/* CHAMSOSIK 2026 Christmas Heart Thief Letter · isolated seasonal layer */
:root{--xmas-berry:#a31f3d;--xmas-pine:#0f4c43;--xmas-gold:#f3d59a;--xmas-cream:#fff8ed}
body.cs-xmas{background-image:radial-gradient(circle at 15% 4%,rgba(255,214,159,.11),transparent 32%),radial-gradient(circle at 92% 16%,rgba(85,177,135,.11),transparent 34%)}
.cs-xmas header{border-bottom:2px solid rgba(243,213,154,.65);box-shadow:0 4px 22px rgba(86,12,27,.17)}
.cs-xmas header .brand:after{content:' ✦';color:var(--xmas-gold)}
.cs-xmas .btn,.cs-xmas .cs-board-portal__links a{transition:filter .2s,transform .2s}
.cs-xmas .btn:hover,.cs-xmas .cs-board-portal__links a:hover{filter:brightness(1.15);transform:translateY(-2px)}
.cs-xmas .portal-card,.cs-xmas .panel,.cs-xmas .metric{border-color:rgba(217,168,116,.37)}
.cs-xmas-ribbon{position:relative;z-index:15;text-align:center;padding:9px 42px;background:linear-gradient(105deg,#5b132d,#9f2940 46%,#0c5044);color:#fff5e4;font-size:clamp(12px,1.8vw,15px);letter-spacing:.045em;box-shadow:0 4px 18px rgba(0,0,0,.16)}
.cs-xmas-ribbon a{color:inherit;text-decoration:none;font-weight:800}.cs-xmas-ribbon a:hover{text-decoration:underline}
.cs-xmas-ribbon b{color:#f8dc9c}.cs-xmas-ribbon .cs-xmas-toggle{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:1px solid rgba(255,255,255,.45);border-radius:12px;color:white;background:rgba(0,0,0,.24);font:inherit;font-size:11px;padding:5px 8px;cursor:pointer}
.cs-xmas-hero{position:relative;isolation:isolate;overflow:hidden;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(220px,.6fr);gap:28px;align-items:center;margin:22px 0 25px;padding:clamp(26px,5vw,56px);color:#fff8ed;border:1px solid rgba(255,218,157,.55);border-radius:24px;background:radial-gradient(circle at 80% 10%,rgba(255,235,183,.19),transparent 35%),linear-gradient(120deg,#371324 2%,#731f38 46%,#104a43 100%);box-shadow:0 22px 60px rgba(20,7,22,.23)}
.cs-xmas-hero:before{content:'✦  ✧  ✦  ✧  ✦';position:absolute;right:6%;top:9%;color:rgba(255,230,172,.35);font-size:25px;letter-spacing:20px;pointer-events:none}
.cs-xmas-eyebrow{display:inline-block;color:#ffe2ab!important;font-size:12px;font-weight:800;letter-spacing:.12em;margin-bottom:12px}
.cs-xmas-hero h1{font-size:clamp(29px,4vw,54px);line-height:1.18;margin:0 0 15px;color:#fff9ef!important;text-wrap:balance}
.cs-xmas-hero p{max-width:650px;margin:0 0 22px;color:#f8e8df!important;line-height:1.85;font-size:clamp(14px,1.8vw,17px)}
.cs-xmas-actions{display:flex;flex-wrap:wrap;gap:10px}
.cs-xmas-actions a,.cs-xmas-actions button{border:1px solid #ffdaa8;border-radius:999px;padding:12px 19px;background:#ffe1b2;color:#542339;text-decoration:none;font-weight:800;font-size:14px;cursor:pointer}
.cs-xmas-actions .secondary{color:#fff9eb;background:transparent}
.cs-xmas-letter-art{position:relative;min-height:235px;display:grid;place-items:center}
.cs-xmas-envelope{width:min(100%,290px);height:185px;position:relative;transform:rotate(-8deg);border:2px solid #f8dcad;border-radius:9px;background:linear-gradient(135deg,#fff5e8,#edcbac);box-shadow:13px 20px 0 rgba(12,20,25,.15),0 30px 50px rgba(0,0,0,.22)}
.cs-xmas-envelope:before{content:'';position:absolute;inset:0;background:linear-gradient(33deg,transparent 49.5%,#c89b8d 50%,transparent 50.6%),linear-gradient(-33deg,transparent 49.5%,#c89b8d 50%,transparent 50.6%);opacity:.6}
.cs-xmas-envelope:after{content:'♥';position:absolute;left:50%;top:55%;transform:translate(-50%,-50%);width:63px;height:63px;border-radius:50%;display:grid;place-items:center;color:#ffe3c5;font-size:34px;background:#a42c47;box-shadow:0 5px 13px rgba(0,0,0,.19)}
.cs-xmas-postmark{position:absolute;right:-12px;bottom:-20px;color:#fce1a8;font-weight:800;font-size:14px;transform:rotate(8deg)}
.cs-xmas-story{display:none;margin:0 0 28px;padding:24px;border-radius:20px;border:1px solid rgba(229,175,119,.5);background:linear-gradient(120deg,rgba(90,21,43,.92),rgba(19,73,65,.96));color:#fff4e8}
.cs-xmas-story.is-open{display:block}.cs-xmas-story h2{color:#ffe4b7;margin:0 0 12px}.cs-xmas-story p{color:#fff4e8;line-height:1.9}.cs-xmas-story .cs-xmas-note{font-size:13px;opacity:.85}
.cs-xmas-snow{position:fixed;inset:0;z-index:200;pointer-events:none;overflow:hidden;contain:strict}
.cs-xmas-flake{position:absolute;top:-30px;color:#fff;opacity:.72;text-shadow:0 0 4px #53828c;user-select:none;animation:cs-xmas-fall var(--fall,13s) linear infinite;animation-delay:var(--delay,0s);left:var(--left,50%);font-size:var(--size,14px)}
@keyframes cs-xmas-fall{from{transform:translate3d(0,-40px,0) rotate(0)}to{transform:translate3d(var(--drift,25px),calc(100vh + 80px),0) rotate(160deg)}}
.cs-xmas.no-snow .cs-xmas-snow{display:none}
@media(max-width:700px){.cs-xmas-hero{grid-template-columns:1fr;padding:26px 20px}.cs-xmas-letter-art{min-height:170px}.cs-xmas-envelope{width:215px;height:137px}.cs-xmas-ribbon{padding:10px 64px 10px 12px;font-size:11px}.cs-xmas-ribbon .cs-xmas-toggle{font-size:10px;padding:5px}.cs-xmas-hero h1{font-size:34px}}
@media(prefers-reduced-motion:reduce){.cs-xmas-flake{animation:none!important;display:none}.cs-xmas .btn,.cs-xmas .cs-board-portal__links a{transition:none}}

/* V4.17.0 · accessible hero-adjacent Christmas street film */
.cs-xmas-film{margin:0 0 26px;padding:clamp(16px,2.8vw,28px);border:1px solid rgba(243,213,154,.45);border-radius:22px;background:linear-gradient(135deg,#261923,#193b37);box-shadow:0 15px 45px rgba(0,0,0,.19);color:#fff9ed}
.cs-xmas-film-heading{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin:0 0 15px}
.cs-xmas-film-heading h2{margin:0 0 6px;color:#fff9ed!important;font-size:clamp(20px,2.7vw,30px)}
.cs-xmas-film-heading p{margin:0;color:#f2dad0!important;line-height:1.65}
.cs-xmas-film-duration{display:inline-block;white-space:nowrap;border:1px solid #dfbf8b;border-radius:999px;color:#fbe0b0;padding:7px 12px;font-size:12px}
.cs-xmas-film-frame{overflow:hidden;position:relative;border-radius:15px;background:#0b1018;aspect-ratio:16/9}
.cs-xmas-film-frame video{display:block;width:100%;height:100%;object-fit:cover}
.cs-xmas-film-caption{font-size:12px;color:#ebd6bd!important;margin:12px 0 0;line-height:1.7}
@media(max-width:700px){.cs-xmas-film{padding:14px;border-radius:15px}.cs-xmas-film-frame{border-radius:10px}}