/* ==========================================================================
   terrain.css — wrapper, HTML waypoint labels and pause toggle for terrain.js
   Markup:
     <div class="terrain" data-terrain="home">
       <canvas class="terrain__canvas" aria-hidden="true"></canvas>
       <div class="terrain__labels" aria-hidden="true" data-wc-ignore></div>
       <button type="button" class="terrain-toggle" aria-pressed="false" hidden></button>
     </div>
   Palette = CSS custom properties (read by terrain.js from the canvas).
   ========================================================================== */

.terrain{
  /* palette — defaults from the v1 tokens, with fallbacks so it works standalone */
  --terrain-bg:var(--bg-0, #0B0D0C);
  --terrain-fog:#161E1B;
  --terrain-line:#A7BCC2;
  --terrain-line-alpha:.6;
  --terrain-peak:var(--accent, #FF9F1C);
  --terrain-peak-alpha:.92;
  --terrain-scan:var(--intel, #6FD3E8);
  --terrain-wp:var(--intel, #6FD3E8);
  --terrain-drop:var(--accent, #FF9F1C);
  --terrain-exfil:var(--ok, #7CCB8B);
  /* atmosphere */
  --terrain-glow:rgb(255 159 28 / .10);       /* horizon haze */
  --terrain-calm:.88;                          /* 0..1 darkening of the headline zone */
  --terrain-calm-x:16%; --terrain-calm-y:40%;  /* headline zone centre */
  --terrain-calm-w:66%; --terrain-calm-h:72%;
  --terrain-fade:var(--bg-0, #0B0D0C);         /* colour the bottom edge dissolves into */
  --terrain-horizon:44%;                       /* set live by terrain.js */

  position:relative;
  overflow:hidden;
  isolation:isolate;
  contain:paint;
  background:
    linear-gradient(180deg,
      var(--terrain-bg-live, var(--terrain-bg)) 0%,
      var(--terrain-fog-live, var(--terrain-fog)) var(--terrain-horizon),
      var(--terrain-bg-live, var(--terrain-bg)) 100%);
}
/* full-bleed usage: .terrain--fill fills its positioned parent */
.terrain--fill{position:absolute; inset:0; z-index:0}

.terrain__canvas{
  position:absolute; inset:0;
  display:block; width:100%; height:100%;
}

/* JS-off / not-yet-mounted fallback: one static frame of the home preset, pre-rendered by
   qa/v2/T/gen-fallback.js from terrain.js itself (hidden once the canvas is live) */
.terrain::before{
  content:""; position:absolute; inset:0; z-index:0; pointer-events:none;
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}
.terrain.is-live::before{display:none}

/* atmosphere overlay: calm headline zone + edge vignette + bottom dissolve (no canvas cost) */
.terrain::after{
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    radial-gradient(90% 30% at 64% var(--terrain-horizon), var(--terrain-glow), transparent 72%),
    radial-gradient(var(--terrain-calm-w) var(--terrain-calm-h) at var(--terrain-calm-x) var(--terrain-calm-y),
      rgb(11 13 12 / var(--terrain-calm)) 0%, rgb(11 13 12 / calc(var(--terrain-calm) * .55)) 45%, transparent 100%),
    linear-gradient(180deg, transparent 72%, var(--terrain-fade) 100%),
    radial-gradient(140% 110% at 50% 45%, transparent 55%, rgb(0 0 0 / .45) 100%);
}

/* ── HTML waypoint labels (crisp text over the canvas) ── */
.terrain__labels{position:absolute; inset:0; z-index:2; pointer-events:none; overflow:hidden}
.terrain-wp{
  --wp-c:var(--terrain-wp);
  position:absolute; left:0; top:0;
  display:flex; align-items:stretch; gap:0;
  font:500 11px/1 var(--ff-mono, "JetBrains Mono", ui-monospace, monospace);
  letter-spacing:.08em; text-transform:uppercase; white-space:nowrap;
  color:var(--text, #E9E7DF);
  transition:opacity .3s ease;
  will-change:transform;
}
.terrain-wp--drop{--wp-c:var(--terrain-drop)}
.terrain-wp--exfil{--wp-c:var(--terrain-exfil)}
.terrain-wp__code{
  padding:4px 6px; background:var(--wp-c); color:var(--terrain-bg, #0B0D0C); font-weight:700;
}
.terrain-wp__label{
  padding:4px 8px 4px 7px;
  background:rgb(11 13 12 / .78);
  border:1px solid color-mix(in srgb, var(--wp-c) 55%, transparent);
  border-left:0;
}
.terrain-wp.is-off{opacity:0}
.terrain-wp.is-flip{flex-direction:row-reverse}
.terrain-wp.is-flip .terrain-wp__label{border-left:1px solid color-mix(in srgb, var(--wp-c) 55%, transparent); border-right:0}
.terrain-wp.is-ping .terrain-wp__label{border-color:var(--wp-c); color:#fff}
@media (max-width:767px){
  .terrain{--terrain-calm-x:40%; --terrain-calm-y:22%; --terrain-calm-w:130%; --terrain-calm-h:60%}
  .terrain-wp{font-size:10px}
  .terrain-wp__label{padding:3px 6px}
  .terrain-wp__code{padding:3px 5px}
}

/* ── pause / play toggle (WCAG 2.2.2). Pages place it in a hero corner. ── */
.terrain-toggle{
  position:absolute; right:var(--gutter, 16px); bottom:var(--gutter, 16px); z-index:3;
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-width:44px; min-height:44px; padding:0 12px;
  font:500 12px/1 var(--ff-mono, "JetBrains Mono", ui-monospace, monospace);
  letter-spacing:.08em; text-transform:uppercase;
  color:var(--text-2, #B9B8AE);
  background:rgb(11 13 12 / .72);
  border:1px solid var(--line-strong, #6E786F);
  border-radius:var(--radius, 2px);
  cursor:pointer;
  transition:color var(--dur-hover, 160ms) ease, border-color var(--dur-hover, 160ms) ease, background-color var(--dur-hover, 160ms) ease;
}
.terrain-toggle[hidden]{display:none}
/* canonical placement (SPEC-v2 §5, G0-09) — pages do NOT override:
   hero → top-right just below the header, inside the first viewport · deploy band → bottom-right */
.hero .terrain-toggle{top:calc(var(--header-h, 60px) + 12px); right:var(--gutter, 16px); bottom:auto; left:auto; z-index:3}
.deploy-cta .terrain-toggle{bottom:var(--gutter, 16px); right:var(--gutter, 16px); top:auto; left:auto}
.terrain-toggle:hover{color:var(--text, #E9E7DF); border-color:var(--accent, #FF9F1C)}
.terrain-toggle:focus-visible{outline:2px solid var(--focus, #FF9F1C); outline-offset:2px}
.terrain-toggle__icon{width:14px; height:14px; fill:currentColor; flex:none}
.terrain-toggle__icon--play{display:none}
.terrain-toggle.is-paused .terrain-toggle__icon--play,
.terrain-toggle[aria-pressed="true"] .terrain-toggle__icon--play{display:block}
.terrain-toggle.is-paused .terrain-toggle__icon--pause,
.terrain-toggle[aria-pressed="true"] .terrain-toggle__icon--pause{display:none}
@media (max-width:767px){
  .terrain-toggle{padding:0; width:44px}
  .terrain-toggle__text{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap}
}

/* ── palette presets (geometry/motion presets live in terrain.js) ── */
.terrain[data-terrain="partner"]{
  --terrain-line:#9FB0B8; --terrain-line-alpha:.5; --terrain-fog:#141B1C;
  --terrain-peak:#E0C063; --terrain-peak-alpha:.62; --terrain-glow:rgb(111 211 232 / .07);
}
.terrain[data-terrain="sponsor"]{
  --terrain-line:#A9ADA5; --terrain-line-alpha:.5; --terrain-fog:#17191A;
  --terrain-peak:#E0C063; --terrain-peak-alpha:.7; --terrain-glow:rgb(224 192 99 / .07);
}
.terrain[data-terrain="creator"]{
  --terrain-line:#B3B7C9; --terrain-fog:#18171F; --terrain-glow:rgb(184 163 242 / .08);
}
.terrain[data-terrain="roadmap"]{
  --terrain-line:#A7BCC2; --terrain-line-alpha:.55; --terrain-peak:#E0C063; --terrain-peak-alpha:.78;
}
.terrain[data-terrain="exfil"]{
  --terrain-line:#8FC49B; --terrain-line-alpha:.55; --terrain-fog:#132019;
  --terrain-peak:#7CCB8B; --terrain-scan:#7CCB8B; --terrain-glow:rgb(124 203 139 / .12);
}

@media print{
  .terrain-toggle,.terrain__labels{display:none}
}