/* ==========================================================================
   ASTEROID WATCH — orient-luxury design system
   Near-black base, gold accent stack, grain overlay, parchment light mode.
   Garnet accent reserved solely for hazard indication.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@500;600;700&family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400&family=Syne:wght@500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ol-font-display: 'Cinzel', serif;
  --ol-font-body: 'Cormorant Garamond', serif;
  --ol-font-ui: 'Syne', sans-serif;
  --ol-font-mono: 'IBM Plex Mono', monospace;

  --ol-radius: 2px;
  --ol-border-w: 1px;
  --ol-max-width: 1180px;
  --ol-space-1: 0.4rem;
  --ol-space-2: 0.8rem;
  --ol-space-3: 1.6rem;
  --ol-space-4: 2.4rem;
  --ol-space-5: 4rem;

  --ol-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ol-dur: 420ms;
}

:root,
html[data-theme="dark"] {
  --ol-bg: #09080b;
  --ol-bg-elevated: #121016;
  --ol-bg-card: #15131a;
  --ol-hairline: rgba(201, 168, 76, 0.18);

  --ol-gold-100: #c9a84c;
  --ol-gold-80: rgba(201, 168, 76, 0.8);
  --ol-gold-60: rgba(201, 168, 76, 0.6);
  --ol-gold-40: rgba(201, 168, 76, 0.4);
  --ol-gold-20: rgba(201, 168, 76, 0.16);
  --ol-gold-dark: #8a6820;

  --ol-alert-100: #a83e3e;
  --ol-alert-60: rgba(168, 62, 62, 0.6);
  --ol-alert-20: rgba(168, 62, 62, 0.16);

  --ol-text: #ede7da;
  --ol-text-dim: rgba(237, 231, 218, 0.66);
  --ol-text-faint: rgba(237, 231, 218, 0.4);

  --ol-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.7);
  --ol-grain-opacity: 0.05;
  --ol-scrim: rgba(9, 8, 11, 0.88);
  --ol-orbit-line: rgba(201, 168, 76, 0.3);
}

html[data-theme="light"] {
  --ol-bg: #f0ebe0;
  --ol-bg-elevated: #f2ede8;
  --ol-bg-card: #fbf8f2;
  --ol-hairline: rgba(138, 104, 32, 0.28);

  --ol-gold-100: #8a6820;
  --ol-gold-80: rgba(138, 104, 32, 0.85);
  --ol-gold-60: rgba(138, 104, 32, 0.6);
  --ol-gold-40: rgba(138, 104, 32, 0.35);
  --ol-gold-20: rgba(138, 104, 32, 0.14);
  --ol-gold-dark: #6b4f18;

  --ol-alert-100: #8c3131;
  --ol-alert-60: rgba(140, 49, 49, 0.55);
  --ol-alert-20: rgba(140, 49, 49, 0.12);

  --ol-text: #211c14;
  --ol-text-dim: rgba(33, 28, 20, 0.68);
  --ol-text-faint: rgba(33, 28, 20, 0.46);

  --ol-shadow: 0 24px 60px -24px rgba(90, 70, 30, 0.28);
  --ol-grain-opacity: 0.035;
  --ol-scrim: rgba(240, 235, 224, 0.92);
  --ol-orbit-line: rgba(138, 104, 32, 0.35);
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--ol-bg);
  color: var(--ol-text);
  font-family: var(--ol-font-body);
  font-size: 18px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--ol-dur) var(--ol-ease), color var(--ol-dur) var(--ol-ease);
  min-height: 100vh;
}
a { color: var(--ol-gold-100); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3 { font-family: var(--ol-font-display); font-weight: 600; margin: 0; letter-spacing: 0.02em; }

/* ---------- Grain overlay ---------- */
.grain-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  mix-blend-mode: soft-light;
  opacity: var(--ol-grain-opacity);
}

/* ---------- Layout shell ---------- */
.shell { max-width: var(--ol-max-width); margin: 0 auto; padding: 0 var(--ol-space-3); }

/* ---------- Header ---------- */
.site-header {
  border-bottom: var(--ol-border-w) solid var(--ol-hairline);
  background: linear-gradient(180deg, var(--ol-bg-elevated), transparent);
}
.site-header .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--ol-space-3);
  padding-bottom: var(--ol-space-3);
  gap: var(--ol-space-2);
}
.wordmark { display: flex; flex-direction: column; gap: 2px; }
.wordmark .mark { font-family: var(--ol-font-display); font-size: 1.5rem; letter-spacing: 0.14em; color: var(--ol-text); }
.wordmark .tagline { font-family: var(--ol-font-ui); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ol-gold-100); }
.icon-btn {
  width: 40px; height: 40px; border-radius: 50%;
  border: var(--ol-border-w) solid var(--ol-hairline);
  background: var(--ol-bg-card);
  color: var(--ol-gold-100);
  display: flex; align-items: center; justify-content: center;
  transition: border-color 200ms var(--ol-ease), transform 200ms var(--ol-ease);
}
.icon-btn:hover { border-color: var(--ol-gold-60); transform: translateY(-1px); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn .icon-moon { display: block; }
.icon-btn .icon-sun { display: none; }
html[data-theme="light"] .icon-btn .icon-moon { display: none; }
html[data-theme="light"] .icon-btn .icon-sun { display: block; }

/* ---------- Mission brief ---------- */
.mission-brief {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--ol-border-w);
  background: var(--ol-hairline);
  border: var(--ol-border-w) solid var(--ol-hairline);
  border-radius: var(--ol-radius);
  margin-top: var(--ol-space-4);
  overflow: hidden;
}
.brief-cell {
  background: var(--ol-bg-card);
  padding: var(--ol-space-2) var(--ol-space-3);
}
.brief-cell .brief-label {
  font-family: var(--ol-font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ol-text-faint);
  margin-bottom: 0.3rem;
}
.brief-cell .brief-value {
  font-family: var(--ol-font-mono);
  font-size: 1.15rem;
  color: var(--ol-text);
}
.brief-cell.is-alert .brief-value { color: var(--ol-alert-100); }
@media (max-width: 700px) {
  .mission-brief { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Orbital timeline nav (signature element) ---------- */
.orbital-nav {
  display: flex;
  align-items: center;
  gap: var(--ol-space-2);
  padding: var(--ol-space-4) 0 var(--ol-space-2);
}
.orbit-arrow {
  flex-shrink: 0;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: var(--ol-border-w) solid var(--ol-hairline);
  background: var(--ol-bg-card);
  color: var(--ol-text);
  display: flex; align-items: center; justify-content: center;
  transition: border-color 200ms var(--ol-ease);
}
.orbit-arrow:hover { border-color: var(--ol-gold-60); }
.orbit-track {
  flex: 1;
  position: relative;
}
.orbit-track svg { width: 100%; height: 110px; display: block; overflow: visible; }
.orbit-path { fill: none; stroke: var(--ol-orbit-line); stroke-width: 1; stroke-dasharray: 2 5; }
.orbit-node-group { cursor: pointer; }
.orbit-node-halo {
  fill: var(--ol-gold-20);
  opacity: 0;
  transition: opacity 240ms var(--ol-ease), r 240ms var(--ol-ease);
}
.orbit-node {
  fill: var(--ol-bg-card);
  stroke: var(--ol-gold-60);
  stroke-width: 1.4;
  transition: fill 220ms var(--ol-ease), stroke 220ms var(--ol-ease), r 220ms var(--ol-ease);
}
.orbit-node.is-hazard { stroke: var(--ol-alert-60); }
.orbit-node-group:hover .orbit-node { stroke: var(--ol-gold-100); }
.orbit-node-group.is-active .orbit-node { fill: var(--ol-gold-100); stroke: var(--ol-gold-100); }
.orbit-node-group.is-active .orbit-node.is-hazard { fill: var(--ol-alert-100); stroke: var(--ol-alert-100); }
.orbit-node-group.is-active .orbit-node-halo { opacity: 1; }
.orbit-day-label {
  font-family: var(--ol-font-mono);
  font-size: 10.5px;
  fill: var(--ol-text-faint);
  text-anchor: middle;
}
.orbit-node-group.is-active .orbit-day-label { fill: var(--ol-gold-100); }
.orbit-count-label {
  font-family: var(--ol-font-ui);
  font-size: 9px;
  fill: var(--ol-text);
  text-anchor: middle;
  font-weight: 600;
}

/* ---------- Results meta ---------- */
.results-meta {
  font-family: var(--ol-font-mono);
  font-size: 0.78rem;
  color: var(--ol-text-faint);
  padding: var(--ol-space-2) 0;
  border-top: var(--ol-border-w) solid var(--ol-hairline);
  margin-bottom: var(--ol-space-2);
}

/* ---------- Asteroid list ---------- */
.asteroid-list { display: flex; flex-direction: column; gap: var(--ol-space-2); padding-bottom: var(--ol-space-5); }
.asteroid-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ol-space-3);
  background: var(--ol-bg-card);
  border: var(--ol-border-w) solid var(--ol-hairline);
  border-left: 3px solid var(--ol-gold-40);
  border-radius: var(--ol-radius);
  padding: var(--ol-space-2) var(--ol-space-3);
  cursor: pointer;
  transition: border-color 200ms var(--ol-ease), transform 200ms var(--ol-ease);
}
.asteroid-card:hover { border-color: var(--ol-gold-60); transform: translateX(2px); }
.asteroid-card.is-hazard { border-left-color: var(--ol-alert-100); }
.asteroid-card .ac-main { min-width: 0; }
.asteroid-card .ac-name {
  font-family: var(--ol-font-ui);
  font-size: 1rem;
  color: var(--ol-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.asteroid-card .ac-sub {
  font-family: var(--ol-font-mono);
  font-size: 0.76rem;
  color: var(--ol-text-faint);
  margin-top: 0.2rem;
}
.asteroid-card .ac-metrics {
  display: flex;
  gap: var(--ol-space-3);
  flex-shrink: 0;
}
.ac-metric { text-align: right; }
.ac-metric .m-label {
  font-family: var(--ol-font-ui);
  font-size: 0.56rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-text-faint);
}
.ac-metric .m-value {
  font-family: var(--ol-font-mono);
  font-size: 0.88rem;
  color: var(--ol-text);
}
.hazard-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--ol-font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-alert-100);
}
.hazard-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--ol-alert-100); }

@media (max-width: 640px) {
  .asteroid-card { flex-direction: column; align-items: flex-start; }
  .asteroid-card .ac-metrics { width: 100%; justify-content: space-between; }
}

/* ---------- Skeletons ---------- */
.card-skeleton {
  height: 74px;
  border-radius: var(--ol-radius);
  border: var(--ol-border-w) solid var(--ol-hairline);
  background: linear-gradient(110deg, var(--ol-bg-card) 8%, var(--ol-bg-elevated) 18%, var(--ol-bg-card) 33%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ---------- Empty state ---------- */
.empty-state { text-align: center; padding: var(--ol-space-5) var(--ol-space-3); color: var(--ol-text-dim); }
.empty-state h3 { color: var(--ol-gold-100); margin-bottom: var(--ol-space-1); font-size: 1.3rem; }
.empty-state p { font-size: 1.05rem; }

/* ---------- Lightbox / detail panel ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 998;
  background: var(--ol-scrim);
  backdrop-filter: blur(6px);
  display: none; align-items: center; justify-content: center;
  padding: var(--ol-space-3);
  overflow-y: auto;
}
.lightbox.is-open { display: flex; }
.lightbox-panel {
  max-width: 560px;
  width: 100%;
  background: var(--ol-bg-card);
  border: var(--ol-border-w) solid var(--ol-hairline);
  border-radius: var(--ol-radius);
  box-shadow: var(--ol-shadow);
  padding: var(--ol-space-3);
  position: relative;
  max-height: 88vh;
  overflow-y: auto;
}
.lightbox-close {
  position: absolute; top: var(--ol-space-2); right: var(--ol-space-2);
  width: 32px; height: 32px; border-radius: 50%;
  border: var(--ol-border-w) solid var(--ol-hairline);
  background: var(--ol-bg-elevated);
  color: var(--ol-text);
  display: flex; align-items: center; justify-content: center;
}
.lightbox-close:hover { border-color: var(--ol-gold-60); }
.ticket-id { font-family: var(--ol-font-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--ol-gold-100); margin-bottom: var(--ol-space-1); }
.ticket-title { font-size: 1.4rem; margin-bottom: var(--ol-space-1); padding-right: var(--ol-space-3); }
.ticket-hazard-banner {
  display: none;
  align-items: center;
  gap: 8px;
  font-family: var(--ol-font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-alert-100);
  background: var(--ol-alert-20);
  border: var(--ol-border-w) solid var(--ol-alert-60);
  border-radius: var(--ol-radius);
  padding: 0.5rem 0.8rem;
  margin-bottom: var(--ol-space-2);
}
.ticket-hazard-banner.is-visible { display: flex; }
.ticket-log { border-top: var(--ol-border-w) solid var(--ol-hairline); margin-top: var(--ol-space-2); }
.log-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 0.55rem 0;
  border-bottom: var(--ol-border-w) dashed var(--ol-hairline);
  gap: var(--ol-space-2);
}
.log-row:last-child { border-bottom: none; }
.log-row .log-label { font-family: var(--ol-font-ui); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ol-text-faint); white-space: nowrap; }
.log-row .log-value { font-family: var(--ol-font-mono); font-size: 0.85rem; color: var(--ol-text); text-align: right; }
.jpl-link { margin-top: var(--ol-space-3); display: inline-block; font-family: var(--ol-font-ui); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; border: var(--ol-border-w) solid var(--ol-gold-40); color: var(--ol-gold-100); border-radius: 999px; padding: 0.55rem 1.2rem; }
.jpl-link:hover { background: var(--ol-gold-20); text-decoration: none; }

/* ---------- Footer ---------- */
.site-footer { border-top: var(--ol-border-w) solid var(--ol-hairline); padding: var(--ol-space-3) 0 var(--ol-space-5); }
.site-footer .shell { display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--ol-space-2); font-family: var(--ol-font-ui); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ol-text-faint); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: var(--ol-space-3); left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 1000;
  background: var(--ol-bg-card);
  border: var(--ol-border-w) solid var(--ol-gold-40);
  color: var(--ol-text);
  font-family: var(--ol-font-ui);
  font-size: 0.82rem;
  padding: 0.8rem 1.4rem;
  border-radius: var(--ol-radius);
  box-shadow: var(--ol-shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 260ms var(--ol-ease), transform 260ms var(--ol-ease);
  max-width: 90vw;
}
.toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Focus & motion ---------- */
a:focus-visible, button:focus-visible { outline: 2px solid var(--ol-gold-100); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

@media (max-width: 520px) {
  body { font-size: 16.5px; }
  .wordmark .mark { font-size: 1.25rem; }
}