/* ========================================
   LOGIN — Área de profesores (neutro / white-label)
   ======================================== */

:root {
  --login-font: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --login-text: #0f172a;
  --login-text-muted: #64748b;
  --login-surface: #ffffff;
  --login-border: #e2e8f0;
  --login-border-focus: #94a3b8;
  --login-accent: #334155;
  --login-accent-hover: #1e293b;
  --login-accent-soft: #f1f5f9;
  --login-danger: #b91c1c;
  --login-danger-bg: #fef2f2;
  --login-success: #15803d;
  --login-success-bg: #f0fdf4;
  --login-radius: 16px;
  --login-shadow: 0 24px 48px rgba(15, 23, 42, 0.08), 0 8px 16px rgba(15, 23, 42, 0.04);
}

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

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--login-font);
  color: var(--login-text);
  -webkit-font-smoothing: antialiased;
}

.login-page {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 24px 16px;
  overflow: hidden;
}

.login-page__backdrop {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(148, 163, 184, 0.18) 0%, transparent 42%),
    radial-gradient(circle at 85% 80%, rgba(100, 116, 139, 0.14) 0%, transparent 40%),
    linear-gradient(160deg, #f8fafc 0%, #eef2f7 48%, #e8edf3 100%);
  z-index: 0;
}

.login-page__backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(148, 163, 184, 0.35) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.35;
  mask-image: radial-gradient(circle at center, black 30%, transparent 85%);
}

.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: 32px 32px 28px;
  background: var(--login-surface);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--login-radius);
  box-shadow: var(--login-shadow);
}

.login-card__header {
  margin-bottom: 28px;
  text-align: center;
}

.login-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
  border-radius: 14px;
  background: var(--login-accent-soft);
  color: var(--login-accent);
}

.login-card__icon i {
  font-size: 26px;
  line-height: 1;
}

.login-card__title {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.login-card__subtitle {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--login-text-muted);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.login-form__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.login-form__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--login-text);
}

.login-form__input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--login-border);
  border-radius: 10px;
  background: #fff;
  color: var(--login-text);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.login-form__input::placeholder {
  color: #94a3b8;
}

.login-form__input:hover {
  border-color: #cbd5e1;
}

.login-form__input:focus {
  outline: none;
  border-color: var(--login-border-focus);
  box-shadow: 0 0 0 3px rgba(148, 163, 184, 0.25);
}

.login-form__password {
  position: relative;
}

.login-form__input--password {
  padding-right: 44px;
}

.login-form__toggle-password {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--login-text-muted);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.login-form__toggle-password:hover {
  background: var(--login-accent-soft);
  color: var(--login-accent);
}

.login-form__toggle-password i {
  font-size: 18px;
  line-height: 1;
}

.login-form__submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  margin-top: 4px;
  padding: 0 16px;
  border: 0;
  border-radius: 10px;
  background: var(--login-accent);
  color: #fff;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease, opacity 0.15s ease;
}

.login-form__submit:hover:not(:disabled) {
  background: var(--login-accent-hover);
}

.login-form__submit:active:not(:disabled) {
  transform: translateY(1px);
}

.login-form__submit:disabled {
  opacity: 0.72;
  cursor: wait;
}

.login-form__submit.is-loading .login-form__submit-label::after {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-left: 8px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  vertical-align: -2px;
  animation: login-spin 0.7s linear infinite;
}

@keyframes login-spin {
  to {
    transform: rotate(360deg);
  }
}

.login-message {
  display: none;
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.45;
  text-align: center;
}

.login-message.error {
  display: block;
  color: var(--login-danger);
  background: var(--login-danger-bg);
  border: 1px solid #fecaca;
}

.login-message.success {
  display: block;
  color: var(--login-success);
  background: var(--login-success-bg);
  border: 1px solid #bbf7d0;
}

@media (max-width: 480px) {
  .login-card {
    padding: 28px 22px 24px;
  }

  .login-card__title {
    font-size: 1.35rem;
  }

  .login-card__subtitle {
    font-size: 0.875rem;
  }
}