:root {
  --bg: #f5f1ea;
  --surface: rgba(255, 253, 248, .78);
  --ink: #2f2a25;
  --muted: #80766c;
  --line: rgba(88, 73, 58, .15);
  --accent: #7d514b;
  --accent-dark: #63413c;
  --shadow: 0 24px 70px rgba(54, 43, 34, .13);
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", sans-serif;
  background:
    radial-gradient(circle at 50% -10%, rgba(255,255,255,.95), transparent 38%),
    radial-gradient(circle at 18% 20%, rgba(226, 206, 193, .55), transparent 34%),
    radial-gradient(circle at 84% 82%, rgba(217, 198, 180, .44), transparent 36%),
    var(--bg);
}
.login-shell {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 18px max(28px, env(safe-area-inset-bottom));
}
.login-card {
  width: min(430px, 100%);
  padding: 28px 22px 22px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 32px;
  background: var(--surface);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.72);
  backdrop-filter: blur(24px) saturate(1.18);
  -webkit-backdrop-filter: blur(24px) saturate(1.18);
}
.login-icon {
  display: block;
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  filter: drop-shadow(0 10px 18px rgba(90, 68, 54, .12));
}
.eyebrow {
  margin: 0 0 8px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .08em;
}
h1 {
  margin: 0;
  text-align: center;
  font-size: clamp(27px, 7vw, 34px);
  letter-spacing: -.04em;
}
.hint {
  margin: 12px auto 22px;
  max-width: 21em;
  color: var(--muted);
  text-align: center;
  line-height: 1.65;
  font-size: 14px;
}
form { display: grid; gap: 10px; }
label { color: var(--muted); font-size: 13px; padding-left: 4px; }
input, button {
  width: 100%;
  min-height: 48px;
  border-radius: 18px;
  font: inherit;
}
input {
  border: 1px solid var(--line);
  background: rgba(255,255,255,.66);
  color: var(--ink);
  padding: 0 15px;
  outline: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.55);
}
input:focus {
  border-color: rgba(125, 81, 75, .48);
  box-shadow: 0 0 0 4px rgba(125, 81, 75, .11), inset 0 1px 0 rgba(255,255,255,.55);
}
button {
  margin-top: 6px;
  border: 0;
  color: #fffaf6;
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
  box-shadow: 0 14px 28px rgba(95, 61, 56, .22);
  font-weight: 650;
}
button:disabled { opacity: .62; }
.message {
  min-height: 22px;
  margin: 14px 0 0;
  color: var(--accent-dark);
  text-align: center;
  font-size: 14px;
}
.footnote {
  margin: 16px 0 0;
  color: var(--muted);
  text-align: center;
  line-height: 1.55;
  font-size: 12px;
}
code {
  padding: 1px 5px;
  border-radius: 7px;
  background: rgba(255,255,255,.58);
}