/**
 * Trang đăng nhập admin — giao diện hiện đại (độc lập AdminLTE login-box)
 */
:root {
  --al-navy: #0f2744;
  --al-navy-mid: #1a3a5c;
  --al-blue: #2563eb;
  --al-blue-soft: rgba(37, 99, 235, 0.12);
  --al-card: #ffffff;
  --al-text: #0f172a;
  --al-muted: #64748b;
  --al-border: rgba(148, 163, 184, 0.35);
  --al-danger-bg: #fef2f2;
  --al-danger-text: #991b1b;
  --al-danger-border: rgba(239, 68, 68, 0.25);
  --al-success-bg: #ecfdf5;
  --al-success-text: #065f46;
  --al-radius: 18px;
  --al-radius-sm: 12px;
  --al-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
  --al-ring: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body.admin-login-modern {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--al-text);
  background: var(--al-navy);
  -webkit-font-smoothing: antialiased;
}

.admin-login-modern__bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(91, 146, 229, 0.45), transparent 55%),
    radial-gradient(ellipse 90% 60% at 100% 50%, rgba(37, 99, 235, 0.2), transparent 50%),
    radial-gradient(ellipse 70% 50% at 0% 80%, rgba(14, 165, 233, 0.15), transparent 45%),
    linear-gradient(165deg, var(--al-navy-mid) 0%, var(--al-navy) 45%, #0a1628 100%);
  pointer-events: none;
}

.admin-login-modern__wrap {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px calc(32px + env(safe-area-inset-bottom, 0));
}

.admin-login-modern__card {
  width: 100%;
  max-width: 420px;
  background: var(--al-card);
  border-radius: var(--al-radius);
  box-shadow: var(--al-shadow);
  padding: 32px 28px 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

@media (min-width: 480px) {
  .admin-login-modern__card {
    padding: 40px 36px 32px;
  }
}

.admin-login-modern__brand {
  display: flex;
  justify-content: center;
  margin-bottom: 8px;
}

/**
 * Logo PNG hay có nền đen: đặt trong đĩa tròn xanh đậm (cùng tông trang) +
 * mix-blend-mode: lighten → pixel đen hòa vào nền, phần màu logo giữ lại.
 */
.admin-login-modern__logo-disc {
  width: 118px;
  height: 118px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(155deg, #1e4976 0%, var(--al-navy-mid) 38%, var(--al-navy) 100%);
  box-shadow:
    0 8px 28px rgba(15, 23, 42, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

@media (min-width: 480px) {
  .admin-login-modern__logo-disc {
    width: 132px;
    height: 132px;
  }
}

.admin-login-modern__logo {
  width: 86%;
  height: 86%;
  max-width: 120px;
  max-height: 120px;
  object-fit: contain;
  display: block;
  mix-blend-mode: lighten;
  -webkit-mix-blend-mode: lighten;
}

@supports not (mix-blend-mode: lighten) {
  .admin-login-modern__logo {
    mix-blend-mode: normal;
  }
}

.admin-login-modern__title {
  margin: 12px 0 20px;
  text-align: center;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--al-text);
}

.admin-login-modern__lead {
  margin: -6px 0 18px;
  text-align: center;
  font-size: 14px;
  line-height: 1.5;
  color: var(--al-muted);
  font-weight: 500;
}

/* Thông báo */
.admin-login-modern__messages {
  margin-bottom: 20px;
}

.admin-login-modern__messages .alert {
  margin: 0;
  border-radius: var(--al-radius-sm);
  border: 1px solid transparent;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.5;
  font-weight: 500;
}

.admin-login-modern__messages .alert button.close,
.admin-login-modern__messages .alert .close {
  display: none !important;
}

.admin-login-modern__messages .alert h4 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.admin-login-modern__messages .alert .icon {
  display: none !important;
}

.admin-login-modern__messages .alert-danger {
  background: var(--al-danger-bg);
  color: var(--al-danger-text);
  border-color: var(--al-danger-border);
}

.admin-login-modern__messages .alert-success {
  background: var(--al-success-bg);
  color: var(--al-success-text);
  border-color: rgba(16, 185, 129, 0.25);
}

.admin-login-modern__messages .alert ul {
  margin: 8px 0 0;
  padding-left: 1.1rem;
}

/* Form */
.admin-login-modern__form .form-group {
  margin-bottom: 16px;
  position: relative;
}

.admin-login-modern__form .form-control {
  height: 48px;
  border-radius: var(--al-radius-sm);
  border: 1px solid var(--al-border);
  padding-left: 44px;
  padding-right: 14px;
  font-size: 15px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.admin-login-modern__form .form-control:focus {
  border-color: var(--al-blue);
  box-shadow: var(--al-ring);
  outline: none;
}

.admin-login-modern__form .form-control-feedback {
  left: 14px;
  right: auto;
  top: 50%;
  transform: translateY(-50%);
  height: auto;
  line-height: 1;
  color: var(--al-muted);
  pointer-events: none;
}

.admin-login-modern__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
}

.admin-login-modern__actions .btn-link {
  padding: 0 !important;
  font-size: 14px;
  font-weight: 600;
  color: var(--al-blue);
  text-decoration: none;
}

.admin-login-modern__actions .btn-link:hover {
  text-decoration: underline;
  color: #1d4ed8;
}

.admin-login-modern__submit {
  min-width: 132px;
  height: 46px;
  border-radius: var(--al-radius-sm);
  font-weight: 700;
  font-size: 15px;
  border: none;
  background: linear-gradient(135deg, #3b82f6 0%, var(--al-blue) 50%, #1d4ed8 100%);
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.admin-login-modern__submit:hover,
.admin-login-modern__submit:focus {
  color: #fff !important;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.admin-login-modern__submit:active {
  transform: translateY(1px);
}

.admin-login-modern__submit--block {
  display: block;
  width: 100%;
  min-width: 0;
  margin-top: 4px;
}

.admin-login-modern__home {
  margin-top: 24px;
  text-align: center;
}

.admin-login-modern__home a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: background 0.15s ease, color 0.15s ease;
}

.admin-login-modern__home a:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}