/* ============================================================
   CODEBREAK · AI HEALTHCHECK - HUD SYSTEM
   Retro-future targeting display. Yellow primary, amber data,
   red alert. Near-black field. Moderate CRT.
   ============================================================ */

@font-face {
  font-family: 'Montserrat';
  src: url('fonts/Montserrat-VariableFont_wght.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600;700&display=swap');

:root {
  /* Field */
  --void:        #050604;
  --void-2:      #0a0c08;
  --panel:       #0e120b;
  --panel-line:  rgba(255, 232, 0, 0.14);

  /* System colours */
  --sys:         #ffe800;            /* Codebreak yellow - primary system */
  --sys-dim:     #b9a900;
  --sys-deep:    #6b6300;
  --amber:       #ff9e2c;            /* data / warnings */
  --amber-dim:   #a9621a;
  --red:         #ff2b2b;            /* alert / threat */
  --red-dim:     #8c1414;
  --ink:         #e8ecd8;            /* light readout text */
  --ink-mute:    #7d8466;           /* dim mono text */
  --ink-faint:   #4a4f3a;

  --glow-sys:    0 0 1px rgba(255,232,0,.9), 0 0 8px rgba(255,232,0,.45);
  --glow-sys-lg: 0 0 2px rgba(255,232,0,.9), 0 0 22px rgba(255,232,0,.55), 0 0 48px rgba(255,232,0,.25);
  --glow-amber:  0 0 1px rgba(255,158,44,.9), 0 0 10px rgba(255,158,44,.5);
  --glow-red:    0 0 1px rgba(255,43,43,.9), 0 0 12px rgba(255,43,43,.55);

  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --disp: 'Montserrat', system-ui, sans-serif;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--void);
  color: var(--ink);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

#root { height: 100%; }

/* ---- selection / scrollbars in-world ---- */
::selection { background: var(--sys); color: #000; }

/* ============================================================
   STAGE - full-bleed responsive HUD field
   ============================================================ */
.stage {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(120% 90% at 50% 8%, rgba(255,232,0,.05), transparent 55%),
    radial-gradient(140% 120% at 50% 120%, rgba(255,158,44,.045), transparent 60%),
    var(--void);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* The breathing inner field where each screen lives */
.field {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: clamp(54px, 7vw, 96px) clamp(20px, 4vw, 64px);
  overflow-y: auto;
  overflow-x: hidden;
}
/* main content block: vertically centered when it fits, scrolls when it doesn't */
.screen { margin-block: auto; width: 100%; }

/* ============================================================
   CRT OVERLAYS  (moderate - readable)
   ============================================================ */
/* fine scanlines */
.crt-scan {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 9000;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(0,0,0,.22) 3px,
    rgba(0,0,0,0) 4px
  );
  mix-blend-mode: multiply;
  opacity: .55;
}
/* subtle moving sweep */
.crt-sweep {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 9001;
  background: linear-gradient(to bottom, transparent 0%, rgba(255,232,0,.035) 48%, rgba(255,232,0,.06) 50%, transparent 52%);
  background-size: 100% 240px;
  animation: sweep 7s linear infinite;
}
@keyframes sweep { from { background-position: 0 -260px; } to { background-position: 0 100vh; } }

/* vignette + corner darkening */
.crt-vignette {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 9002;
  background: radial-gradient(120% 100% at 50% 50%, transparent 55%, rgba(0,0,0,.55) 100%);
}
/* very subtle global flicker */
.crt-flicker {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 9003;
  background: rgba(255,232,0,.012);
  animation: flick 6s steps(60) infinite;
}
@keyframes flick {
  0%,100%{opacity:.5} 3%{opacity:.2} 6%{opacity:.7} 9%{opacity:.35}
  50%{opacity:.55} 51%{opacity:.15} 52%{opacity:.6} 80%{opacity:.4}
}
@media (prefers-reduced-motion: reduce) {
  .crt-sweep, .crt-flicker { animation: none; }
}

/* ============================================================
   PERSISTENT HUD CHROME - corner brackets + frame
   ============================================================ */
.hud-frame { pointer-events: none; position: fixed; inset: 0; z-index: 50; }
.hud-frame .edge {
  position: absolute;
  background: linear-gradient(var(--dir, 90deg), var(--sys), transparent);
}
.bracket {
  position: absolute;
  width: clamp(24px, 4vw, 54px);
  height: clamp(24px, 4vw, 54px);
}
.bracket::before, .bracket::after {
  content: ''; position: absolute; background: var(--sys);
  box-shadow: var(--glow-sys);
}
.bracket::before { width: 100%; height: 2px; }
.bracket::after  { width: 2px; height: 100%; }
.bracket.tl { top: clamp(12px,2.4vw,26px); left: clamp(12px,2.4vw,26px); }
.bracket.tl::before { top: 0; left: 0; }
.bracket.tl::after  { top: 0; left: 0; }
.bracket.tr { top: clamp(12px,2.4vw,26px); right: clamp(12px,2.4vw,26px); }
.bracket.tr::before { top: 0; right: 0; }
.bracket.tr::after  { top: 0; right: 0; }
.bracket.bl { bottom: clamp(12px,2.4vw,26px); left: clamp(12px,2.4vw,26px); }
.bracket.bl::before { bottom: 0; left: 0; }
.bracket.bl::after  { bottom: 0; left: 0; }
.bracket.br { bottom: clamp(12px,2.4vw,26px); right: clamp(12px,2.4vw,26px); }
.bracket.br::before { bottom: 0; right: 0; }
.bracket.br::after  { bottom: 0; right: 0; }

/* top + bottom status rails */
.rail {
  position: fixed; left: 0; right: 0; z-index: 60;
  display: flex; align-items: center; gap: 14px;
  padding: 0 clamp(14px, 3.2vw, 38px);
  height: 30px;
  font-size: 10.5px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-mute);
  pointer-events: none;
  user-select: none;
}
.rail.top { top: clamp(10px,2vw,20px); }
.rail.bot { bottom: clamp(10px,2vw,20px); }
.rail .spacer { flex: 1; }
.rail .tick { color: var(--sys); text-shadow: var(--glow-sys); }
.rail .dot {
  width: 6px; height: 6px; background: var(--sys); border-radius: 0;
  box-shadow: var(--glow-sys); animation: pulse 1.6s var(--ease) infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.25} }

/* ============================================================
   TYPOGRAPHY HELPERS
   ============================================================ */
.disp {
  font-family: var(--disp);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: .92;
}
.label {
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .26em;
  font-size: 11px;
  color: var(--sys);
  text-shadow: var(--glow-sys);
}
.sys-line { color: var(--sys); text-shadow: var(--glow-sys); }
.amber-line { color: var(--amber); text-shadow: var(--glow-amber); }
.red-line { color: var(--red); text-shadow: var(--glow-red); }
.mute { color: var(--ink-mute); }
.faint { color: var(--ink-faint); }

.cursor {
  display: inline-block; width: .58em; height: 1.05em;
  background: var(--sys); box-shadow: var(--glow-sys);
  margin-left: 2px; transform: translateY(.16em);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 0%,49%{opacity:1} 50%,100%{opacity:0} }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  position: relative;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: #000;
  background: var(--sys);
  border: none;
  padding: 16px 30px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 14px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  box-shadow: var(--glow-sys-lg);
  transition: transform var(--ease) 150ms, box-shadow var(--ease) 150ms, background 150ms;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 0 2px #fff, 0 0 30px rgba(255,232,0,.8), 0 0 60px rgba(255,232,0,.4); }
.btn:active { transform: translateY(0) scale(.985); }
.btn .arrow { font-weight: 700; }

.btn-ghost {
  background: transparent;
  color: var(--sys);
  border: 1.5px solid var(--sys);
  box-shadow: none;
  text-shadow: var(--glow-sys);
}
.btn-ghost:hover { background: rgba(255,232,0,.1); box-shadow: var(--glow-sys); transform: translateY(-2px); }

.skip {
  position: fixed; z-index: 9100;
  bottom: clamp(20px,4vw,40px); right: clamp(20px,4vw,40px);
  background: transparent; border: 1px solid var(--ink-faint);
  color: var(--ink-mute); font-family: var(--mono); font-size: 11px;
  letter-spacing: .22em; text-transform: uppercase;
  padding: 9px 16px; cursor: pointer; white-space: nowrap;
  display: inline-flex; align-items: center; gap: 10px;
  transition: all 150ms var(--ease);
}
.skip:hover { color: var(--sys); border-color: var(--sys); box-shadow: var(--glow-sys); }

/* ============================================================
   ANIMATION UTILITIES
   ============================================================ */
@keyframes scanIn {
  0%   { opacity: 0; clip-path: inset(0 0 100% 0); filter: brightness(2.4); }
  60%  { opacity: 1; clip-path: inset(0 0 0 0); }
  100% { opacity: 1; clip-path: inset(0 0 0 0); filter: brightness(1); }
}
.scan-in { animation: scanIn 600ms var(--ease) both; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp 500ms var(--ease) both; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.fade-in { animation: fadeIn 600ms var(--ease) both; }

.glitch { animation: glitch 220ms steps(2) 1; }
@keyframes glitch {
  0%{transform:translate(0)} 25%{transform:translate(-2px,1px)}
  50%{transform:translate(2px,-1px)} 75%{transform:translate(-1px,-1px)} 100%{transform:translate(0)}
}

/* scrollbar */
.field::-webkit-scrollbar { width: 8px; }
.field::-webkit-scrollbar-track { background: transparent; }
.field::-webkit-scrollbar-thumb { background: var(--sys-deep); }

/* ============================================================
   PRODUCTION ADDITIONS - number input, CTA links
   ============================================================ */
input[type='number']::-webkit-outer-spin-button,
input[type='number']::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type='number'] { -moz-appearance: textfield; appearance: textfield; }

a.btn { text-decoration: none; }

/* rails keep legible while long screens (results) scroll beneath */
.rail.top { background: linear-gradient(to bottom, rgba(5,6,4,.92) 40%, transparent); }
.rail.bot { background: linear-gradient(to top, rgba(5,6,4,.92) 40%, transparent); }

/* narrow screens - keep the top rail to a single line */
@media (max-width: 640px) {
  .rail .hide-sm { display: none; }
}