/* ==========================================================
   YU XIN — components: buttons, cards, pricing, specs,
   contact, reveal / parallax helpers
   ========================================================== */

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  min-height: 48px; padding: 0.8rem 1.5rem; border-radius: 999px;
  font: 600 var(--fs-sm)/1 var(--font); letter-spacing: 0.02em;
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--sand); color: var(--on-accent); }
.btn-primary:hover { background: var(--text); color: var(--on-accent); }
.btn-ghost { background: rgba(236,230,223,0.06); color: var(--text); border-color: rgba(236,230,223,0.28); }
.btn-ghost:hover { border-color: var(--sand); color: var(--text); }
.btn-sm { min-height: 40px; padding: 0.6rem 1.1rem; font-size: var(--fs-xs); }
.btn svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; }

/* ---------- Tag / chip ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: var(--space-2) 0; padding: 0; list-style: none; }
.chip {
  font-size: var(--fs-xs); letter-spacing: 0.05em; color: var(--text);
  padding: 0.3rem 0.75rem; border-radius: 999px; border: 1px solid var(--line); background: rgba(236,230,223,0.04);
}

/* ---------- Game cards ---------- */
.game-grid { display: grid; gap: var(--space-3); }
.game-card {
  position: relative; display: flex; flex-direction: column;
  border-radius: var(--radius); overflow: hidden;
  background: var(--bg-elev); border: 1px solid var(--line);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.game-card:hover { transform: translateY(-6px); border-color: rgba(216,195,165,0.45); }
.game-art { aspect-ratio: 16 / 10; position: relative; overflow: hidden; }
.game-art::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(38,35,33,0.95));
}
.art-ember { background: radial-gradient(70% 80% at 30% 30%, #c99a86, transparent 70%), radial-gradient(60% 70% at 80% 80%, #8a6f66, transparent 70%), #3a302c; }
.art-lumen { background: radial-gradient(70% 80% at 70% 30%, #8fa7b0, transparent 70%), radial-gradient(60% 70% at 20% 80%, #a3b89e, transparent 70%), #2a3133; }
.art-tide  { background: radial-gradient(70% 80% at 50% 20%, #d8c3a5, transparent 70%), radial-gradient(60% 70% at 15% 85%, #9fb3a1, transparent 70%), #34302a; }
.game-art .glyph {
  position: absolute; z-index: 1; left: var(--space-3); top: var(--space-3);
  font-family: var(--mono); font-size: var(--fs-xs); color: var(--text);
  background: rgba(29,27,25,0.7); padding: 0.3rem 0.65rem; border-radius: 8px;
}
.game-body { padding: var(--space-3); display: flex; flex-direction: column; flex: 1; }
.game-body p { font-size: var(--fs-sm); }
.game-body .btn { margin-top: auto; align-self: flex-start; }
.status { font-size: var(--fs-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--sage); margin-bottom: 0.4rem; }

/* ---------- Feature / capability tiles ---------- */
.tiles { display: grid; gap: var(--space-2); }
.tile {
  padding: var(--space-3); border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(236,230,223,0.05), rgba(236,230,223,0.01));
  border: 1px solid var(--line);
}
.tile-icon {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: var(--space-2);
  display: grid; place-items: center; color: var(--on-accent);
}
.tile-icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ti-sand { background: var(--sand); } .ti-sage { background: var(--sage); }
.ti-rose { background: var(--rose); } .ti-slate { background: var(--slate); }
.tile h3 { font-size: 1.125rem; margin-bottom: 0.5rem; }
.tile p { font-size: var(--fs-sm); margin: 0; }

/* ---------- Code / terminal block (dev audience) ---------- */
.terminal {
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
  background: #161513; font-family: var(--mono); font-size: 0.875rem;
}
.terminal-bar { display: flex; gap: 6px; padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); }
.terminal-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--bg-soft); }
.terminal-bar span:nth-child(1) { background: var(--rose); }
.terminal-bar span:nth-child(2) { background: var(--sand); }
.terminal-bar span:nth-child(3) { background: var(--sage); }
.terminal pre { margin: 0; padding: var(--space-3); overflow-x: auto; color: var(--text); line-height: 1.7; }
.terminal .c { color: #a39a90; }   /* comment: 6.4:1 */
.terminal .k { color: var(--rose); }
.terminal .s { color: var(--sage); }
.terminal .f { color: var(--sand); }

/* ---------- Pricing (conversion) ---------- */
.pricing { display: grid; gap: var(--space-3); }
.plan {
  position: relative; display: flex; flex-direction: column;
  padding: var(--space-4) var(--space-3); border-radius: var(--radius);
  background: var(--bg-elev); border: 1px solid var(--line);
}
.plan--featured {
  border-color: transparent;
  background:
    linear-gradient(var(--bg-elev), var(--bg-elev)) padding-box,
    linear-gradient(135deg, var(--sand), var(--rose), var(--slate)) border-box;
  border: 1px solid transparent;
}
.plan-badge {
  position: absolute; top: -12px; left: var(--space-3);
  background: var(--sand); color: var(--on-accent);
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.3rem 0.75rem; border-radius: 999px;
}
.plan h3 { font-size: 1.125rem; letter-spacing: 0.02em; }
.price { font-size: 2.75rem; font-weight: 300; color: var(--text); letter-spacing: -0.03em; margin: var(--space-1) 0; }
.price small { font-size: var(--fs-sm); color: var(--text-muted); letter-spacing: 0; }
.plan ul { list-style: none; margin: var(--space-2) 0 var(--space-3); padding: 0; display: grid; gap: 0.6rem; font-size: var(--fs-sm); color: var(--text-muted); }
.plan li { padding-left: 1.5rem; position: relative; }
.plan li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--sage); }
.plan .btn { margin-top: auto; }

/* ---------- Spec table (game detail) ---------- */
.specs { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.specs th, .specs td { text-align: left; padding: 0.9rem 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.specs th { width: 38%; color: var(--text-muted); font-weight: 500; padding-right: var(--space-2); }
.specs td { color: var(--text); }

/* Split variant: align-items:flex-start for side-by-side cards */
.split--top { align-items: flex-start; }

/* ---------- Timeline (roadmap) ---------- */
.timeline { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.timeline li { position: relative; padding: 0 0 var(--space-3) var(--space-3); }
.timeline li::before { content: ""; position: absolute; left: -6px; top: 0.45em; width: 11px; height: 11px; border-radius: 50%; background: var(--bg); border: 2px solid var(--sand); }
.timeline li.done::before { background: var(--sand); }
.timeline strong { display: block; color: var(--text); font-weight: 600; }
.timeline span { font-size: var(--fs-sm); color: var(--text-muted); }

/* ---------- Stats strip ---------- */
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
.stat strong { display: block; font-size: clamp(2rem, 5vw, 3rem); font-weight: 300; color: var(--text); letter-spacing: -0.03em; }
.stat span { font-size: var(--fs-xs); color: var(--text-muted); letter-spacing: 0.1em; text-transform: uppercase; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; gap: var(--space-2); }
.contact-card {
  display: flex; gap: var(--space-2); align-items: flex-start;
  padding: var(--space-3); border-radius: var(--radius-sm);
  background: var(--bg-elev); border: 1px solid var(--line);
}
.contact-card .tile-icon { margin: 0; flex: none; }
.contact-card h3 { font-size: var(--fs-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-muted); font-weight: 500; margin-bottom: 0.35rem; }
.contact-card p, .contact-card a { margin: 0; color: var(--text); font-size: var(--fs-md); word-break: break-word; }
.contact-card a:hover { color: var(--sand); }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative; overflow: hidden; isolation: isolate;
  border-radius: calc(var(--radius) + 8px); padding: var(--space-5) var(--space-3); text-align: center;
  background: var(--bg-soft); border: 1px solid var(--line);
}
.cta-band::before {
  content: ""; position: absolute; inset: -40%; z-index: -1; filter: blur(60px); opacity: 0.5;
  background:
    radial-gradient(30% 40% at 30% 40%, var(--rose), transparent 70%),
    radial-gradient(30% 40% at 70% 60%, var(--slate), transparent 70%);
  animation: drift-a 20s var(--ease) infinite alternate;
}
.cta-band p { max-width: 560px; margin-inline: auto; color: var(--text); opacity: 0.85; }
.cta-band .hero-cta { justify-content: center; }

/* section--flush: reduce top padding (for consecutive sections) */
.section--flush { padding-top: 0; }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (min-width: 768px) {
  .game-grid { grid-template-columns: repeat(3, 1fr); }
  .tiles { grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
  .pricing { grid-template-columns: repeat(3, 1fr); align-items: stretch; }
  .stats { grid-template-columns: repeat(4, 1fr); }
  .contact-grid { grid-template-columns: repeat(3, 1fr); }
  .cta-band { padding: var(--space-6) var(--space-4); }
}
@media (min-width: 1100px) {
  .tiles--4 { grid-template-columns: repeat(4, 1fr); }
}