:root {
  --teal: #079c9b;
  --teal-dark: #057574;
  --ink: #0f2a2a;
  --muted: #5a6b6b;
  --line: #d9e6e4;
  --bg: #f4faf9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1100px 540px at 12% -8%, #e3f5f3 0%, rgba(227, 245, 243, 0) 60%),
    radial-gradient(900px 480px at 108% 8%, #e9f0ff 0%, rgba(233, 240, 255, 0) 55%),
    var(--bg);
  min-height: 100vh;
}

/* ---------- Auth ---------- */
.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 48px 20px;
  position: relative;
}

.auth-back {
  position: absolute;
  top: 24px;
  left: 28px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}
.auth-back:hover { color: var(--teal-dark); }

.auth-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 36px 34px;
  box-shadow: 0 24px 70px rgba(7, 80, 79, 0.12);
}

.auth-brand { display: inline-flex; }
.auth-brand img { height: 30px; }

.auth-card h1 {
  font-size: 24px;
  margin: 18px 0 6px;
}

.auth-sub {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.sso-group { display: grid; gap: 10px; }

.sso-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.sso-btn:hover { border-color: var(--teal); background: #f6fbfb; }
.sso-btn[data-disabled="1"] { opacity: .55; }

.sso-icon { width: 18px; height: 18px; border-radius: 4px; flex: 0 0 18px; background-size: contain; }
.sso-google { background: conic-gradient(from -45deg, #ea4335 0 25%, #fbbc05 0 50%, #34a853 0 75%, #4285f4 0 100%); }
.sso-apple { background: #111; }
.sso-lark { background: linear-gradient(135deg, #00d6b9, #3370ff); }

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: #97a6a6;
  font-size: 12px;
}
.auth-divider::before, .auth-divider::after {
  content: "";
  height: 1px;
  background: var(--line);
  flex: 1;
}

.auth-form { display: grid; gap: 14px; }
.field { display: grid; gap: 6px; }
.field[hidden] { display: none; }
.field > span { font-size: 13px; color: var(--muted); font-weight: 600; }
.field input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(7, 156, 155, .15); }

.auth-submit {
  margin-top: 4px;
  padding: 12px 14px;
  border: none;
  border-radius: 10px;
  background: var(--teal);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
}
.auth-submit:hover { background: var(--teal-dark); }
.auth-submit:disabled { opacity: .6; cursor: progress; }

.auth-switch { margin: 18px 0 0; text-align: center; font-size: 14px; color: var(--muted); }
.auth-switch a { color: var(--teal-dark); font-weight: 700; text-decoration: none; }

.auth-msg { margin-top: 14px; font-size: 13px; min-height: 18px; text-align: center; }
.auth-msg.error { color: #c0392b; }
.auth-msg.success { color: var(--teal-dark); }

.admin-badge {
  display: inline-block;
  margin: 14px 0 0;
  padding: 4px 10px;
  background: #0f2a2a;
  color: #b8f1ef;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
}
.auth-admin .auth-card { border-color: #0f2a2a22; }

/* ---------- Docs ---------- */
.docs-body { background: #fff; }
.docs-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px clamp(20px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(8px);
}
.docs-brand img { height: 26px; }
.docs-nav { display: flex; gap: 18px; }
.docs-nav a { color: var(--ink); text-decoration: none; font-weight: 600; font-size: 14px; }
.docs-nav a:hover { color: var(--teal-dark); }

.docs-main { max-width: 880px; margin: 0 auto; padding: 40px clamp(20px, 6vw, 40px) 80px; }
.docs-main h1 { font-size: 32px; margin: 0 0 10px; }
.docs-main h2 { font-size: 18px; margin: 36px 0 12px; }
.docs-lead { color: var(--muted); line-height: 1.7; }
.docs-main code { background: #eef5f4; padding: 2px 6px; border-radius: 5px; font-size: 13px; }

.docs-table { width: 100%; border-collapse: collapse; margin-top: 6px; }
.docs-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 14px; }
.docs-table td:first-child { width: 64px; }
.docs-table td:nth-child(2) { width: 36%; }

.m { display: inline-block; padding: 2px 8px; border-radius: 6px; font-size: 12px; font-weight: 700; color: #fff; }
.m-get { background: #2f9e63; }
.m-post { background: #2b6cb0; }

.docs-code {
  background: #0f2a2a;
  color: #c8f5f2;
  padding: 18px;
  border-radius: 12px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}