/* ==========================================================================
   PITH QUIZ — Protocol Builder (Light Theme)
   Inherits shared.css tokens. Only quiz-specific styles here.
   ========================================================================== */

/* ---------- PROGRESS BAR ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-border);
  z-index: 200;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  width: 0%;
  transition: width 600ms cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 0 2px 2px 0;
}

/* ---------- SCREENS ---------- */
.screen {
  display: none;
  min-height: 100vh;
  min-height: 100dvh;
}

.screen--active {
  display: flex;
}

.screen__inner {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
}

.screen__inner--centered {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 100vh;
  min-height: 100dvh;
}

.screen__inner--question {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
}

.screen__inner--results {
  max-width: 640px;
  padding-top: calc(80px + var(--space-2xl));
  padding-bottom: var(--space-2xl);
}

/* ---------- INTRO SCREEN ---------- */
.intro__radial {
  width: clamp(200px, 50vw, 300px);
  height: auto;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
  animation: radial-spin 60s linear infinite;
}

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

.intro__eyebrow {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.intro__title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.15;
  margin-bottom: var(--space-md);
  max-width: 480px;
  color: var(--color-text);
}

.intro__subtitle {
  color: var(--color-text-secondary);
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  line-height: 1.6;
  margin-bottom: var(--space-xl);
  max-width: 420px;
}

.intro__note {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

/* ---------- QUESTION SCREEN ---------- */
.question-header {
  margin-bottom: var(--space-lg);
}

.question-step {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}

.question-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.question-subtitle {
  color: var(--color-text-muted);
  font-size: var(--text-small);
  margin-bottom: var(--space-lg);
}

.options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  cursor: pointer;
  transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  width: 100%;
}

.option:hover {
  border-color: rgba(184, 92, 56, 0.2);
  background: rgba(184, 92, 56, 0.04);
}

.option--selected {
  border-color: var(--color-accent);
  background: rgba(184, 92, 56, 0.06);
}

.option__icon {
  font-size: 1.5rem;
  width: 2rem;
  text-align: center;
  flex-shrink: 0;
}

.option__content {
  flex: 1;
}

.option__label {
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: 1rem;
  display: block;
  margin-bottom: 2px;
  color: var(--color-text);
}

.option__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: block;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

/* Transition for question changes */
.options--exit {
  animation: slide-out 250ms ease-in forwards;
}

.options--enter {
  animation: slide-in 300ms ease-out forwards;
}

@keyframes slide-out {
  to {
    opacity: 0;
    transform: translateX(-20px);
  }
}

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ---------- LOADING SCREEN ---------- */
.loading-animation {
  width: 160px;
  height: 160px;
  margin-bottom: var(--space-lg);
}

.loading-rings {
  width: 100%;
  height: 100%;
}

.loading-ring {
  transform-origin: center;
  stroke-dasharray: 50 450;
  stroke-linecap: round;
}

.loading-ring--1 {
  animation: ring-spin 3s linear infinite;
}

.loading-ring--2 {
  animation: ring-spin 2.2s linear infinite reverse;
}

.loading-ring--3 {
  animation: ring-spin 1.8s linear infinite;
}

.loading-dot {
  animation: ring-spin 3s linear infinite;
  transform-origin: 100px 100px;
}

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

.loading-text {
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  animation: pulse-text 2s ease-in-out infinite;
}

@keyframes pulse-text {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ---------- RESULTS SCREEN ---------- */
.results__eyebrow {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.results__title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.results__summary {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: var(--space-xl);
}

/* Protocol cards */
.protocol-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.protocol-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  overflow: hidden;
  animation: card-in 500ms ease-out backwards;
  box-shadow: var(--shadow-sm);
}

.protocol-card:nth-child(1) { animation-delay: 200ms; }
.protocol-card:nth-child(2) { animation-delay: 400ms; }
.protocol-card:nth-child(3) { animation-delay: 600ms; }
.protocol-card:nth-child(4) { animation-delay: 800ms; }

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
}

.protocol-card__accent {
  height: 3px;
}

.protocol-card__body {
  padding: var(--space-md);
}

.protocol-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-xs);
}

.protocol-card__name {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 600;
  color: var(--color-text);
}

.protocol-card__tag {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2em 0.6em;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.protocol-card__domain {
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.protocol-card__desc {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
}

.protocol-card__evidence {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

.protocol-card__evidence-bar {
  width: 60px;
  height: 4px;
  background: rgba(26, 26, 30, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

.protocol-card__evidence-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 800ms ease-out;
}

/* Card color variants */
.protocol-card--creatine .protocol-card__accent { background: var(--color-creatine); }
.protocol-card--creatine .protocol-card__tag { background: rgba(90,154,122,0.12); color: var(--color-creatine); }
.protocol-card--creatine .protocol-card__evidence-fill { background: var(--color-creatine); }

.protocol-card--energy .protocol-card__accent { background: var(--color-energy); }
.protocol-card--energy .protocol-card__tag { background: rgba(184,92,56,0.12); color: var(--color-energy); }
.protocol-card--energy .protocol-card__evidence-fill { background: var(--color-energy); }

.protocol-card--ashwagandha .protocol-card__accent { background: var(--color-ashwagandha); }
.protocol-card--ashwagandha .protocol-card__tag { background: rgba(123,104,174,0.12); color: var(--color-ashwagandha); }
.protocol-card--ashwagandha .protocol-card__evidence-fill { background: var(--color-ashwagandha); }

.protocol-card--magnesium .protocol-card__accent { background: var(--color-magnesium); }
.protocol-card--magnesium .protocol-card__tag { background: rgba(74,141,183,0.12); color: var(--color-magnesium); }
.protocol-card--magnesium .protocol-card__evidence-fill { background: var(--color-magnesium); }

/* Protocol card link */
.protocol-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.25em;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent);
  margin-top: var(--space-xs);
  text-transform: none;
  letter-spacing: normal;
}

.protocol-card__link:hover {
  text-decoration: underline;
}

/* Why section */
.why-section {
  margin-bottom: var(--space-xl);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-sm);
}

.why-title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.why-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.why-point {
  display: flex;
  align-items: flex-start;
  gap: var(--space-xs);
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.why-point__bullet {
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Measure section */
.measure-section {
  margin-bottom: var(--space-xl);
}

.measure-title {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.measure-desc {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.measure-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.measure-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-left: 3px solid var(--color-border);
  background: rgba(250, 250, 247, 0.5);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.measure-card__icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.measure-card__text {
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.measure-card__text strong {
  color: var(--color-text);
  font-weight: 500;
}

/* Results CTA */
.results-cta {
  text-align: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: linear-gradient(to bottom, rgba(184,92,56,0.03), transparent);
}

.results-price {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.results-price .price-amount {
  color: var(--color-text);
}

.results-price .price-period {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

.results-price .price-includes {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

.results-note {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

/* Protocol link button */
.results-protocol-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-top: var(--space-md);
}

/* Email capture */
.email-capture {
  text-align: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.email-capture__text {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.email-form {
  display: flex;
  gap: var(--space-xs);
  max-width: 400px;
  margin: 0 auto;
}

.email-input {
  flex: 1;
  padding: 0.75rem 1rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: var(--text-small);
  outline: none;
  transition: border-color 200ms;
}

.email-input::placeholder {
  color: var(--color-text-muted);
}

.email-input:focus {
  border-color: var(--color-accent);
}

.email-success {
  font-family: var(--font-ui);
  font-size: var(--text-small);
  color: var(--color-accent);
  margin-top: var(--space-sm);
}

/* Disclaimer */
.disclaimer {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.5;
  margin-top: var(--space-xl);
  opacity: 0.6;
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
}

/* Retake */
#btn-retake {
  display: block;
  margin: 0 auto var(--space-md);
}

/* Intro SVG circles — light theme adjustments */
.intro__radial circle {
  stroke: rgba(184, 92, 56, 0.15);
}

.intro__radial circle:last-child {
  fill: rgba(184, 92, 56, 0.06);
}

/* Loading rings — light theme */
.loading-ring--1 { stroke: rgba(196, 155, 92, 0.25); }
.loading-ring--2 { stroke: rgba(184, 92, 56, 0.25); }
.loading-ring--3 { stroke: rgba(196, 155, 92, 0.25); }
.loading-dot { fill: var(--color-accent); }

/* ---------- QUIZ NAV ---------- */
.quiz-nav {
  display: none;
}

.quiz-nav--visible {
  display: block;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 480px) {
  .screen__inner {
    padding: var(--space-md) var(--space-sm);
  }

  .email-form {
    flex-direction: column;
  }

  .option {
    padding: var(--space-sm) var(--space-md);
  }

  .protocol-card__header {
    flex-direction: column;
    gap: var(--space-xs);
  }
}