/* ============================================================
   ORBIT-ATLAS — shared design system
   Dunkel-kosmisch · große Schrift · geschichtete Didaktik
   (erweitert das Trend-Tracker-Farbschema)
   ============================================================ */
:root{
  --bg:#070b16; --bg2:#0b1020; --panel:#0e1426; --panel2:#111a30;
  --line:#1d2740; --line2:#2a3a5c;
  --ink:#EAEEF9; --ink2:#D6DCEC; --mut:#9AA6C7;
  --amber:#E89A2A; --gold:#F2C66D; --gold-soft:#f6d79a;
  --blue:#7FA6E0; --green:#5FC49A; --red:#E0787E; --violet:#B79BE6; --teal:#63C8D6;
  --sun:#FFCC55;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(1100px 640px at 74% -12%, #14264a 0%, rgba(20,38,74,0) 55%),
    radial-gradient(900px 500px at 8% 8%, #16143a 0%, rgba(22,20,58,0) 45%),
    var(--bg);
  color:var(--ink);
  font:18px/1.72 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
/* faint starfield */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:
    radial-gradient(1.4px 1.4px at 20% 30%, #fff 50%, transparent),
    radial-gradient(1.2px 1.2px at 65% 12%, #cfe0ff 50%, transparent),
    radial-gradient(1.5px 1.5px at 82% 62%, #fff 50%, transparent),
    radial-gradient(1px 1px at 42% 78%, #ffe6b0 50%, transparent),
    radial-gradient(1.1px 1.1px at 9% 66%, #fff 50%, transparent),
    radial-gradient(1.2px 1.2px at 90% 25%, #dfe9ff 50%, transparent);
  background-repeat:no-repeat;
}
.wrap{max-width:940px;margin:0 auto;padding:0 22px 100px}

/* ---------- top chapter navigation ---------- */
.topnav{position:sticky;top:0;z-index:40;background:rgba(7,11,22,.82);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topnav .inner{max-width:940px;margin:0 auto;padding:10px 22px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.topnav .brand{font-weight:800;letter-spacing:.02em;color:var(--gold);font-size:15px;white-space:nowrap}
.topnav .brand .star{color:var(--amber)}
.topnav nav{display:flex;gap:4px;flex-wrap:wrap;font-size:13.5px}
.topnav nav a{color:var(--mut);text-decoration:none;padding:4px 9px;border-radius:8px;border:1px solid transparent}
.topnav nav a:hover{color:var(--ink);background:var(--panel)}
.topnav nav a.here{color:var(--gold);border-color:rgba(242,198,109,.35);background:rgba(242,198,109,.07)}

/* ---------- typography ---------- */
.kicker{color:var(--amber);font-weight:700;letter-spacing:.15em;text-transform:uppercase;font-size:13px}
h1{font-size:clamp(30px,5vw,50px);line-height:1.1;margin:.32em 0 .28em;letter-spacing:-.015em;font-weight:800}
h2{font-size:clamp(23px,3.4vw,32px);margin:2.2em 0 .55em;padding-top:.5em;border-top:1px solid var(--line);font-weight:750}
h3{font-size:21px;margin:1.7em 0 .45em;color:var(--gold)}
h4{font-size:17px;margin:1.3em 0 .35em;color:var(--gold-soft);letter-spacing:.02em}
p{color:var(--ink2)}
a{color:var(--gold);text-decoration:none;border-bottom:1px solid rgba(242,198,109,.35)}
a:hover{border-bottom-color:var(--gold)}
strong,b{color:#F3F6FF}
.lede{font-size:clamp(19px,2.3vw,23px);line-height:1.6;color:#CDD5EB;max-width:40ch;max-width:74ch;font-weight:400}
.meta{color:var(--mut);font-size:14px;margin-top:14px}
.meta b{color:var(--ink)}
ul,ol{padding-left:22px}
li{margin:7px 0;color:var(--ink2)}
em,i{color:#E7ECFA}
hr{border:none;border-top:1px solid var(--line);margin:2.4em 0}

/* ---------- hero image ---------- */
figure{margin:22px 0}
.hero{margin:14px 0 8px;border-radius:18px;overflow:hidden;border:1px solid var(--line);
  box-shadow:0 20px 60px rgba(0,0,0,.5)}
.hero img{display:block;width:100%;height:auto}
figure img{display:block;width:100%;height:auto;border-radius:14px;border:1px solid var(--line);box-shadow:0 14px 40px rgba(0,0,0,.42)}
figcaption{color:var(--mut);font-size:13.5px;margin-top:9px;line-height:1.5;text-align:center}

/* ---------- "In einem Satz" summary ---------- */
.tldr{background:linear-gradient(180deg,rgba(232,154,42,.10),rgba(232,154,42,.03));
  border:1px solid rgba(232,154,42,.34);border-radius:14px;padding:16px 20px;margin:22px 0;font-size:18.5px;line-height:1.6}
.tldr b{color:var(--gold)}
.tldr .lbl{display:block;color:var(--amber);font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;margin-bottom:5px}

/* ---------- Alltags-Analogie (everyday analogy) ---------- */
.analogy{position:relative;background:rgba(127,166,224,.08);border:1px solid rgba(127,166,224,.34);
  border-radius:14px;padding:16px 20px 16px 54px;margin:20px 0}
.analogy::before{content:"💡";position:absolute;left:16px;top:15px;font-size:22px}
.analogy .lbl{color:var(--blue);font-weight:700;font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;display:block;margin-bottom:3px}
.analogy p{margin:.2em 0;color:#DCE4F5}

/* ---------- geschichtete Didaktik: "Für Profis" ---------- */
details.pro{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--violet);
  border-radius:12px;margin:18px 0;overflow:hidden}
details.pro>summary{cursor:pointer;list-style:none;padding:13px 18px;font-weight:700;color:var(--violet);
  font-size:14.5px;display:flex;align-items:center;gap:9px;user-select:none}
details.pro>summary::-webkit-details-marker{display:none}
details.pro>summary::before{content:"▸";color:var(--violet);transition:transform .18s;font-size:13px}
details.pro[open]>summary::before{transform:rotate(90deg)}
details.pro>summary .h{color:var(--mut);font-weight:600;font-size:12.5px;letter-spacing:.04em}
details.pro .body{padding:2px 18px 16px;font-size:15.5px;line-height:1.66;color:#CCD5EA;border-top:1px solid var(--line)}
details.pro .body p:first-child{margin-top:12px}
details.pro .body :is(h4){color:var(--violet)}

/* ---------- cards & grid ---------- */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0}
.grid.three{grid-template-columns:1fr 1fr 1fr}
@media(max-width:780px){.grid,.grid.three{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.card h3,.card h4{margin-top:0}
.tag{display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.04em;padding:3px 10px;border-radius:999px;margin-bottom:9px}
.tag.g{background:rgba(95,196,154,.14);color:var(--green);border:1px solid rgba(95,196,154,.32)}
.tag.b{background:rgba(127,166,224,.14);color:#9bb6e6;border:1px solid rgba(127,166,224,.32)}
.tag.a{background:rgba(232,154,42,.14);color:var(--gold);border:1px solid rgba(232,154,42,.32)}
.tag.r{background:rgba(224,120,126,.14);color:var(--red);border:1px solid rgba(224,120,126,.32)}

/* ---------- quotes ---------- */
blockquote{margin:16px 0;padding:13px 20px;border-left:3px solid var(--amber);
  background:linear-gradient(90deg,rgba(232,154,42,.09),transparent);border-radius:0 10px 10px 0;color:#E7ECFA;font-size:17px}
blockquote .src{display:block;margin-top:7px;color:var(--mut);font-size:13px;font-style:normal}

/* ---------- callouts ---------- */
.callout{background:rgba(224,120,126,.08);border:1px solid rgba(224,120,126,.32);border-radius:12px;padding:15px 20px;margin:20px 0}
.callout.amber{background:rgba(232,154,42,.07);border-color:rgba(232,154,42,.32)}
.callout.blue{background:rgba(127,166,224,.08);border-color:rgba(127,166,224,.30)}
.callout.green{background:rgba(95,196,154,.08);border-color:rgba(95,196,154,.30)}
.callout h3,.callout h4{margin-top:0;color:var(--red);font-size:16px}
.callout.amber :is(h3,h4){color:var(--amber)}
.callout.blue :is(h3,h4){color:#9bb6e6}
.callout.green :is(h3,h4){color:var(--green)}
.callout p:last-child{margin-bottom:0}

/* ---------- tables ---------- */
.tbl-scroll{overflow-x:auto;margin:16px 0}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:440px}
th,td{text-align:left;padding:10px 13px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--amber);font-size:12.5px;text-transform:uppercase;letter-spacing:.06em;font-weight:700}
td .s{color:var(--mut);font-size:12.5px}
.num{font-variant-numeric:tabular-nums;font-weight:700;color:var(--gold)}

/* ---------- data-figure (SVG) ---------- */
.datafig{background:linear-gradient(180deg,#070c18,#0a1120);border:1px solid var(--line);
  border-radius:16px;padding:20px 20px 14px;margin:24px 0;box-shadow:inset 0 1px 0 rgba(255,255,255,.03)}
.datafig .t{font-weight:750;font-size:16px;color:var(--ink);margin:0 0 2px}
.datafig .st{color:var(--mut);font-size:13px;margin:0 0 12px}
.datafig svg{display:block;max-width:100%;height:auto}
.datafig .cap{color:var(--mut);font-size:13px;margin-top:10px;line-height:1.5}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:10px;font-size:12.5px;color:var(--mut)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:11px;height:11px;border-radius:3px;display:inline-block}

/* ---------- pills / chips ---------- */
.pill{display:inline-block;background:var(--bg2);border:1px solid var(--line);border-radius:8px;padding:2px 9px;font-size:12.5px;color:var(--mut)}

/* ---------- prev/next chapter footer ---------- */
.chapnav{display:flex;gap:14px;justify-content:space-between;margin:46px 0 0;flex-wrap:wrap}
.chapnav a{flex:1 1 240px;display:block;background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:15px 18px;text-decoration:none;border-bottom:1px solid var(--line)}
.chapnav a:hover{border-color:rgba(242,198,109,.4);background:var(--panel2)}
.chapnav .dir{color:var(--mut);font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.chapnav .ti{color:var(--gold);font-weight:700;font-size:16px;margin-top:3px;display:block}
.chapnav a.next{text-align:right}

.foot{margin-top:44px;padding-top:18px;border-top:1px solid var(--line);color:var(--mut);font-size:13.5px;line-height:1.6}

/* interactive svg helpers */
.hot{cursor:pointer;transition:opacity .15s}
.hot:hover{opacity:.85}
[data-tip]{cursor:help}