/* ============================================
   Birdie CO2 Experience — Mobile-First Styles
   Theme: Black & Yellow (#F5C518)
   Font: Inter
   ============================================ */

:root {
  --bg-dark: #000000;
  --bg-light: #ffffff;
  --yellow: #F5C518;
  --yellow-hover: #E0B400;
  --yellow-dim: rgba(245, 197, 24, 0.15);
  --text-light: #ffffff;
  --text-dark: #1a1a1a;
  --text-muted: #999999;
  --border-dark: #333333;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s ease;
}

/* Reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.5;
  overflow: hidden;
  height: 100dvh;
  width: 100vw;
}

a {
  color: var(--yellow);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--yellow-hover);
}

sub {
  font-size: 0.7em;
}

/* ============================================
   Screens — full viewport sections
   ============================================ */

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  opacity: 0;
  transform: translateX(30px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

.screen.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
  z-index: 1;
}

.screen--dark {
  background: var(--bg-dark);
  color: var(--text-light);
}

.screen--light {
  background: var(--bg-light);
  color: var(--text-dark);
}

.screen__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 24px 20px 40px;
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
}

.screen__content--centered {
  justify-content: center;
  align-items: center;
  text-align: center;
}

/* ============================================
   Progress Bar
   ============================================ */

.progress-bar {
  display: flex;
  gap: 4px;
  padding: 12px 20px 0;
  flex-shrink: 0;
}

.progress-bar::before,
.progress-bar::after,
.progress-bar .dot1,
.progress-bar .dot2,
.progress-bar .dot3 {
  content: '';
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--border-dark);
  transition: background var(--transition);
}

/* JS adds these data attributes; CSS handles the fill */
.screen--light .progress-bar::before,
.screen--light .progress-bar::after {
  background: #e0e0e0;
}

/* We'll use JS to generate the progress dots properly */

/* ============================================
   Screen 1: Consent
   ============================================ */

.consent-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin-bottom: 28px;
  padding-top: 8px;
}

.consent-logo__text {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.consent-logo__name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-light);
  letter-spacing: 0.02em;
}

.consent-logo__name-fr {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-muted);
  font-style: italic;
}

.consent-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 20px;
  text-align: center;
}

.consent-body {
  flex: 1;
  margin-bottom: 24px;
}

.consent-body p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #cccccc;
  margin-bottom: 12px;
}

.consent-body p:last-child {
  margin-bottom: 0;
}

/* Consent checkbox */
.consent-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 24px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.consent-checkbox input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.consent-checkbox__box {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: 2px solid var(--yellow);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
  margin-top: 2px;
}

.consent-checkbox input:checked ~ .consent-checkbox__box {
  background-color: #F5C518;
  border-color: #F5C518;
}

.consent-checkbox input:checked ~ .consent-checkbox__box::after {
  content: '';
  display: block;
  width: 6px;
  height: 12px;
  border-right: 2.5px solid #000000;
  border-bottom: 2.5px solid #000000;
  transform: rotate(45deg);
  margin-top: -2px;
}

.consent-checkbox__label {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-light);
  font-weight: 500;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), opacity var(--transition), transform 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--yellow);
  color: var(--bg-dark);
}

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

.btn--primary:disabled {
  background: #444444;
  color: #777777;
  cursor: not-allowed;
  transform: none;
}

.btn--full {
  width: 100%;
  margin-top: auto;
}

/* ============================================
   Screen 2: Status Report
   ============================================ */

.status-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
  margin-top: 8px;
}

.status-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.status-choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.status-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f7f7f7;
  border: 3px solid transparent;
  border-radius: var(--radius);
  padding: 16px 8px 14px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  font-family: var(--font);
}

.status-card:active {
  transform: scale(0.97);
}

.status-card.selected {
  border-color: #F5C518;
  background-color: rgba(245, 197, 24, 0.15);
}

.status-card__illustration {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.status-card__illustration svg,
.status-card__illustration .birdie-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.status-card__label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.status-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  margin-bottom: 2px;
}

.status-card__icon--alive {
  color: #22c55e;
  background: rgba(34, 197, 94, 0.1);
}

.status-card__icon--dead {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
}

.status-card__text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.05em;
}

.status-card__desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.status-info {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  padding: 0 8px;
  margin-bottom: 24px;
}

/* ============================================
   Screen 3: Health Impacts
   ============================================ */

.impacts-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 28px;
  margin-top: 8px;
  line-height: 1.35;
}

.impacts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.impacts-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.impacts-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--yellow-dim);
  border-radius: var(--radius-sm);
}

.impacts-text {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.35;
}

.impacts-text--small {
  font-size: 0.9rem;
}

.impacts-ref {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 3px;
  font-style: italic;
}

/* ============================================
   Screen 4: Mitigation
   ============================================ */

.mitigation-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 4px;
  margin-top: 8px;
}

.mitigation-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.mitigation-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.mitigation-col__heading {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--yellow);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

/* Checkbox items */
.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.check-item input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.check-item__box {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 2px solid #555;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
}

.check-item input:checked ~ .check-item__box {
  background-color: #F5C518;
  border-color: #F5C518;
}

.check-item input:checked ~ .check-item__box::after {
  content: '';
  display: block;
  width: 6px;
  height: 12px;
  border-right: 2.5px solid #000000;
  border-bottom: 2.5px solid #000000;
  transform: rotate(45deg);
  margin-top: -2px;
}

.check-item__label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-light);
}

/* ============================================
   Screen 5: Likert Scales
   ============================================ */

.likert-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 4px;
  margin-top: 8px;
}

.likert-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.likert-question {
  margin-bottom: 32px;
}

.likert-question__text {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 14px;
  line-height: 1.4;
}

.likert-scale {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.likert-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.25;
  width: 48px;
  flex-shrink: 0;
}

.likert-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid #555;
  background: transparent;
  color: var(--text-light);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}

.likert-btn:active {
  transform: scale(0.92);
}

.likert-btn.selected {
  background-color: #F5C518;
  border-color: #F5C518;
  color: #000000;
}

/* ============================================
   Screen 6: Thank You
   ============================================ */

.thanks-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 24px;
}

.thanks-icon svg,
.thanks-icon .thanks-birdie-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

.thanks-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 12px;
}

.thanks-text {
  font-size: 0.95rem;
  color: #cccccc;
  line-height: 1.6;
  margin-bottom: 8px;
}

.thanks-countdown {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 20px;
  margin-bottom: 0;
}

/* ============================================
   Tablet+ (480px+)
   ============================================ */

@media (min-width: 480px) {
  .screen__content {
    padding: 32px 32px 48px;
  }

  .consent-body p {
    font-size: 0.95rem;
  }

  .status-card__illustration {
    height: 140px;
  }

  .likert-btn {
    width: 48px;
    height: 48px;
  }

  .likert-label {
    font-size: 0.7rem;
  }
}