:root{
  --bg1:#0b0612;
  --bg2:#16081f;
  --glass: rgba(255,255,255,.08);
  --stroke: rgba(255,255,255,.16);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.72);
  --hot: #ff4d7d;
  --rose: #ff2e6a;
  --rose2:#ff7aa2;
  --leaf:#2dd4a3;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color:var(--text);
  background: radial-gradient(1200px 800px at 20% 10%, #2a0f35 0%, transparent 55%),
              radial-gradient(900px 700px at 80% 30%, #3c0b2a 0%, transparent 60%),
              linear-gradient(180deg, var(--bg1), var(--bg2));
  overflow-x:hidden;
}

a{color:inherit; text-decoration:none}
img{max-width:100%; display:block}

/* HERO */
.hero{
  position:relative;
  min-height:100vh;
  display:grid;
  place-items:center;
  padding: 56px 18px 36px;
}

.hero__bg{
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.95;
}

.hero__content{
  position:relative;
  width:min(1020px, 100%);
  z-index:1;
  text-align:center;
}

.badge{
  display:inline-flex;
  gap:10px;
  align-items:center;
  padding:10px 14px;
  border:1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
  border-radius:999px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  backdrop-filter: blur(10px);
  font-size:14px;
}
.badge .km{
  font-weight:700;
  letter-spacing:.12em;
  color: white;
}

.title{
  margin:18px 0 8px;
  font-size: clamp(34px, 5vw, 64px);
  line-height:1.05;
  letter-spacing:.02em;
  text-shadow: 0 10px 40px rgba(0,0,0,.45);
}
.subtitle{
  margin:0 auto 22px;
  width:min(60ch, 100%);
  color: var(--muted);
  font-size: clamp(16px, 2.2vw, 20px);
}

.cta{
  display:flex;
  gap:12px;
  justify-content:center;
  flex-wrap:wrap;
  margin: 12px 0 26px;
}

.btn{
  border:1px solid var(--stroke);
  background: rgba(255,255,255,.08);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 14px;
  cursor:pointer;
  font-weight:600;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  backdrop-filter: blur(10px);
}
.btn:hover{ transform: translateY(-2px); border-color: rgba(255,255,255,.28); }
.btn--primary{
  background: linear-gradient(135deg, rgba(255,77,125,.95), rgba(255,46,106,.78));
  border-color: rgba(255,255,255,.22);
  box-shadow: 0 16px 40px rgba(255,77,125,.18);
}
.btn--ghost{
  background: rgba(255,255,255,.06);
}

/* COLLAGE */
.collage{
  margin: 18px auto 6px;
  width:min(960px, 100%);
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 10px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.18);
  padding: 12px;
  border-radius: 22px;
  box-shadow: 0 20px 60px rgba(0,0,0,.45);
  backdrop-filter: blur(10px);
}
.collage img{
  border-radius: 16px;
  aspect-ratio: 4/3;
  object-fit: cover;
  border: 1px solid rgba(255,255,255,.10);
  filter: saturate(1.08) contrast(1.02);
  transition: transform .18s ease, filter .18s ease;
}
.collage img:hover{
  transform: translateY(-3px) scale(1.01);
  filter: saturate(1.15) contrast(1.05);
}

/* วางแบบ “โมเสก” */
.collage img:nth-child(1){ grid-column: 1 / span 4; }
.collage img:nth-child(2){ grid-column: 5 / span 4; }
.collage img:nth-child(3){ grid-column: 9 / span 4; }
.collage img:nth-child(4){ grid-column: 1 / span 6; }
.collage img:nth-child(5){ grid-column: 7 / span 3; }
.collage img:nth-child(6){ grid-column: 10 / span 3; }

@media (max-width: 760px){
  .collage{ grid-template-columns: repeat(6, 1fr); }
  .collage img:nth-child(1){ grid-column: 1 / span 3; }
  .collage img:nth-child(2){ grid-column: 4 / span 3; }
  .collage img:nth-child(3){ grid-column: 1 / span 6; }
  .collage img:nth-child(4){ grid-column: 1 / span 3; }
  .collage img:nth-child(5){ grid-column: 4 / span 3; }
  .collage img:nth-child(6){ grid-column: 1 / span 6; }
}

.hint{
  margin: 14px 0 0;
  color: rgba(255,255,255,.65);
  font-size: 14px;
}

/* SECTIONS */
.section{
  width:min(1020px, 100%);
  margin: 0 auto;
  padding: 54px 18px;
}
.section__head{
  text-align:center;
  margin-bottom: 20px;
}
.section__head h2{
  margin:0;
  font-size: clamp(22px, 3vw, 34px);
}
.section__head p{
  margin: 8px 0 0;
  color: var(--muted);
}

/* GRID */
.grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 900px){
  .grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px){
  .grid{ grid-template-columns: 1fr; }
}
.card{
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.06);
  border-radius: 18px;
  overflow:hidden;
  box-shadow: 0 18px 50px rgba(0,0,0,.35);
}
.card img{
  width:100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.card figcaption{
  padding: 10px 12px 12px;
  color: rgba(255,255,255,.75);
  font-size: 14px;
}

/* VIDEO */
.section--video .videoWrap{
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.25);
  padding: 12px;
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(0,0,0,.45);
}
video{
  width:100%;
  border-radius: 14px;
  display:block;
}

/* NOTES */
.section--notes{
  padding-top: 26px;
}
.notes{
  list-style:none;
  padding:0;
  margin: 18px auto 0;
  width:min(70ch, 100%);
  display:grid;
  gap: 10px;
}
.notes li{
  padding: 14px 14px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,.10);
  background: linear-gradient(180deg, rgba(255,255,255,.10), rgba(255,255,255,.06));
  box-shadow: 0 14px 45px rgba(0,0,0,.28);
}
.signature{
  margin: 18px auto 0;
  width:min(70ch, 100%);
  display:flex;
  gap:10px;
  justify-content:center;
  align-items:center;
  color: rgba(255,255,255,.78);
}
.signature .heart{
  font-size: 18px;
  color: var(--hot);
}

/* FOOTER */
.footer{
  padding: 28px 18px 36px;
  text-align:center;
  color: rgba(255,255,255,.65);
}
.toTop{
  display:inline-block;
  margin-bottom: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
}

/* MODAL */
.modal{
  position:fixed;
  inset:0;
  display:none;
  z-index:50;
}
.modal[aria-hidden="false"]{ display:block; }
.modal__backdrop{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,.58);
  backdrop-filter: blur(6px);
}
.modal__panel{
  position:relative;
  width:min(720px, calc(100% - 28px));
  margin: 12vh auto 0;
  background: rgba(15, 8, 24, .78);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 20px;
  padding: 18px 18px 16px;
  box-shadow: 0 30px 90px rgba(0,0,0,.55);
}
.modal__panel h3{ margin: 6px 0 10px; }
.modal__panel p{
  margin: 0 0 12px;
  color: rgba(255,255,255,.82);
  line-height:1.6;
}
.modal__panel .ps{ color: rgba(255,255,255,.72); }
.modal__close{
  position:absolute;
  top: 10px;
  right: 12px;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color: var(--text);
  cursor:pointer;
  font-size: 22px;
}
.modal__actions{
  display:flex;
  justify-content:flex-end;
  margin-top: 8px;
}

/* ROSE (CSS ART) */
.rose{
  position:absolute;
  left: 50%;
  top: 14%;
  transform: translateX(-50%);
  width: 260px;
  height: 460px;
  filter: drop-shadow(0 24px 70px rgba(0,0,0,.55));
  opacity:.9;
}
@media (max-width: 560px){
  .rose{ transform: translateX(-50%) scale(.85); top: 10%; }
}
.rose__petal{
  position:absolute;
  left: 50%;
  top: 40px;
  width: 160px;
  height: 180px;
  transform: translateX(-50%);
  border-radius: 60% 40% 60% 40%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.35), transparent 55%),
              linear-gradient(145deg, var(--rose2), var(--rose));
  border: 1px solid rgba(255,255,255,.12);
}
.p1{ transform: translateX(-50%) rotate(-18deg) translate(-10px, 10px); }
.p2{ transform: translateX(-50%) rotate(18deg) translate(10px, 10px); }
.p3{ transform: translateX(-50%) rotate(-42deg) translate(-28px, 28px) scale(.92); opacity:.95; }
.p4{ transform: translateX(-50%) rotate(42deg) translate(28px, 28px) scale(.92); opacity:.95; }
.p5{ transform: translateX(-50%) rotate(0deg) translate(0px, 0px) scale(.85); opacity:.9; }
.p6{ transform: translateX(-50%) rotate(90deg) translate(0px, 0px) scale(.68); opacity:.75; }

.rose__core{
  position:absolute;
  left:50%;
  top: 92px;
  transform: translateX(-50%);
  width: 86px;
  height: 86px;
  border-radius: 28px 58px 34px 58px;
  background: radial-gradient(circle at 30% 25%, rgba(255,255,255,.32), transparent 60%),
              linear-gradient(145deg, #ff96b6, #ff2e6a);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: inset 0 -10px 30px rgba(0,0,0,.18);
}

.rose__stem{
  position:absolute;
  left:50%;
  top: 210px;
  transform: translateX(-50%);
  width: 18px;
  height: 220px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(45,212,163,.9), rgba(16,185,129,.65));
  box-shadow: 0 14px 40px rgba(0,0,0,.35);
}

.rose__leaf{
  position:absolute;
  top: 292px;
  width: 120px;
  height: 60px;
  background: radial-gradient(circle at 30% 40%, rgba(255,255,255,.22), transparent 60%),
              linear-gradient(145deg, rgba(45,212,163,.85), rgba(16,185,129,.65));
  border-radius: 60px 10px 60px 10px;
  border: 1px solid rgba(255,255,255,.12);
  filter: drop-shadow(0 12px 30px rgba(0,0,0,.35));
}
.l1{ left: 50%; transform: translateX(-120px) rotate(-16deg); }
.l2{ left: 50%; transform: translateX(0px) rotate(16deg); }

/* PETALS ANIMATION */
.petals{
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:2;
  overflow:hidden;
}
.petal{
  position:absolute;
  top:-10vh;
  width: 18px;
  height: 18px;
  border-radius: 60% 40% 60% 40%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.35), transparent 55%),
              linear-gradient(145deg, rgba(255,122,162,.95), rgba(255,46,106,.75));
  opacity:.65;
  filter: blur(.2px);
  animation: fall linear forwards;
}

@keyframes fall{
  to{
    transform: translate(var(--dx), 110vh) rotate(360deg);
    opacity: 0;
  }
}