:root {
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --border-color: #cbd5e1;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --danger-border: #fca5a5;
  --radius: 12px;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.login-wrapper {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background-color: var(--bg-surface);
  border: 1px solid #e2e8f0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
}

/* HEADER */
.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.brand-logo {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.login-header p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ALERTA DE ERROR */
.alert-box {
  background-color: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.alert-box.hidden {
  display: none;
}

/* FORMULARIO */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.forgot-link {
  font-size: 0.75rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.forgot-link:hover {
  text-decoration: underline;
}

/* INPUTS CON ÍCONO */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 0.85rem;
  font-size: 0.9rem;
  pointer-events: none;
  opacity: 0.7;
}

.input-wrapper input {
  width: 100%;
  padding: 0.75rem 0.85rem 0.75rem 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-toggle-pwd {
  position: absolute;
  right: 0.75rem;
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.6;
  font-size: 0.9rem;
  padding: 0.2rem;
}

.btn-toggle-pwd:hover {
  opacity: 1;
}

/* CHECKBOX */
.form-options {
  display: flex;
  align-items: center;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
}

.checkbox-label input {
  accent-color: var(--primary);
  width: 16px;
  height: 16px;
}

/* BOTÓN LOGIN */
.btn-login {
  width: 100%;
  padding: 0.8rem;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.btn-login:hover {
  background-color: var(--primary-hover);
}

.btn-login:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* SPINNER CARGANDO */
.btn-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-spinner.hidden {
  display: none;
}

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

/* FOOTER */
.login-footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.login-footer a {
  color: var(--primary);
  text-decoration: none;
}

.login-footer a:hover {
  text-decoration: underline;
}
/* Estilos reales para las alertas que genera auth.js (auth-alert / alert-error / alert-success) */
.auth-alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}
.auth-alert.alert-error {
  background-color: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
}
.auth-alert.alert-success {
  background-color: #f0fdf4;
  color: #16a34a;
  border: 1px solid #86efac;
}