/* ============================================================
   THIỆP MỜI HỌP LỚP 9C — sắc HOA PHƯỢNG (locked palette)
   Trường THCS Xuân Sơn · Niên khóa 2005 – 2009
   1 accent: ĐỎ phượng · 1 bạn đồng hành tự nhiên: XANH lá phượng
   Nền ngà ấm · vàng gold chỉ dùng như nhũ điểm xuyết
   Fonts: Baloo 2 (tiêu đề) · Dancing Script (viết tay) · Be Vietnam Pro
   ============================================================ */
:root{
  /* accent khóa cứng: đỏ hoa phượng */
  --red:#e23b2b;
  --red-2:#ff5a45;
  --red-deep:#c02a1b;
  --red-rich:#8f2015;      /* nền section đỏ đậm */
  /* bạn đồng hành: xanh lá phượng */
  --green:#2f8f63;
  --green-2:#43a97a;
  --green-deep:#1c6f49;
  --green-rich:#124d33;    /* nền section xanh đậm */
  /* nhũ vàng — chỉ điểm xuyết (nhị hoa/nắng), không phải accent thứ 2 */
  --gold:#efa62c;
  --gold-2:#ffc95d;
  /* nền & mực ấm */
  --cream:#fdf6ea;
  --cream-2:#f8ecd6;
  --paper:#fffaf1;
  --ink:#33291d;
  --ink-soft:#6a5c48;
  --line:rgba(51,41,29,.12);
  --shadow:0 20px 46px -22px rgba(51,41,29,.34);
  --radius:18px;
  --maxw:1120px;
  --display:"Baloo 2",system-ui,sans-serif;
  --sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --serif:"Playfair Display",Georgia,serif;
  --script:"Dancing Script",cursive;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);color:var(--ink);line-height:1.65;
  background:var(--cream);-webkit-font-smoothing:antialiased;overflow-x:hidden;position:relative;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

.fx-grain{
  position:fixed;inset:0;z-index:999;pointer-events:none;opacity:.14;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

/* ---------- Layout helpers ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px;position:relative;z-index:2}
.section{padding:96px 0;position:relative;z-index:2;overflow:hidden}
.kicker{
  font-family:var(--script);font-size:1.8rem;color:var(--red);
  font-weight:700;letter-spacing:.3px;margin-bottom:2px;
}
.kicker--center{text-align:center}
.kicker--light{color:var(--gold-2)}
.h2{
  font-family:var(--display);font-weight:800;line-height:1.14;
  font-size:clamp(2rem,4.6vw,3.1rem);color:var(--green-deep);margin-bottom:12px;
}
.h2 em{font-style:normal;color:var(--red)}
.h2--center{text-align:center}
.h2--light{color:#fff}
.h2--light em{color:var(--gold-2)}

.rule{display:flex;align-items:center;justify-content:center;gap:16px;margin:6px auto 46px;max-width:340px}
.rule::before,.rule::after{content:"";height:3px;flex:1;border-radius:3px;background:
  repeating-linear-gradient(90deg,var(--red) 0 10px,transparent 10px 18px)}
.rule span{color:var(--red);font-size:1.2rem}

.deco-sun{position:absolute;width:150px;height:150px;pointer-events:none;opacity:.5;z-index:1;
  background:radial-gradient(circle at center,var(--gold-2) 18%,transparent 19%),
  repeating-conic-gradient(from 0deg,var(--gold) 0deg 9deg,transparent 9deg 18deg);
  -webkit-mask:radial-gradient(circle,#000 46%,transparent 47%);mask:radial-gradient(circle,#000 46%,transparent 47%);}
.deco-sun--tl{top:34px;left:-40px;transform:rotate(8deg)}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;gap:18px;
  padding:16px clamp(16px,4vw,40px);transition:background .3s ease,box-shadow .3s ease,padding .3s ease;
}
.nav.scrolled{
  background:rgba(253,246,234,.94);backdrop-filter:blur(10px);
  box-shadow:0 8px 26px -16px rgba(51,41,29,.4);padding-top:11px;padding-bottom:11px;
}
.nav.scrolled .nav__brandtext{color:var(--green-deep);text-shadow:none}
.nav.scrolled .nav__brandtext em{color:var(--red)}
.nav.scrolled .nav__links a{color:var(--ink);text-shadow:none}
.nav__brand{display:flex;align-items:center;gap:11px;margin-right:auto}
.nav__badge{
  width:44px;height:44px;flex:none;border-radius:50%;
  display:grid;place-items:center;font-family:var(--display);font-weight:800;font-size:1.15rem;
  background:radial-gradient(circle at 32% 28%,var(--red-2),var(--red) 72%);color:#fff;
  border:2.5px solid #fff;box-shadow:0 4px 14px -4px rgba(51,41,29,.45);
}
.nav__brandtext{display:flex;flex-direction:column;justify-content:center;color:#fff;font-weight:700;line-height:1.05;font-size:1.02rem;text-shadow:0 1px 10px rgba(0,0,0,.35)}
.nav__brandtext em{font-style:normal;font-weight:500;font-size:.68rem;letter-spacing:2.5px;color:var(--gold-2);margin-top:2px}
.nav__links{display:flex;gap:26px}
.nav__links a{
  font-family:var(--display);font-weight:600;font-size:.98rem;
  color:#fff;position:relative;text-shadow:0 1px 8px rgba(0,0,0,.35);
}
.nav__links a::after{content:"";position:absolute;left:0;right:0;bottom:-5px;height:3px;border-radius:3px;background:var(--gold-2);transform:scaleX(0);transition:transform .25s ease}
.nav__links a:hover::after{transform:scaleX(1)}

/* ============================================================
   HERO — nắng phượng ấm
   ============================================================ */
.hero{
  position:relative;min-height:100svh;display:grid;place-items:center;text-align:center;
  padding:120px 20px 90px;overflow:hidden;isolation:isolate;
}
.hero__bg{
  position:absolute;inset:0;z-index:-4;
  background:url("media/01-ca-lop-tam-biet.jpg") center/cover no-repeat;
  filter:saturate(1.2) contrast(1.03) brightness(.78);transform:scale(1.06);
}
/* phủ sắc phượng: đỏ ấm trên → hồng đỏ giữa → xanh lá dưới (hoa & lá) */
.hero__overlay{
  position:absolute;inset:0;z-index:-2;
  background:
    linear-gradient(180deg,rgba(96,30,20,.84),rgba(194,42,27,.52) 50%,rgba(18,77,51,.86)),
    radial-gradient(80% 55% at 50% 34%,rgba(239,166,44,.3),transparent 62%);
}
.hero__sun{
  position:absolute;z-index:-3;top:32%;left:50%;width:min(150vw,1300px);aspect-ratio:1;transform:translate(-50%,-50%);
  background:repeating-conic-gradient(from 0deg at 50% 50%,rgba(255,201,93,.3) 0deg 6deg,transparent 6deg 14deg);
  -webkit-mask:radial-gradient(circle,#000 0%,rgba(0,0,0,.5) 30%,transparent 62%);
  mask:radial-gradient(circle,#000 0%,rgba(0,0,0,.5) 30%,transparent 62%);
  animation:spin 140s linear infinite;
}
@keyframes spin{to{transform:translate(-50%,-50%) rotate(360deg)}}
.hero__leak{
  position:absolute;inset:0;z-index:-1;pointer-events:none;mix-blend-mode:screen;opacity:.5;
  background:
    radial-gradient(38% 52% at 86% 14%,rgba(255,201,93,.55),transparent 60%),
    radial-gradient(42% 55% at 10% 90%,rgba(255,90,69,.4),transparent 60%);
}

.hero__inner{max-width:840px;color:#fff;position:relative;text-shadow:0 2px 16px rgba(0,0,0,.3)}

.stamp{
  display:grid;place-items:center;width:88px;height:88px;margin:0 auto 22px;transform:rotate(-6deg);
  border:3px solid rgba(255,255,255,.9);border-radius:50%;
  color:#fff;box-shadow:0 8px 20px -8px rgba(0,0,0,.45);background:rgba(143,32,21,.42);
}
.stamp__in{font-family:var(--display);font-weight:800;font-size:1rem;line-height:1.02;letter-spacing:.5px}
@media (max-width:640px){.stamp{width:74px;height:74px;margin-bottom:16px}.stamp__in{font-size:.85rem}}

.hero__eyebrow{
  font-family:var(--display);font-weight:600;letter-spacing:2px;font-size:.86rem;
  color:var(--gold-2);margin-bottom:20px;text-transform:uppercase;
}
.hero__mini{font-size:clamp(.98rem,2vw,1.18rem);color:rgba(255,255,255,.95);margin-bottom:2px;font-weight:500}
.hero__title{font-family:var(--display);line-height:.92;margin-bottom:6px}
.hero__word{
  display:block;font-weight:700;font-size:clamp(1.9rem,5.4vw,3.2rem);color:#fff;letter-spacing:.5px;
}
.hero__nine{
  display:block;font-weight:800;font-size:clamp(6rem,23vw,13rem);
  color:var(--gold-2);text-shadow:0 8px 30px rgba(0,0,0,.4),0 3px 0 var(--red-deep);letter-spacing:1px;line-height:.85;
}
.hero__sub{font-size:clamp(1.05rem,2.4vw,1.45rem);margin:8px 0 26px;color:#fff;font-weight:500}
.hero__sub b{color:var(--gold-2);font-size:1.3em;font-family:var(--display);font-weight:800}
.hero__meta{
  display:inline-flex;align-items:center;gap:16px;font-family:var(--display);font-weight:600;
  padding:10px 30px;border-radius:999px;background:rgba(255,255,255,.15);border:1.5px solid rgba(255,255,255,.5);
  backdrop-filter:blur(4px);margin-bottom:12px;
}
.hero__dow{letter-spacing:1px;text-transform:uppercase;font-size:1rem;color:#fff}
.hero__dot{color:var(--gold-2);font-size:.9rem}
.hero__date{font-size:clamp(1.3rem,3.6vw,1.9rem);letter-spacing:2px;color:#fff;font-weight:700}
.hero__place{font-family:var(--display);font-weight:600;letter-spacing:1px;font-size:.92rem;color:rgba(255,255,255,.95);margin-bottom:24px}

.hero__script{
  font-family:var(--script);font-size:clamp(2.3rem,6.6vw,3.8rem);color:var(--gold-2);
  font-weight:700;text-shadow:0 3px 18px rgba(0,0,0,.32);margin-bottom:30px;
}

/* countdown */
.countdown{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cd{
  min-width:88px;padding:14px 10px;border-radius:16px;
  background:rgba(255,255,255,.16);border:1.5px solid rgba(255,255,255,.5);
  backdrop-filter:blur(6px);box-shadow:0 10px 26px -16px rgba(0,0,0,.45);
}
.cd__num{display:block;font-family:var(--display);font-weight:800;font-size:clamp(1.9rem,5vw,2.7rem);color:#fff;line-height:1}
.cd__lab{display:block;font-family:var(--display);text-transform:uppercase;letter-spacing:1px;font-size:.68rem;font-weight:600;color:var(--gold-2);margin-top:6px}
@media (max-width:640px){.cd{min-width:70px;padding:12px 8px}}

.hero__scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:3}
.hero__scroll span{display:block;width:26px;height:42px;border:2px solid rgba(255,255,255,.75);border-radius:14px;position:relative}
.hero__scroll span::after{content:"";position:absolute;top:8px;left:50%;transform:translateX(-50%);width:4px;height:8px;border-radius:2px;background:var(--gold-2);animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{opacity:0;top:8px}40%{opacity:1}80%{opacity:0;top:22px}}

/* ============================================================
   LETTER
   ============================================================ */
.letter{background:
  radial-gradient(120% 90% at 100% 0,rgba(47,143,99,.12),transparent 45%),
  radial-gradient(100% 80% at 0 100%,rgba(239,166,44,.14),transparent 45%),
  var(--cream);}
.letter__grid{display:grid;grid-template-columns:0.92fr 1.08fr;gap:56px;align-items:center}
.polaroid{
  background:#fff;padding:14px 14px 56px;border-radius:6px;box-shadow:var(--shadow);
  transform:rotate(-3deg);position:relative;transition:transform .4s ease;
}
.polaroid:hover{transform:rotate(-1deg) scale(1.02)}
.polaroid img{border-radius:3px;width:100%;aspect-ratio:4/3;object-fit:cover;filter:saturate(1.12)}
.polaroid__cap{position:absolute;left:0;right:0;bottom:16px;text-align:center;font-family:var(--script);font-size:1.45rem;color:var(--green-deep)}
.tape{position:absolute;width:110px;height:30px;background:rgba(239,166,44,.5);border:1px dashed rgba(226,59,43,.4);z-index:3;box-shadow:0 2px 6px rgba(51,41,29,.12)}
.tape--tl{top:-12px;left:-14px;transform:rotate(-24deg)}
.tape--br{bottom:44px;right:-16px;transform:rotate(-24deg);width:90px}
.letter__body p{margin-bottom:16px;color:var(--ink-soft);font-size:1.07rem}
.letter__body b{color:var(--red-deep)}
.letter__sign{font-family:var(--script);font-size:1.9rem;color:var(--red);margin-top:8px}

/* ============================================================
   INFO
   ============================================================ */
.info{background:linear-gradient(180deg,var(--cream),var(--cream-2))}
.info__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.icard{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 24px;text-align:center;box-shadow:0 16px 34px -24px rgba(51,41,29,.4);
  transition:transform .3s ease,box-shadow .3s ease;position:relative;overflow:hidden;
}
.icard:nth-child(odd){transform:rotate(-1deg)}
.icard:nth-child(even){transform:rotate(1deg)}
.icard::after{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:linear-gradient(90deg,var(--red),var(--red-2))}
.icard:hover{transform:translateY(-6px) rotate(0);box-shadow:0 26px 46px -24px rgba(51,41,29,.5)}
.icard__ico{font-size:2.4rem;margin-bottom:12px}
.icard h3{font-family:var(--display);color:var(--green-deep);font-size:1.34rem;margin-bottom:10px;font-weight:700}
.icard p{font-size:.96rem;color:var(--ink-soft);margin-bottom:2px}
.icard b{color:var(--red-deep)}

/* ============================================================
   TIMELINE — tán lá phượng (xanh đậm)
   ============================================================ */
.timeline{background:linear-gradient(158deg,#1c5f43,#0f3524);color:#fff}
.timeline::before{content:"";position:absolute;inset:0;z-index:0;opacity:.12;background:url("media/03-khai-giang-2008.jpg") center/cover}
.timeline::after{content:"";position:absolute;inset:0;z-index:0;background:radial-gradient(80% 60% at 50% 0,rgba(239,166,44,.18),transparent 55%)}
.tl{list-style:none;max-width:760px;margin:44px auto 0;position:relative;z-index:2}
.tl::before{content:"";position:absolute;left:88px;top:6px;bottom:6px;width:3px;border-radius:3px;background:linear-gradient(var(--gold-2),rgba(255,201,93,.2))}
.tl__item{display:grid;grid-template-columns:76px 30px 1fr;align-items:flex-start;gap:14px;margin-bottom:24px;position:relative}
.tl__time{font-family:var(--display);font-weight:800;font-size:1.5rem;color:var(--gold-2);text-align:right;padding-top:10px}
.tl__dot{width:18px;height:18px;margin:15px auto 0;border-radius:50%;background:var(--gold-2);border:3px solid var(--green-rich);box-shadow:0 0 0 3px rgba(255,201,93,.4);position:relative;z-index:2}
.tl__card{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.32);border-radius:16px;padding:16px 22px;backdrop-filter:blur(4px)}
.tl__card h3{font-family:var(--display);font-size:1.24rem;color:#fff;margin-bottom:4px;font-weight:700}
.tl__card p{color:rgba(255,255,255,.9);font-size:.95rem}

/* ============================================================
   PROGRAM
   ============================================================ */
.program{background:
  radial-gradient(100% 80% at 0 100%,rgba(47,143,99,.12),transparent 45%),
  radial-gradient(90% 70% at 100% 0,rgba(226,59,43,.1),transparent 45%),
  var(--paper);}
.program__note{text-align:center;color:var(--ink-soft);margin-bottom:44px;font-style:italic}
.pgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 26px;max-width:920px;margin:0 auto}
.pitem{
  display:flex;align-items:flex-start;gap:18px;padding:18px 22px;
  background:#fff;border:1px solid var(--line);border-radius:16px;
  border-left:6px solid var(--red);transition:transform .25s ease,box-shadow .25s ease;
}
.pitem:nth-child(even){border-left-color:var(--green)}
.pitem:hover{transform:translateX(4px);box-shadow:0 16px 32px -22px rgba(51,41,29,.5)}
.pitem__no{font-family:var(--display);font-weight:800;font-size:1.6rem;color:var(--red);line-height:1;flex:none;min-width:40px}
.pitem:nth-child(even) .pitem__no{color:var(--green)}
.pitem h3{font-family:var(--display);font-size:1.08rem;color:var(--ink);font-weight:600;line-height:1.35}
.pitem p{font-size:.9rem;color:var(--ink-soft);margin-top:3px}

/* ============================================================
   GALLERY — hoa phượng nở (đỏ đậm)
   ============================================================ */
.gallery{background:
  radial-gradient(90% 60% at 100% 0,rgba(47,143,99,.14),transparent 50%),
  radial-gradient(85% 60% at 0 100%,rgba(226,59,43,.09),transparent 50%),
  linear-gradient(180deg,var(--cream),var(--cream-2));color:var(--ink)}
.gallery .kicker--light{color:var(--red)}
.gallery .h2--light{color:var(--green-deep)}
.gallery .h2--light em{color:var(--red)}
.gallery__sub{text-align:center;color:var(--ink-soft);max-width:560px;margin:0 auto 44px}
.ggrid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:200px;gap:14px;position:relative;z-index:2}
.gitem{
  position:relative;overflow:hidden;border-radius:8px;cursor:pointer;
  border:5px solid #fff;box-shadow:0 16px 32px -18px rgba(0,0,0,.5);
}
.gitem:nth-child(3n+1){transform:rotate(-1.2deg)}
.gitem:nth-child(3n+2){transform:rotate(1deg)}
.gitem--tall{grid-row:span 2}
.gitem img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;filter:saturate(1.14)}
.gitem::after{content:attr(data-cap);position:absolute;left:0;right:0;bottom:0;padding:26px 14px 12px;font-size:.82rem;color:#fff;line-height:1.3;background:linear-gradient(transparent,rgba(16,55,39,.95));opacity:0;transform:translateY(8px);transition:opacity .3s ease,transform .3s ease}
.gitem:hover{z-index:3}
.gitem:hover img{transform:scale(1.08);filter:saturate(1.22)}
.gitem:hover::after{opacity:1;transform:translateY(0)}

.videowrap{max-width:720px;margin:48px auto 0;text-align:center;position:relative;z-index:2}
.videowrap video{width:100%;border-radius:10px;border:5px solid #fff;box-shadow:0 22px 46px -20px rgba(0,0,0,.55);background:#000}
.videowrap__cap{font-family:var(--script);font-size:1.65rem;color:var(--green-deep);margin-top:14px}

/* ============================================================
   FOOTER — tán lá phượng (xanh đậm)
   ============================================================ */
.footer{background:linear-gradient(168deg,#16402f,#0b2117);color:#fff;text-align:center;padding:70px 20px 48px;position:relative;z-index:2;overflow:hidden;border-top:1px solid rgba(255,255,255,.08)}
.footer__leak{position:absolute;inset:0;pointer-events:none;opacity:.38;mix-blend-mode:screen;background:radial-gradient(55% 60% at 50% 0,rgba(239,166,44,.42),transparent 62%)}
.footer__badge{position:relative;z-index:2;width:66px;height:66px;margin:0 auto 16px;border-radius:50%;display:grid;place-items:center;font-family:var(--display);font-weight:800;font-size:1.6rem;color:#fff;background:radial-gradient(circle at 32% 28%,var(--red-2),var(--red) 72%);border:3px solid #fff}
.footer__invite{position:relative;z-index:2;font-family:var(--display);text-transform:uppercase;letter-spacing:3px;font-weight:600;font-size:.86rem;color:var(--gold-2);margin-bottom:8px}
.footer__script{position:relative;z-index:2;font-family:var(--script);font-size:2.2rem;color:#fff;margin-bottom:16px}
.footer__meta{position:relative;z-index:2;color:rgba(255,255,255,.92);font-size:.92rem}
.footer__sign{position:relative;z-index:2;font-family:var(--script);font-size:1.55rem;color:var(--gold-2);margin-top:12px}
.footer__ics{position:relative;z-index:2;display:inline-block;margin-top:18px;font-family:var(--display);letter-spacing:1px;text-transform:uppercase;font-weight:600;font-size:.8rem;color:#fff;border:2px solid rgba(255,255,255,.7);padding:9px 22px;border-radius:999px;transition:background .2s ease,color .2s ease}
.footer__ics:hover{background:#fff;color:var(--green-deep)}
.footer__copy{position:relative;z-index:2;margin-top:22px;color:var(--gold-2);font-family:var(--script);font-size:1.4rem}

/* ============================================================
   LIGHTBOX
   ============================================================ */
.lb{position:fixed;inset:0;z-index:1000;display:grid;place-items:center;background:rgba(40,20,14,.94);backdrop-filter:blur(6px);padding:30px}
.lb[hidden]{display:none}
.lb__fig{max-width:min(92vw,1000px);text-align:center}
.lb__fig img{max-width:100%;max-height:80vh;border-radius:8px;border:6px solid #fff;box-shadow:0 30px 60px -20px rgba(0,0,0,.7)}
.lb__fig figcaption{color:var(--gold-2);font-family:var(--script);font-size:1.65rem;margin-top:14px}
.lb__close{position:absolute;top:20px;right:26px;font-size:1.6rem;color:#fff;background:none;border:none;cursor:pointer;line-height:1}
.lb__nav{position:absolute;top:50%;transform:translateY(-50%);font-size:2.6rem;color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);cursor:pointer;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;transition:background .2s ease}
.lb__nav:hover{background:rgba(255,255,255,.28)}
.lb__prev{left:24px}.lb__next{right:24px}

/* ============================================================
   REVEAL
   ============================================================ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .hero__sun{animation:none}
}

/* ============================================================
   PHƯỢNG RƠI — hoa & lá phượng bay
   ============================================================ */
.petal-field{position:fixed;inset:0;z-index:40;pointer-events:none;overflow:hidden}
.petal{position:absolute;top:-10vh;will-change:transform;animation:petal-fall linear infinite}
.petal i{display:block;width:100%;height:100%;background-size:contain;background-repeat:no-repeat;background-position:center;transform-origin:center;will-change:transform;animation:petal-sway ease-in-out infinite alternate}
@keyframes petal-fall{from{transform:translate3d(0,-10vh,0)}to{transform:translate3d(0,116vh,0)}}
@keyframes petal-sway{from{transform:translateX(-14px) rotate(-35deg)}to{transform:translateX(14px) rotate(45deg)}}
@media (prefers-reduced-motion:reduce){.petal-field{display:none}}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1000px){
  .info__grid{grid-template-columns:repeat(2,1fr)}
  .ggrid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:860px){
  .nav__links{display:none}
  .section{padding:74px 0}
  .letter__grid{grid-template-columns:1fr;gap:36px}
  .polaroid{max-width:420px;margin:0 auto}
  .pgrid{grid-template-columns:1fr}
}
@media (max-width:640px){
  .info__grid{grid-template-columns:1fr}
  .ggrid{grid-template-columns:repeat(2,1fr);grid-auto-rows:150px}
  .hero__meta{flex-wrap:wrap;gap:8px;padding:10px 18px}
  .tl__item{grid-template-columns:60px 24px 1fr}
  .tl::before{left:72px}
  .tl__time{font-size:1.25rem}
  .lb__nav{width:42px;height:42px;font-size:2rem}
  .lb__prev{left:10px}.lb__next{right:10px}
}