@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-primary:     #1B2F6E;
  --color-primary-mid: #2D4FAA;
  --color-primary-light: #4F6FD0;
  --color-lila:        #EEF0FF;
  --color-lila-mid:    #C8CAFF;
  --color-accent:      #E8593C;
  --color-gray-soft:   #F8F9FC;
  --color-gray-mid:    #6B7280;
  --color-gray-border: #E5E7EB;
  --color-white:       #FFFFFF;
  --color-error:       #DC2626;
  --color-success:     #16A34A;
  --shadow-card: 0 4px 24px rgba(27, 47, 110, 0.10);
  --shadow-btn:  0 2px 8px  rgba(27, 47, 110, 0.25);
  --radius-card: 0.375rem;
  --radius-input: 0.625rem;
  --radius-btn:   0.625rem;
  --transition:  all 0.2s ease;
}

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

body {
  font-family: 'Inter', sans-serif;
  background: linear-gradient(135deg, #EEF0FF 0%, #F8F9FC 60%, #EEF0FF 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---- Fondo decorativo ---- */
.auth-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}
.auth-bg__circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.18;
}
.auth-bg__circle--1 {
  width: 520px; height: 520px;
  background: var(--color-lila-mid);
  top: -160px; left: -160px;
}
.auth-bg__circle--2 {
  width: 380px; height: 380px;
  background: var(--color-primary-light);
  bottom: -120px; right: -120px;
}
.auth-bg__circle--3 {
  width: 200px; height: 200px;
  background: var(--color-lila-mid);
  top: 40%; right: 8%;
}

/* ---- Contenedor principal ---- */
.auth-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 460px;
  padding: 1.5rem;
}

/* ---- Tarjeta ---- */
.auth-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 2.5rem 2.5rem 2rem;
  border: 1px solid rgba(200, 202, 255, 0.4);
}

/* ---- Encabezado ---- */
.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}
.auth-logo-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.auth-logo-img {
  height: 64px;
  width: auto;
  object-fit: contain;
}
.auth-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.auth-subtitle {
  font-size: 0.875rem;
  color: var(--color-gray-mid);
  margin-top: 0.25rem;
}

/* ---- Formulario ---- */
.form-group { margin-bottom: 1.25rem; }

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
  letter-spacing: 0.01em;
}

.input-wrapper {
  position: relative;
}
.input-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: var(--color-gray-mid);
  pointer-events: none;
}
.form-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border: 1.5px solid var(--color-gray-border);
  border-radius: var(--radius-input);
  font-size: 0.9375rem;
  color: #111827;
  background: var(--color-gray-soft);
  transition: var(--transition);
  outline: none;
}
.form-input::placeholder { color: #9CA3AF; }
.form-input:focus {
  border-color: var(--color-primary-mid);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(45, 79, 170, 0.10);
}
.form-input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.08);
}
.input-toggle {
  position: absolute;
  right: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-mid);
  padding: 0;
  display: flex;
}
.input-toggle:hover { color: var(--color-primary); }

/* ---- Botón principal ---- */
.btn-primary {
  width: 100%;
  padding: 0.8125rem 1rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-mid) 100%);
  color: white;
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-btn);
  letter-spacing: 0.01em;
  margin-top: 0.5rem;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(27, 47, 110, 0.30);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}
.btn-primary.loading::after {
  content: '';
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 8px;
  vertical-align: middle;
}

/* ---- Alertas ---- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  animation: fadeIn 0.3s ease;
}
.alert svg { width: 16px; height: 16px; shrink: 0; margin-top: 1px; }
.alert--error  { background: #FEF2F2; border: 1px solid #FECACA; color: var(--color-error); }
.alert--success{ background: #F0FDF4; border: 1px solid #BBF7D0; color: var(--color-success); }
.alert--info   { background: var(--color-lila); border: 1px solid var(--color-lila-mid); color: var(--color-primary); }

/* ---- Links ---- */
.auth-link {
  color: var(--color-primary-mid);
  font-size: 0.875rem;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}
.auth-link:hover { color: var(--color-primary); text-decoration: underline; }

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-gray-border);
}
.auth-footer p { font-size: 0.8125rem; color: var(--color-gray-mid); }

/* ---- Divisor ---- */
.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
  color: var(--color-gray-mid);
  font-size: 0.8125rem;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-gray-border);
}

/* ---- Chip de ayuda ---- */
.help-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: var(--color-lila);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: 2rem;
  margin-top: 1rem;
}

/* ---- Animaciones ---- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-6px); }
  75%      { transform: translateX(6px); }
}
.shake { animation: shake 0.4s ease; }

/* ---- Responsive ---- */
@media (max-width: 480px) {
  .auth-card { padding: 2rem 1.5rem; }
  .auth-wrapper { padding: 1rem; }
}

/* ---- Botón secundario ---- */
.btn-secondary {
  display: block;
  width: 100%;
  padding: 0.8125rem 1rem;
  background: white;
  color: var(--color-primary);
  font-size: 0.9375rem;
  font-weight: 600;
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  text-decoration: none;
  margin-top: 0.75rem;
  letter-spacing: 0.01em;
}
.btn-secondary:hover {
  background: var(--color-lila);
}

/* ---- Modal Registro ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.55);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.modal-overlay.modal-open {
  display: flex;
}
.modal-overlay.modal-visible {
  opacity: 1;
}
.modal-card {
  background: white;
  border-radius: 0.375rem;
  box-shadow: 0 20px 60px rgba(27,47,110,0.18);
  width:96vw;
  max-width: 860px;
  height: 95vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}
.modal-overlay.modal-visible .modal-card {
  transform: translateY(0);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-gray-border);
  flex-shrink: 0;
}
.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}
.modal-subtitle {
  font-size: 0.8125rem;
  color: var(--color-gray-mid);
  margin-top: 0.1rem;
}
.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-mid);
  padding: 0.25rem;
  border-radius: 0.375rem;
  transition: var(--transition);
  display: flex;
}
.modal-close:hover {
  background: var(--color-lila);
  color: var(--color-primary);
}
.modal-body {
  overflow-y: auto;
  max-height: 80vh;
}

@media (max-width: 480px) {
  .modal-card {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }
}

.alert--warning {
  background: #FFFBEB;
  border: 1px solid #FCD34D;
  color: #92400E;
}
.alert--warning svg {
  width: 18px; height: 18px;
  stroke: #D97706;
  flex-shrink: 0;
}