/* =============================================
   Flower Hokkaido — Shared Stylesheet
   ============================================= */

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

:root {
  --c-lavender:    #7C3AED;
  --c-lavender-lt: #C4B5FD;
  --c-lavender-dk: #4C1D95;
  --c-sakura:      #F9A8D4;
  --c-sakura-dk:   #DB2777;
  --c-hamanasu:    #FB7185;
  --c-hamanasu-dk: #9F1239;
  --c-sun:         #FCD34D;
  --c-sun-dk:      #B45309;
  --c-leaf:        #059669;
  --c-leaf-lt:     #A7F3D0;
  --c-sky:         #7DD3FC;
  --c-cream:       #FFFBEB;
  --c-white:       #FFFFFF;
  --c-dark:        #1C1917;
  --c-mid:         #57534E;
  --c-border:      rgba(124,58,237,.12);
  --nav-h:         64px;
  --radius-card:   20px;
  --radius-pill:   999px;
  --shadow-sm:     0 2px 12px rgba(0,0,0,.06);
  --shadow-md:     0 8px 28px rgba(0,0,0,.10);
  --shadow-lg:     0 16px 48px rgba(0,0,0,.14);
  --trans:         .25s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
  color: var(--c-dark);
  background: var(--c-cream);
  line-height: 1.75;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; }

/* ----- Floating Petals (fixed overlay) ----- */
@keyframes floatUp {
  0%   { transform: translateY(0) rotate(0deg) scale(1);   opacity: 0; }
  8%   { opacity: .65; }
  92%  { opacity: .3; }
  100% { transform: translateY(-105vh) rotate(400deg) scale(.6); opacity: 0; }
}
.petals { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.petal  { position: absolute; bottom: -50px; border-radius: 50% 0 50% 0; animation: floatUp linear infinite; opacity: 0; }
.petal:nth-child(1)  { width:12px;height:16px;background:var(--c-sakura);    left: 4%;animation-duration:13s;animation-delay: 0s; }
.petal:nth-child(2)  { width: 8px;height:12px;background:var(--c-lavender-lt);left:13%;animation-duration:16s;animation-delay: 2s; }
.petal:nth-child(3)  { width:14px;height:10px;background:var(--c-sakura-dk); left:23%;animation-duration:11s;animation-delay: 5s; }
.petal:nth-child(4)  { width:10px;height:14px;background:var(--c-lavender);  left:34%;animation-duration:15s;animation-delay: 1s; }
.petal:nth-child(5)  { width:15px;height:11px;background:var(--c-sakura);    left:44%;animation-duration:12s;animation-delay: 4s; }
.petal:nth-child(6)  { width: 9px;height:13px;background:var(--c-hamanasu); left:55%;animation-duration:14s;animation-delay: 7s; }
.petal:nth-child(7)  { width:11px;height: 9px;background:var(--c-lavender-lt);left:65%;animation-duration:17s;animation-delay: 3s; }
.petal:nth-child(8)  { width:13px;height:11px;background:var(--c-sakura);    left:76%;animation-duration:10s;animation-delay: 6s; }
.petal:nth-child(9)  { width: 7px;height:15px;background:var(--c-lavender);  left:86%;animation-duration:13s;animation-delay: 9s; }
.petal:nth-child(10) { width:16px;height: 8px;background:var(--c-hamanasu); left:93%;animation-duration:15s;animation-delay: 0s; }

/* ----- Header / Nav ----- */
.site-header {
  position: sticky; top: 0; z-index: 200;
  height: var(--nav-h);
  background: rgba(255,251,235,.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.nav-inner {
  max-width: 1140px; margin: 0 auto; padding: 0 1.5rem;
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: .45rem;
  font-size: 1.15rem; font-weight: 800; color: var(--c-lavender-dk);
  text-decoration: none; letter-spacing: .02em; white-space: nowrap;
}
.nav-logo .logo-icon { font-size: 1.6rem; }

/* Desktop links */
.nav-links { display: flex; gap: 1.8rem; list-style: none; align-items: center; }
.nav-links a {
  text-decoration: none; font-size: .9rem; font-weight: 500;
  color: var(--c-mid); transition: color var(--trans); padding: .2em 0;
  border-bottom: 2px solid transparent; transition: color var(--trans), border-color var(--trans);
}
.nav-links a:hover, .nav-links a.active { color: var(--c-lavender); border-bottom-color: var(--c-lavender); }
.nav-links .nav-cta a {
  background: var(--c-lavender); color: #fff; padding: .4em 1.1em;
  border-radius: var(--radius-pill); border-bottom: none;
  transition: background var(--trans), transform var(--trans);
}
.nav-links .nav-cta a:hover { background: var(--c-lavender-dk); transform: translateY(-1px); }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: .4rem; z-index: 210;
}
.hamburger span {
  display: block; width: 24px; height: 2px; background: var(--c-lavender-dk);
  border-radius: 2px; transition: transform var(--trans), opacity var(--trans);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  display: none; position: fixed; inset: var(--nav-h) 0 0 0;
  background: rgba(255,251,235,.97); backdrop-filter: blur(20px);
  z-index: 199; flex-direction: column; align-items: center; justify-content: center;
  gap: 2rem;
}
.nav-drawer.open { display: flex; }
.nav-drawer a {
  font-size: 1.4rem; font-weight: 700; color: var(--c-lavender-dk);
  text-decoration: none; letter-spacing: .05em;
}
.nav-drawer a:hover { color: var(--c-sakura-dk); }

/* ----- Section Commons ----- */
.section-inner { max-width: 1140px; margin: 0 auto; padding: 5rem 1.5rem; }
.section-tag {
  display: block; font-size: .72rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--c-lavender); margin-bottom: .5rem; font-weight: 600;
}
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800;
  line-height: 1.2; margin-bottom: .9rem;
}
.section-lead { font-size: 1rem; color: var(--c-mid); max-width: 500px; margin-bottom: 2.8rem; }

/* ----- Photo Cards ("Photo art" using CSS gradients + patterns) ----- */
/* These are CSS-art panels; replace src="" in <img> with real Unsplash/Pixabay URLs anytime */
.photo-panel {
  position: relative; overflow: hidden; border-radius: var(--radius-card);
  aspect-ratio: 4/3; display: flex; align-items: flex-end;
}
.photo-panel .photo-emoji {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 5rem; filter: drop-shadow(0 4px 16px rgba(0,0,0,.2));
  pointer-events: none;
}
.photo-panel .photo-label {
  position: relative; z-index: 2; width: 100%;
  padding: .8rem 1rem; background: linear-gradient(transparent, rgba(0,0,0,.45));
  color: #fff; font-size: .85rem; font-weight: 700; letter-spacing: .05em;
}

/* Individual gradient themes */
.bg-lavender {
  background:
    radial-gradient(ellipse 70% 50% at 30% 20%, rgba(221,214,254,.6) 0%, transparent 55%),
    radial-gradient(ellipse 80% 60% at 70% 80%, rgba(91,33,182,.45) 0%, transparent 55%),
    linear-gradient(145deg, #8B5CF6 0%, #5B21B6 45%, #2E1065 100%);
}
.bg-hamanasu {
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(254,205,211,.6) 0%, transparent 55%),
    radial-gradient(ellipse 70% 60% at 80% 70%, rgba(159,18,57,.4) 0%, transparent 55%),
    linear-gradient(145deg, #FB7185 0%, #E11D48 45%, #881337 100%);
}
.bg-sakura {
  background:
    radial-gradient(ellipse 80% 50% at 50% 10%, rgba(255,255,255,.4) 0%, transparent 50%),
    radial-gradient(ellipse 60% 60% at 30% 70%, rgba(219,39,119,.3) 0%, transparent 55%),
    linear-gradient(145deg, #FBCFE8 0%, #F472B6 40%, #DB2777 100%);
}
.bg-himawari {
  background:
    radial-gradient(ellipse 70% 40% at 50% 10%, rgba(255,255,255,.5) 0%, transparent 50%),
    radial-gradient(ellipse 60% 60% at 20% 80%, rgba(180,83,9,.35) 0%, transparent 55%),
    linear-gradient(145deg, #FEF08A 0%, #FBBF24 40%, #D97706 100%);
}
.bg-lupine {
  background:
    radial-gradient(ellipse 60% 50% at 30% 20%, rgba(224,231,255,.5) 0%, transparent 55%),
    radial-gradient(ellipse 70% 60% at 70% 80%, rgba(55,48,163,.4) 0%, transparent 55%),
    linear-gradient(145deg, #A5B4FC 0%, #6366F1 45%, #312E81 100%);
}
.bg-shibazakura {
  background:
    radial-gradient(ellipse 80% 40% at 50% 5%, rgba(255,255,255,.4) 0%, transparent 45%),
    radial-gradient(ellipse 60% 60% at 20% 75%, rgba(157,23,77,.3) 0%, transparent 55%),
    linear-gradient(145deg, #FBCFE8 0%, #EC4899 40%, #9D174D 100%);
}
.bg-cosmos {
  background:
    radial-gradient(ellipse 70% 50% at 30% 20%, rgba(254,215,170,.5) 0%, transparent 55%),
    linear-gradient(145deg, #FCA5A5 0%, #F87171 40%, #DC2626 100%);
}
.bg-ezo {
  background:
    radial-gradient(ellipse 60% 50% at 25% 30%, rgba(209,250,229,.5) 0%, transparent 55%),
    linear-gradient(145deg, #86EFAC 0%, #22C55E 40%, #15803D 100%);
}

/* ----- Flower Card (grid) ----- */
.flowers-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px,1fr)); gap: 1.4rem; }
.flower-card {
  background: var(--c-white); border-radius: var(--radius-card);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: transform var(--trans), box-shadow var(--trans);
}
.flower-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-photo { height: 180px; }
.card-body { padding: 1.1rem 1.3rem 1.4rem; }
.card-season { font-size: .72rem; letter-spacing: .12em; color: var(--c-lavender); font-weight: 700; margin-bottom: .3rem; }
.card-name   { font-size: 1.1rem; font-weight: 800; margin-bottom: .1rem; }
.card-name-en{ font-size: .78rem; color: var(--c-mid); font-style: italic; margin-bottom: .6rem; }
.card-desc   { font-size: .86rem; color: var(--c-mid); line-height: 1.65; }

/* ----- Spot Card ----- */
.spots-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px,1fr)); gap: 1.4rem; }
.spot-card {
  background: var(--c-white); border-radius: var(--radius-card);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: transform var(--trans), box-shadow var(--trans);
}
.spot-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.spot-photo { height: 200px; }
.spot-body { padding: 1.3rem 1.5rem 1.5rem; }
.spot-region { font-size: .72rem; letter-spacing: .14em; color: var(--c-lavender); font-weight: 700; margin-bottom: .3rem; }
.spot-name   { font-size: 1.2rem; font-weight: 800; margin-bottom: .6rem; }
.spot-desc   { font-size: .88rem; color: var(--c-mid); line-height: 1.65; margin-bottom: .8rem; }
.spot-badge  {
  display: inline-block; font-size: .75rem; font-weight: 700;
  background: rgba(124,58,237,.08); color: var(--c-lavender);
  padding: .3em .9em; border-radius: var(--radius-pill);
}

/* ----- Season Timeline ----- */
.seasons-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.2rem; }
.season-card {
  background: var(--c-white); border-radius: var(--radius-card); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: transform var(--trans), box-shadow var(--trans);
}
.season-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.season-header { padding: 1.8rem 1.4rem 1rem; text-align: center; }
.season-icon { font-size: 2.6rem; margin-bottom: .5rem; }
.season-en   { font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; color: var(--c-mid); display: block; margin-bottom: .25rem; }
.season-name { font-size: 1.1rem; font-weight: 800; }
.season-body { padding: 0 1.4rem 1.6rem; }
.season-flower-item {
  display: flex; align-items: center; gap: .55rem;
  font-size: .85rem; color: var(--c-mid); padding: .35rem 0;
  border-top: 1px solid rgba(0,0,0,.05);
}
.season-flower-item .dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
  background: var(--c-lavender);
}
.season-spring .dot { background: var(--c-sakura-dk); }
.season-summer .dot { background: var(--c-lavender); }
.season-autumn .dot { background: #F97316; }
.season-winter .dot { background: var(--c-sky); }

/* ----- Hero (shared base) ----- */
.page-hero {
  position: relative; overflow: hidden;
  min-height: min(520px, 70vw);
  display: flex; align-items: center; justify-content: center;
}
.page-hero-inner {
  position: relative; z-index: 2;
  text-align: center; padding: 5rem 1.5rem 4rem;
}
.page-hero h1 {
  font-size: clamp(1.8rem, 5vw, 3.2rem); font-weight: 800;
  line-height: 1.2; color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
  margin-bottom: .8rem;
}
.page-hero p {
  font-size: clamp(.95rem, 2vw, 1.1rem); color: rgba(255,255,255,.88);
  max-width: 480px; margin: 0 auto;
}
.page-hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(to bottom, rgba(0,0,0,.15) 0%, rgba(0,0,0,.35) 100%);
}

/* ----- Prefectural Flower Banner ----- */
.pref-banner {
  border-radius: 24px; overflow: hidden;
  background: linear-gradient(135deg, var(--c-lavender-dk), var(--c-hamanasu-dk));
  color: #fff; display: flex; align-items: center; gap: 2.5rem;
  padding: 3rem 2.8rem; flex-wrap: wrap;
}
.pref-banner-emoji { font-size: 5.5rem; flex-shrink: 0; filter: drop-shadow(0 4px 16px rgba(0,0,0,.25)); }
.pref-banner h2 { font-size: clamp(1.3rem,3vw,1.9rem); font-weight: 800; margin-bottom: .5rem; }
.pref-banner p  { font-size: .93rem; line-height: 1.8; opacity: .9; max-width: 460px; }

/* ----- Footer ----- */
.site-footer {
  background: var(--c-dark); color: rgba(255,255,255,.55);
  text-align: center; padding: 3rem 1.5rem; font-size: .85rem; line-height: 1.9;
}
.footer-logo { font-size: 1.1rem; font-weight: 800; color: var(--c-lavender-lt); margin-bottom: .4rem; }
.footer-nav  { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; margin: .8rem 0 1.2rem; }
.footer-nav a { color: rgba(255,255,255,.5); text-decoration: none; font-size: .85rem; transition: color var(--trans); }
.footer-nav a:hover { color: var(--c-lavender-lt); }
.footer-copy { font-size: .8rem; opacity: .5; }

/* ----- Utility ----- */
.badge {
  display: inline-block; font-size: .75rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--c-lavender-dk); background: rgba(196,181,253,.35);
  border: 1px solid rgba(124,58,237,.28); border-radius: var(--radius-pill);
  padding: .3em 1.1em; margin-bottom: 1.4rem;
}
.btn-primary {
  display: inline-flex; align-items: center; gap: .45rem;
  background: linear-gradient(135deg, var(--c-lavender-dk), var(--c-hamanasu-dk));
  color: #fff; text-decoration: none; padding: .8em 2em;
  border-radius: var(--radius-pill); font-size: .95rem; font-weight: 700;
  letter-spacing: .04em; box-shadow: 0 4px 20px rgba(124,58,237,.35);
  transition: transform var(--trans), box-shadow var(--trans);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(124,58,237,.45); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: .45rem;
  border: 2px solid var(--c-lavender); color: var(--c-lavender);
  text-decoration: none; padding: .7em 1.8em;
  border-radius: var(--radius-pill); font-size: .9rem; font-weight: 700;
  transition: background var(--trans), color var(--trans);
}
.btn-ghost:hover { background: var(--c-lavender); color: #fff; }

/* ----- Responsive ----- */
@media (max-width: 860px) {
  .seasons-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .section-inner { padding: 3.5rem 1.2rem; }
  .flowers-grid { grid-template-columns: repeat(2,1fr); gap: 1rem; }
  .spots-grid   { grid-template-columns: 1fr; }
  .seasons-grid { grid-template-columns: repeat(2,1fr); }
  .pref-banner  { flex-direction: column; text-align: center; padding: 2.2rem 1.6rem; gap: 1.2rem; }
  .pref-banner-emoji { font-size: 4rem; }
  .card-photo { height: 130px; }
  .photo-panel .photo-emoji { font-size: 3.5rem; }
}
@media (max-width: 400px) {
  .flowers-grid { grid-template-columns: 1fr; }
  .seasons-grid { grid-template-columns: 1fr; }
}