/*
 * home.css — index.html 전용 스타일
 */

/* ═══════════════════════════════════════
   Cover
═══════════════════════════════════════ */
.cover {
  min-height: 44svh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: var(--s10) var(--s6) var(--s5);
  background: transparent;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stars-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.cover__kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: var(--s6);
}

.cover__title {
  font-family: var(--f-serif);
  font-size: clamp(30px, 11vw, 45px);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.04em;
  margin-bottom: var(--s8);
}

.cover__animals {
  font-size: 22px;
  letter-spacing: 0.4em;
  margin-bottom: var(--s4);
  opacity: 0.65;
}

.cover__message {
  font-size: clamp(13px, 1.8vw, 15px);
  color: var(--c-muted);
  line-height: 1.9;
  letter-spacing: 0.04em;
  margin-top: var(--s6);
}

/* ═══════════════════════════════════════
   Heart Button
═══════════════════════════════════════ */
.heart-btn {
  display: block;
  margin: var(--s6) auto 0;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 90px;
  height: 84px;
  transition: transform 0.12s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  touch-action: manipulation;
}
.heart-btn:active { transform: scale(0.85); }
.heart-btn:not(.pop) { animation: heart-float 3s ease-in-out infinite; }
@keyframes heart-float {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-8px); }
}

.heart-btn__shape {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(145deg, #ffb3c6 0%, #ff3b6e 40%, #c0003c 100%);
  clip-path: path('M45 80 C45 80 5 54 5 27 C5 14 15 5 27 5 C35 5 42 10 45 17 C48 10 55 5 63 5 C75 5 85 14 85 27 C85 54 45 80 45 80 Z');
  box-shadow: 0 8px 24px rgba(255,60,100,0.4), inset 0 3px 8px rgba(255,255,255,0.3);
  position: relative;
}
.heart-btn__shape::after {
  content: '';
  position: absolute;
  top: 13%;
  left: 20%;
  width: 26%;
  height: 16%;
  background: rgba(255,255,255,0.6);
  border-radius: 50%;
  transform: rotate(-35deg);
  filter: blur(3px);
}
.heart-btn.pop {
  animation: heart-pop 0.35s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}
@keyframes heart-pop {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.45); }
  60%  { transform: scale(0.88); }
  100% { transform: scale(1); }
}

.heart-particle {
  position: fixed;
  pointer-events: none;
  font-size: 22px;
  z-index: 9999;
  animation: heart-fly var(--dur, 0.9s) ease-out forwards;
}
@keyframes heart-fly {
  0%   { opacity: 1; transform: translate(0, 0) scale(1) rotate(var(--rot, 0deg)); }
  100% { opacity: 0; transform: translate(var(--tx, 0px), var(--ty, -120px)) scale(0.5) rotate(var(--rot2, 20deg)); }
}

/* ═══════════════════════════════════════
   Chapter List
═══════════════════════════════════════ */
.chapters {
  padding: var(--py) var(--s6);
}
.chapters__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.chapters__heading {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  margin-bottom: var(--s3);
}
.chapters__sub {
  font-size: 15px;
  color: var(--c-muted);
  margin-bottom: var(--s12);
}

.chapter-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s5);
}

/* ── Chapter Card 색상 테마 ── */
[data-ch="01"] { --ch-c1: #FF6B6B; --ch-c2: #FF8E53; --ch-shadow: rgba(255,107,107,0.28); }
[data-ch="02"] { --ch-c1: #5B9CF6; --ch-c2: #3B82F6; --ch-shadow: rgba(91,156,246,0.28); }
[data-ch="03"] { --ch-c1: #A78BFA; --ch-c2: #7C3AED; --ch-shadow: rgba(167,139,250,0.28); }

/* Chapter Card — base */
.chapter-card {
  position: relative;
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 20px;
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
  text-decoration: none;
  color: inherit;
}

/* 상단 컬러 띠 */
.chapter-card__band {
  height: 5px;
  background: linear-gradient(90deg, var(--ch-c1), var(--ch-c2));
}

/* 내용 영역 패딩 */
.chapter-card__num,
.chapter-card__flag,
.chapter-card__name,
.chapter-card__date,
.chapter-card__cta {
  padding-left: var(--s5);
  padding-right: var(--s5);
}
.chapter-card__num  { padding-top: var(--s5); }
.chapter-card__cta  { padding-bottom: var(--s5); }

/* Chapter Card — active */
.chapter-card--active {
  box-shadow: 0 6px 28px var(--ch-shadow), 0 1px 3px rgba(0,0,0,0.06);
}
.chapter-card--active:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 16px 40px var(--ch-shadow), 0 2px 8px rgba(0,0,0,0.08);
}

/* Chapter Card — locked */
.chapter-card--locked {
  opacity: 0.5;
  cursor: default;
  filter: grayscale(0.3);
}

.chapter-card__num {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--ch-c1), var(--ch-c2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: var(--s4);
  margin-bottom: var(--s3);
}

.chapter-card__flag {
  font-size: 48px;
  line-height: 1;
  margin-bottom: var(--s4);
}
.chapter-card__name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--s1);
}
.chapter-card__date {
  font-size: 11px;
  color: var(--c-muted);
  letter-spacing: 0.05em;
  flex: 1;
  margin-bottom: var(--s4);
}
.chapter-card__cta {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(90deg, var(--ch-c1), var(--ch-c2));
  padding: 7px 16px;
  border-radius: var(--r-full);
  margin-top: var(--s2);
  align-self: flex-start;
  margin-left: var(--s5);
  margin-bottom: var(--s5);
  transition: opacity 0.2s;
  box-shadow: 0 3px 10px var(--ch-shadow);
}
.chapter-card--active:hover .chapter-card__cta { opacity: 0.85; }

/* ═══════════════════════════════════════
   Portal (ハブ) — 旅 / 勉強 へのゲート
═══════════════════════════════════════ */
.portal {
  padding: var(--s2) var(--s6) var(--s12);
}
.portal__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.portal__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--s5);
}

.portal-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 188px;
  padding: var(--s6) var(--s5) var(--s5);
  border-radius: 22px;
  text-decoration: none;
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.portal-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--pc1), var(--pc2));
}
.portal-card::after {
  content: '';
  position: absolute;
  right: -50px; top: -50px;
  width: 180px; height: 180px;
  background: radial-gradient(circle, var(--pc-glow), transparent 70%);
  pointer-events: none;
}
.portal-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 38px var(--pc-shadow);
}
.portal-card:active { transform: scale(0.99); }
.portal-card--travel {
  --pc1: #FF8E53; --pc2: #B86040;
  --pc-glow: rgba(184, 96, 64, 0.18);
  --pc-shadow: rgba(184, 96, 64, 0.26);
}
.portal-card--study {
  --pc1: #2EA060; --pc2: #217346;
  --pc-glow: rgba(33, 115, 70, 0.16);
  --pc-shadow: rgba(33, 115, 70, 0.26);
}
.portal-card__emoji {
  font-size: 46px;
  line-height: 1;
  margin-bottom: var(--s4);
}
.portal-card__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-faint);
  margin-bottom: var(--s2);
}
.portal-card__title {
  font-family: var(--f-serif);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--s3);
}
.portal-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}
.portal-card__desc {
  font-size: 13px;
  color: var(--c-muted);
  line-height: 1.75;
}
.portal-card__go {
  margin-top: var(--s4);
  align-self: flex-start;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(90deg, var(--pc1), var(--pc2));
  padding: 9px 20px;
  border-radius: var(--r-full);
  box-shadow: 0 4px 14px var(--pc-shadow);
  transition: opacity 0.2s;
}
.portal-card:hover .portal-card__go { opacity: 0.9; }

/* モバイル/アプリ: 横並びのコンパクトカードで、スクロール少なく「タップで移動」 */
@media (max-width: 600px) {
  .portal { padding: var(--s4) var(--s5) var(--s10); }
  .portal__grid { grid-template-columns: 1fr; gap: var(--s4); }
  .portal-card {
    flex-direction: row;
    align-items: center;
    min-height: 0;
    padding: var(--s4) var(--s5);
    gap: var(--s4);
  }
  .portal-card::after { display: none; }
  .portal-card__emoji { font-size: 38px; margin-bottom: 0; flex-shrink: 0; }
  .portal-card__label { display: none; }
  .portal-card__title { font-size: 18px; margin-bottom: 2px; }
  .portal-card__desc { font-size: 12px; line-height: 1.5; }
  .portal-card__go {
    margin-top: 0;
    flex-shrink: 0;
    padding: 8px 14px;
  }
}

/* モーションを抑える設定の端末は控えめに */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none !important; }
  .portal-card { transition: none; }
  .portal-card:hover { transform: none; }
}

/* ═══════════════════════════════════════
   Home Back Link (sub-pages)
═══════════════════════════════════════ */
.home-back {
  position: fixed;
  top: var(--s4);
  left: var(--s4);
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-muted);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 8px 14px;
  border-radius: var(--r-full);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: var(--sh-sm);
  transition: transform 0.2s, color 0.2s;
}
.home-back:hover { transform: translateX(-2px); color: var(--c-text); }

/* ═══════════════════════════════════════
   Footer
═══════════════════════════════════════ */
.site-footer {
  padding: var(--s12) var(--s6);
  text-align: center;
  border-top: 1px solid var(--c-border);
}
.site-footer p {
  font-size: 13px;
  color: var(--c-faint);
  letter-spacing: 0.08em;
}

/* ═══════════════════════════════════════
   Responsive
═══════════════════════════════════════ */
@media (max-width: 640px) {
  .chapter-list { grid-template-columns: 1fr; }
}