/* Flybrain — DSC-family dark operational (Cyberdyne-adjacent) */

:root {
  --bg: #070809;
  --bg-2: #0e1214;
  --panel: rgba(18, 24, 28, 0.78);
  --text: #f2f5f4;
  --text-dim: #9aa8a3;
  --line: rgba(242, 245, 244, 0.12);
  --accent: #7f9e8f;
  --accent-hot: #b7d0c3;
  --signal: #d4e860;
  --font-display: "Syne", "Arial Black", sans-serif;
  --font-body: "Outfit", "Segoe UI", sans-serif;
  --pad: clamp(1.1rem, 3.5vw, 2.4rem);
  --max: 68rem;
  --nav-h: calc(4.5rem + env(safe-area-inset-top, 0px));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
  scroll-padding-top: var(--nav-h);
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

a {
  color: var(--accent-hot);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--signal);
  color: #111;
  padding: 0.5rem 0.75rem;
  z-index: 1000;
}

.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.25rem;
  border-radius: 0.15rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-solid {
  background: var(--signal);
  color: #10140c;
}

.btn-solid:hover {
  background: #e3f47a;
  color: #10140c;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--accent-hot);
  color: #fff;
}

.top {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 8, 9, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
}

.top-inner {
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin: 0 auto;
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--signal), #4a6b3a 70%);
  box-shadow: 0 0 0 1px rgba(212, 232, 96, 0.35);
}

.brand-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.top-nav {
  display: none;
  gap: 1.35rem;
}

.top-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.top-nav a:hover {
  color: var(--text);
}

.top-cta {
  display: none;
}

@media (min-width: 820px) {
  .top-nav,
  .top-cta {
    display: flex;
  }
}

.hero {
  position: relative;
  min-height: min(92vh, 52rem);
  display: grid;
  align-items: end;
  overflow: clip;
  border-bottom: 1px solid var(--line);
}

.hero-media,
.hero-atmosphere {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(242, 245, 244, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 245, 244, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 40% 30%, #000 20%, transparent 70%);
}

.hero-bloom {
  position: absolute;
  width: 60vmax;
  height: 60vmax;
  left: -10%;
  top: -20%;
  background: radial-gradient(circle, rgba(127, 158, 143, 0.22), transparent 65%);
  animation: bloom 12s var(--ease) infinite alternate;
}

@keyframes bloom {
  from { transform: translate(0, 0) scale(1); opacity: 0.7; }
  to { transform: translate(8%, 6%) scale(1.08); opacity: 1; }
}

.hero-stage {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin: 0 auto;
  padding: clamp(5rem, 14vh, 8rem) 0 clamp(3rem, 8vh, 5rem);
  animation: rise 0.9s var(--ease) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 8vw, 5.5rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.hero-line {
  margin: 0 0 1rem;
  max-width: 14ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.65rem, 4.2vw, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.08;
}

.hero-sub {
  margin: 0 0 1.6rem;
  max-width: 38rem;
  color: var(--text-dim);
  font-size: clamp(1.02rem, 2vw, 1.15rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.proof-strip {
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
}

.proof-strip-inner {
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin: 0 auto;
  padding: 1.15rem 0;
  display: grid;
  gap: 0.85rem;
}

.proof-strip-inner p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.proof-strip-inner strong {
  color: var(--text);
  font-weight: 600;
}

@media (min-width: 800px) {
  .proof-strip-inner {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.section {
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin: 0 auto;
  padding: clamp(3rem, 8vh, 5rem) 0;
}

.section-alt {
  width: 100%;
  padding-left: var(--pad);
  padding-right: var(--pad);
  background: var(--bg-2);
  border-block: 1px solid var(--line);
}

.section-alt .section-head,
.section-alt .steps {
  width: min(var(--max), 100%);
  margin-left: auto;
  margin-right: auto;
}

.section-head {
  margin-bottom: 2rem;
  max-width: 40rem;
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--text-dim);
}

.tier-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 840px) {
  .tier-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tier {
  padding: 1.35rem 1.25rem 1.45rem;
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.tier:hover {
  border-color: rgba(183, 208, 195, 0.45);
  transform: translateY(-2px);
}

.tier-id {
  margin: 0 0 0.35rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-transform: lowercase;
}

.tier-name {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.tier-pitch {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.98rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.step-n {
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--signal);
}

.steps h3 {
  margin: 0 0 0.3rem;
  font-size: 1.1rem;
}

.steps p {
  margin: 0;
  color: var(--text-dim);
}

.status-panel {
  padding: 1.5rem 1.35rem;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(127, 158, 143, 0.12), transparent 55%), var(--panel);
}

.status-label {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--signal);
}

.status-body {
  margin: 0;
  max-width: 36rem;
  color: var(--text-dim);
}

.foot {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
}

.foot-inner {
  width: min(var(--max), calc(100% - 2 * var(--pad)));
  margin: 0 auto;
}

.foot-brand {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
}

.foot-meta {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.foot-meta a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.foot-meta a:hover {
  border-color: var(--accent-hot);
}