:root {
  --ink: #090a08;
  --paper: #eee8cf;
  --green: #8ce782;
  --green-hot: #a9ff73;
  --orange: #ff7b2d;
  --purple: #be2bb8;
}

* { box-sizing: border-box; }

html {
  background: var(--ink);
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: "Arial Narrow", "Roboto Condensed", Impact, system-ui, sans-serif;
}

.mission-shell {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: radial-gradient(circle at 50% 16%, rgba(140, 231, 130, .13), transparent 28rem), var(--ink);
}

.hero-art {
  position: absolute;
  inset: 0;
  z-index: -3;
  background: url("background.gif") center / cover no-repeat;
  filter: saturate(.92) contrast(1.05);
}

.hero-art::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(9,10,8,.18), rgba(9,10,8,.34) 34%, rgba(9,10,8,.74) 70%, var(--ink)),
    radial-gradient(ellipse at center, transparent 30%, rgba(9,10,8,.58) 100%);
}

.screen-noise {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: .26;
  mix-blend-mode: soft-light;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(238,232,207,.11) 4px),
    repeating-linear-gradient(93deg, rgba(255,255,255,.035) 0 1px, transparent 1px 7px);
}

.mission-card {
  width: min(100%, 31rem);
  min-height: 100svh;
  margin: 0 auto;
  padding: max(1rem, env(safe-area-inset-top)) 1.1rem max(1.4rem, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
}

.signal-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .55rem;
  padding: .58rem .7rem;
  border: 1px solid rgba(140,231,130,.48);
  background: rgba(8,12,8,.68);
  color: var(--green);
  font: 700 .66rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.signal-dot {
  width: .48rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--green-hot);
  box-shadow: 0 0 .75rem var(--green-hot);
  animation: signal 1.7s steps(2, end) infinite;
}

.signal-code { color: rgba(238,232,207,.68); }

.title-lockup {
  padding: clamp(2.25rem, 10svh, 5.4rem) .25rem 1.5rem;
  text-align: center;
  text-transform: uppercase;
}

.eyebrow,
.subtitle {
  margin: 0;
  font: 700 .72rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .23em;
}

.eyebrow { color: var(--green); }

h1 {
  margin: .7rem 0 .55rem;
  font-weight: 900;
  line-height: .79;
  letter-spacing: -.055em;
  text-wrap: balance;
  text-shadow: 3px 3px 0 var(--ink), -1px -1px 0 var(--ink);
}

h1 span {
  display: block;
  color: var(--purple);
  font-size: clamp(2.75rem, 15vw, 4.8rem);
  letter-spacing: .01em;
  -webkit-text-stroke: 1px var(--green);
}

h1 strong {
  display: block;
  margin-top: .42rem;
  color: var(--purple);
  font-size: clamp(3.35rem, 19vw, 5.8rem);
  letter-spacing: .01em;
  -webkit-text-stroke: 1px var(--ink);
  filter: drop-shadow(4px 4px 0 var(--green));
}

.subtitle { color: var(--orange); }

.briefing {
  position: relative;
  margin-top: auto;
  padding: 1rem 1rem 1.05rem;
  border: 1px solid rgba(238,232,207,.32);
  background: rgba(7,8,7,.84);
  box-shadow: 8px 8px 0 rgba(190,43,184,.38);
  backdrop-filter: blur(5px);
}

.briefing::before {
  content: "";
  position: absolute;
  inset: 5px;
  border: 1px dashed rgba(140,231,130,.18);
  pointer-events: none;
}

.briefing-rule {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: .6rem;
  color: var(--green);
  font: 700 .66rem/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.briefing-rule span { height: 1px; background: currentColor; opacity: .48; }

.briefing > p {
  position: relative;
  margin: .85rem 0 0;
  color: rgba(238,232,207,.9);
  font: 500 .88rem/1.48 system-ui, sans-serif;
}

.warning {
  position: relative;
  display: flex;
  gap: .7rem;
  align-items: center;
  margin-top: .9rem;
  padding-top: .8rem;
  border-top: 1px solid rgba(255,123,45,.55);
}

.warning-mark {
  display: grid;
  place-items: center;
  width: 1.75rem;
  aspect-ratio: 1;
  flex: 0 0 auto;
  border: 2px solid var(--orange);
  color: var(--orange);
  font: 900 1.1rem/1 ui-monospace, monospace;
  transform: rotate(45deg);
}

.warning strong {
  display: block;
  color: var(--orange);
  font: 800 .72rem/1 system-ui, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.warning p {
  margin: .3rem 0 0;
  color: var(--paper);
  font: 600 .78rem/1.25 system-ui, sans-serif;
}

.action-zone { padding-top: 1.2rem; text-align: center; }

.start-button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .8rem;
  min-height: 3.55rem;
  border: 2px solid var(--ink);
  outline: 2px solid var(--green);
  outline-offset: 3px;
  background: var(--green);
  color: var(--ink);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: .15em;
  text-decoration: none;
  text-transform: uppercase;
  box-shadow: 7px 7px 0 var(--purple);
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}

.start-button:hover,
.start-button:focus-visible {
  background: var(--green-hot);
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 var(--purple);
}

.start-button:active {
  transform: translate(4px, 4px);
  box-shadow: 2px 2px 0 var(--purple);
}

.button-arrow { font-size: 1.5rem; line-height: 0; }

.action-zone p {
  margin: .85rem 0 0;
  color: rgba(238,232,207,.56);
  font: 500 .6rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}

@keyframes signal { 50% { opacity: .28; } }

@media (min-width: 40rem) {
  .mission-card { padding-inline: 1.5rem; }
}

@media (max-height: 42rem) {
  .title-lockup { padding-block: 1.4rem 1rem; }
  .briefing > p { font-size: .8rem; line-height: 1.36; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .signal-dot { animation: none; }
}