/* ========================================
   Portal Académico - Estilos de Login
   IMPORTANTE: Este archivo usa variables de variables.css
   ======================================== */

body {
  background: var(--gradient-login-bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 20px;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-login-bg);
  z-index: -1;
}

.portal-container {
  max-width: 420px;
  width: 100%;
}

.portal-header {
  text-align: center;
  color: white;
  margin-bottom: 20px;
}

.portal-header i {
  font-size: 2rem;
  margin-bottom: 8px;
  display: block;
}

.portal-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 3px;
}

.portal-header p {
  font-size: 0.9rem;
  opacity: 0.9;
  margin: 0;
}

.login-card {
  background: linear-gradient(
    to bottom,
    var(--bg-green-lighter) 0%,
    var(--bg-green-lightest) 100%
  );
  border-radius: 20px;
  padding: 30px 30px;
  box-shadow: var(--shadow-xl);
  position: relative;
  border-top: 4px solid var(--primary-color);
}

.back-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-base);
  font-size: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border: 2px solid var(--primary-color);
}

.back-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: translateX(-5px) scale(1.1);
  box-shadow: var(--shadow-lg);
}

.role-icon {
  width: 65px;
  height: 65px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}

.role-icon i {
  font-size: 2rem;
  color: white;
}

.role-icon.estudiante {
  background: var(--primary-color);
}

.role-icon.docente {
  background: var(--primary-color);
}

.login-card h2 {
  font-size: 1.4rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.login-card .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 35px;
  font-size: 0.95rem;
}

.input-group-custom {
  position: relative;
  margin-bottom: 25px;
}

.input-group-custom i {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
}

.form-control-custom {
  width: 100%;
  padding: 15px 18px 15px 52px;
  border: 2px solid var(--border-green);
  border-radius: var(--radius-xl);
  font-size: 1rem;
  transition: var(--transition-smooth);
  outline: none;
  background: #f8fcfa;
  font-weight: 500;
  color: var(--text-dark);
  box-shadow: var(--shadow-sm);
}

.form-control-custom:focus {
  border-color: var(--primary-color);
  box-shadow: var(--focus-ring-primary-sm);
}

.form-control-custom::placeholder {
  color: var(--border-medium);
}

.btn-submit {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: var(--radius-xl);
  font-size: 1.05rem;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-submit.estudiante {
  background: var(--gradient-primary);
}

.btn-submit.estudiante:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  background: var(--primary-dark);
}

.btn-submit.docente {
  background: var(--gradient-primary);
}

.btn-submit.docente:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  background: var(--primary-dark);
}

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

/* Estilos para página de verificación */

.code-input {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: 10px;
  padding: 20px;
  text-transform: uppercase;
}

.resend-link {
  text-align: center;
  margin-top: 20px;
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
}

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

/* Responsive - Pantallas grandes (hasta 1366px) */

@media (max-width: 1366px) {
  .portal-container {
    max-width: 420px;
  }
  .portal-header i {
    font-size: 2.5rem;
  }
  .portal-header h1 {
    font-size: 1.75rem;
  }
  .login-card {
    padding: 40px 35px;
  }
  .role-icon {
    width: 75px;
    height: 75px;
  }
  .role-icon i {
    font-size: 2.2rem;
  }
}

/* Responsive - Pantallas medianas (hasta 1024px) */

@media (max-width: 1024px) {
  body {
    padding: 15px;
  }
  .portal-container {
    max-width: 400px;
  }
  .portal-header {
    margin-bottom: 25px;
  }
  .portal-header i {
    font-size: 2.3rem;
  }
  .portal-header h1 {
    font-size: 1.6rem;
  }
  .portal-header p {
    font-size: 0.9rem;
  }
  .login-card {
    padding: 35px 30px;
  }
  .login-card h2 {
    font-size: 1.5rem;
  }
  .role-icon {
    width: 70px;
    height: 70px;
  }
  .role-icon i {
    font-size: 2rem;
  }
}

/* Responsive - Tablets (hasta 768px) */

@media (max-width: 768px) {
  .portal-container {
    max-width: 380px;
  }
  .portal-header i {
    font-size: 2.2rem;
  }
  .portal-header h1 {
    font-size: 1.5rem;
  }
  .login-card {
    padding: 30px 25px;
  }
  .login-card h2 {
    font-size: 1.4rem;
  }
  .role-icon {
    width: 65px;
    height: 65px;
  }
  .role-icon i {
    font-size: 1.8rem;
  }
  .form-control-custom {
    padding: 14px 16px 14px 48px;
    font-size: 0.95rem;
  }
  .input-group-custom i {
    left: 16px;
    font-size: 1rem;
  }
  .btn-submit {
    padding: 15px 20px;
    font-size: 1rem;
  }
}

/* Responsive - Móviles (hasta 576px) */

@media (max-width: 576px) {
  body {
    padding: 10px;
  }
  .portal-container {
    max-width: 100%;
  }
  .portal-header {
    margin-bottom: 20px;
  }
  .portal-header i {
    font-size: 2rem;
    margin-bottom: 10px;
  }
  .portal-header h1 {
    font-size: 1.4rem;
  }
  .portal-header p {
    font-size: 0.85rem;
  }
  .login-card {
    padding: 25px 20px;
    border-radius: 16px;
  }
  .login-card h2 {
    font-size: 1.3rem;
  }
  .login-card .subtitle {
    font-size: 0.9rem;
    margin-bottom: 25px;
  }
  .role-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
  }
  .role-icon i {
    font-size: 1.6rem;
  }
  .input-group-custom {
    margin-bottom: 18px;
  }
  .form-control-custom {
    padding: 13px 15px 13px 45px;
    font-size: 0.9rem;
  }
  .input-group-custom i {
    left: 15px;
    font-size: 0.95rem;
  }
  .btn-submit {
    padding: 14px 18px;
    font-size: 0.95rem;
  }
  .back-btn {
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
    top: 15px;
    left: 15px;
  }
  .code-input {
    font-size: 1.4rem;
    letter-spacing: 5px;
    padding: 16px;
  }
}

/* Responsive - Móviles pequeños (hasta 375px) */

@media (max-width: 375px) {
  .portal-header i {
    font-size: 1.8rem;
  }
  .portal-header h1 {
    font-size: 1.25rem;
  }
  .login-card {
    padding: 20px 18px;
  }
  .login-card h2 {
    font-size: 1.2rem;
  }
  .role-icon {
    width: 55px;
    height: 55px;
  }
  .role-icon i {
    font-size: 1.5rem;
  }
  .form-control-custom {
    padding: 12px 14px 12px 42px;
    font-size: 0.85rem;
  }
  .btn-submit {
    padding: 13px 16px;
    font-size: 0.9rem;
  }
}