:root {
  --bg: #0b0d12;
  --panel: #141821;
  --panel-2: #1a1f2b;
  --line: #262c3a;
  --text: #e8ebf0;
  --muted: #8a93a6;
  --accent: #4f8cff;
  --ok: #6ee7b7;
  --err: #ff7b7b;
  --dev: #ffc46b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(800px 460px at 20% -10%, rgba(79, 140, 255, .13), transparent 62%),
    radial-gradient(600px 360px at 90% 10%, rgba(110, 231, 183, .06), transparent 58%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 18px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 30px 26px 26px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .45);
}

.auth-head { margin-bottom: 22px; }
.auth-head .logo {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: .5px;
}
.auth-head h1 { font-size: 23px; margin: 10px 0 6px; font-weight: 650; letter-spacing: -.3px; }
.auth-head p { margin: 0; color: var(--muted); font-size: 13px; }

form { display: flex; flex-direction: column; gap: 14px; }

label { display: flex; flex-direction: column; gap: 7px; }
label > span { font-size: 12.5px; color: var(--muted); }

input[type="text"],
input[type="email"],
input[type="password"] {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 15px;   /* 16px 以下 iOS 会缩放，15 配合 meta 尚可，实际用 16 更稳 */
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color .15s, background .15s;
  width: 100%;
}
input:focus { border-color: var(--accent); background: #1c2230; }
input::placeholder { color: #545d70; }

.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.cap-row { display: flex; gap: 10px; align-items: stretch; }
.cap-row input { flex: 1; }
.cap {
  width: 132px;
  height: 48px;
  border-radius: 10px;
  border: 1px solid var(--line);
  cursor: pointer;
  object-fit: cover;
  flex-shrink: 0;
}

.btn {
  display: block;
  text-align: center;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 550;
  cursor: pointer;
  text-decoration: none;
  margin-top: 4px;
  transition: filter .15s, transform .06s;
  font-family: inherit;
}
.btn:hover { filter: brightness(1.1); }
.btn:active { transform: translateY(1px); }
.btn.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.alert {
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 13px;
  margin-bottom: 16px;
  line-height: 1.6;
}
.alert.err { background: rgba(255, 123, 123, .1); border: 1px solid rgba(255, 123, 123, .28); color: #ffa8a8; }
.alert.ok  { background: rgba(110, 231, 183, .09); border: 1px solid rgba(110, 231, 183, .26); color: #9af0cd; }
.alert.dev { background: rgba(255, 196, 107, .09); border: 1px solid rgba(255, 196, 107, .28); color: #ffd79a; }
.alert code {
  background: rgba(0, 0, 0, .3);
  padding: 2px 8px;
  border-radius: 5px;
  font-size: 14px;
  letter-spacing: 2px;
  font-weight: 600;
  color: #fff;
}

.auth-foot {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--muted);
}
.auth-foot a { color: var(--muted); text-decoration: none; }
.auth-foot a:hover { color: var(--accent); }

@media (max-width: 380px) {
  .two { grid-template-columns: 1fr; }
  .cap { width: 110px; }
}