/* ── FIELDBRAIN pitch deck · dark tactical command console ── */
:root {
  --bg: #060a07;
  --surface: #0c130e;
  --surface-2: #101a13;
  --line: rgba(110, 231, 149, 0.16);
  --line-strong: rgba(110, 231, 149, 0.38);
  --text: #dce8dd;
  --dim: #8aa091;
  --faint: #5c7263;
  --green: #5fe08c;
  --amber: #ffb454;
  --red: #ff6f61;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard", "Malgun Gothic", sans-serif;
  --maxw: 1100px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-snap-type: y mandatory; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.6;
  overflow-x: hidden;
}

/* atmosphere: grid + scanlines + vignette */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 120% 90% at 50% 0%, rgba(95, 224, 140, 0.05), transparent 60%),
    repeating-linear-gradient(0deg, transparent 0 2px, rgba(0, 0, 0, 0.14) 2px 4px),
    linear-gradient(rgba(110, 231, 149, 0.033) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 231, 149, 0.033) 1px, transparent 1px);
  background-size: auto, auto, 52px 52px, 52px 52px;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(ellipse 90% 80% at 50% 55%, transparent 55%, rgba(3, 5, 4, 0.72));
}

/* classification banners */
.class-banner {
  position: fixed; left: 0; right: 0; z-index: 50;
  display: flex; justify-content: center; align-items: center; gap: 0.6em;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.22em;
  color: var(--amber); background: rgba(6, 10, 7, 0.9);
  border-bottom: 1px solid rgba(255, 180, 84, 0.25);
  padding: 5px 0; text-transform: uppercase;
}
.class-banner.bottom { top: auto; bottom: 0; border-bottom: none; border-top: 1px solid rgba(255, 180, 84, 0.25); }
.class-banner .dot { color: var(--faint); }

/* HUD chrome */
.hud {
  position: fixed; z-index: 40; font-family: var(--mono); font-size: 11px;
  color: var(--faint); letter-spacing: 0.12em;
}
.hud.counter { right: 28px; bottom: 34px; color: var(--dim); }
.hud.counter b { color: var(--green); font-weight: 600; }
.hud.keys { left: 28px; bottom: 34px; }
.hud.keys kbd {
  font-family: inherit; border: 1px solid var(--line-strong); border-radius: 3px;
  padding: 1px 5px; margin: 0 2px; color: var(--dim);
}
.progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 100%;
  transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--green), var(--amber));
  z-index: 60; transition: transform 0.2s linear;
}

/* slides */
.slide {
  position: relative; z-index: 1;
  min-height: 100vh; min-height: 100svh;
  scroll-snap-align: start;
  display: flex; align-items: center;
  padding: clamp(64px, 8vh, 96px) clamp(20px, 5vw, 64px);
}
.slide > .wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; }

.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.28em;
  text-transform: uppercase; color: var(--green); margin-bottom: 18px;
  display: flex; align-items: center; gap: 12px;
}
.kicker::before { content: ""; width: 26px; height: 1px; background: var(--green); }
.kicker .idx { color: var(--faint); }

h1, h2 { font-weight: 750; letter-spacing: -0.02em; line-height: 1.16; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.7rem); margin-bottom: 14px; }
h2 .hl { color: var(--green); }
h2 .hl-a { color: var(--amber); }
.lede { color: var(--dim); max-width: 62ch; font-size: 1.02em; }

/* corner-bracket frame */
.frame { position: relative; background: var(--surface); border: 1px solid var(--line); }
.frame::before, .frame::after {
  content: ""; position: absolute; width: 14px; height: 14px; pointer-events: none;
}
.frame::before { top: -1px; left: -1px; border-top: 2px solid var(--line-strong); border-left: 2px solid var(--line-strong); }
.frame::after { bottom: -1px; right: -1px; border-bottom: 2px solid var(--line-strong); border-right: 2px solid var(--line-strong); }

/* generic grids & cards */
.grid { display: grid; gap: 14px; margin-top: 34px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.card { padding: 20px 22px; }
.card h3 { font-size: 1.02em; margin-bottom: 6px; color: var(--text); }
.card h3 .tag { font-family: var(--mono); font-size: 0.72em; color: var(--green); margin-right: 6px; }
.card p { font-size: 0.9em; color: var(--dim); }
.card .src { display: block; margin-top: 10px; font-family: var(--mono); font-size: 10px; color: var(--faint); letter-spacing: 0.06em; }

/* stat cards */
.stat { padding: 24px 22px; }
.stat .num { font-family: var(--mono); font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; color: var(--amber); line-height: 1.1; }
.stat .num.g { color: var(--green); }
.stat .num.r { color: var(--red); }
.stat .lbl { margin-top: 8px; font-size: 0.9em; color: var(--dim); }

/* 2x2 quadrant */
.quad-wrap { margin-top: 40px; position: relative; padding: 0 0 34px 40px; }
.axis { position: absolute; font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; color: var(--faint); text-transform: uppercase; }
.axis.y { left: 6px; top: 0; bottom: 34px; display: flex; align-items: center; writing-mode: vertical-rl; transform: rotate(180deg); white-space: nowrap; }
.axis.x { left: 50%; bottom: 0; transform: translateX(-50%); }
.quad { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 10px; }
.q { padding: 18px 20px; min-height: 150px; background: var(--surface); border: 1px dashed var(--line); }
.q h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; color: var(--faint); text-transform: uppercase; margin-bottom: 10px; }
.q ul { list-style: none; }
.q li { font-size: 0.88em; color: var(--dim); padding: 2px 0; }
.q li b { color: var(--text); font-weight: 600; }
.q li .note { color: var(--faint); font-size: 0.86em; }
.q.ours { border: 1px solid var(--green); background: rgba(95, 224, 140, 0.06); box-shadow: 0 0 34px rgba(95, 224, 140, 0.12) inset, 0 0 22px rgba(95, 224, 140, 0.07); }
.q.ours h4 { color: var(--green); }
.q.ours .big { font-size: 1.25em; font-weight: 750; color: var(--green); letter-spacing: -0.01em; }
.q.ours p { font-size: 0.86em; color: var(--dim); margin-top: 6px; }

/* demo mock */
.demo-steps { counter-reset: step; margin-top: 30px; display: grid; gap: 8px; }
.step { display: grid; grid-template-columns: 44px 84px 1fr; align-items: baseline; gap: 14px; padding: 12px 16px; background: var(--surface); border: 1px solid var(--line); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: var(--mono); color: var(--green); font-size: 1.05em; font-weight: 600;
}
.step .t { font-family: var(--mono); font-size: 11px; color: var(--amber); letter-spacing: 0.08em; }
.step .d { font-size: 0.92em; color: var(--text); }
.step .d em { color: var(--green); font-style: normal; font-weight: 650; }
.step.wow { border-color: var(--line-strong); background: rgba(95, 224, 140, 0.05); }

.mock { margin-top: 26px; display: grid; grid-template-columns: 1fr 1.25fr; gap: 12px; font-family: var(--mono); font-size: 12px; }
.pane { padding: 0; overflow: hidden; }
.pane .bar { display: flex; gap: 8px; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--line); color: var(--faint); font-size: 10.5px; letter-spacing: 0.1em; }
.pane .bar i { width: 7px; height: 7px; border-radius: 50%; background: var(--faint); opacity: 0.5; }
.pane .body { padding: 14px 16px; line-height: 1.75; }
.pane .body .c-g { color: var(--green); }
.pane .body .c-a { color: var(--amber); }
.pane .body .c-d { color: var(--dim); }
.pane .body .c-r { color: var(--red); }
.chip { display: inline-block; border: 1px solid var(--line-strong); border-radius: 3px; padding: 0 6px; margin: 2px 2px; color: var(--green); font-size: 11px; }
.chip.a { border-color: rgba(255, 180, 84, 0.5); color: var(--amber); }

/* pipeline diagram */
.pipe { display: flex; flex-wrap: wrap; align-items: stretch; gap: 0; margin-top: 34px; }
.node { flex: 1 1 150px; padding: 16px 14px; text-align: center; }
.node .nh { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; color: var(--green); text-transform: uppercase; margin-bottom: 6px; }
.node .nb { font-size: 0.84em; color: var(--dim); line-height: 1.5; }
.node .nb b { color: var(--text); }
.arrow { flex: 0 0 34px; display: flex; align-items: center; justify-content: center; color: var(--faint); font-family: var(--mono); }
.pipe-foot { margin-top: 16px; font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.08em; }
.pipe-foot b { color: var(--amber); font-weight: 600; }

/* vault tree + arch grid */
.arch { display: grid; grid-template-columns: 1.05fr 1fr; gap: 14px; margin-top: 30px; }
.arch .ops { display: grid; gap: 10px; align-content: start; }
.tree { font-family: var(--mono); font-size: 12.5px; line-height: 1.85; padding: 18px 20px; color: var(--dim); white-space: pre; overflow-x: auto; }
.tree b { color: var(--text); font-weight: 600; }
.tree .tg { color: var(--green); }
.tree .ta { color: var(--amber); }
.op { padding: 14px 18px; }
.op h3 { font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em; color: var(--green); text-transform: uppercase; margin-bottom: 5px; }
.op h3 .ko { color: var(--dim); letter-spacing: 0; margin-left: 6px; }
.op p { font-size: 0.87em; color: var(--dim); }
.op p b { color: var(--text); }
.op.lint h3 { color: var(--amber); }
.flag { color: var(--red); }

/* tables */
table { width: 100%; border-collapse: collapse; margin-top: 30px; font-size: 0.88em; }
th { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--green); text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line-strong); }
td { padding: 10px 12px; border-bottom: 1px solid var(--line); color: var(--dim); vertical-align: top; }
td b { color: var(--text); font-weight: 600; }
td .m { font-family: var(--mono); font-size: 0.9em; color: var(--amber); }
tr.ours td { background: rgba(95, 224, 140, 0.055); color: var(--text); }

/* checklist / gate */
.gate { margin-top: 30px; padding: 20px 24px; border-left: 3px solid var(--amber); }
.gate .gh { font-family: var(--mono); font-size: 11px; color: var(--amber); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 8px; }
.gate p { font-size: 0.94em; color: var(--text); }
.gate p b { color: var(--amber); }

ul.list { list-style: none; margin-top: 14px; }
ul.list li { padding: 7px 0 7px 24px; position: relative; font-size: 0.93em; color: var(--dim); border-bottom: 1px dashed var(--line); }
ul.list li::before { content: "▸"; position: absolute; left: 4px; color: var(--green); }
ul.list li b { color: var(--text); }
ul.list li .m { font-family: var(--mono); font-size: 0.88em; color: var(--amber); }

/* quote */
.quote { margin-top: 34px; padding: 22px 26px; font-size: 1.12em; line-height: 1.65; color: var(--text); }
.quote b { color: var(--green); }
.quote .who { display: block; margin-top: 10px; font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.12em; }

/* cover */
.cover { text-align: left; }
.cover .sys { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.2em; margin-bottom: 26px; }
.cover .sys b { color: var(--green); }
.cover h1 { font-size: clamp(2.6rem, 7vw, 5rem); letter-spacing: -0.03em; }
.cover h1 .fb { color: var(--green); font-family: var(--mono); font-weight: 700; }
.cover .sub { margin-top: 14px; font-size: clamp(1.05rem, 2vw, 1.4rem); color: var(--text); font-weight: 600; }
.cover .tagline { margin-top: 22px; font-size: 1.02em; color: var(--dim); max-width: 58ch; }
.cover .meta { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 12px 36px; font-family: var(--mono); font-size: 12px; color: var(--dim); letter-spacing: 0.08em; }
.cover .meta b { color: var(--amber); font-weight: 600; }
.blink { animation: blink 1.15s steps(2) infinite; color: var(--green); }
@keyframes blink { 50% { opacity: 0; } }

/* closing */
.close-line { font-size: clamp(1.5rem, 3.4vw, 2.4rem); font-weight: 720; line-height: 1.3; letter-spacing: -0.02em; max-width: 22ch; }
.close-line b { color: var(--green); }

/* reveal animation (compositor-friendly only) */
.fx { opacity: 0; transform: translateY(22px); }
.in .fx {
  opacity: 1; transform: translateY(0);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: calc(var(--i, 0) * 90ms);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fx { opacity: 1; transform: none; transition: none; }
  .blink { animation: none; }
}

@media (max-width: 860px) {
  .g2, .g3, .mock { grid-template-columns: 1fr; }
  .quad { grid-template-columns: 1fr; grid-template-rows: none; }
  .quad-wrap { padding-left: 0; }
  .axis { display: none; }
  .pipe { flex-direction: column; }
  .arrow { transform: rotate(90deg); padding: 4px 0; flex-basis: 22px; }
  .step { grid-template-columns: 34px 1fr; }
  .step .t { grid-column: 2; }
  .hud.keys { display: none; }
}