/* 商户后台登录页 — 独立于平台 /admin */
.merchant-login-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: #f1f5f9;
}

.merchant-login-hero {
  position: relative;
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: #fff;
  background: linear-gradient(145deg, #0f766e 0%, #14b8a6 45%, #2dd4bf 100%);
  overflow: hidden;
}

.merchant-login-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.merchant-login-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 400px;
}

.merchant-login-hero__badge {
  display: inline-block;
  margin-bottom: 20px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.merchant-login-hero h1 {
  margin: 0 0 14px;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
}

.merchant-login-hero p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  opacity: 0.92;
}

.merchant-login-hero__features {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.merchant-login-hero__features li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.875rem;
  opacity: 0.9;
}

.merchant-login-hero__features li::before {
  content: "✓";
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 700;
}

.merchant-login-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
}

.merchant-login-card {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 12px;
  padding: 40px 36px 32px;
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  border: 1px solid #e2e8f0;
}

.merchant-login-card__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 24px;
  gap: 12px;
}

.merchant-login-card__logo {
  max-width: 180px;
  max-height: 72px;
  object-fit: contain;
}

.merchant-login-card__logo.is-hidden {
  display: none;
}

.merchant-login-card__logo-placeholder {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
}

.merchant-login-card__logo-placeholder.is-hidden {
  display: none;
}

.merchant-login-card__title {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 700;
  color: #0f172a;
}

.merchant-login-card__sub {
  margin: 0 0 24px;
  text-align: center;
  font-size: 0.875rem;
  color: #64748b;
}

.merchant-login-field {
  margin-bottom: 18px;
}

.merchant-login-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #475569;
}

.merchant-login-field input {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: #0f172a;
  box-sizing: border-box;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.merchant-login-field input:focus {
  outline: none;
  border-color: #14b8a6;
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.2);
}

.merchant-login-btn {
  width: 100%;
  height: 44px;
  margin-top: 8px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: filter 0.15s, transform 0.1s;
}

.merchant-login-btn:hover:not(:disabled) {
  filter: brightness(1.06);
}

.merchant-login-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.merchant-login-btn:disabled {
  opacity: 0.7;
  cursor: wait;
}

.merchant-login-error {
  min-height: 20px;
  margin: 12px 0 0;
  font-size: 0.8125rem;
  color: #dc2626;
  text-align: center;
}

.merchant-login-foot {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid #f1f5f9;
  text-align: center;
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.5;
}

.merchant-login-foot a {
  color: #0d9488;
  text-decoration: none;
  font-weight: 500;
}

.merchant-login-foot a:hover {
  text-decoration: underline;
}

.merchant-login-demo {
  margin-top: 16px;
  padding: 10px 12px;
  border-radius: 8px;
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  font-size: 0.75rem;
  color: #0f766e;
  text-align: center;
  line-height: 1.5;
}

.merchant-login-demo strong {
  font-weight: 600;
}

@media (max-width: 900px) {
  .merchant-login-page {
    grid-template-columns: 1fr;
  }

  .merchant-login-hero {
    display: none;
  }

  .merchant-login-panel {
    min-height: 100vh;
  }
}