/* SCOPE — layout concept: a specification sheet on black.
   Identity: FAA aviation obstruction marking — aviation orange and white.
   Wordmark: S COP E, the middle three letters orange, revealing the COP inside SCOPE.
   Deliberately single-theme. The design commits to black, so there is no light variant. */

:root {
  color-scheme: dark;

  --bg:         #000000;
  --surface:    #0C0B0A;
  --surface-2:  #17120F;
  --ink:        #F6F2EF;
  --ink-soft:   #9C928B;
  --line:       #2B2521;
  --line-soft:  #1A1613;

  --orange:     #FF6A13;
  --orange-hi:  #FF9254;
  --orange-tint:#1E0E04;
  --on-orange:  #140A03;
  --marking:    #FFFFFF;

  --ok:         #46B98A;
  --warn:       #D9A33A;
  --flag:       #E35F49;

  --display: "IBM Plex Sans Condensed", "Helvetica Neue", Arial, sans-serif;
  --body:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --measure: 64ch;
  --gut-l: max(18px, env(safe-area-inset-left, 0px));
  --gut-r: max(18px, env(safe-area-inset-right, 0px));
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding-left: var(--gut-l);
  padding-right: var(--gut-r);
}

a { color: var(--orange-hi); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--orange); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--orange); outline-offset: 2px; }

h1, h2, h3 {
  font-family: var(--display); font-weight: 700; text-wrap: balance;
  margin: 0; letter-spacing: -0.012em;
}
h1 { font-size: clamp(2.1rem, 5.3vw, 3.75rem); line-height: 1.03; }
h2 { font-size: clamp(1.5rem, 3vw, 2.15rem); line-height: 1.1; }
h3 { font-size: 1.0625rem; line-height: 1.3; font-weight: 600; }
p  { margin: 0; max-width: var(--measure); }

.eyebrow {
  font-family: var(--mono); font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--orange); margin: 0;
}

/* obstruction marking — the tower's own livery, orange against white */
.marking {
  height: 7px;
  background: repeating-linear-gradient(
    90deg,
    var(--orange) 0 28px,
    var(--marking) 28px 56px
  );
}

/* ---------- masthead ---------- */

.mast { background: var(--surface); border-bottom: 1px solid var(--line); }
.mast .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding-block: 15px; flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 11px; text-decoration: none; color: var(--ink); }

/* the wordmark: S COP E */
.brand .mark {
  font-family: var(--display); font-weight: 700; font-size: 1.5rem;
  letter-spacing: normal; color: var(--marking); line-height: 1;
}
.brand .mark .cop { color: var(--orange); }

.brand .sub {
  font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-soft);
}
.mast nav { display: flex; gap: 20px; font-size: 0.875rem; }
.mast nav a { color: var(--ink-soft); text-decoration: none; }
.mast nav a:hover { color: var(--orange); }

/* ---------- hero ---------- */

.hero { border-bottom: 1px solid var(--line); }
.hero .wrap { padding-block: clamp(40px, 7vw, 78px); }
.hero-grid {
  display: grid; gap: clamp(32px, 5vw, 58px);
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: start;
}
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; } }

.hero h1 { margin-top: 15px; }
.hero h1 em { font-style: normal; color: var(--orange); }
.hero .lede { margin-top: 20px; font-size: 1.0625rem; color: var(--ink-soft); }
.hero .lede strong { color: var(--ink); font-weight: 500; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; align-items: center; }
.btn {
  display: inline-block; font: 500 0.9375rem/1 var(--body);
  padding: 13px 20px; border-radius: 1px; text-decoration: none;
  border: 1px solid var(--orange); background: var(--orange); color: var(--on-orange);
}
.btn:hover { background: var(--orange-hi); border-color: var(--orange-hi); color: var(--on-orange); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--orange); color: var(--orange); background: transparent; }

/* ---------- the close-out package, as content-graphic ---------- */

.pkg { background: var(--surface); border: 1px solid var(--line); padding: 20px; min-width: 0; }
.pkg-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px; flex-wrap: wrap; padding-bottom: 13px; border-bottom: 2px solid var(--orange);
}
.pkg-head strong { font-family: var(--display); font-size: 1.0625rem; letter-spacing: 0.02em; }
.pkg-head .id { font-family: var(--mono); font-size: 0.75rem; color: var(--ink-soft); }
.pkg-head .id b { color: var(--ink); font-weight: 500; }
.pkg-sect { padding-top: 17px; }
.pkg-sect + .pkg-sect { margin-top: 17px; border-top: 1px solid var(--line-soft); }
.pkg-sect h4 {
  margin: 0 0 11px; font-family: var(--mono); font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft);
  display: flex; justify-content: space-between; gap: 10px;
}
.pkg-sect h4 em { font-style: normal; color: var(--ink); font-variant-numeric: tabular-nums; }
.cells { display: grid; grid-template-columns: repeat(9, 1fr); gap: 5px; }
.cells i {
  display: block; aspect-ratio: 1; border-radius: 1px;
  background: var(--surface-2); border: 1px solid var(--line);
}
.cells i.done { background: var(--orange); border-color: var(--orange); }
.cells i.flag { background: var(--flag); border-color: var(--flag); }
.cells i.wait { background: transparent; border-color: var(--line); border-style: dashed; }
.legend {
  display: flex; gap: 15px; flex-wrap: wrap; margin-top: 17px; padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono); font-size: 0.6875rem; color: var(--ink-soft);
}
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend b { width: 9px; height: 9px; border-radius: 1px; display: inline-block; }

/* ---------- bands ---------- */

section.band { border-bottom: 1px solid var(--line); }
section.band .wrap { padding-block: clamp(40px, 6vw, 70px); }
section.band.on-white { background: var(--surface); }
.band-head { max-width: var(--measure); }
.band-head h2 { margin-top: 11px; }
.band-head p { margin-top: 14px; color: var(--ink-soft); }

.probs { display: grid; gap: 1px; margin-top: 34px; background: var(--line); border: 1px solid var(--line); }
.probs > div { background: var(--bg); padding: 22px; min-width: 0; }
@media (min-width: 760px) { .probs { grid-template-columns: repeat(3, 1fr); } }
.probs h3 { margin-bottom: 8px; }
.probs p { color: var(--ink-soft); font-size: 0.9375rem; }

/* the sequence is a genuine process order, so it is numbered */
ol.steps {
  list-style: none; padding: 0; margin-top: 34px;
  display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line);
}
ol.steps > li {
  background: var(--bg); padding: 22px; display: grid; gap: 16px; min-width: 0;
  grid-template-columns: auto minmax(0, 1fr); align-items: start;
}
.steps .n {
  font-family: var(--mono); font-size: 0.8125rem; font-weight: 500; color: var(--on-orange);
  background: var(--orange); width: 27px; height: 27px; display: grid; place-items: center;
  font-variant-numeric: tabular-nums;
}
.steps h3 { margin-bottom: 7px; }
.steps p { color: var(--ink-soft); font-size: 0.9375rem; }
.term { font-family: var(--mono); font-size: 0.8125em; color: var(--orange-hi); white-space: nowrap; }

.feats { margin-top: 34px; border-top: 2px solid var(--orange); }
.feats > div { display: grid; gap: 6px 28px; padding-block: 21px; border-bottom: 1px solid var(--line-soft); }
@media (min-width: 760px) { .feats > div { grid-template-columns: 15rem minmax(0, 1fr); gap: 28px; } }
.feats p { color: var(--ink-soft); font-size: 0.9375rem; }

.roles { display: grid; gap: 1px; margin-top: 34px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 820px) { .roles { grid-template-columns: repeat(3, 1fr); } }
.roles > div { background: var(--bg); padding: 22px; min-width: 0; }
.roles .plat {
  font-family: var(--mono); font-size: 0.625rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--orange); display: block; margin-bottom: 11px;
}
.roles ul { margin: 12px 0 0; padding-left: 18px; color: var(--ink-soft); font-size: 0.9375rem; }
.roles li + li { margin-top: 4px; }

.note {
  margin-top: 34px; padding: 22px; background: var(--orange-tint);
  border: 1px solid var(--line); border-left: 3px solid var(--orange);
}
.note p { font-size: 0.9375rem; }
.note p + p { margin-top: 10px; color: var(--ink-soft); }

.addr { margin-top: 26px; display: grid; gap: 18px; }
@media (min-width: 700px) { .addr { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 780px; } }
.addr dl {
  margin: 0; display: grid; grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: 9px 14px; font-size: 0.9375rem;
}
.addr dt {
  font-family: var(--mono); font-size: 0.6875rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-soft); padding-top: 4px;
}
.addr dd { margin: 0; min-width: 0; overflow-wrap: break-word; }
.addr dd.sel { font-family: var(--mono); font-size: 0.875rem; user-select: all; }

footer { background: var(--surface); border-top: 1px solid var(--line); }
footer .wrap {
  padding-block: 28px; display: flex; justify-content: space-between;
  gap: 16px 28px; flex-wrap: wrap; font-size: 0.8125rem; color: var(--ink-soft);
}
footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--ink-soft); }
footer a:hover { color: var(--orange); }

/* ---------- legal pages ---------- */

.doc .wrap { padding-block: clamp(36px, 5vw, 58px); max-width: 790px; }
.doc h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); }
.doc .stamp { margin-top: 15px; font-family: var(--mono); font-size: 0.75rem; color: var(--ink-soft); }
.doc h2 { font-size: 1.1875rem; margin-top: 40px; padding-top: 18px; border-top: 2px solid var(--orange); }
.doc h3 { margin-top: 25px; }
.doc p, .doc li { font-size: 0.9375rem; }
.doc p { margin-top: 12px; color: var(--ink-soft); }
.doc p strong { color: var(--ink); font-weight: 500; }
.doc ul { margin: 12px 0 0; padding-left: 20px; }
.doc li { margin-top: 7px; color: var(--ink-soft); }
.doc li strong { color: var(--ink); font-weight: 500; }
.doc .tbl { overflow-x: auto; margin-top: 17px; border: 1px solid var(--line); }
.doc table { width: 100%; border-collapse: collapse; font-size: 0.875rem; min-width: 480px; }
.doc th, .doc td {
  text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line-soft);
  vertical-align: top; color: var(--ink-soft);
}
.doc td strong { color: var(--ink); font-weight: 500; }
.doc th {
  background: var(--orange-tint); font-family: var(--mono); font-size: 0.6875rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--orange);
}
.doc tr:last-child td { border-bottom: 0; }
.doc .callout {
  margin-top: 20px; padding: 18px; background: var(--orange-tint);
  border: 1px solid var(--line); border-left: 3px solid var(--orange); font-size: 0.9375rem;
}
.doc .callout p { margin-top: 12px; }
.doc .callout p:first-child { margin-top: 0; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }