body {
  background: var(--gradient-bg-light);
  color: var(--color-text-on-light);
  min-height: 100vh;
}

/* ===== HEADER ===== */
.page-header {
  position: relative;
  background: var(--gradient-bg-dark);
  color: var(--color-text-strong);
  padding: var(--space-12) var(--space-5) var(--space-10);
  text-align: center;
  border-bottom-left-radius: 40px;
  border-bottom-right-radius: 40px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
}

.page-header .brand {
  font-size: var(--fs-3xl);
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
}

.page-header .brand__tagline {
  letter-spacing: 0.12em;
}

.header-sub {
  margin-top: var(--space-3);
  font-size: var(--fs-md);
  color: var(--color-text);
  opacity: 0.92;
}

.back-btn {
  position: absolute;
  top: var(--space-5);
  left: var(--space-5);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  width: auto;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-family: inherit;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: all var(--transition-base);
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(-3px);
}

/* ===== CONTAINER ===== */
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-5);
}

/* ===== CARD ===== */
.card {
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-light);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-card-light);
  transition: transform var(--transition-base), box-shadow var(--transition-base),
              border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card.is-missing {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.12);
}

/* ===== QUESTION ===== */
.question {
  font-weight: var(--fw-semibold);
  font-size: var(--fs-md);
  color: var(--color-text-on-light);
  margin-bottom: var(--space-3);
  display: block;
}

/* ===== SELECT ===== */
#aulaSelect {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  background: var(--color-surface-light);
  font-size: var(--fs-base);
  font-family: inherit;
  color: var(--color-text-on-light);
  transition: all var(--transition-fast);
}

#aulaSelect:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-surface-light-strong);
  box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.15);
}

/* ===== CHIPS ===== */
.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  padding: 10px 16px;
  background: #f1f5f9;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: 1px solid transparent;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-on-light);
  transition: transform var(--transition-fast), background var(--transition-fast),
              border-color var(--transition-fast), box-shadow var(--transition-fast);
  user-select: none;
}

.chip:hover {
  background: #e0e7ff;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.chip.selected {
  background: var(--gradient-primary);
  color: white;
  border-color: transparent;
  box-shadow: 0 6px 16px rgba(74, 108, 247, 0.35);
}

/* ===== BUTTON SUBMIT ===== */
.btn-submit {
  width: 100%;
  background: var(--gradient-bg-dark);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  font-family: inherit;
  cursor: pointer;
  margin-top: var(--space-5);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.25);
}

.btn-submit:hover:not([disabled]) {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.32);
}

.btn-submit:active:not([disabled]) {
  transform: scale(0.98);
}

.btn-submit[disabled] {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Spinner inline */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 8px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: -2px;
}

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

/* ===== FINAL SCREEN ===== */
.final-screen {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.final-card {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  width: min(360px, 90vw);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  animation: scaleIn 0.3s ease;
}

.final-check {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: white;
  font-size: 28px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.35);
}

.final-card h2 {
  margin-bottom: var(--space-2);
  font-size: var(--fs-xl);
  color: var(--color-text-on-light);
}

.final-card p {
  color: var(--color-text-muted-on-light);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-5);
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-content {
  min-width: 260px;
  max-width: 360px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  box-shadow: var(--shadow-md);
  animation: slideIn 0.4s ease;
}

.toast.success .toast-content {
  background: #16a34a;
  border-left: 4px solid #4ade80;
  color: white;
}

.toast.warning .toast-content {
  background: #b45309;
  border-left: 4px solid #fbbf24;
  color: white;
}

.toast.error .toast-content {
  background: #b91c1c;
  border-left: 4px solid #f87171;
  color: white;
}

.toast.hide {
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-slow);
}

.hidden { display: none; }

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-30px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 540px) {
  .page-header { padding: var(--space-10) var(--space-4) var(--space-8); }
  .page-header .brand { font-size: var(--fs-2xl); }
  .container { padding: var(--space-6) var(--space-4); }
  .card { padding: var(--space-5); }
}