/* HUD layer: the futuristic look on top of app.css.
   Corner brackets, chamfered buttons, glowing type, scanlines, a light that
   runs along the top bar. Everything decorative is pointer-events: none and
   switches off with "reduce motion". */

:root {
  --glow: 0 0 18px color-mix(in srgb, var(--signal) 45%, transparent);
  --glow-soft: 0 0 32px color-mix(in srgb, var(--signal) 18%, transparent);
  --bracket: color-mix(in srgb, var(--signal) 85%, white);
  --cut-btn: 7px;
}

/* ---------- atmosphere ---------- */
body {
  background:
    radial-gradient(1100px 650px at 10% -12%, rgba(90, 209, 255, .14), transparent 62%),
    radial-gradient(900px 620px at 112% 6%, rgba(255, 111, 181, .09), transparent 60%),
    radial-gradient(800px 500px at 50% 120%, rgba(90, 209, 255, .07), transparent 60%),
    var(--night);
}
body::before {
  background-image:
    linear-gradient(rgba(90, 209, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 209, 255, .06) 1px, transparent 1px),
    linear-gradient(rgba(142, 163, 199, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(142, 163, 199, .025) 1px, transparent 1px);
  background-size: 96px 96px, 96px 96px, 24px 24px, 24px 24px;
  animation: grid-drift 60s linear infinite;
}
body::after {
  /* scanlines + vignette */
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .018) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, .35) 100%);
  mix-blend-mode: overlay;
}
@keyframes grid-drift { to { background-position: 0 96px, 96px 0, 0 24px, 24px 0; } }

/* ---------- type ---------- */
h1 {
  text-transform: uppercase;
  letter-spacing: .06em;
  background: linear-gradient(100deg, var(--frost) 30%, var(--signal) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 14px rgba(90, 209, 255, .25));
}
.page-head h1::before {
  content: '';
  display: inline-block;
  width: .32em;
  height: .82em;
  margin-right: .4em;
  vertical-align: -.04em;
  background: linear-gradient(var(--signal), var(--pulse));
  box-shadow: var(--glow);
  clip-path: polygon(0 0, 100% 18%, 100% 100%, 0 82%);
}
h2, h3.sub, .sub { letter-spacing: .04em; }
h3.sub, .sub { text-transform: uppercase; font-size: 12px; color: var(--haze); font-family: var(--font-display); }
.num { text-shadow: 0 0 10px rgba(90, 209, 255, .18); }

/* ---------- top bar ---------- */
.topbar {
  background: linear-gradient(180deg, rgba(7, 13, 26, .94), rgba(7, 13, 26, .78));
  border-bottom-color: transparent;
}
.topbar::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent, rgba(90, 209, 255, .9), rgba(255, 111, 181, .8), transparent) no-repeat,
    linear-gradient(90deg, var(--seam), var(--seam-bright) 50%, var(--seam));
  background-size: 28% 100%, 100% 100%;
  animation: bar-sweep 7s cubic-bezier(.6, 0, .4, 1) infinite;
}
@keyframes bar-sweep { from { background-position: -30% 0, 0 0; } to { background-position: 130% 0, 0 0; } }
.brand { text-transform: uppercase; letter-spacing: .12em; font-size: 15px; }
.brand svg { filter: drop-shadow(0 0 8px rgba(90, 209, 255, .65)); }
.nav a { text-transform: uppercase; letter-spacing: .08em; font-size: 13px; font-family: var(--font-display); position: relative; }
.nav a[aria-current='page'] {
  background: linear-gradient(180deg, transparent, rgba(90, 209, 255, .12));
  box-shadow: inset 0 -2px 0 var(--signal), 0 6px 18px -8px rgba(90, 209, 255, .8);
  text-shadow: 0 0 10px rgba(90, 209, 255, .6);
}

/* ---------- panels: corner brackets ---------- */
.plate::before,
.chapter-card::after,
.guide-card::after,
.goal-card::after,
.ai-card::after,
.ending::after,
.collect::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  --l: 14px;
  background:
    linear-gradient(var(--bracket), var(--bracket)) left top / var(--l) 1px no-repeat,
    linear-gradient(var(--bracket), var(--bracket)) left top / 1px var(--l) no-repeat,
    linear-gradient(var(--bracket), var(--bracket)) right bottom / var(--l) 1px no-repeat,
    linear-gradient(var(--bracket), var(--bracket)) right bottom / 1px var(--l) no-repeat;
  opacity: .55;
  transition: opacity .2s, --l .2s;
}
.plate::before { z-index: 1; }
.chapter-card:hover::after, .guide-card:hover::after, .goal-card:hover::after,
.chapter-card.selected::after, .guide-card.selected::after, .goal-card.selected::after { opacity: 1; }
.ai-card, .ending, .collect, .goal-card { position: relative; }
.plate { box-shadow: var(--glow-soft); }
.plate { background: linear-gradient(180deg, color-mix(in srgb, var(--hull-2) 92%, var(--signal)), var(--hull) 60%); }

/* chamfer the cards like the plates */
.chapter-card, .guide-card, .goal-card, .ending, .ai-card {
  border-radius: 2px;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}
.chapter-card.selected, .guide-card.selected { box-shadow: inset 0 0 0 1px var(--c), inset 0 0 40px -12px var(--c); }
.ending.got { box-shadow: inset 0 0 0 1px var(--c), inset 0 0 40px -14px var(--c); }

/* ---------- buttons ---------- */
.btn {
  border-radius: 2px;
  clip-path: polygon(0 0, calc(100% - var(--cut-btn)) 0, 100% var(--cut-btn), 100% 100%, var(--cut-btn) 100%, 0 calc(100% - var(--cut-btn)));
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 13px;
  font-family: var(--font-display);
  position: relative;
  overflow: hidden;
}
.btn:focus-visible { outline: 2px solid var(--frost); outline-offset: -4px; }
.btn-primary {
  background: linear-gradient(100deg, var(--signal), #8fe6ff);
  box-shadow: 0 0 22px -4px rgba(90, 209, 255, .7);
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, .55) 50%, transparent 65%);
  transform: translateX(-120%);
  transition: transform .6s var(--ease-out);
}
.btn-primary:hover::after { transform: translateX(120%); }
.btn-sm { font-size: 12px; }
.chip { letter-spacing: .03em; }

/* ---------- inputs ---------- */
.input:focus, select.input:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 1px var(--signal), 0 0 18px -4px rgba(90, 209, 255, .7);
}

/* ---------- AI toggle in the top bar ---------- */
.ai-toggle { font-family: var(--font-display); letter-spacing: .1em; }
.ai-toggle[data-state='watching'] { box-shadow: 0 0 0 1px var(--pulse), 0 0 18px -2px var(--pulse); }

/* ---------- page entrance ---------- */
#main > * { animation: hud-in .45s var(--ease-out) both; }
@keyframes hud-in { from { opacity: 0; transform: translateY(8px); filter: blur(2px); } }

/* ---------- scrollbars ---------- */
* { scrollbar-width: thin; scrollbar-color: var(--seam-bright) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--seam); border: 3px solid var(--night); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--signal); }

@media (prefers-reduced-motion: reduce) {
  body::before, .topbar::after, #main > * { animation: none; }
}
@media (max-width: 760px) {
  body::after { display: none; }
  .nav a { letter-spacing: .02em; font-size: 11px; }
}
.guide-card { position: relative; }
.section-title { margin: 22px 0 2px; color: var(--haze); }
.ai-panel .own-grid { grid-template-columns: minmax(0, 1fr); }
.btn-sm { padding-left: 12px; padding-right: 14px; }
.landing .brand-mark svg, .landing-card > svg { filter: drop-shadow(0 0 10px rgba(90, 209, 255, .7)); }
.landing-logo { filter: drop-shadow(0 0 12px rgba(90, 209, 255, .65)); }