4)}
.select{font-family:var(--serif);font-size:15px;cursor:pointer;-webkit-appearance:none;appearance:none}

.switch{width:42px;height:24px;border:1px solid var(--ink);background:transparent;position:relative;cursor:pointer;transition:background .25s;flex-shrink:0}
.switch::after{content:'';position:absolute;top:2px;left:2px;width:16px;height:16px;background:var(--ink);transition:transform .25s,background .25s}
.switch.on{background:var(--ink)}
.switch.on::after{transform:translateX(18px);background:var(--paper)}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(16px);
  background:var(--ink);color:var(--paper);padding:12px 24px;
  font-family:var(--serif);font-style:italic;font-size:16px;letter-spacing:.02em;z-index:200;
  opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;border-radius:0}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- page shell ---------- */
.wrap{max-width:1120px;margin:0 auto;padding:0 clamp(18px,5vw,56px)}
.page{padding:64px 0 110px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;margin-bottom:14px}
.page-head h1{font-family:var(--brush);font-weight:400;font-size:clamp(46px,8vw,92px);line-height:1.05;letter-spacing:.03em}
.page-head h1 em{color:var(--seal);font-style:normal}
.page-head .sub{font-family:var(--serif);font-style:italic;font-size:18px;color:var(--ink-3);max-width:300px;text-align:right;line-height:1.5}

@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}