/* ============================================================
   REGISTER PAGE — Consistent with app design system
   Uses: style.css vars, design-system/tokens.css, sintra-theme
   ============================================================ */

/* === Card Container === */
.login-container {
  max-width: 520px;
  margin: 60px auto;
  padding: 0;
}

.login-card {
  background: var(--nb-card, #1a1a24);
  border: 1px solid var(--nb-border, rgba(200, 200, 240, 0.18));
  border-radius: 16px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  overflow: hidden;
}

.login-card .card-header {
  background: linear-gradient(135deg, var(--nb-card, #1a1a24), rgba(255, 215, 0, 0.04)) !important;
  border-bottom: 1px solid var(--nb-border, rgba(200, 200, 240, 0.18)) !important;
  padding: 1.5rem 2rem;
  text-align: center;
}

.login-card .card-header img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 12px;
  background: #fff;
  padding: 4px;
  margin-bottom: 0.5rem;
}

.login-card .card-header h3 {
  color: var(--nb-fg, #ffffff);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.login-card .card-header p {
  color: var(--nb-muted, #a1a1aa);
  font-size: 0.9rem;
  margin: 0;
}

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

/* === Form Groups === */
.form-group-modern {
  margin-bottom: 1.25rem;
}

.form-label-modern {
  display: block;
  color: var(--nb-fg, #ffffff);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.01em;
}

.form-label-modern i {
  color: var(--nb-gold, #FFD700);
  opacity: 0.8;
}

/* === Input Groups === */
.input-group-modern {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group-modern-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--nb-gold, #FFD700);
  opacity: 0.6;
  font-size: 0.9rem;
  z-index: 2;
  pointer-events: none;
}

.form-control-modern {
  width: 100%;
  display: block;
  padding: 0.75rem 0.875rem 0.75rem 2.5rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--nb-fg, #ffffff);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--nb-border, rgba(200, 200, 240, 0.18));
  border-radius: 10px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

.form-control-modern::placeholder {
  color: var(--nb-muted, #a1a1aa);
  opacity: 0.6;
}

.form-control-modern:focus {
  outline: none;
  background: rgba(255, 215, 0, 0.04);
  border-color: var(--nb-gold, #FFD700);
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.12);
  color: var(--nb-fg, #ffffff);
}

/* === Form Text & Help === */
.form-group-modern .form-text {
  display: block;
  margin-top: 0.375rem;
  font-size: 0.78rem;
  color: var(--nb-muted, #a1a1aa);
  opacity: 0.8;
  line-height: 1.4;
}

.form-group-modern .form-text i {
  font-size: 0.75rem;
}

/* === Checkboxes === */
.form-group-modern .form-check {
  padding-left: 1.75rem;
}

.form-group-modern .form-check-input {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(200, 200, 240, 0.3);
  border-radius: 4px;
  width: 1rem;
  height: 1rem;
  margin-top: 0.15rem;
}

.form-group-modern .form-check-input:checked {
  background-color: var(--nb-gold, #FFD700);
  border-color: var(--nb-gold, #FFD700);
}

.form-group-modern .form-check-label {
  color: var(--nb-muted, #a1a1aa);
  font-size: 0.82rem;
}

/* === Buttons === */
.btn-modern {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-modern-primary {
  background: linear-gradient(135deg, var(--nb-gold, #FFD700), var(--nb-gold-strong, #f0c050));
  color: #111 !important;
  border: 1px solid rgba(255, 215, 0, 0.6);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.15);
}

.btn-modern-primary:hover {
  background: linear-gradient(135deg, #ffe033, var(--nb-gold, #FFD700));
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(255, 215, 0, 0.25);
  color: #111 !important;
}

.btn-modern-primary:active {
  transform: translateY(0);
}

.btn-modern-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* === Alerts === */
.alert-modern {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: 10px;
  font-size: 0.875rem;
  line-height: 1.5;
}

.alert-modern-danger {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #fca5a5;
}

.alert-modern-icon {
  flex-shrink: 0;
  font-size: 1rem;
  color: #f87171;
  margin-top: 1px;
}

/* === Text Gradient (gold links) === */
.text-gradient {
  background: linear-gradient(135deg, var(--nb-gold, #FFD700), #f0c050);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  font-weight: 600;
}

a.text-gradient:hover {
  filter: brightness(1.15);
}

/* === Footer alignment === */
.login-card + .mt-4 {
  color: var(--nb-muted, #a1a1aa);
}

/* === Responsive === */
@media (max-width: 576px) {
  .login-container {
    margin: 20px auto;
    padding: 0 12px;
  }

  .login-card .card-header {
    padding: 1.25rem 1.25rem;
  }

  .login-card .card-body {
    padding: 1.25rem;
  }

  .form-control-modern {
    font-size: 16px; /* Prevents iOS zoom on focus */
  }

  .btn-modern {
    width: 100%;
    padding: 0.8rem 1rem;
  }
}

/* === Animation === */
.fade-in {
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}