/* Tilelet page - the game's dark "Deep Space" ramp (tilelet_theme.dart) with its gallery identity:
   gold-framed exhibits on a night-gallery wall, terracotta + cream inks */
.theme-tilelet {
  --tl-base: #080b22; --tl-raised: #121735; --tl-sunken: #040614; --tl-line: #272e5c;
  --tl-ink: #eef1ff; --tl-ink-soft: #b4bbe0; --tl-accent: #e8906f; --tl-positive: #6ee7a8;
  --tl-a: #da7756; --tl-b: #f2e6cf; --tl-cell: #1b2150;
  --text: var(--tl-ink); --text-dim: var(--tl-ink-soft); --line: var(--tl-line); --accent: var(--tl-accent);
  background: radial-gradient(900px 600px at 80% -10%, rgba(218, 119, 86, .16), transparent 60%),
              radial-gradient(800px 600px at -10% 100%, #1a1240 0%, transparent 60%),
              linear-gradient(180deg, #0b1030 0%, var(--tl-base) 55%, #05060f 100%);
}
.theme-tilelet .eyebrow { color: var(--tl-accent); }
.theme-tilelet main a { color: var(--tl-accent); }
.theme-tilelet .gradient-text { background: linear-gradient(100deg, #fff 0%, #f2b89f 45%, var(--tl-a) 100%); -webkit-background-clip: text; background-clip: text; }
.theme-tilelet .btn--primary { background: var(--tl-a); color: #1d0d06; }
.theme-tilelet .btn--primary:hover { background: #e8906f; color: #1d0d06; }
.theme-tilelet .card { background: linear-gradient(165deg, rgba(27, 33, 80, .75), rgba(18, 23, 53, .85)); border-color: var(--tl-line); }
.theme-tilelet .card__icon { background: rgba(218, 119, 86, .16); color: var(--tl-accent); }
.theme-tilelet .promises li { background: rgba(18, 23, 53, .8); border-color: var(--tl-line); }
.theme-tilelet .promises svg { stroke: var(--tl-positive); }
.theme-tilelet .cta-band { background: radial-gradient(600px 300px at 50% 0%, rgba(218, 119, 86, .2), transparent 70%), rgba(18, 23, 53, .6); border-color: var(--tl-line); }

/* ---------- Hero: a lit exhibit on a night-gallery wall ---------- */
.tl-hero { position: relative; overflow: hidden; isolation: isolate; padding: clamp(3.5rem, 9vw, 6.5rem) 0 clamp(3rem, 7vw, 5rem); }
.tl-hero__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.tl-hero h1 { font-size: clamp(2.6rem, 7vw, 4.6rem); margin-bottom: .3em; }
.tl-hero__tag { font-family: var(--font-display); font-size: clamp(1.3rem, 3vw, 1.7rem); font-weight: 600; color: #fff; margin-bottom: .8rem; }
.tl-research { display: flex; gap: .7rem; align-items: flex-start; margin: 1.4rem 0 1.8rem; padding: .9rem 1.1rem; border-radius: 14px; background: rgba(110, 231, 168, .07); border: 1px solid rgba(110, 231, 168, .28); color: #d6f7e7; font-size: .98rem; }
.tl-research svg { width: 22px; height: 22px; flex: none; fill: none; stroke: var(--tl-positive); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; margin-top: 2px; }
@media (max-width: 860px) { .tl-hero__grid { grid-template-columns: 1fr; } }

.tl-exhibit { position: relative; display: flex; flex-direction: column; align-items: center; gap: 1rem; margin: 0; min-width: 0; }
.tl-exhibit::before { content: ""; position: absolute; z-index: -1; left: 50%; top: -12%; width: 130%; height: 120%; transform: translateX(-50%);
  background: radial-gradient(50% 45% at 50% 35%, rgba(255, 230, 190, .22), transparent 70%); pointer-events: none; }
.tl-frame { padding: 18px; border-radius: 6px; background: linear-gradient(145deg, #e0bd82, #9c7442 55%, #d1a86a); box-shadow: 0 30px 70px rgba(0, 0, 0, .55), 0 0 0 1px rgba(0, 0, 0, .3); }
.tl-frame__mat { padding: 18px; background: #f6efe1; box-shadow: inset 0 2px 8px rgba(0, 0, 0, .18); }
.tl-pixels { display: grid; grid-template-columns: repeat(10, 1fr); gap: 2px; width: min(300px, 64vw); background: #ddd3bf; padding: 2px; transition: gap .8s var(--ease), background-color .8s; }
.tl-pixels i { aspect-ratio: 1; background: #fbf7ee; transition: background-color .25s, transform .25s; }
.tl-pixels i.on-a { background: #da7756; } .tl-pixels i.on-b { background: #3f7d5c; } .tl-pixels i.on-c { background: #2b2823; }
.tl-pixels.is-developed { gap: 0; background: #fbf7ee; }
.tl-plaque { font-family: var(--font-display); font-size: .82rem; letter-spacing: .16em; text-transform: uppercase; color: #e9d8b4; padding: .35rem .9rem; border: 1px solid rgba(224, 189, 130, .45); border-radius: 4px; background: rgba(18, 23, 53, .8); }

/* ---------- Playable demo ---------- */
.tl-demo { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
@media (max-width: 900px) { .tl-demo { grid-template-columns: 1fr; } }
.tl-play { position: relative; padding: clamp(1rem, 3vw, 1.6rem); border-radius: 22px; background: linear-gradient(180deg, var(--tl-raised), #0d1130); border: 1px solid var(--tl-line); box-shadow: 0 30px 70px rgba(0, 0, 0, .5); width: 100%; max-width: 520px; margin-inline: auto; }
.tl-puzzle { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto 1fr; gap: 6px; user-select: none; -webkit-user-select: none; touch-action: none; }
.tl-corner { display: grid; place-items: center; font-family: var(--font-display); font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--tl-ink-soft); }
.tl-cols { display: grid; grid-template-columns: repeat(6, 1fr); gap: 3px; align-items: end; }
.tl-rows { display: grid; grid-template-rows: repeat(6, 1fr); gap: 3px; }
.tl-clue { display: flex; gap: 3px; transition: opacity .3s; }
.tl-cols .tl-clue { flex-direction: column; align-items: center; justify-content: flex-end; }
.tl-rows .tl-clue { align-items: center; justify-content: flex-end; padding-right: 4px; }
.tl-clue b { min-width: 1.45rem; height: 1.45rem; padding: 0 .3rem; border-radius: 999px; display: grid; place-items: center; font-family: var(--font-display); font-size: .86rem; }
.tl-clue b.a { background: var(--tl-a); color: #1d0d06; } .tl-clue b.b { background: var(--tl-b); color: #2b2823; }
.tl-clue.is-done { opacity: .3; }
.tl-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 3px; padding: 3px; background: var(--tl-line); border-radius: 8px; }
.tl-cell { aspect-ratio: 1; border: 0; padding: 0; border-radius: 4px; background: var(--tl-cell); cursor: pointer; position: relative; transition: background-color .15s, box-shadow .2s; }
.tl-cell.a { background: var(--tl-a); box-shadow: 0 0 10px rgba(218, 119, 86, .45); } .tl-cell.b { background: var(--tl-b); box-shadow: 0 0 10px rgba(242, 230, 207, .35); }
.tl-cell.x::before, .tl-cell.x::after { content: ""; position: absolute; left: 22%; right: 22%; top: 50%; height: 2px; background: #6d76ad; border-radius: 2px; }
.tl-cell.x::before { transform: rotate(45deg); } .tl-cell.x::after { transform: rotate(-45deg); }
.tl-cell:focus-visible { outline: 2px solid #fff; outline-offset: 1px; }
.tl-tools { display: flex; gap: .6rem; margin-top: 1rem; align-items: center; flex-wrap: wrap; }
.tl-tool { display: inline-flex; align-items: center; gap: .5rem; min-height: 44px; padding: .45rem .9rem; border-radius: 999px; border: 2px solid transparent; background: var(--tl-sunken); color: var(--tl-ink); font: 600 .95rem var(--font-display); cursor: pointer; }
.tl-tool i { width: 20px; height: 20px; border-radius: 6px; }
.tl-tool i.a { background: var(--tl-a); } .tl-tool i.b { background: var(--tl-b); }
.tl-tool i.x { background: none; position: relative; }
.tl-tool i.x::before, .tl-tool i.x::after { content: ""; position: absolute; left: 2px; right: 2px; top: 9px; height: 2px; background: var(--tl-ink-soft); }
.tl-tool i.x::before { transform: rotate(45deg); } .tl-tool i.x::after { transform: rotate(-45deg); }
.tl-tool[aria-pressed="true"] { border-color: var(--tl-accent); background: #1b2150; }
.tl-reset { margin-left: auto; }
.tl-msg { min-height: 1.6em; margin: .9rem 0 0; font-family: var(--font-display); font-weight: 600; color: var(--tl-ink-soft); text-align: center; }
.tl-play.is-solved .tl-grid { gap: 0; padding: 0; background: var(--tl-cell); transition: gap .9s var(--ease), padding .9s; }
.tl-play.is-solved .tl-cell { border-radius: 0; }
.tl-play.is-solved .tl-cell.x::before, .tl-play.is-solved .tl-cell.x::after { opacity: 0; }
.tl-play.is-solved .tl-clue { opacity: .15; }
.tl-win { display: none; margin-top: 1rem; padding: 1rem; border-radius: 14px; text-align: center; background: rgba(110, 231, 168, .08); border: 1px solid rgba(110, 231, 168, .3); }
.tl-play.is-solved .tl-win { display: block; animation: tl-rise .6s var(--ease); }
@keyframes tl-rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.tl-rules { list-style: none; padding: 0; display: grid; gap: .9rem; }
.tl-rules li { display: grid; grid-template-columns: auto 1fr; gap: .9rem; align-items: start; padding: 1rem 1.1rem; border-radius: 14px; background: rgba(18, 23, 53, .8); border: 1px solid var(--tl-line); color: var(--tl-ink-soft); }
.tl-rules li strong { color: var(--tl-ink); }
.tl-mini { display: flex; gap: 3px; margin-top: 4px; }
.tl-mini i { width: 18px; height: 18px; border-radius: 3px; background: var(--tl-cell); border: 1px solid var(--tl-line); }
.tl-mini i.a { background: var(--tl-a); border-color: var(--tl-a); } .tl-mini i.b { background: var(--tl-b); border-color: var(--tl-b); }