*{box-sizing:border-box;}
:root{--kyyeu-accent:#4A6B7C; --kyyeu-heading-font:'Cormorant Garamond',serif; --kyyeu-heading-scale:1;}
html{background:#1A2530;}
body{margin:0; color:#DCE4E8; font-family:'Literata',serif; line-height:1.8; overflow-x:hidden;
  background:var(--kyyeu-bg,
    linear-gradient(180deg,#141D26 0%,#1E2C38 45%,#243642 100%));
}
.wrap{max-width:720px; margin:0 auto; position:relative; z-index:3;}
@media (prefers-reduced-motion: reduce){ .raindrop,.lightning,.wet-drop{animation:none !important; opacity:.3;} }

/* MƯA RƠI */
.rain-layer{position:fixed; inset:0; z-index:1; pointer-events:none; overflow:hidden;}
.raindrop{
  position:absolute; top:-14vh; width:1.4px; border-radius:1px;
  background:linear-gradient(180deg, transparent, rgba(190,215,230,.55));
  animation:rainFall linear infinite;
}
@keyframes rainFall{
  0%{transform:translateY(0) translateX(0); opacity:0;}
  8%{opacity:.85;}
  100%{transform:translateY(118vh) translateX(var(--wind,14px)); opacity:.25;}
}

/* CHỚP SẤM */
.lightning{position:fixed; inset:0; z-index:2; pointer-events:none; background:#DCE8F0; opacity:0;}
.lightning.flash{animation:flashBolt 1.1s ease-out;}
@keyframes flashBolt{
  0%{opacity:0;} 4%{opacity:.34;} 8%{opacity:.04;} 13%{opacity:.28;}
  20%{opacity:.02;} 26%{opacity:.15;} 100%{opacity:0;}
}

/* Ô CỬA SỔ KÍNH MỜ */
.cover{padding:52px 22px 30px; text-align:center; position:relative; z-index:3;}
.eyebrow{font-size:10.5px; letter-spacing:.32em; color:#7A99A8; margin-bottom:24px;}
.window-pane{position:relative; width:300px; height:340px; margin:0 auto 12px; border-radius:6px; overflow:hidden;
  box-shadow:0 24px 50px rgba(0,0,0,.5);}
.pane-photo{position:absolute; inset:0;}
.pane-photo img{width:100%; height:100%; object-fit:cover; filter:saturate(.82) brightness(.86);}
.fog-canvas{position:absolute; inset:0; width:100%; height:100%; cursor:crosshair; touch-action:none;}
.pane-frame{position:absolute; inset:0; pointer-events:none; border:9px solid #3A4A56; border-radius:6px;
  box-shadow:inset 0 0 44px rgba(0,0,0,.5);}
.pane-frame::before{content:""; position:absolute; top:50%; left:-9px; right:-9px; height:7px; background:#3A4A56; transform:translateY(-50%);}
.drop-track{position:absolute; inset:0; pointer-events:none; overflow:hidden;}
.pane-drop{position:absolute; width:5px; border-radius:0 0 4px 4px;
  background:linear-gradient(180deg, rgba(220,235,245,.5), rgba(180,205,220,.25));
  animation:slideDown linear forwards;}
@keyframes slideDown{
  0%{transform:translateY(0) scaleY(.5); opacity:.75;}
  100%{transform:translateY(340px) scaleY(1.5); opacity:0;}
}
.wipe-hint{font-size:11.5px; color:#6E8A99; font-style:italic; margin:0 0 22px;}

.cover h1{font-family:var(--kyyeu-heading-font); font-style:italic; font-weight:600;
  font-size:calc(42px * var(--kyyeu-heading-scale)); margin:0 0 10px; color:#CFE0E8;}
.rain-lyric{font-family:var(--kyyeu-heading-font); font-style:italic; font-size:16px; color:var(--kyyeu-accent); margin:0 0 12px;}
.cover-meta{margin:0; font-size:13.5px; color:#7A99A8;}

.section{padding:54px 24px 8px; position:relative; z-index:3;}
.section-head{text-align:center; margin-bottom:30px;}
.section h2{font-family:var(--kyyeu-heading-font); font-style:italic; font-weight:600;
  font-size:calc(28px * var(--kyyeu-heading-scale)); color:#CFE0E8; margin:0 0 6px;}
.section .sub{font-size:12.5px; color:#7A99A8;}

/* ẢNH SAU KÍNH ƯỚT */
.wet-gallery{display:grid; grid-template-columns:repeat(3,1fr); gap:16px;}
.wet-frame{margin:0; position:relative; border-radius:8px; overflow:hidden;
  box-shadow:0 12px 26px rgba(0,0,0,.4); opacity:0; transform:translateY(18px);
  transition:opacity .9s ease var(--d), transform .9s cubic-bezier(.2,.85,.3,1) var(--d);}
.wet-frame.wet{opacity:1; transform:translateY(0);}
.wet-frame img{width:100%; height:140px; object-fit:cover; display:block;
  filter:saturate(.85) brightness(.9) blur(.6px); transition:filter .6s ease, transform .6s ease;}
.wet-frame:hover img{filter:saturate(1.02) brightness(1.02) blur(0); transform:scale(1.04);}
.wet-drop{position:absolute; background:rgba(220,238,248,.35); border-radius:50% 50% 50% 50% / 60% 60% 40% 40%;
  pointer-events:none; animation:dropWobble 4s ease-in-out infinite;}
.wet-drop.d1{width:9px; height:12px; top:16%; left:22%;}
.wet-drop.d2{width:6px; height:8px; top:52%; left:68%; animation-delay:1.3s;}
.wet-drop.d3{width:11px; height:14px; top:72%; left:38%; animation-delay:2.4s;}
@keyframes dropWobble{0%,100%{transform:translateY(0) scale(1); opacity:.4;} 50%{transform:translateY(6px) scale(1.1); opacity:.7;}}
.wet-frame figcaption{position:absolute; left:0; right:0; bottom:0; padding:8px 10px; font-size:11.5px;
  color:#fff; background:linear-gradient(transparent, rgba(10,18,24,.85));}
@media(max-width:600px){.wet-gallery{grid-template-columns:repeat(2,1fr);}}

.see-full{text-align:center; margin:30px 0 0;}
.see-full a{font-family:var(--kyyeu-heading-font); font-style:italic; font-size:15px; color:var(--kyyeu-accent);
  text-decoration:none; border-bottom:1px solid rgba(74,107,124,.55); padding-bottom:2px;}

/* KÝ ỨC NGÀY MƯA */
.rain-memories{max-width:520px; margin:0 auto;}
.rain-memory{display:flex; gap:16px; padding:16px 0; border-bottom:1px solid rgba(122,153,168,.16);}
.rain-memory:last-child{border-bottom:none;}
.rm-icon{font-size:20px; color:var(--kyyeu-accent); flex-shrink:0;}
.rm-body strong{display:block; font-family:var(--kyyeu-heading-font); font-size:16.5px; color:#CFE0E8; margin-bottom:3px;}
.rm-body span{font-size:13.5px; color:#96AEBA;}

/* ĐỒ NGÀY MƯA */
.rain-items{display:flex; flex-wrap:wrap; justify-content:center; gap:10px; max-width:520px; margin:0 auto;}
.rain-item{background:rgba(255,255,255,.05); border:1px solid rgba(122,153,168,.25); border-radius:20px;
  padding:8px 17px; font-size:13px; color:#CFE0E8;}

/* LỜI NHẮN TRÊN KÍNH MỜ */
.fog-notes{display:grid; grid-template-columns:1fr 1fr; gap:16px; max-width:560px; margin:0 auto;}
.fog-note{background:rgba(220,238,248,.06); backdrop-filter:blur(6px); border:1px solid rgba(200,225,240,.16);
  border-radius:10px; padding:18px 20px;}
.fog-note p{margin:0 0 10px; font-size:14px; color:#DCE4E8; font-style:italic;}
.fog-note cite{font-family:var(--kyyeu-heading-font); font-style:normal; font-size:13px; color:var(--kyyeu-accent);}
@media(max-width:560px){.fog-notes{grid-template-columns:1fr;}}

.share{margin:58px 24px 30px; padding:42px 26px; text-align:center; border-radius:14px;
  background:rgba(255,255,255,.04); border:1px solid rgba(122,153,168,.22); position:relative; z-index:3;}
.share h2{font-family:var(--kyyeu-heading-font); font-style:italic; font-size:26px; margin:0 0 8px; color:#CFE0E8;}
.share p{font-size:13px; margin:0 0 20px; color:#7A99A8;}
#qrcode{background:#fff; display:inline-block; padding:9px; border-radius:8px; margin-bottom:16px;}
.link-row{display:flex; justify-content:center; gap:8px; flex-wrap:wrap; font-size:12.5px;}
.link-row code{background:rgba(74,107,124,.16); padding:7px 13px; border-radius:20px; color:#CFE0E8;}
.link-row button{background:var(--kyyeu-accent); color:#0F1820; border:none; padding:7px 15px; border-radius:20px;
  font-size:12px; font-weight:700; cursor:pointer;}

.foot{text-align:center; font-size:11.5px; color:#5E7A88; padding:0 20px 44px; position:relative; z-index:3;}

/* ============ NÂNG CẤP PREMIUM ============ */
/* Bảng màu bổ sung: hổ phách ấm của đèn đường trong mưa — tạo tương phản cảm xúc với xanh lạnh */
:root{--kyyeu-amber:#E8A85C; --kyyeu-amber-soft:rgba(232,168,92,.16);}

/* Vệt sáng đèn đường loang trong mưa */
body::after{content:""; position:fixed; inset:0; z-index:1; pointer-events:none;
  background:radial-gradient(ellipse 40% 30% at 82% 12%, rgba(232,168,92,.14), transparent 62%),
             radial-gradient(ellipse 34% 26% at 14% 68%, rgba(232,168,92,.08), transparent 60%);}

/* 1. NHẬT KÝ THỜI TIẾT */
.weather-log{max-width:540px; margin:0 auto; background:rgba(255,255,255,.035);
  border:1px solid rgba(122,153,168,.2); border-radius:12px; overflow:hidden;}
.wl-head{display:grid; grid-template-columns:78px 1fr 92px; gap:12px; padding:11px 18px;
  background:rgba(0,0,0,.2); font-size:9.5px; letter-spacing:.16em; color:#7A99A8;}
.wl-row{display:grid; grid-template-columns:78px 1fr 92px; gap:12px; padding:14px 18px; align-items:center;
  border-bottom:1px solid rgba(122,153,168,.1); opacity:0; transform:translateX(-10px);
  transition:opacity .6s ease var(--d), transform .6s ease var(--d);}
.wl-row.logged{opacity:1; transform:translateX(0);}
.wl-row:last-child{border-bottom:none;}
.wl-date{font-family:'Courier New',monospace; font-size:12px; color:var(--kyyeu-amber);}
.wl-event{font-size:14px; color:#DCE4E8;}
.wl-icon{text-align:right; font-size:19px; animation:iconSway 3.4s ease-in-out infinite;}
@keyframes iconSway{0%,100%{transform:translateY(0) rotate(-4deg);} 50%{transform:translateY(-4px) rotate(4deg);}}

/* 2. Ô CỬA SỔ LỚP — KÍNH MỜ TAN KHI DI CHUỘT */
.class-windows{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; max-width:560px; margin:0 auto;}
.cw-pane{position:relative; aspect-ratio:3/4; border-radius:6px; overflow:hidden;
  border:5px solid #3A4A56; box-shadow:0 10px 22px rgba(0,0,0,.4); cursor:pointer;}
.cw-pane img{width:100%; height:100%; object-fit:cover; filter:brightness(.8) saturate(.85);
  transition:filter .6s ease, transform .8s ease;}
.cw-frost{position:absolute; inset:0; backdrop-filter:blur(7px);
  background:linear-gradient(160deg, rgba(206,224,234,.78), rgba(160,190,206,.62));
  transition:opacity .7s cubic-bezier(.3,.8,.3,1), backdrop-filter .7s ease;}
.cw-frost::after{content:"⌁"; position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  font-size:20px; color:rgba(30,50,62,.4);}
.cw-pane:hover .cw-frost{opacity:0;}
.cw-pane:hover img{filter:brightness(1.05) saturate(1.05); transform:scale(1.05);}
.cw-name{position:absolute; left:0; right:0; bottom:0; padding:7px 8px; font-size:11px; color:#fff;
  background:linear-gradient(transparent, rgba(8,14,20,.9)); opacity:0; transition:opacity .5s ease;}
.cw-pane:hover .cw-name{opacity:1;}
@media(max-width:560px){.class-windows{grid-template-columns:repeat(3,1fr);}}

/* 3. TIẾNG MƯA — BỘ ĐO SÓNG ÂM */
.rain-meter{max-width:420px; margin:0 auto; text-align:center;}
.rm-bars{display:flex; align-items:flex-end; justify-content:center; gap:3px; height:56px; margin-bottom:16px;}
.rm-bars span{width:4px; border-radius:2px;
  background:linear-gradient(180deg, var(--kyyeu-amber), var(--kyyeu-accent));
  animation:rainPulse 1.5s ease-in-out infinite;}
@keyframes rainPulse{0%,100%{transform:scaleY(.25); opacity:.5;} 50%{transform:scaleY(1); opacity:1;}}
.rm-stat{display:flex; justify-content:center; gap:34px; flex-wrap:wrap;}
.rm-cell strong{display:block; font-family:var(--kyyeu-heading-font); font-size:27px; color:var(--kyyeu-amber);}
.rm-cell span{font-size:10px; letter-spacing:.14em; color:#7A99A8;}