/* src/css/app.css — Component styles for Micro Science
 * DS §3 components + E3/E4 screen styles.
 * Precedence: DS §2 token > DS §3 table > prototype literal.
 */

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

body {
  background-color: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ── App viewport ── */
.app-viewport {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

/* ── Header ── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 3px dashed var(--primitive-slate-200);
}

.app-header.is-hidden {
  display: none;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-icon-svg {
  width: 54px;
  height: 54px;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 6px rgba(37, 99, 235, 0.2));
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}

.brand-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  font-weight: 700;
}

.header-stars-pill {
  background: var(--primitive-amber-100);
  border: 2.5px solid var(--primitive-amber-300);
  border-radius: var(--radius-full);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--primitive-amber-900);
  font-size: var(--font-size-base);
  box-shadow: 0 3px 0 var(--color-secondary);
}

.header-stars-pill .star-icon {
  width: 22px;
  height: 22px;
}

/* ── Section screens ── */
section[data-screen] {
  display: none;
}

section[data-screen]:not([hidden]) {
  display: block;
}

/* ── Chunky Clay Buttons ── */
.clay-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: var(--touch-primary);
  min-width: var(--touch-min);
  padding: 12px 28px;
  border-radius: var(--radius-full);
  border: var(--border-width-clay) solid transparent;
  font-family: var(--button-font-family);
  font-size: var(--button-font-size);
  font-weight: var(--button-font-weight);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.12s ease;
  touch-action: manipulation;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  line-height: 1;
}

.clay-btn:active {
  transform: translateY(4px);
}

.clay-btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.clay-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.clay-btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary-hover);
  box-shadow: var(--button-shadow-primary);
}

.clay-btn-primary:active {
  box-shadow: 0 2px 0 var(--color-primary-shadow);
}

.clay-btn-primary:disabled:active {
  box-shadow: var(--button-shadow-primary);
}

.clay-btn-secondary {
  background: var(--color-secondary);
  color: var(--color-on-secondary);
  border-color: var(--color-secondary-hover);
  box-shadow: var(--button-shadow-secondary);
  min-height: 52px;
}

.clay-btn-secondary:active {
  box-shadow: 0 2px 0 var(--color-secondary-shadow);
}

.clay-btn-accent {
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent-hover);
  box-shadow: var(--button-shadow-accent);
  min-height: 52px;
}

.clay-btn-accent:active {
  box-shadow: 0 2px 0 var(--color-accent-shadow);
}

.clay-btn-audio {
  background: var(--primitive-white);
  color: var(--color-primary);
  border-color: var(--primitive-blue-200);
  box-shadow: var(--button-shadow-audio);
  min-height: 48px;
  padding: 8px 20px;
  font-size: var(--font-size-base);
}

.clay-btn-audio:active {
  box-shadow: 0 2px 0 var(--primitive-blue-200);
}

.clay-btn-nav-back {
  background: var(--primitive-slate-200);
  color: var(--primitive-slate-700);
  border-color: var(--primitive-slate-300);
  box-shadow: 0 4px 0 var(--primitive-slate-400);
  min-height: 48px;
  padding: 8px 20px;
  font-size: var(--font-size-base);
}

.clay-btn-nav-back:active {
  box-shadow: 0 2px 0 var(--primitive-slate-400);
}

.clay-btn-nav-back:hover,
.clay-btn-primary:hover,
.clay-btn-secondary:hover,
.clay-btn-accent:hover,
.clay-btn-audio:hover {
  filter: brightness(1.04);
  cursor: pointer;
}

/* ── Start screen ── */
.start-screen-card {
  text-align: center;
  padding: 40px 20px;
  background: radial-gradient(circle at top, var(--primitive-blue-50) 0%, var(--primitive-blue-100) 100%);
  border-radius: var(--radius-lg);
  border: 3px solid var(--primitive-blue-200);
}

.start-hero-art {
  width: 140px;
  height: 140px;
  margin: 0 auto 20px;
  animation: floatSoft 3s ease-in-out infinite;
}

.start-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--primitive-blue-900);
  margin-bottom: 8px;
  line-height: var(--line-height-tight);
}

.start-desc {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primitive-slate-700);
  margin-bottom: 28px;
}

/* ── Speech warning ── */
.speech-warning-icon {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
}

/* ── Home screen ── */
.section-headline {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 800;
  color: var(--primitive-blue-900);
  margin-bottom: 6px;
}

.section-subtext {
  color: var(--color-muted);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 24px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.topic-card {
  background: #FFFFFF;
  border: var(--border-width-clay) solid var(--color-card-border);
  border-radius: var(--radius-md);
  padding: 24px 18px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  -webkit-appearance: none;
  appearance: none;
  box-shadow: 0 8px 0 var(--primitive-slate-300), 0 16px 24px rgba(37, 99, 235, 0.06);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  min-height: 170px;
  position: relative;
  touch-action: manipulation;
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 0 var(--primitive-slate-400), 0 16px 24px rgba(37, 99, 235, 0.12);
}

.topic-card:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--primitive-slate-400);
}

.topic-card:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.topic-illustration-pod {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  border: 3px solid;
}

.pod-animals {
  background: var(--primitive-amber-100);
  border-color: var(--primitive-amber-300);
}

.pod-plants {
  background: var(--primitive-emerald-100);
  border-color: var(--primitive-emerald-200);
}

.pod-space {
  background: var(--primitive-blue-100);
  border-color: var(--primitive-blue-200);
}

.pod-logic {
  background: #FCE7F3;
  border-color: #F9A8D4;
}

.topic-card-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: var(--primitive-slate-800);
  line-height: var(--line-height-tight);
  margin-bottom: 10px;
}

.topic-stars-row {
  display: flex;
  gap: 4px;
  align-items: center;
}

.star-icon {
  width: 24px;
  height: 24px;
}

.star-gold {
  filter: drop-shadow(0 2px 3px rgba(245, 158, 11, 0.4));
}

.star-empty {
  filter: grayscale(1);
  opacity: 0.45;
}

.home-footer {
  margin-top: 28px;
  text-align: center;
}

/* ── Feedback toast ── */
.feedback-toast {
  border-radius: var(--feedback-radius);
  padding: var(--feedback-padding);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  font-weight: 700;
  font-size: 17px;
}

.toast-gentle {
  background: var(--feedback-gentle-bg);
  border: var(--feedback-gentle-border);
  color: var(--feedback-gentle-text);
}

.toast-success {
  background: var(--feedback-success-bg);
  border: var(--feedback-success-border);
  color: var(--feedback-success-text);
}

/* ── Credits ── */
.credits-panel {
  background: var(--primitive-slate-100);
  border: 3px solid var(--primitive-slate-200);
  border-radius: var(--radius-md);
  padding: 24px;
}

.credits-text {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 20px;
  list-style: disc;
  padding-left: 20px;
}

.credits-text li {
  margin-bottom: 8px;
}

.credits-text a {
  color: var(--color-primary);
  text-decoration: underline;
  font-weight: 700;
}

.credits-text a:hover {
  color: var(--color-primary-hover);
}

.reset-guard-box {
  background: #FFFFFF;
  border: 2px dashed var(--primitive-slate-300);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.reset-guard-label {
  font-weight: 700;
  color: var(--primitive-slate-800);
  font-size: var(--font-size-sm);
}

.reset-guard-desc {
  font-size: var(--font-size-xs);
  color: var(--primitive-slate-500);
}

.reset-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primitive-slate-100);
  color: var(--primitive-slate-500);
  border: 2px solid var(--primitive-slate-300);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  min-height: var(--touch-min);
  font-family: var(--font-heading);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  -webkit-touch-callout: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.reset-btn.is-holding {
  background: #FEE2E2;
  border-color: #EF4444;
  color: var(--primitive-pink-800);
}

.reset-btn:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

/* ── Lesson screen ── */
.lesson-stage-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  border: var(--border-width-clay) solid var(--color-card-border);
  padding: 24px;
}

.lesson-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.step-pill {
  background: var(--primitive-blue-100);
  color: var(--primitive-blue-800);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 15px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 2px solid var(--primitive-blue-200);
}

.lesson-visual-window {
  background: linear-gradient(180deg, #E0F2FE 0%, #BAE6FD 100%);
  border: var(--border-width-clay) solid #7DD3FC;
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  margin-bottom: 24px;
  box-shadow: inset 0 3px 6px rgba(0,0,0,0.05);
  position: relative;
  overflow: hidden;
  min-height: 200px;
}

.lesson-art-scene {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 12px;
  flex-wrap: wrap;
  min-height: 140px;
}

.scene-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.scene-svg {
  width: 84px;
  height: 84px;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.scene-label {
  background: #FFFFFF;
  color: #0369A1;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 15px;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  border: 1.5px solid #7DD3FC;
}

.narration-box {
  background: var(--primitive-slate-50);
  border: 3px solid var(--primitive-slate-200);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.narration-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primitive-slate-900);
  line-height: 1.4;
  flex: 1;
}

.lesson-nav-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Quiz screen ── */
.quiz-question-banner {
  background: var(--primitive-amber-100);
  border: var(--border-width-clay) solid var(--primitive-amber-300);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 4px 0 var(--color-secondary);
}

.quiz-question-text {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: var(--primitive-amber-900);
}

.quiz-progress {
  margin-bottom: 16px;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.quiz-choice-card {
  background: #FFFFFF;
  border: var(--border-width-clay) solid var(--primitive-slate-300);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  min-height: 180px;
  box-shadow: 0 6px 0 var(--primitive-slate-300);
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.15s ease;
  touch-action: manipulation;
  font-family: inherit;
  font-size: inherit;
  -webkit-appearance: none;
  appearance: none;
}

.quiz-choice-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 0 var(--primitive-slate-400);
  border-color: var(--primitive-slate-400);
}

.quiz-choice-card:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 var(--primitive-slate-400);
}

.quiz-choice-card:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

.quiz-choice-card:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.quiz-choice-card.is-correct {
  border-color: var(--color-success-border);
  background: var(--color-success-bg);
  box-shadow: 0 6px 0 var(--color-success);
}

.quiz-choice-card.is-gentle-wrong {
  border-color: var(--primitive-amber-300);
  background: var(--primitive-amber-50);
  box-shadow: 0 6px 0 var(--color-secondary);
}

.choice-svg {
  width: 80px;
  height: 80px;
}

.choice-label {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: var(--primitive-slate-800);
}

.quiz-footer-nav {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

/* ── Sequence strip (logic topic) ── */
.sequence-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  list-style: none;
  padding: 12px;
  margin-bottom: 20px;
  background: var(--primitive-slate-50);
  border: 2px dashed var(--color-card-border);
  border-radius: var(--radius-md);
}

.sequence-item {
  display: flex;
  align-items: center;
}

.sequence-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border: var(--border-width-clay) dashed var(--color-card-border);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 800;
  color: var(--primitive-slate-400);
}

/* ── Reward / Celebration screen ── */
.celebration-box {
  text-align: center;
  background: radial-gradient(circle at center, var(--primitive-amber-100) 0%, var(--primitive-amber-50) 70%);
  border: var(--border-width-clay) solid var(--primitive-amber-300);
  border-radius: var(--radius-lg);
  padding: 36px 20px;
  box-shadow: 0 8px 0 var(--color-secondary), 0 16px 28px rgba(245, 158, 11, 0.2);
  position: relative;
  overflow: hidden;
}

.star-burst-cluster {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.big-reward-star {
  width: var(--star-reward-size);
  height: var(--star-reward-size);
}

.big-reward-star.star-gold {
  animation: starPop 1.5s ease-in-out infinite alternate;
}

.big-reward-star.star-gold:nth-child(2) {
  animation-delay: 0.2s;
}

.big-reward-star.star-gold:nth-child(3) {
  animation-delay: 0.4s;
}

.big-reward-star.star-gold:nth-child(4) {
  animation-delay: 0.6s;
}

.celebration-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  color: var(--primitive-amber-900);
  margin-bottom: 8px;
}

.celebration-sub {
  font-size: 19px;
  color: #92400E;
  font-weight: 700;
  margin-bottom: 24px;
}

.reward-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Keyframes ── */
@keyframes floatSoft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes gentleWobble {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

@keyframes starPop {
  0% { transform: scale(0.95); }
  100% { transform: scale(1.08); }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── Responsive: max-width 600px (phone) ── */
@media (max-width: 600px) {
  .app-viewport { padding: 12px 10px; }
  .start-title { font-size: 26px; }
  .topic-grid { grid-template-columns: 1fr; }
  .quiz-options-grid { grid-template-columns: 1fr; }
  .brand-title { font-size: 22px; }
  .header-stars-pill { font-size: 15px; padding: 6px 12px; }
  .clay-btn { font-size: 17px; padding: 10px 20px; }
}

/* ── Projector zoom ── */
@media (min-width: 1600px) {
  html { zoom: 1.25; }
}