:root{
  --bg:#07121a;
  --card:#142225;
  --snow: rgba(255,255,255,0.95);
  --accent: var(--snow); /* accent uses the same white as snow */
  --silver:#c0c0c0;
  --text:#f3f6f8;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  /* dark blue background */
  background: linear-gradient(180deg,#041021 0%, #072035 100%);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
}
/* dynamic snow generated via JS for more natural, random flakes */
/* Snowflake elements are positioned fixed and animated individually. */
.snowflake{
  position:fixed;
  top:-10vh;
  left:0;
  pointer-events:none;
  color:rgba(255,255,255,0.95);
  will-change:transform,opacity;
  z-index:0;
  text-shadow:0 1px 2px rgba(0,0,0,0.3);
}

@keyframes fall{
  0%{ transform: translateY(0) translateX(0); opacity:1 }
  100%{ transform: translateY(120vh) translateX(var(--drift,0px)); opacity:0.9 }
}
header{padding:28px 18px 8px;text-align:center}
.header-wrap{padding:0;text-align:center}
.subtitle{margin:6px 0 0;color:rgba(248,241,230,0.95);font-style:italic}
h1{font-family: Georgia, 'Times New Roman', serif;letter-spacing:1px;color:var(--silver);margin:6px 0}
.ornament{font-size:28px;margin-top:6px;color:var(--silver)}
.grid{display:grid;gap:16px;padding:24px;max-width:1100px;margin:0 auto;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));position:relative;z-index:1}
.door{border-radius:10px;padding:14px;position:relative;overflow:hidden;min-height:150px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .18s,box-shadow .18s,border-color .18s;
  /* semi-transparent deep red door */
  background: linear-gradient(180deg, rgba(183,28,28,0.55) 0%, rgba(139,0,0,0.55) 100%);
  border: 3px solid var(--silver);
  box-shadow: 0 10px 26px rgba(0,0,0,0.55);
}
.door:hover{transform:translateY(-4px);box-shadow:0 18px 42px rgba(0,0,0,0.72), 0 0 18px rgba(192,192,192,0.06);border-color:var(--silver)}
.daynum{position:absolute;top:12px;left:12px;background:var(--silver);color:var(--card);padding:0;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-weight:800;box-shadow:0 4px 12px rgba(0,0,0,0.45);font-family:Georgia,serif}
.daynum::before{content:"";position:absolute;top:-10px;left:50%;width:2px;height:12px;background:rgba(0,0,0,0.2);transform:translateX(-50%)}
.daynum::after{content:"";position:absolute;top:-6px;left:50%;width:6px;height:6px;background:rgba(0,0,0,0.15);border-radius:50%;transform:translateX(-50%)}
.locked-overlay{display:flex;flex-direction:column;align-items:center;gap:8px;color:rgba(248,241,230,0.95);position:relative}
.padlock{font-size:20px;color:var(--snow);background:transparent;padding:0;border:0;border-radius:0;box-shadow:none}
.thumb{max-width:100%;max-height:160px;border-radius:8px;display:block;border:4px solid rgba(255,255,255,0.04)}
.hidden{display:none}
#modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:20px}
.modal{background:rgba(2,6,23,0.85);position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;z-index:9999}
.modal-content{position:relative;max-width:920px;width:100%;z-index:10000}
#modal-img{width:100%;height:auto;border-radius:6px;display:block}
/* message: plain text (no box) */
.message{color:var(--text);font-size:20px;text-align:center;padding:0;background:transparent;border-radius:0}
.message.hidden{display:none}
/* message animation */
.message{opacity:0;transform:translateY(8px) scale(0.98);transition:opacity .28s ease, transform .28s ease}
.message.show{opacity:1;transform:translateY(0) scale(1)}
/* ensure hidden modal stays hidden (use id selector to override #modal rule) */
#modal.hidden{display:none;pointer-events:none}
@media (min-width:900px){.grid{grid-template-columns:repeat(6,1fr)}}

/* ornament in header */
.ornament{font-size:28px;margin-top:6px}