/* SPNI-X registration form — โทน SPNI-Link (น้ำเงิน–ฟ้า) mobile-first */
:root {
  --bg0: #080E1A; --bg1: #0E1B33; --bg2: #132A4D;
  --panel: rgba(13, 27, 51, 0.78);
  --line: rgba(56, 189, 248, 0.22); --line-on: rgba(56, 189, 248, 0.55);
  --cyan: #38BDF8; --blue: #3B82F6;
  --text: #F1F5F9; --sub: #CBD5E1; --meta: #94A3B8;
  --danger: #F87171; --ok: #4ADE80; --warn: #FBBF24; --line-green: #06C755;
  --field: rgba(8, 18, 36, 0.72);
  --radius: 12px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }   /* กัน .btn/.card ที่ตั้ง display เอง ไปทับ attribute hidden */
html { color-scheme: dark; }
body {
  margin: 0; min-height: 100vh; color: var(--text);
  font-family: Sarabun, "Noto Sans Thai", "Sukhumvit Set", system-ui, sans-serif;
  font-size: 16px; line-height: 1.5;
  background:
    radial-gradient(1200px 620px at 22% 0%, var(--bg2) 0%, transparent 62%),
    radial-gradient(900px 520px at 84% 100%, #10305A 0%, transparent 60%),
    linear-gradient(140deg, var(--bg0) 0%, var(--bg1) 55%, var(--bg0) 100%);
  background-attachment: fixed;
}
.wrap { max-width: 560px; margin: 0 auto; padding: 20px 16px 48px; padding-bottom: calc(48px + env(safe-area-inset-bottom)); }

/* ── header ── */
.brand { display: flex; gap: 14px; align-items: center; margin: 4px 0 18px; }
.brand-logo { width: 72px; height: 72px; flex: none; filter: drop-shadow(0 0 10px rgba(56,189,248,.45)); }
.eyebrow { font-size: 11px; letter-spacing: 2.2px; color: var(--cyan); font-weight: 600; }
h1 { margin: 2px 0 0; font-size: 24px; font-weight: 700; letter-spacing: .2px; }
.sub { margin: 2px 0 0; color: var(--sub); font-size: 14px; }

/* ── cards ── */
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 18px 16px; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .35);
}
.state { text-align: center; padding: 36px 20px; }
.state h2 { margin: 12px 0 6px; font-size: 22px; }
.state p { color: var(--sub); margin: 0 0 18px; }
.state-icon {
  width: 56px; height: 56px; margin: 0 auto; border-radius: 50%; display: grid; place-items: center;
  font-size: 28px; font-weight: 700;
}
.state-icon.ok { background: rgba(74, 222, 128, .15); color: var(--ok); border: 1px solid rgba(74,222,128,.5); }
.state-icon.warn { background: rgba(251, 191, 36, .15); color: var(--warn); border: 1px solid rgba(251,191,36,.5); }
.spinner {
  width: 36px; height: 36px; margin: 0 auto 12px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--cyan); animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── form ── */
fieldset { border: 0; padding: 0; margin: 0 0 22px; min-width: 0; }
legend {
  font-weight: 700; font-size: 16px; color: var(--text); padding: 0; margin-bottom: 12px;
  display: flex; align-items: center; gap: 10px;
}
.num {
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--cyan), var(--blue)); color: #052E4D; font-size: 13px; font-weight: 700;
}
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; letter-spacing: .4px; color: var(--sub); font-weight: 600; margin-bottom: 6px; }
.req { color: var(--danger); }
input[type="text"], input[type="tel"], input[type="password"], input[type="search"], select {
  width: 100%; min-height: 48px; padding: 10px 12px; font: inherit; font-size: 16px; color: var(--text);
  background: var(--field); border: 1px solid var(--line); border-radius: var(--radius); outline: none;
  -webkit-appearance: none; appearance: none;
}
select {
  background-image: linear-gradient(45deg, transparent 50%, var(--cyan) 50%), linear-gradient(135deg, var(--cyan) 50%, transparent 50%);
  background-position: calc(100% - 20px) 21px, calc(100% - 14px) 21px; background-size: 6px 6px; background-repeat: no-repeat;
  padding-right: 36px;
}
select:disabled { opacity: .45; }
input::placeholder { color: #64748B; }
input:focus, select:focus { border-color: var(--line-on); box-shadow: 0 0 0 3px rgba(56,189,248,.18); }
input[aria-invalid="true"], select[aria-invalid="true"] { border-color: var(--danger); }
input[type="search"] { margin-bottom: 8px; }
.hint { margin: 6px 0 0; font-size: 13px; color: var(--meta); }
.grid-rank { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: end; margin-bottom: 14px; }
.grid-rank .field { margin: 0; }
.check { display: flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 12px; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--field); color: var(--sub); font-weight: 600; cursor: pointer; user-select: none; }
.check input { width: 20px; height: 20px; accent-color: var(--cyan); margin: 0; }
.check input:disabled + span { opacity: .4; }
.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 68px; }
.pw-toggle {
  position: absolute; right: 8px; top: 50%; transform: translateY(-50%); height: 32px; padding: 0 10px;
  font: inherit; font-size: 13px; font-weight: 600; color: var(--cyan); background: rgba(56,189,248,.12);
  border: 1px solid var(--line); border-radius: 8px; cursor: pointer;
}

/* ── auto-fill note / alerts ── */
.note {
  margin: 0 0 12px; padding: 10px 12px; border-radius: 10px; font-size: 14px; line-height: 1.45;
  background: rgba(56,189,248,.10); border: 1px solid var(--line-on); color: #BAE6FD;
}
.alert {
  margin: 0 0 16px; padding: 12px 14px; border-radius: 10px; font-size: 14px;
  background: rgba(248,113,113,.12); border: 1px solid rgba(248,113,113,.55); color: #FECACA;
}
.alert:focus { outline: 2px solid rgba(248,113,113,.6); }

/* ── image drop zone ── */
.drop {
  border: 1.5px dashed var(--line-on); border-radius: 14px; padding: 18px 12px; text-align: center;
  background: rgba(56,189,248,.05); cursor: pointer; min-height: 120px; display: grid; place-items: center; gap: 10px;
}
.drop:focus { outline: none; box-shadow: 0 0 0 3px rgba(56,189,248,.18); }
.drop.has-image { border-style: solid; }
.drop-text { color: var(--sub); font-size: 15px; }
.thumb { max-width: 100%; max-height: 260px; border-radius: 10px; box-shadow: 0 8px 24px rgba(0,0,0,.4); }

/* ── buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; width: 100%; min-height: 50px; padding: 0 18px;
  font: inherit; font-size: 17px; font-weight: 700; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; transition: filter .15s ease, transform .05s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: linear-gradient(135deg, var(--cyan), var(--blue)); color: #041428; box-shadow: 0 10px 26px rgba(59,130,246,.35); }
.btn-primary:disabled { filter: grayscale(.4) brightness(.7); cursor: not-allowed; box-shadow: none; }
.btn-line { background: var(--line-green); color: #fff; }
.btn-ghost { background: transparent; color: var(--cyan); border-color: var(--line-on); min-height: 42px; font-size: 15px; margin-top: 10px; }
.consent { font-size: 13px; color: var(--meta); text-align: center; margin: 4px 0 14px; }
.foot { text-align: center; font-size: 12px; color: #64748B; margin-top: 22px; }

@media (min-width: 480px) {
  .wrap { padding: 28px 20px 56px; }
  .card { padding: 22px 22px; }
}
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }