/* Mars Image Atlas. Dayside (light) and nightside (dark, as THEMIS sees it in infrared). */
:root {
  --font-head: 'Supreme', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Erode', Georgia, 'Times New Roman', serif;
  --font-mono: ui-monospace, 'Cascadia Code', Consolas, monospace;

  --paper: #f2ebe1;   /* settled dust */
  --card: #fbf7f1;
  --ink: #241a14;     /* basalt */
  --muted: #66564a;
  --line: #ddcfbe;
  --accent: #a63f17;  /* iron oxide */
  --on-accent: #ffffff;
  --cool: #2c6669;
  --shadow: 0 1px 0 rgba(36, 26, 20, .06), 0 8px 24px -16px rgba(36, 26, 20, .35);

  /* Ironbow thermal ramp, the one decorative motif. */
  --t0: #140a26; --t1: #4a1268; --t2: #9c2560; --t3: #db5a2b; --t4: #f3b13c; --t5: #fbefb0;

  --c-themis-vis: #b4501d; --c-themis-ir: #8a2a66; --c-hirise: #2c6669; --c-ctx: #5d4b3f;

  --radius: 10px; --radius-s: 6px;
  --measure: 66ch;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #120e0c; --card: #1c1613; --ink: #f1e7dc; --muted: #b6a596; --line: #34291f;
    --accent: #f08a4a; --on-accent: #1b0e06; --cool: #7fc4c3;
    --shadow: 0 1px 0 rgba(0, 0, 0, .4), 0 10px 30px -18px rgba(0, 0, 0, .8);
    --c-themis-vis: #f39a5c; --c-themis-ir: #e07bb8; --c-hirise: #7fc4c3; --c-ctx: #cbb8a6;
  }
}
:root[data-theme="dark"] {
  --paper: #120e0c; --card: #1c1613; --ink: #f1e7dc; --muted: #b6a596; --line: #34291f;
  --accent: #f08a4a; --on-accent: #1b0e06; --cool: #7fc4c3;
  --shadow: 0 1px 0 rgba(0, 0, 0, .4), 0 10px 30px -18px rgba(0, 0, 0, .8);
  --c-themis-vis: #f39a5c; --c-themis-ir: #e07bb8; --c-hirise: #7fc4c3; --c-ctx: #cbb8a6;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.65 var(--font-body); overflow-wrap: break-word; }
img { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
code, pre { font-family: var(--font-mono); font-size: .86em; }
code { background: color-mix(in srgb, var(--ink) 7%, transparent); padding: .1em .35em; border-radius: 4px; overflow-wrap: anywhere; }
h1, h2, h3 { font-family: var(--font-head); font-weight: 700; letter-spacing: -0.015em; line-height: 1.1; margin: 0 0 .5em; }
h1 { font-size: clamp(32px, 5.6vw, 52px); max-width: 18ch; letter-spacing: -0.025em; }
h2 { font-size: clamp(23px, 3.2vw, 30px); margin-top: 1.8em; }
h3 { font-size: 19px; margin-top: 1.4em; }
p, li { max-width: var(--measure); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--card); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
.muted { color: var(--muted); }
.eyebrow { font: 500 13px/1 var(--font-head); text-transform: uppercase; letter-spacing: .14em; color: var(--accent); margin: 0 0 14px; }
.lede { font-size: 19px; line-height: 1.6; color: var(--muted); }
.sub { color: var(--muted); margin-top: -.3em; }

/* Header */
.site-head { border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--paper) 92%, transparent); position: sticky; top: 0; z-index: 1000; backdrop-filter: blur(6px); }
.head-in { max-width: 1160px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.wordmark { display: flex; align-items: center; gap: 10px; font: 700 18px/1 var(--font-head); color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.mark { width: 30px; height: 30px; }
.site-head nav { display: flex; gap: 4px 16px; flex-wrap: wrap; margin-left: auto; }
.site-head nav a { font: 500 15px/1.2 var(--font-head); color: var(--ink); text-decoration: none; padding: 6px 0; border-bottom: 2px solid transparent; }
.site-head nav a:hover, .site-head nav a[aria-current] { border-bottom-color: var(--accent); }
.theme { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 999px; width: 36px; height: 36px; display: grid; place-items: center; cursor: pointer; }
.i { width: 1.1em; height: 1.1em; vertical-align: -.18em; flex: none; }
.i-sun { display: none; }
:root[data-theme="dark"] .i-sun { display: inline; } :root[data-theme="dark"] .i-moon { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .i-sun { display: inline; } :root:not([data-theme="light"]) .i-moon { display: none; } }

main { max-width: 1160px; margin: 0 auto; padding: 40px 16px 64px; }
@media (max-width: 720px) {
  .head-in { gap: 8px 12px; }
  .site-head nav { order: 3; width: 100%; margin: 0; gap: 2px 14px; }
  .site-head nav a { font-size: 14px; }
  .theme { margin-left: auto; }
  main { padding-top: 28px; }
}

/* Buttons and forms */
.btn { display: inline-flex; align-items: center; gap: 8px; font: 500 15px/1 var(--font-head); background: var(--accent); color: var(--on-accent); border: 0; border-radius: var(--radius-s); padding: 13px 18px; text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.07); }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.search { display: flex; gap: 8px; margin: 22px 0 10px; max-width: 640px; }
.combo { position: relative; flex: 1; display: flex; align-items: center; }
.combo > .i { position: absolute; left: 13px; color: var(--muted); pointer-events: none; }
.combo input { width: 100%; font: 400 17px/1.2 var(--font-body); color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-s); padding: 13px 12px 13px 40px; }
.combo input:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
.combo-list { position: absolute; top: calc(100% + 4px); left: 0; right: 0; margin: 0; padding: 4px; list-style: none; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-s); box-shadow: var(--shadow); z-index: 1100; max-height: 320px; overflow: auto; }
.combo-list li { padding: 8px 10px; border-radius: 4px; cursor: pointer; display: flex; justify-content: space-between; gap: 12px; max-width: none; }
.combo-list li[aria-selected="true"], .combo-list li:hover { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.combo-list .t { color: var(--muted); font-size: 14px; white-space: nowrap; }
.try { color: var(--muted); font-size: 15px; }
@media (max-width: 520px) { .search { flex-direction: column; } .search .btn { justify-content: center; } }

/* Home hero */
.hero { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero { grid-template-columns: minmax(0, 1fr); gap: 28px; } }
.strips { margin: 0; }
.strip-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding: 14px; border-radius: var(--radius); background: linear-gradient(135deg, var(--t0), var(--t1) 30%, var(--t2) 55%, var(--t3) 80%, var(--t4)); }
.strip { display: flex; flex-direction: column; gap: 6px; text-decoration: none; color: #fff; font: 500 12px/1.2 var(--font-head); }
.strip img { width: 100%; aspect-ratio: 1 / 2; object-fit: cover; border-radius: 4px; background: rgba(0, 0, 0, .35); display: block; }
.strips figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; line-height: 1.45; }

/* Cards */
.cards3 { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 800px) { .cards3 { grid-template-columns: 1fr; } }
.door, .pcard, .icard { display: flex; flex-direction: column; gap: 6px; height: 100%; padding: 20px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); text-decoration: none; box-shadow: var(--shadow); max-width: none; }
.door:hover, .pcard:hover, .icard:hover { border-color: var(--accent); }
.door .i { width: 26px; height: 26px; color: var(--accent); }
.door b, .icard b { font: 700 19px/1.2 var(--font-head); }
.door span, .pwhy, .icard span { color: var(--muted); font-size: 16px; line-height: 1.5; }
.pgrid { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.pgrid li, .cards3 li, .inst-list li { max-width: none; }
.ptype { font: 500 12px/1 var(--font-head); text-transform: uppercase; letter-spacing: .1em; color: var(--accent); }
.pname { font: 700 21px/1.15 var(--font-head); }
.theme-h { font-size: 15px; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin: 28px 0 10px; }
.inst-list { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.icard .meta { font-size: 14px; }
.handoff { margin-top: 56px; padding: 28px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); border-left: 6px solid var(--accent); }
.handoff h2 { margin-top: 0; }

/* Instrument tags */
.itag { display: inline-flex; align-items: center; gap: 6px; font: 500 13px/1 var(--font-head); color: var(--ink); white-space: nowrap; }
.itag .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c, var(--muted)); }
.itag-themis-vis { --c: var(--c-themis-vis); } .itag-themis-ir { --c: var(--c-themis-ir); } .itag-hirise { --c: var(--c-hirise); } .itag-ctx { --c: var(--c-ctx); }

/* Facts, steps, notes, tables */
.facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px 24px; margin: 20px 0 28px; padding: 18px 20px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.facts div { min-width: 0; }
.facts dt { font: 500 12px/1 var(--font-head); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-bottom: 6px; }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.steps { padding-left: 0; list-style: none; counter-reset: s; }
.steps li { counter-increment: s; position: relative; padding: 6px 0 6px 42px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 5px; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font: 700 14px/1 var(--font-head); color: var(--on-accent); background: var(--accent); }
.note { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--muted); background: color-mix(in srgb, var(--cool) 9%, transparent); border-radius: var(--radius-s); padding: 12px 14px; }
.note .i { color: var(--cool); margin-top: 3px; }
.plain { padding-left: 1.1em; } .plain li { margin: 6px 0; }
.tbl { border-collapse: collapse; width: 100%; max-width: 760px; font-size: 16px; display: block; overflow-x: auto; }
.tbl th, .tbl td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { font: 500 13px/1.2 var(--font-head); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.copyable { margin: 14px 0; border: 1px solid var(--line); border-radius: var(--radius-s); background: var(--card); max-width: 760px; }
.copyable figcaption { display: flex; justify-content: space-between; align-items: center; padding: 6px 8px 6px 12px; border-bottom: 1px solid var(--line); font: 500 13px/1 var(--font-head); color: var(--muted); }
.copyable pre { margin: 0; padding: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.copy { display: inline-flex; gap: 6px; align-items: center; font: 500 13px/1 var(--font-head); color: var(--ink); background: none; border: 1px solid var(--line); border-radius: 4px; padding: 6px 9px; cursor: pointer; }
.copy.done { color: var(--cool); border-color: var(--cool); }

/* Tabs */
.tabs [role="tablist"] { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.tabs [role="tab"] { font: 500 15px/1 var(--font-head); background: none; border: 0; border-bottom: 3px solid transparent; color: var(--muted); padding: 10px 6px; cursor: pointer; }
.tabs [role="tab"][aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }

/* Map */
.mapcard { margin: 18px 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--card); }
.map { height: 420px; background: var(--t0); }
@media (max-width: 600px) { .map { height: 300px; } }
.mapcard figcaption { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 9px 12px; font-size: 14px; color: var(--muted); }
.toggle { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.leaflet-container { font: 400 13px/1.4 var(--font-body); background: var(--t0); }
.leaflet-container a { color: var(--accent); }
.leaflet-control-attribution { font-size: 11px; max-width: 70%; }

/* Finder results */
.finder-head h2 { margin-top: 1.2em; }
.finder-filter { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 4px; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); cursor: pointer; }
.chip input { accent-color: var(--accent); margin: 0; }
.loading { color: var(--muted); font-style: italic; }
.err { color: var(--accent); }
.isec { margin-top: 30px; }
.isec-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.isec-head h3 { margin: 0; }
.count { font: 700 26px/1 var(--font-head); letter-spacing: -0.02em; }
.count small { font: 400 15px/1 var(--font-body); color: var(--muted); }
.igrid { list-style: none; padding: 0; margin: 14px 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.igrid li { max-width: none; }
.icard2 { display: flex; flex-direction: column; height: 100%; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-s); overflow: hidden; color: var(--ink); text-decoration: none; }
.icard2:hover { border-color: var(--accent); }
.icard2 .thumb { aspect-ratio: 1 / 1.3; background: var(--t0); overflow: hidden; }
.icard2 img { width: 100%; height: 100%; object-fit: cover; display: block; }
.icard2 .cap { padding: 8px 10px 10px; display: flex; flex-direction: column; gap: 2px; font-size: 14px; line-height: 1.35; }
.icard2 .id { font-family: var(--font-mono); font-size: 11.5px; overflow-wrap: anywhere; color: var(--muted); }
.icard2 b { font: 500 14px/1.2 var(--font-head); }
.more { font: 500 14px/1 var(--font-head); }
.boxline { font-size: 14px; color: var(--muted); }

/* Image page */
.image-grid { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 36px; align-items: start; }
@media (max-width: 820px) { .image-grid { grid-template-columns: 1fr; } }
.preview { margin: 0; background: var(--t0); border-radius: var(--radius); overflow: hidden; }
.preview img { display: block; width: 100%; height: auto; max-height: 720px; object-fit: contain; }
.preview figcaption { padding: 8px 12px; font-size: 13px; color: #e9ddd0; background: var(--t0); }
.files { list-style: none; padding: 0; }
.files li { display: flex; gap: 10px; align-items: baseline; padding: 7px 0; border-bottom: 1px solid var(--line); max-width: none; flex-wrap: wrap; }
.files .ftype { font: 500 12px/1 var(--font-head); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); min-width: 64px; }
.files a { font-family: var(--font-mono); font-size: 13.5px; overflow-wrap: anywhere; }
.idrow { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.idrow code { font-size: 17px; padding: 6px 10px; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); }
.foot-in { max-width: 1160px; margin: 0 auto; padding: 24px 16px 40px; font-size: 14px; color: var(--muted); }
.foot-in p { max-width: 90ch; }
.disclaimer { font-weight: 500; color: var(--ink); }

@media (prefers-reduced-motion: no-preference) {
  .door, .pcard, .icard, .icard2 { transition: border-color .2s ease, transform .2s ease; }
  .door:hover, .pcard:hover, .icard:hover, .icard2:hover { transform: translateY(-2px); }
  .igrid li { animation: rise .25s ease both; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
}