/* ============================================================================
   UnitOS — หน้าขาย (unitos.xyz) + หน้าสมัคร (unitos.xyz/signup)
   โทน "Ink & Ember" ชุดเดียวกับแอปและหน้า Console
   ============================================================================ */
:root {
  --ink: #242220;
  --ink-2: #4A453E;
  --muted: #726C62;
  --paper: #F7F4EE;
  --paper-2: #FFFFFF;
  --paper-3: #EFEAE0;
  --line: #DFD8CB;
  --ember: #B8503A;
  --ember-deep: #8F3A28;
  --gold: #C9A34E;
  --gold-tint: #F6ECD3;
  --ok: #2F6B4F;
  --shadow: 0 10px 30px rgba(36, 34, 32, .07);
  --radius: 12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans Thai', 'Prompt', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.65;
}

.wrap { max-width: 1000px; margin: 0 auto; padding: 0 1.1rem; }

a { color: var(--ember); }

/* ---- แถบบน ---- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(247, 244, 238, .92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; padding-block: .6rem; gap: 1rem; }
.brandmark { display: flex; align-items: center; gap: .5rem; font-family: 'Prompt', sans-serif;
  font-weight: 700; font-size: 1.05rem; letter-spacing: -.02em; text-decoration: none; color: var(--ink); }
.brandmark .dotmark { width: .68rem; height: .68rem; background: var(--ember); transform: rotate(45deg); border-radius: 2px; }
.topnav { display: flex; align-items: center; gap: 1rem; font-size: .9rem; }
.topnav a { color: var(--ink-2); text-decoration: none; }
.topnav a:hover { color: var(--ember); }
@media (max-width: 620px) { .topnav a.hide-sm { display: none; } }

/* ---- ปุ่ม ---- */
.btn {
  display: inline-block; font-family: inherit; font-size: .95rem; font-weight: 700;
  border-radius: 10px; padding: .6rem 1.2rem; border: 1px solid var(--ember);
  background: var(--ember); color: #fff; cursor: pointer; text-decoration: none;
  transition: background .15s, border-color .15s;
}
.btn:hover:not(:disabled) { background: var(--ember-deep); border-color: var(--ember-deep); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { background: var(--paper-3); }
.btn.sm { font-size: .85rem; padding: .38rem .8rem; }
:focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }

/* ---- Hero ---- */
.hero { padding: 3rem 0 2.4rem; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 2rem; align-items: center; }
@media (max-width: 820px) { .hero { padding: 2rem 0 1.6rem; } .hero .wrap { grid-template-columns: 1fr; gap: 1.5rem; } }
.hero h1 {
  margin: 0; font-family: 'Prompt', sans-serif; font-weight: 700;
  font-size: clamp(1.85rem, 4.6vw, 2.7rem); line-height: 1.2; letter-spacing: -.025em; text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--ember); }
.hero .sell { margin: .9rem 0 0; color: var(--ink-2); font-size: 1.02rem; max-width: 44ch; }
.hero .cta { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1.3rem; }
.hero .fine { margin: .7rem 0 0; color: var(--muted); font-size: .84rem; }

/* สกอร์บอร์ดใน hero */
.board { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2); overflow: hidden; box-shadow: var(--shadow); }
.board-h { display: flex; justify-content: space-between; align-items: baseline; padding: .6rem .85rem;
  border-bottom: 1px solid var(--line); background: var(--paper-3); }
.board-h b { font-size: .85rem; font-family: 'Prompt', sans-serif; }
.board-h span { font-size: .73rem; color: var(--muted); }
.board ol { list-style: none; margin: 0; padding: .35rem 0; }
.board li { display: grid; grid-template-columns: 1.5rem 1fr auto; gap: .6rem; align-items: center;
  padding: .36rem .85rem; font-size: .88rem; }
.board li .rk { font-variant-numeric: tabular-nums; font-size: .8rem; color: var(--muted); }
.board li .amt { font-variant-numeric: tabular-nums; font-weight: 700; }
.board li.top { background: var(--gold-tint); }
.board li.top .rk { color: var(--gold); font-weight: 800; }
.board .barline { height: 3px; border-radius: 2px; background: var(--ember); opacity: .72; margin-top: .2rem; }

/* ---- ส่วนทั่วไป ---- */
section { padding: 2.6rem 0; border-top: 1px solid var(--line); }
@media (max-width: 620px) { section { padding: 2rem 0; } }
.seclabel { font-size: .69rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--ember); }
section h2 { margin: .35rem 0 0; font-family: 'Prompt', sans-serif; font-size: 1.4rem; letter-spacing: -.02em; text-wrap: balance; }
section .lead { margin: .4rem 0 0; color: var(--muted); max-width: 60ch; }
.grid { display: grid; gap: .85rem; margin-top: 1.4rem; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 820px) { .grid.c3, .grid.c2 { grid-template-columns: 1fr; } }

.card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2); padding: .95rem 1.05rem; }
.pain q { display: block; font-style: italic; font-size: .98rem; }
.pain p { margin: .55rem 0 0; font-size: .87rem; color: var(--muted); }

.feat { display: flex; gap: .75rem; align-items: flex-start; }
.feat .ic { font-size: 1.3rem; line-height: 1.25; }
.feat b { display: block; font-size: .96rem; font-family: 'Prompt', sans-serif; }
.feat span { font-size: .86rem; color: var(--muted); }

/* ---- สวิตช์รอบชำระ ---- */
.billtoggle { display: flex; width: fit-content; margin-top: 1.2rem; border: 1px solid var(--line);
  border-radius: 99px; background: var(--paper-2); padding: .18rem; gap: .18rem; }
.bt-opt {
  font-family: inherit; font-size: .88rem; font-weight: 600; cursor: pointer;
  border: 0; background: transparent; color: var(--ink-2);
  border-radius: 99px; padding: .34rem .95rem; transition: background .15s, color .15s;
}
.bt-opt.active { background: var(--ember); color: #fff; }
.bt-opt .save-tag { font-size: .72rem; font-weight: 800; opacity: .9; }
.save-line { display: block; font-size: .78rem; color: var(--ok); font-weight: 700; }

/* ---- ราคา ---- */
.price { display: grid; gap: .35rem; align-content: start; position: relative; }
.price.best { border-color: var(--ember); box-shadow: 0 0 0 3px rgba(184, 80, 58, .12); }
.price.best::after {
  content: "นิยมที่สุด"; position: absolute; top: -.65rem; left: 1rem;
  background: var(--ember); color: #fff; font-size: .68rem; font-weight: 800;
  padding: .12rem .55rem; border-radius: 99px; letter-spacing: .04em;
}
.price .tier { font-size: .74rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.price .amt { font-family: 'Prompt', sans-serif; font-size: 1.85rem; font-weight: 700;
  letter-spacing: -.03em; font-variant-numeric: tabular-nums; line-height: 1.2; }
.price .amt small { font-size: .8rem; font-weight: 400; color: var(--muted); letter-spacing: 0; }
.price ul { list-style: none; margin: .5rem 0 .8rem; padding: 0; display: grid; gap: .25rem; font-size: .88rem; color: var(--ink-2); }
.price li::before { content: "✓ "; color: var(--ok); font-weight: 700; }

/* ---- ปิดท้าย ---- */
.closing { text-align: center; }
.closing .btn { margin-top: 1rem; }
footer { border-top: 1px solid var(--line); padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: .85rem; }
footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---- ฟอร์มสมัคร ---- */
.signup-page { padding: 2.2rem 0 3rem; }
.signup-card { max-width: 34rem; margin: 0 auto; background: var(--paper-2); border: 1px solid var(--line);
  border-radius: 14px; box-shadow: var(--shadow); padding: 1.4rem 1.5rem 1.6rem; }
@media (max-width: 560px) { .signup-card { padding: 1.1rem; } }
.signup-card h1 { margin: 0; font-family: 'Prompt', sans-serif; font-size: 1.35rem; letter-spacing: -.02em; }
.signup-card .lead { margin: .3rem 0 1.1rem; color: var(--muted); font-size: .9rem; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }
@media (max-width: 560px) { .fields { grid-template-columns: 1fr; } }
.f { display: grid; gap: .22rem; }
.f.full { grid-column: 1 / -1; }
.f label { font-size: .78rem; font-weight: 700; color: var(--muted); }
.f input, .f select {
  font-family: inherit; font-size: .95rem; color: var(--ink); width: 100%;
  border: 1px solid var(--line); border-radius: 9px; padding: .5rem .7rem; background: var(--paper-2);
}
.f .hint { font-size: .76rem; color: var(--muted); }
.f .suffix { display: flex; }
.f .suffix input { border-radius: 9px 0 0 9px; border-right: 0; }
.f .suffix .tail { border: 1px solid var(--line); border-left: 0; border-radius: 0 9px 9px 0;
  padding: .5rem .65rem; background: var(--paper-3); color: var(--muted); font-size: .9rem;
  display: flex; align-items: center; white-space: nowrap; }
.f .state { font-size: .78rem; }
.f .state.ok { color: var(--ok); }
.f .state.bad { color: var(--ember-deep); }
.msg { border-radius: 9px; padding: .55rem .8rem; font-size: .89rem; margin-top: .9rem; }
.msg.err { background: #F8E3DF; color: #A82F1E; }
.signup-actions { margin-top: 1.1rem; display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.signup-actions .note { font-size: .8rem; color: var(--muted); }

/* ---- หน้าสำเร็จ ---- */
.done { text-align: center; display: grid; gap: .55rem; justify-items: center; }
.done .big { font-size: 2.6rem; }
.done h1 { margin: 0; font-family: 'Prompt', sans-serif; font-size: 1.35rem; }
.done .link { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 1rem;
  background: var(--gold-tint); border: 1px solid var(--line); border-radius: 9px; padding: .45rem .9rem; }
.done ol { text-align: left; margin: .7rem 0 0; padding-left: 1.2rem; color: var(--ink-2);
  font-size: .9rem; display: grid; gap: .28rem; }
.done .codebox { background: var(--paper-3); border-radius: 8px; padding: .5rem .8rem; font-size: .88rem; }