/* ============================================================
   ChronoDino — HOME.CSS
   ============================================================ */

/* ─── HERO ────────────────────────────────────────────────── */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(192,57,43,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(45,110,58,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(232,160,32,0.05) 0%, transparent 70%),
    var(--clr-void);
  z-index: 0;
}

/* Animated stars/particles */
.hero-stars {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-stars::before,
.hero-stars::after {
  content: '';
  position: absolute;
  width: 2px;
  height: 2px;
  background: rgba(232,160,32,0.6);
  border-radius: 50%;
  box-shadow:
    120px 80px rgba(245,234,208,0.3),
    340px 160px rgba(232,160,32,0.4),
    580px 90px rgba(245,234,208,0.2),
    740px 200px rgba(232,160,32,0.3),
    960px 140px rgba(245,234,208,0.4),
    1100px 60px rgba(232,160,32,0.2),
    200px 300px rgba(245,234,208,0.3),
    450px 380px rgba(232,160,32,0.2),
    800px 320px rgba(245,234,208,0.3),
    1050px 280px rgba(232,160,32,0.4),
    150px 480px rgba(245,234,208,0.2),
    600px 500px rgba(232,160,32,0.3),
    900px 450px rgba(245,234,208,0.4),
    1200px 420px rgba(232,160,32,0.2);
  animation: twinkle 4s ease-in-out infinite alternate;
}

.hero-stars::after {
  width: 1px;
  height: 1px;
  box-shadow:
    80px 120px rgba(245,234,208,0.4),
    260px 220px rgba(232,160,32,0.3),
    480px 160px rgba(245,234,208,0.5),
    660px 280px rgba(232,160,32,0.4),
    880px 180px rgba(245,234,208,0.3),
    1020px 340px rgba(232,160,32,0.5),
    300px 400px rgba(245,234,208,0.3),
    520px 460px rgba(232,160,32,0.4),
    720px 380px rgba(245,234,208,0.3),
    980px 500px rgba(232,160,32,0.2);
  animation-delay: 2s;
  animation-duration: 5s;
}

@keyframes twinkle {
  0%   { opacity: 0.4; }
  100% { opacity: 1; }
}

/* Ground silhouette */
.hero-ground {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 180px;
  background: linear-gradient(to top, var(--clr-earth) 0%, rgba(26,18,8,0.8) 60%, transparent 100%);
  z-index: 1;
}

/* Three.js canvas sits here */
#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

/* Hero content */
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: var(--sp-6);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--clr-amber);
  margin-bottom: var(--sp-6);
  opacity: 0;
  animation: heroFadeUp 0.8s ease 0.3s forwards;
}

.hero-eyebrow-line {
  display: block;
  width: 40px;
  height: 1px;
  background: var(--clr-amber);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.5rem);
  line-height: 1;
  color: var(--clr-bone);
  margin-bottom: var(--sp-4);
  opacity: 0;
  animation: heroFadeUp 0.8s ease 0.5s forwards;
}

.hero-title .highlight {
  color: var(--clr-amber);
  display: block;
  text-shadow: 0 0 60px rgba(232,160,32,0.4);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--clr-fossil);
  font-weight: 500;
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: var(--sp-10);
  line-height: 1.7;
  opacity: 0;
  animation: heroFadeUp 0.8s ease 0.7s forwards;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
  opacity: 0;
  animation: heroFadeUp 0.8s ease 0.9s forwards;
}

/* Get Started button special styling */
.btn-get-started {
  background: var(--clr-amber);
  color: var(--clr-void);
  font-family: var(--font-display);
  font-size: 1.15rem;
  padding: var(--sp-4) var(--sp-10);
  border-radius: var(--r-xl);
  box-shadow:
    0 0 0 0 rgba(232,160,32,0.4),
    var(--shadow-amber);
  animation: heroFadeUp 0.8s ease 0.9s forwards,
             pulse-glow 2.5s ease-in-out 2s infinite;
  position: relative;
  overflow: hidden;
}

.btn-get-started::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
}

.btn-get-started:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow:
    0 0 0 8px rgba(232,160,32,0.15),
    0 0 60px rgba(232,160,32,0.7);
}

.btn-get-started .btn-arrow {
  display: inline-block;
  transition: transform var(--t-med);
}

.btn-get-started:hover .btn-arrow {
  transform: translateX(4px);
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(232,160,32,0.4), 0 6px 24px rgba(0,0,0,0.45); }
  50%       { box-shadow: 0 0 50px rgba(232,160,32,0.7), 0 6px 24px rgba(0,0,0,0.45); }
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  opacity: 0;
  animation: heroFadeUp 0.8s ease 1.5s forwards;
}

.scroll-indicator-text {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-fossil);
}

.scroll-indicator-mouse {
  width: 22px;
  height: 36px;
  border: 2px solid rgba(232,160,32,0.4);
  border-radius: 11px;
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 6px;
}

.scroll-indicator-dot {
  width: 4px;
  height: 8px;
  background: var(--clr-amber);
  border-radius: 2px;
  animation: scrollDot 1.8s ease-in-out infinite;
}

@keyframes scrollDot {
  0%   { transform: translateY(0); opacity: 1; }
  70%  { transform: translateY(8px); opacity: 0.3; }
  100% { transform: translateY(0); opacity: 1; }
}

/* ─── INTRO SECTION ───────────────────────────────────────── */
.intro-section {
  padding-block: var(--sp-32) var(--sp-24);
  position: relative;
}

.intro-section::before {
  content: '🦴';
  position: absolute;
  top: var(--sp-12);
  right: 8%;
  font-size: 6rem;
  opacity: 0.04;
  transform: rotate(45deg);
  pointer-events: none;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}

.intro-text .section-label {
  margin-bottom: var(--sp-6);
}

.intro-text h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  color: var(--clr-bone);
  margin-bottom: var(--sp-6);
}

.intro-text h2 em {
  font-style: normal;
  color: var(--clr-amber);
}

.intro-text p {
  color: var(--clr-fossil);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: var(--sp-4);
}

.intro-visual {
  position: relative;
  aspect-ratio: 1;
  max-width: 480px;
  margin-inline: auto;
}

.intro-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(232,160,32,0.2);
  animation: spin 30s linear infinite;
}

.intro-ring-2 {
  inset: 15%;
  border: 1px dashed rgba(232,160,32,0.15);
  animation: spin 20s linear infinite reverse;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.intro-dino-big {
  position: absolute;
  inset: 20%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8rem;
  animation: floatUpDown 3s ease-in-out infinite;
  filter: drop-shadow(0 20px 40px rgba(232,160,32,0.3));
}

@keyframes floatUpDown {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-15px); }
}

/* Era dots around ring */
.era-dot {
  position: absolute;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform var(--t-med), box-shadow var(--t-med);
}

.era-dot:hover {
  transform: scale(1.2);
  box-shadow: var(--shadow-amber);
}

.era-dot.triassic {
  background: var(--era-triassic);
  color: white;
  top: 5%;
  left: 50%;
  transform: translateX(-50%);
}

.era-dot.jurassic {
  background: var(--era-jurassic);
  color: white;
  bottom: 10%;
  right: 5%;
}

.era-dot.cretaceous {
  background: var(--era-cretaceous);
  color: white;
  bottom: 10%;
  left: 5%;
}

/* ─── ERA PREVIEW STRIP ───────────────────────────────────── */
.eras-strip {
  padding-block: var(--sp-24);
  overflow: hidden;
}

.eras-strip .section-label {
  justify-content: center;
  margin-bottom: var(--sp-4);
}

.eras-strip h2 {
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: var(--sp-12);
  color: var(--clr-bone);
}

.era-cards-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.era-card {
  position: relative;
  border-radius: var(--r-xl);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
  transition: transform var(--t-med), box-shadow var(--t-med);
}

.era-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.era-card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform var(--t-slow);
}

.era-card:hover .era-card-bg {
  transform: scale(1.06);
}

.era-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0,0,0,0.9) 0%,
    rgba(0,0,0,0.4) 50%,
    rgba(0,0,0,0.1) 100%
  );
}

.era-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--sp-6);
}

.era-card-period {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-amber);
  margin-bottom: var(--sp-2);
}

.era-card-name {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--clr-bone);
  margin-bottom: var(--sp-3);
  line-height: 1.1;
}

.era-card-desc {
  font-size: 0.85rem;
  color: rgba(245,234,208,0.7);
  line-height: 1.6;
  margin-bottom: var(--sp-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.era-card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-amber);
  transition: gap var(--t-fast);
}

.era-card:hover .era-card-cta {
  gap: var(--sp-4);
}

/* Era accent colours */
.era-card[data-era="triassic"] .era-card-overlay {
  background: linear-gradient(to top, rgba(60,20,5,0.95) 0%, rgba(60,20,5,0.4) 50%, rgba(0,0,0,0.1) 100%);
}

.era-card[data-era="jurassic"] .era-card-overlay {
  background: linear-gradient(to top, rgba(5,30,10,0.95) 0%, rgba(5,30,10,0.4) 50%, rgba(0,0,0,0.1) 100%);
}

.era-card[data-era="cretaceous"] .era-card-overlay {
  background: linear-gradient(to top, rgba(40,5,5,0.95) 0%, rgba(40,5,5,0.4) 50%, rgba(0,0,0,0.1) 100%);
}

/* ─── FEATURE DINOS TEASER ────────────────────────────────── */
.dino-teaser {
  padding-block: var(--sp-24);
  background: var(--clr-earth);
  position: relative;
  overflow: hidden;
}

.dino-teaser::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(232,160,32,0.3), transparent);
}

.dino-teaser-header {
  text-align: center;
  margin-bottom: var(--sp-12);
}

.dino-teaser-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-top: var(--sp-4);
  color: var(--clr-bone);
}

/* Horizontal scroll on mobile */
.dino-teaser-scroll {
  overflow-x: auto;
  padding-bottom: var(--sp-4);
  scrollbar-width: thin;
  scrollbar-color: var(--clr-amber) transparent;
}

.dino-teaser-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-4);
  min-width: 900px;
}

/* Mini dino card */
.mini-dino-card {
  background: var(--clr-mud);
  border: 1px solid rgba(232,160,32,0.1);
  border-radius: var(--r-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--t-med), border-color var(--t-med), box-shadow var(--t-med);
  text-align: center;
}

.mini-dino-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: rgba(232,160,32,0.4);
  box-shadow: var(--shadow-md);
}

.mini-card-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  transition: transform var(--t-slow);
}

.mini-dino-card:hover .mini-card-img {
  transform: scale(1.08);
}

.mini-card-body {
  padding: var(--sp-3) var(--sp-3) var(--sp-4);
}

.mini-card-name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--clr-bone);
  margin-bottom: var(--sp-1);
  line-height: 1.2;
}

.mini-card-diet {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ─── FUN FACT BANNER ─────────────────────────────────────── */
.fun-fact-banner {
  padding-block: var(--sp-24);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.fun-fact-banner::before {
  content: '🌋';
  position: absolute;
  left: 5%;
  top: 50%;
  transform: translateY(-50%);
  font-size: 8rem;
  opacity: 0.06;
  pointer-events: none;
}

.fun-fact-banner::after {
  content: '☄️';
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  font-size: 8rem;
  opacity: 0.06;
  pointer-events: none;
}

.fun-fact-inner {
  max-width: 720px;
  margin-inline: auto;
  padding: var(--sp-12) var(--sp-8);
  background: rgba(232,160,32,0.05);
  border: 1px solid rgba(232,160,32,0.15);
  border-radius: var(--r-xl);
  position: relative;
}

.fun-fact-icon {
  font-size: 3rem;
  margin-bottom: var(--sp-4);
  display: block;
}

.fun-fact-label {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--clr-amber);
  margin-bottom: var(--sp-4);
}

.fun-fact-text {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 2rem);
  line-height: 1.4;
  color: var(--clr-bone);
}

/* ─── HOME RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 1024px) {
  .era-cards-row { gap: var(--sp-4); }
}

@media (max-width: 768px) {
  .intro-grid { grid-template-columns: 1fr; gap: var(--sp-8); }
  .intro-visual { display: none; }
  .era-cards-row { grid-template-columns: 1fr; gap: var(--sp-4); }
  .era-card { aspect-ratio: 16/9; }
  .dino-teaser-row { grid-template-columns: repeat(5, 200px); }
}

/* ─── QUIZ PROMO SECTION (home page) ─────────────────────── */
.home-quiz-section {
  padding-block: 5rem;
  background: var(--clr-void);
  position: relative;
  overflow: hidden;
}
.home-quiz-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(232,160,32,0.07) 0%, transparent 65%);
  pointer-events: none;
}
.quiz-promo-card {
  background: var(--clr-earth);
  border: 1px solid rgba(232,160,32,0.18);
  border-radius: var(--r-xl);
  padding: 3rem 2.5rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
  max-width: 860px;
  margin-inline: auto;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.quiz-promo-card:hover {
  border-color: rgba(232,160,32,0.4);
  box-shadow: 0 0 60px rgba(232,160,32,0.1);
}
.quiz-promo-badges {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.quiz-promo-badge {
  background: rgba(232,160,32,0.1);
  border: 1px solid rgba(232,160,32,0.22);
  border-radius: var(--r-pill);
  padding: 3px 12px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clr-amber);
}
.quiz-promo-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  color: var(--clr-bone);
  margin-bottom: .75rem;
  line-height: 1.2;
}
.quiz-promo-desc {
  font-size: 1rem;
  color: rgba(245,234,208,.78);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}
.quiz-promo-illustration {
  font-size: 5rem;
  line-height: 1;
  text-align: center;
  animation: quizBounce 3s ease-in-out infinite;
}
@keyframes quizBounce {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
@media (max-width: 640px) {
  .quiz-promo-card { grid-template-columns: 1fr; text-align: center; }
  .quiz-promo-badges { justify-content: center; }
  .quiz-promo-illustration { font-size: 3rem; }
}