* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #07c160;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --white: #fff;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
}

.nav-actions { display: flex; gap: 12px; align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: opacity .2s;
}

.btn:hover { opacity: .88; }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
}

.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 48px 24px 32px;
  margin-top: 80px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}

.footer-inner h4 {
  color: #f1f5f9;
  font-size: 14px;
  margin-bottom: 12px;
}

.footer-inner p, .footer-inner li {
  font-size: 13px;
  line-height: 1.8;
}

.footer-inner ul { list-style: none; }

.footer-bottom {
  max-width: 1100px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid #334155;
  font-size: 12px;
  text-align: center;
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; }
}

.auth-page {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  background: linear-gradient(160deg, #eff6ff 0%, #f8fafc 50%, #f0fdf4 100%);
}

.auth-card {
  background: var(--white);
  border-radius: 16px;
  padding: 40px 32px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 4px 24px rgba(15,23,42,.08);
  border: 1px solid var(--border);
}

.auth-card h1 { font-size: 22px; margin-bottom: 6px; }
.auth-card .sub { color: var(--muted); font-size: 14px; margin-bottom: 28px; }

.auth-card label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.auth-card input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 12px;
  font-size: 15px;
  margin-bottom: 16px;
}

.auth-card input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.auth-card .btn { width: 100%; height: 44px; font-size: 16px; margin-top: 4px; }

.auth-link {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--primary);
}

.msg { margin-top: 12px; font-size: 13px; text-align: center; }
.msg.err { color: #dc2626; }