/* ============================================================
   login.css  —  Estilos de la página de inicio de sesión
   ============================================================ */

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

:root {
  --primary:        #1a6bb5;
  --primary-dark:   #145491;
  --primary-light:  #e8f1fb;
  --danger:         #dc3545;
  --success:        #198754;
  --text:           #2c3e50;
  --muted:          #6c757d;
  --border:         #ced4da;
  --bg:             #f0f4f8;
  --card-bg:        #ffffff;
  --shadow:         0 8px 32px rgba(26,107,181,.15);
  --radius:         10px;
  --font:           'Segoe UI', system-ui, -apple-system, sans-serif;
  --transition:     .2s ease;
}

body {
  font-family: var(--font);
  background: linear-gradient(135deg, #c1cdd7 0%, #4c6781 40%, #2a425d 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

/* ---- Tarjeta de login ---- */
.login-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 420px;
  overflow: hidden;
  animation: slideUp .4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.login-header {
  background: #8ea6bb;
  color: #fff;
  text-align: center;
  padding: 2rem 1.5rem 1.5rem;
}

.login-header .logo-icon {
  font-size: 3rem;
  margin-bottom: .5rem;
  display: block;
}

.login-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: .5px;
}

.login-header p {
  font-size: .85rem;
  opacity: .85;
  margin-top: .3rem;
}

.login-body {
  padding: 2rem 1.75rem 1.5rem;
}

/* ---- Grupos de campo ---- */
.field-group {
  margin-bottom: 1.25rem;
}

.field-group label {
  display: block;
  font-size: .825rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: .4rem;
}

.field-group .input-wrapper {
  position: relative;
}

.field-group .input-icon {
  position: absolute;
  left: .75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 1rem;
}

.field-group input {
  width: 100%;
  padding: .6rem .75rem .6rem 2.4rem;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: .95rem;
  font-family: var(--font);
  color: var(--text);
  background: #fafafa;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.field-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,107,181,.15);
  background: #fff;
}

.field-group input.is-invalid {
  border-color: var(--danger);
}

.field-error {
  font-size: .78rem;
  color: var(--danger);
  margin-top: .3rem;
  display: none;
}

.field-error.visible { display: block; }

/* ---- Alerta global ---- */
.alert {
  border-radius: 6px;
  padding: .7rem 1rem;
  font-size: .875rem;
  margin-bottom: 1rem;
  display: none;
}

.alert.visible { display: block; }
.alert-danger  { background: #fff3f3; color: var(--danger); border: 1px solid #f5c6cb; }
.alert-success { background: #f0fff4; color: var(--success); border: 1px solid #c3e6cb; }

/* ---- Botón principal ---- */
.btn-login {
  width: 100%;
  padding: .75rem;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
}

.btn-login:hover:not(:disabled) { background: var(--primary-dark); transform: translateY(-1px); }
.btn-login:active:not(:disabled){ transform: translateY(0); }
.btn-login:disabled { opacity: .65; cursor: not-allowed; }

/* ---- Spinner ---- */
.spinner {
  width: 1.1rem; height: 1.1rem;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: none;
}
.btn-login.loading .spinner { display: block; }
.btn-login.loading .btn-text { display: none; }

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

.login-footer {
  text-align: center;
  padding: 1rem;
  border-top: 1px solid #eee;
  font-size: .78rem;
  color: var(--muted);
}