@font-face { font-family: "Signal Display"; src: url("assets/oswald.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "Signal Sans"; src: url("assets/dm-sans.ttf") format("truetype"); font-display: swap; }
@font-face { font-family: "Signal Mono"; src: url("assets/ibm-plex-mono.ttf") format("truetype"); font-display: swap; }

:root {
  --bg: #0b1022;
  --surface: #f1efe6;
  --ink: #131829;
  --muted: #626675;
  --accent: #ff6b35;
  --accent-ink: #16101a;
  --telemetry: #78d7dc;
  --dark-ink: #f2f0e9;
  --dark-muted: #a9aec1;
  --rule: rgba(19, 24, 41, 0.22);
  --dark-rule: rgba(242, 240, 233, 0.2);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; min-width: 320px; overflow-x: clip; color: var(--ink); background: var(--surface); font-family: "Signal Sans", Arial, sans-serif; font-size: 17px; line-height: 1.6; }
button, input, select { font: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }

.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; transform: translateY(-140%); min-height: 44px; padding: 10px 16px; background: var(--accent); color: var(--accent-ink); font-weight: 700; }
.skip-link:focus { transform: translateY(0); outline: 2px solid var(--dark-ink); outline-offset: 2px; }
.skip-link:active { transform: translateY(0) scale(.97); }

.site-header { position: absolute; z-index: 10; inset: 0 0 auto; height: 78px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding-inline: clamp(24px, 4vw, 64px); color: var(--dark-ink); border-bottom: 1px solid var(--dark-rule); }
.brand, .footer-mark { display: inline-flex; align-items: center; gap: 12px; font-family: "Signal Mono", monospace; font-size: 12px; font-weight: 600; letter-spacing: .13em; text-decoration: none; }
.brand { min-height: 44px; justify-self: start; }
.brand-mark { position: relative; width: 28px; height: 28px; border: 1px solid var(--telemetry); border-radius: 50%; }
.brand-mark::before, .brand-mark::after, .brand-mark i { content: ""; position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%); border: 1px solid var(--telemetry); border-radius: 50%; }
.brand-mark::before { width: 18px; height: 18px; }
.brand-mark::after { width: 6px; height: 6px; background: var(--accent); border-color: var(--accent); }
.brand-mark i { width: 1px; height: 34px; border: 0; border-left: 1px solid var(--telemetry); border-radius: 0; }
.header-nav { display: flex; align-items: center; gap: 30px; }
.header-nav a, .header-cta { min-height: 44px; display: inline-flex; align-items: center; font-family: "Signal Mono", monospace; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; text-decoration: none; }
.header-cta { justify-self: end; gap: 12px; color: var(--accent); font-weight: 600; }

.hero { position: relative; min-height: 880px; height: min(1000px, 100svh); overflow: hidden; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(420px, .92fr); align-items: center; gap: 40px; padding: 128px clamp(24px, 6vw, 88px) 74px; color: var(--dark-ink); background: var(--bg); isolation: isolate; }
.hero::before { content: ""; position: absolute; z-index: -3; width: 68vw; height: 68vw; right: -28vw; top: -22vw; border-radius: 50%; background: radial-gradient(circle at center, rgba(120, 215, 220, .13), rgba(120, 215, 220, 0) 66%); }
.hero::after { content: ""; position: absolute; z-index: -2; inset: 0; background: radial-gradient(circle at 18% 78%, rgba(255, 107, 53, .12) 0 1px, transparent 2px), radial-gradient(circle at 74% 18%, rgba(242,240,233,.28) 0 1px, transparent 2px), radial-gradient(circle at 85% 72%, rgba(120,215,220,.25) 0 1px, transparent 2px); background-size: 173px 173px, 223px 223px, 281px 281px; }
.hero-grid { position: absolute; z-index: -2; inset: 78px 0 0; opacity: .24; background-image: linear-gradient(var(--dark-rule) 1px, transparent 1px), linear-gradient(90deg, var(--dark-rule) 1px, transparent 1px); background-size: 76px 76px; mask-image: linear-gradient(90deg, transparent, black 20%, black 80%, transparent); }
.vertical-note { position: absolute; left: 20px; top: 50%; margin: 0; transform: translate(-50%, -50%) rotate(-90deg); color: var(--dark-muted); font: 500 10px/1 "Signal Mono", monospace; letter-spacing: .16em; }
.hero-copy { position: relative; z-index: 2; align-self: center; padding-left: clamp(0px, 3vw, 48px); animation: signal-in .7s var(--ease) both; }
.eyebrow, .section-index { margin: 0 0 24px; font: 600 12px/1.3 "Signal Mono", monospace; letter-spacing: .13em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--telemetry); }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 5px rgba(255,107,53,.14); animation: pulse 2.2s ease-in-out infinite; }
h1 { margin: 0; font-family: "Signal Display", Impact, sans-serif; font-size: clamp(118px, 13.2vw, 206px); font-weight: 600; line-height: .75; letter-spacing: -.04em; text-transform: uppercase; }
h1 span { display: block; }
h1 span:last-child { color: transparent; -webkit-text-stroke: 2px var(--dark-ink); margin-left: clamp(28px, 5vw, 76px); }
.hero-intro { max-width: 540px; margin: 44px 0 28px; color: #c7cad5; font-size: clamp(17px, 1.4vw, 20px); line-height: 1.6; }
.primary-action { min-height: 52px; display: inline-flex; align-items: center; justify-content: space-between; gap: 32px; padding: 13px 20px; color: var(--accent-ink); background: var(--accent); font-weight: 700; text-decoration: none; transition: transform 180ms var(--ease), background-color 180ms var(--ease); }

.receiver { position: relative; z-index: 1; justify-self: center; width: min(41vw, 520px); aspect-ratio: 1; display: grid; place-items: center; animation: receiver-settle .9s .12s var(--ease) both; }
.orbit { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; fill: none; stroke: rgba(242,240,233,.28); stroke-width: 1; }
.orbit-dash { stroke: var(--telemetry); stroke-dasharray: 2 12; opacity: .6; }
.orbit-outer { animation: orbit-turn 40s linear infinite; }
.receiver-core { position: relative; z-index: 2; width: 49%; aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid var(--dark-rule); border-radius: 50%; background: rgba(11,16,34,.82); box-shadow: 0 0 0 12px rgba(11,16,34,.45), inset 0 0 50px rgba(120,215,220,.08); text-align: center; }
.receiver-label, .receiver-core span:last-child { font: 500 10px/1.4 "Signal Mono", monospace; color: var(--dark-muted); text-transform: uppercase; letter-spacing: .11em; }
.receiver-core strong { width: 82%; overflow: hidden; margin: 6px 0; color: var(--accent); font: 600 clamp(30px, 4vw, 54px)/1 "Signal Display", sans-serif; letter-spacing: -.03em; text-overflow: ellipsis; white-space: nowrap; }
.orbit-node { position: absolute; z-index: 3; width: 54px; height: 54px; display: grid; place-items: center; border: 1px solid var(--telemetry); border-radius: 50%; background: var(--bg); color: var(--telemetry); font: 600 13px/1 "Signal Mono", monospace; }
.node-one { left: 5%; top: 24%; }
.node-two { right: 2%; bottom: 21%; border-color: var(--accent); color: var(--accent); }
.sweep { position: absolute; z-index: 1; left: 50%; top: 50%; width: 47%; height: 1px; transform-origin: left center; background: linear-gradient(90deg, var(--accent), transparent); animation: sweep 8s linear infinite; }
.hero-date { position: absolute; right: clamp(24px, 6vw, 88px); bottom: 50px; display: grid; grid-template-columns: auto auto; column-gap: 16px; align-items: end; font-family: "Signal Mono", monospace; }
.hero-date strong { grid-row: 1 / 3; grid-column: 2; color: var(--dark-ink); font: 500 clamp(42px, 6vw, 84px)/.85 "Signal Display", sans-serif; letter-spacing: -.03em; }
.hero-date .month, .hero-date .year { color: var(--dark-muted); font-size: 10px; letter-spacing: .14em; }
.hero-coordinate { position: absolute; left: clamp(24px, 6vw, 88px); bottom: 36px; margin: 0; color: var(--dark-muted); font: 500 10px/1.2 "Signal Mono", monospace; letter-spacing: .12em; }

.browse { padding: 112px clamp(24px, 6vw, 88px) 144px; background: var(--surface); }
.browse-heading { display: grid; grid-template-columns: 1.15fr .85fr; align-items: end; gap: 64px; max-width: 1280px; margin: 0 auto 64px; }
.section-index { color: var(--muted); }
h2 { margin: 0; font-family: "Signal Display", Impact, sans-serif; font-size: clamp(60px, 8vw, 118px); font-weight: 500; line-height: .95; letter-spacing: -.035em; text-transform: uppercase; }
.browse-heading > p { max-width: 560px; margin: 0 0 6px; color: var(--muted); font-size: 18px; }
.control-panel { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 1.25fr .75fr .55fr; border: 1px solid var(--ink); }
.field { min-width: 0; padding: 16px 20px 19px; border-right: 1px solid var(--ink); }
.field label { display: block; margin-bottom: 7px; color: var(--muted); font: 600 11px/1.3 "Signal Mono", monospace; letter-spacing: .1em; text-transform: uppercase; }
.input-wrap, .select-wrap { display: flex; align-items: center; gap: 12px; }
.input-wrap > span { font-size: 24px; line-height: 1; }
.input-wrap input, .select-wrap select { width: 100%; min-height: 44px; border: 0; border-radius: 0; outline: 2px solid transparent; outline-offset: 3px; color: var(--ink); background: transparent; font-size: 17px; }
.input-wrap input::placeholder { color: #777a84; }
.select-wrap select { appearance: none; cursor: pointer; }
.select-wrap > span { pointer-events: none; }
.saved-toggle { min-height: 88px; display: flex; align-items: center; gap: 13px; padding: 16px 20px; border: 0; border-radius: 0; background: transparent; cursor: pointer; text-align: left; transition: color 180ms var(--ease), background-color 180ms var(--ease), transform 180ms var(--ease); }
.saved-toggle .saved-icon { width: 32px; height: 32px; display: grid; place-items: center; border: 1px solid var(--ink); border-radius: 50%; }
.saved-toggle strong, .saved-toggle small { display: block; }
.saved-toggle strong { font-size: 14px; }
.saved-toggle small { color: var(--muted); font: 500 11px/1.4 "Signal Mono", monospace; }
.saved-toggle[aria-pressed="true"] { color: var(--accent-ink); background: var(--accent); }
.saved-toggle[aria-pressed="true"] small { color: var(--accent-ink); }
.results-bar { max-width: 1280px; min-height: 64px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--ink); }
.results-bar p { margin: 0; font: 600 12px/1.4 "Signal Mono", monospace; letter-spacing: .08em; text-transform: uppercase; }
.clear-button { min-height: 44px; padding: 8px 2px; border: 0; border-bottom: 1px solid var(--ink); background: transparent; cursor: pointer; font: 600 12px/1 "Signal Mono", monospace; text-transform: uppercase; }

.event-list { max-width: 1280px; margin: 0 auto; }
.event-row { position: relative; display: grid; grid-template-columns: 48px 150px minmax(0, 1fr) 150px 96px; align-items: center; gap: 24px; min-height: 142px; border-bottom: 1px solid var(--rule); transition: background-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease); }
.event-row::before { content: ""; position: absolute; inset: 0 -16px; z-index: 0; background: var(--ink); opacity: 0; transform: scaleY(.88); transition: opacity 180ms var(--ease), transform 180ms var(--ease); }
.event-row > * { position: relative; z-index: 1; }
.event-number { align-self: start; padding-top: 25px; color: var(--muted); font: 500 11px/1 "Signal Mono", monospace; }
.event-time span, .event-time small { display: block; color: var(--muted); font: 500 10px/1.4 "Signal Mono", monospace; letter-spacing: .08em; }
.event-time strong { display: block; margin: 6px 0 2px; font: 500 22px/1.1 "Signal Display", sans-serif; }
.category { color: var(--accent); font: 600 11px/1.3 "Signal Mono", monospace; letter-spacing: .11em; text-transform: uppercase; }
.event-main h3 { max-width: 700px; margin: 8px 0 4px; font-size: clamp(22px, 2vw, 30px); line-height: 1.15; letter-spacing: -.02em; }
.event-main p { margin: 0; color: var(--muted); font-size: 14px; }
.event-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.event-meta span { padding: 4px 7px; border: 1px solid var(--rule); font: 500 10px/1.2 "Signal Mono", monospace; text-transform: uppercase; }
.open-item { min-height: 48px; padding: 10px 0; border: 0; border-bottom: 1px solid var(--ink); background: transparent; cursor: pointer; font: 600 12px/1 "Signal Mono", monospace; text-transform: uppercase; transition: color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease); }
.open-item span { margin-left: 8px; }
.empty-state { max-width: 1280px; margin: 48px auto 0; padding: 72px 24px; border: 1px dashed var(--muted); text-align: center; }
.empty-glyph { display: block; color: var(--accent); font: 500 80px/1 "Signal Display", sans-serif; }
.empty-state h3 { margin: 18px 0 8px; font-size: 30px; }
.empty-state p { margin: 0 auto 24px; max-width: 520px; color: var(--muted); }
.empty-state button { min-height: 48px; padding: 12px 22px; border: 1px solid var(--ink); background: var(--ink); color: var(--dark-ink); cursor: pointer; font-weight: 700; transition: transform 180ms var(--ease), background-color 180ms var(--ease); }

.guide { position: relative; overflow: hidden; display: grid; grid-template-columns: minmax(300px, .9fr) minmax(450px, 1.1fr); gap: 96px; padding: 144px clamp(24px, 8vw, 116px); color: var(--dark-ink); background: var(--bg); }
.guide::after { content: "03—04"; position: absolute; right: -2vw; bottom: -6vw; color: rgba(242,240,233,.035); font: 600 26vw/.8 "Signal Display", sans-serif; letter-spacing: -.05em; pointer-events: none; }
.guide .section-index { color: var(--telemetry); }
.guide h2 { font-size: clamp(62px, 7vw, 104px); }
.guide-steps { position: relative; z-index: 1; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--dark-rule); }
.guide-steps li { display: grid; grid-template-columns: 70px 1fr; gap: 20px; padding: 28px 0; border-bottom: 1px solid var(--dark-rule); transition: padding-left 180ms var(--ease), border-color 180ms var(--ease); }
.guide-steps > li > span { color: var(--accent); font: 500 12px/1.5 "Signal Mono", monospace; }
.guide-steps h3 { margin: 0 0 4px; font-size: 24px; }
.guide-steps p { max-width: 540px; margin: 0; color: var(--dark-muted); }
.guide-action { position: absolute; left: clamp(24px, 8vw, 116px); bottom: 102px; min-height: 48px; display: inline-flex; align-items: center; gap: 24px; color: var(--accent); font: 600 12px/1 "Signal Mono", monospace; letter-spacing: .06em; text-transform: uppercase; text-decoration: none; border-bottom: 1px solid var(--accent); }

footer { min-height: 112px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; padding-inline: clamp(24px, 6vw, 88px); color: var(--dark-ink); background: #070b18; border-top: 1px solid var(--dark-rule); }
footer p { margin: 0; color: var(--dark-muted); font-size: 13px; text-align: center; }
footer a { justify-self: end; min-height: 44px; display: inline-flex; align-items: center; gap: 12px; font: 500 11px/1 "Signal Mono", monospace; text-transform: uppercase; text-decoration: none; }

.detail-dialog { width: min(1100px, calc(100% - 48px)); max-height: calc(100dvh - 48px); padding: 0; border: 0; color: var(--dark-ink); background: transparent; overflow: visible; }
.detail-dialog::backdrop { background: rgba(3, 6, 15, .82); backdrop-filter: blur(8px); }
.detail-shell { max-height: calc(100dvh - 48px); overflow-y: auto; border: 1px solid rgba(242,240,233,.28); background: var(--bg); box-shadow: 0 20px 90px rgba(0,0,0,.5); }
.detail-header { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 12px 24px; border-bottom: 1px solid var(--dark-rule); }
.detail-header > div { display: flex; gap: 20px; font: 500 10px/1.4 "Signal Mono", monospace; letter-spacing: .1em; }
.detail-kicker { color: var(--telemetry); }
.detail-header > div span:last-child { color: var(--dark-muted); }
.close-detail { min-height: 44px; min-width: 92px; padding: 8px 0; border: 0; border-bottom: 1px solid var(--dark-ink); color: var(--dark-ink); background: transparent; cursor: pointer; font: 600 11px/1 "Signal Mono", monospace; text-transform: uppercase; transition: color 180ms var(--ease), border-color 180ms var(--ease), transform 180ms var(--ease); }
.close-detail span { margin-left: 12px; font-size: 20px; }
.detail-content { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); min-height: 560px; }
.detail-main { padding: 64px clamp(32px, 6vw, 80px) 56px; border-right: 1px solid var(--dark-rule); }
.detail-category { color: var(--accent); font: 600 11px/1 "Signal Mono", monospace; letter-spacing: .13em; text-transform: uppercase; }
.detail-main h2 { max-width: 800px; margin: 20px 0 36px; font-size: clamp(58px, 7.5vw, 108px); text-transform: none; }
.detail-body { max-width: 62ch; color: #c9ccd8; }
.detail-body p { margin: 0 0 18px; }
.save-item { min-height: 52px; margin-top: 24px; display: inline-flex; align-items: center; gap: 12px; padding: 12px 20px; border: 1px solid var(--accent); color: var(--accent); background: transparent; cursor: pointer; font-weight: 700; transition: color 180ms var(--ease), background-color 180ms var(--ease), transform 180ms var(--ease); }
.save-symbol { width: 26px; height: 26px; display: grid; place-items: center; border: 1px solid currentColor; border-radius: 50%; }
.save-item[aria-pressed="true"] { color: var(--accent-ink); background: var(--accent); }
.detail-facts { margin: 0; padding: 38px 32px; background: #10162a; }
.detail-facts div { padding: 16px 0; border-bottom: 1px solid var(--dark-rule); }
.detail-facts dt { color: var(--dark-muted); font: 500 10px/1.4 "Signal Mono", monospace; letter-spacing: .1em; text-transform: uppercase; }
.detail-facts dd { margin: 7px 0 0; font-size: 17px; font-weight: 600; }
.detail-frequency { height: 46px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; padding: 0 24px; border-top: 1px solid var(--dark-rule); color: var(--dark-muted); font: 500 9px/1 "Signal Mono", monospace; }
.detail-frequency i { height: 8px; background: repeating-linear-gradient(90deg, var(--dark-rule) 0 1px, transparent 1px 10px); }

.brand:focus, .header-nav a:focus, .header-cta:focus, .primary-action:focus, .guide-action:focus, footer a:focus { outline: 2px solid var(--accent); outline-offset: 4px; }
.input-wrap input:focus, .select-wrap select:focus { outline-color: var(--accent); }
.saved-toggle:focus, .clear-button:focus, .open-item:focus, .empty-state button:focus, .close-detail:focus, .save-item:focus { outline: 2px solid var(--accent); outline-offset: 3px; }
.event-row:focus-within { box-shadow: inset 4px 0 var(--accent); }
.brand:focus-visible, .header-nav a:focus-visible, .header-cta:focus-visible, .primary-action:focus-visible, .guide-action:focus-visible, footer a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.input-wrap input:focus-visible, .select-wrap select:focus-visible { outline-color: var(--accent); }
.saved-toggle:focus-visible, .clear-button:focus-visible, .open-item:focus-visible, .empty-state button:focus-visible, .close-detail:focus-visible, .save-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.brand:active, .header-nav a:active, .header-cta:active, .primary-action:active, .guide-action:active, footer a:active { transform: scale(.97); }
.saved-toggle:active, .clear-button:active, .open-item:active, .empty-state button:active, .close-detail:active, .save-item:active { transform: scale(.97); }

@keyframes signal-in { from { opacity: 0; transform: translateX(-28px); } to { opacity: 1; transform: translateX(0); } }
@keyframes receiver-settle { from { opacity: 0; transform: scale(.88) rotate(-7deg); } to { opacity: 1; transform: scale(1) rotate(0); } }
@keyframes orbit-turn { to { transform: rotate(360deg); } }
@keyframes sweep { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 4px rgba(255,107,53,.12); } 50% { box-shadow: 0 0 0 9px rgba(255,107,53,.02); } }

@media (hover: hover) and (pointer: fine) {
  .brand:hover { color: var(--telemetry); }
  .header-nav a:hover { color: var(--telemetry); }
  .header-cta:hover { color: var(--dark-ink); }
  .primary-action:hover { transform: translateY(-2px); background: #ff8158; }
  .saved-toggle:hover { background: rgba(19,24,41,.08); }
  .saved-toggle[aria-pressed="true"]:hover { background: #ff8158; }
  .clear-button:hover { color: var(--accent); border-color: var(--accent); }
  .event-row:hover::before { opacity: 1; transform: scaleY(1); }
  .event-row:hover { color: var(--dark-ink); }
  .event-row:hover .event-main p, .event-row:hover .event-time span, .event-row:hover .event-time small, .event-row:hover .event-number { color: var(--dark-muted); }
  .event-row:hover .event-meta span { border-color: var(--dark-rule); }
  .event-row:hover .open-item { color: var(--accent); border-color: var(--accent); transform: translateX(-4px); }
  .empty-state button:hover { background: var(--accent); color: var(--accent-ink); }
  .guide-steps li:hover { padding-left: 10px; border-color: var(--telemetry); }
  .guide-action:hover { color: var(--dark-ink); border-color: var(--dark-ink); }
  footer a:hover { color: var(--accent); }
  .close-detail:hover { color: var(--accent); border-color: var(--accent); }
  .save-item:hover { color: var(--accent-ink); background: var(--accent); transform: translateY(-2px); }
}

@media (max-width: 980px) {
  .hero { height: auto; min-height: 930px; grid-template-columns: 1fr; align-content: center; gap: 24px; padding-top: 126px; }
  .hero-copy { padding-left: 24px; }
  h1 { font-size: clamp(108px, 20vw, 164px); }
  .receiver { position: absolute; right: -10vw; top: 180px; width: 58vw; opacity: .46; }
  .hero-copy { max-width: 720px; }
  .hero-intro { position: relative; z-index: 2; max-width: 470px; }
  .hero-date { right: 24px; }
  .browse-heading { grid-template-columns: 1fr; gap: 24px; }
  .control-panel { grid-template-columns: 1fr 1fr; }
  .filter-field { border-right: 0; }
  .saved-toggle { grid-column: 1 / -1; border-top: 1px solid var(--ink); }
  .event-row { grid-template-columns: 38px 125px minmax(0, 1fr) 90px; gap: 16px; }
  .event-meta { display: none; }
  .guide { grid-template-columns: 1fr; gap: 64px; padding-bottom: 116px; }
  .guide-action { position: static; justify-self: start; }
  footer { grid-template-columns: 1fr auto; }
  footer p { display: none; }
  .detail-content { grid-template-columns: 1fr; }
  .detail-main { border-right: 0; }
  .detail-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-header { position: absolute; height: 70px; grid-template-columns: 1fr auto; padding-inline: 20px; }
  .header-nav { position: absolute; top: 70px; left: 0; right: 0; overflow-x: auto; display: flex; gap: 24px; padding: 0 20px; border-bottom: 1px solid var(--dark-rule); background: rgba(11,16,34,.92); scrollbar-width: none; }
  .header-nav a { flex: 0 0 auto; min-height: 46px; }
  .header-cta { min-width: 84px; }
  .hero { min-height: 844px; padding: 148px 20px 92px; align-content: start; }
  .hero-grid { inset-block-start: 116px; background-size: 54px 54px; }
  .vertical-note { display: none; }
  .hero-copy { padding: 0; }
  .eyebrow { max-width: 240px; margin-bottom: 30px; font-size: 10px; }
  h1 { font-size: clamp(96px, 29vw, 112px); line-height: .79; }
  h1 span:last-child { margin-left: 12px; -webkit-text-stroke-width: 1px; }
  .hero-intro { max-width: 330px; margin-block: 36px 22px; font-size: 16px; }
  .primary-action { width: 100%; max-width: 350px; }
  .receiver { width: 300px; right: -128px; top: 170px; opacity: .42; }
  .receiver-core strong { font-size: 34px; }
  .orbit-node { width: 42px; height: 42px; }
  .hero-date { right: 20px; bottom: 30px; }
  .hero-date strong { font-size: 50px; }
  .hero-coordinate { left: 20px; bottom: 30px; width: 90px; }

  .browse { padding: 80px 20px 96px; }
  .browse-heading { margin-bottom: 40px; }
  .browse-heading > p { font-size: 16px; }
  h2 { font-size: clamp(54px, 17vw, 74px); }
  .control-panel { grid-template-columns: 1fr; }
  .field { border-right: 0; border-bottom: 1px solid var(--ink); }
  .saved-toggle { grid-column: auto; border-top: 0; }
  .results-bar { min-height: 58px; }
  .event-row { grid-template-columns: 34px minmax(0, 1fr) 54px; gap: 10px; min-height: 154px; padding-block: 18px; }
  .event-row::before { inset-inline: -8px; }
  .event-number { grid-column: 1; grid-row: 1 / 3; padding-top: 8px; }
  .event-time { grid-column: 2; grid-row: 1; display: flex; align-items: center; gap: 12px; }
  .event-time strong { margin: 0; font-size: 18px; }
  .event-time small { display: none; }
  .event-main { grid-column: 2; grid-row: 2; }
  .event-main h3 { margin-top: 5px; font-size: 22px; }
  .event-main p { font-size: 13px; }
  .open-item { grid-column: 3; grid-row: 1 / 3; min-width: 48px; font-size: 0; }
  .open-item span { margin: 0; font-size: 18px; }
  .empty-state { padding-block: 52px; }

  .guide { padding: 96px 20px 88px; gap: 48px; }
  .guide h2 { font-size: clamp(56px, 17vw, 76px); }
  .guide-steps li { grid-template-columns: 44px 1fr; gap: 12px; }
  .guide-steps p { font-size: 15px; }
  footer { min-height: 104px; padding-inline: 20px; }
  footer .footer-mark { font-size: 10px; }

  .detail-dialog { width: 100%; max-width: none; max-height: 100dvh; margin: 0; }
  .detail-shell { max-height: 100dvh; min-height: 100dvh; border: 0; }
  .detail-header { position: sticky; z-index: 3; top: 0; min-height: 66px; padding-inline: 20px; background: var(--bg); }
  .detail-header > div span:last-child { display: none; }
  .detail-content { min-height: 0; }
  .detail-main { padding: 44px 20px 36px; }
  .detail-main h2 { margin-block: 16px 28px; font-size: clamp(52px, 17vw, 72px); }
  .save-item { width: 100%; justify-content: center; }
  .detail-facts { grid-template-columns: 1fr 1fr; padding: 24px 20px; gap: 0 18px; }
  .detail-facts dd { font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}