/* KI-Agenten – verspielter Roboter-Look, barrierearm
   Zwei Themen: body.thema-lern (hell, freundlich) · body.thema-glas (dunkles Labor) */
:root {
  --bg: linear-gradient(160deg, #e9f2ff 0%, #fff4ea 100%);
  --punkte: rgba(61,123,253,.10);
  --glas: rgba(255,255,255,.75); --glas-rand: rgba(255,255,255,.95);
  --text: #1a2340; --leise: #4b5675; --akzent: #3d7bfd; --akzent2: #ff8a5b; --akzent-text: #fff;
  --kind: linear-gradient(135deg, #3d7bfd, #6a5bff); --ki-bg: #fff; --ki-rand: #dbe4f5;
  --gedanke: #7a4fd6; --werkzeug: #0b8a5f; --fehler: #c0362c; --fokus: #ffb000;
  --radius: 22px; --schatten: 0 10px 30px rgba(40,60,120,.13);
}
body.thema-glas {
  --bg: radial-gradient(circle at 20% 0%, #23306b 0%, transparent 55%), radial-gradient(circle at 100% 100%, #4a1f63 0%, transparent 50%), #0c1226;
  --punkte: rgba(139,233,255,.10);
  --glas: rgba(20,30,62,.72); --glas-rand: rgba(139,233,255,.28);
  --text: #eaf3ff; --leise: #a9b8d8; --akzent: #8be9ff; --akzent2: #ff5ec4; --akzent-text: #0c1226;
  --kind: linear-gradient(135deg, #ff5ec4, #8a5bff); --ki-bg: rgba(255,255,255,.06); --ki-rand: rgba(139,233,255,.3);
  --gedanke: #d3b4ff; --werkzeug: #7cf29a; --fehler: #ff8a80;
  --schatten: 0 10px 40px rgba(0,0,0,.45);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
html { background: #0c1226; }
body {
  font: 17px/1.55 "Nunito", "Segoe UI Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text); background: var(--bg); background-attachment: fixed; min-height: 100vh;
}
body::before { /* feines Punkteraster wie Platinen-Muster */
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: -1;
  background-image: radial-gradient(var(--punkte) 1.5px, transparent 1.5px); background-size: 22px 22px;
}
.huelle { max-width: 880px; margin: 0 auto; padding: 16px; min-height: 100vh; display: flex; flex-direction: column; gap: 14px; }
.glas {
  background: var(--glas); border: 1.5px solid var(--glas-rand); border-radius: var(--radius);
  box-shadow: var(--schatten); backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
}
a { color: var(--akzent); }
h1, h2 { letter-spacing: -.01em; }

button, select, input, textarea { font: inherit; color: inherit; }
button {
  background: var(--akzent); color: var(--akzent-text); border: 0; border-radius: 999px;
  padding: 10px 20px; cursor: pointer; font-weight: 700; box-shadow: 0 4px 0 rgba(0,0,0,.18);
  transition: transform .1s ease, box-shadow .1s ease;
}
button:active { transform: translateY(2px); box-shadow: 0 2px 0 rgba(0,0,0,.18); }
button.zweit { background: var(--ki-bg); color: var(--akzent); border: 1.5px solid var(--ki-rand); box-shadow: none; }
button:disabled { opacity: .55; cursor: wait; }
:focus-visible { outline: 3px solid var(--fokus); outline-offset: 2px; }
select, input[type=text], textarea {
  background: var(--ki-bg); border: 1.5px solid var(--ki-rand); border-radius: 16px; padding: 10px 14px;
}
body.thema-glas select option { background: #142046; }

/* ---------- Kopfbereich mit Roboter ---------- */
header.glas { padding: 14px 18px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
header .titel { flex: 1; min-width: 180px; }
header h1 { font-size: 1.35rem; margin: 0; }
header .untertitel { font-size: .9rem; color: var(--leise); margin: 2px 0 0; }
.kopf-robot { width: 74px; height: 80px; flex: none; }
.status {
  display: inline-block; margin-top: 6px; font-size: .82rem; font-weight: 700;
  padding: 3px 12px; border-radius: 999px; background: var(--ki-bg); border: 1.5px solid var(--ki-rand);
}
.status::before { content: "●"; margin-right: 6px; color: #2bc36b; }
.robot.denkt ~ .titel .status::before, .status.denkt::before { color: var(--akzent2); animation: blink 1s infinite; }

/* ---------- Roboter-Animationen ---------- */
.robot svg { width: 100%; height: 100%; display: block; overflow: visible; }
.robot .r-schwebe { animation: schweben 3.2s ease-in-out infinite; transform-origin: center; }
.robot .r-auge { animation: zwinkern 4.5s infinite; transform-box: fill-box; transform-origin: center; }
.robot .r-zahnrad { transform-box: fill-box; transform-origin: center; }
.robot.denkt .r-z1 { animation: drehen 1.6s linear infinite; }
.robot.denkt .r-z2 { animation: drehen 1.1s linear infinite reverse; }
.robot.denkt .r-antenne { animation: leuchten .7s ease-in-out infinite alternate; }
.robot.denkt .r-augen { animation: umschauen 2.4s ease-in-out infinite; }
.robot.denkt .r-schwebe { animation-duration: 1.2s; }
.robot.denkt .r-led { animation: blink .9s infinite; }
.robot.denkt .r-led2 { animation-delay: .3s; } .robot.denkt .r-led3 { animation-delay: .6s; }
.robot.freut .r-schwebe { animation: huepfen .5s ease-out 2; }
@keyframes schweben { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-4px); } }
@keyframes zwinkern { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(.1); } }
@keyframes drehen { to { transform: rotate(360deg); } }
@keyframes leuchten { from { filter: none; } to { filter: drop-shadow(0 0 6px #ffc83d) brightness(1.3); } }
@keyframes umschauen { 0%,100% { transform: translateX(0); } 30% { transform: translateX(-4px); } 70% { transform: translateX(4px); } }
@keyframes huepfen { 0%,100% { transform: translateY(0); } 40% { transform: translateY(-10px); } }
@keyframes blink { 50% { opacity: .25; } }

/* ---------- Anmeldung ---------- */
#anmeldung { padding: 28px; text-align: center; margin-top: 4vh; }
#anmeldung .robot { width: 130px; height: 140px; margin: 0 auto 4px; }
#anmeldung h2 { margin: 6px 0; }
#anmeldung p { color: var(--leise); }
#anmeldung form { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
#anmeldung input { text-transform: uppercase; min-width: 200px; text-align: center; letter-spacing: .1em; font-weight: 700; }

/* ---------- Chat ---------- */
#chat { flex: 1; display: none; flex-direction: column; gap: 14px; }
#verlauf { flex: 1; padding: 18px; display: flex; flex-direction: column; gap: 14px; min-height: 45vh; overflow-y: auto; }
.zeile { display: flex; gap: 8px; align-items: flex-end; max-width: 92%; }
.zeile.von-ki { align-self: flex-start; }
.mini-robot { width: 38px; height: 42px; flex: none; }
.blase { padding: 11px 16px; border-radius: 20px; word-wrap: break-word; min-width: 0; }
.blase p { margin: .3em 0; }
.blase ul, .blase ol { margin: .3em 0; padding-left: 1.3em; }
.blase code { background: rgba(127,127,127,.15); padding: 1px 6px; border-radius: 6px; font-size: .92em; }
.kind { align-self: flex-end; max-width: 85%; background: var(--kind); color: #fff; border-bottom-right-radius: 6px; box-shadow: 0 4px 14px rgba(80,70,200,.25); }
.kind code { background: rgba(255,255,255,.22); }
.ki { background: var(--ki-bg); border: 1.5px solid var(--ki-rand); border-bottom-left-radius: 6px; }
.fehler { align-self: center; color: var(--fehler); background: var(--ki-bg); border: 1.5px solid var(--fehler); font-size: .95rem; }
.punkte span { display: inline-block; width: 9px; height: 9px; margin: 0 2px; border-radius: 50%; background: var(--akzent); animation: tippen 1.1s infinite ease-in-out; }
.punkte span:nth-child(2) { animation-delay: .15s; background: var(--akzent2); }
.punkte span:nth-child(3) { animation-delay: .3s; }
.punkte small { margin-left: 8px; color: var(--leise); }
@keyframes tippen { 0%, 60%, 100% { transform: translateY(0); opacity: .5; } 30% { transform: translateY(-6px); opacity: 1; } }

.leer { color: var(--leise); text-align: center; margin: auto; max-width: 520px; }
.leer .robot { width: 110px; height: 118px; margin: 0 auto 6px; }
.leer .sprech {
  position: relative; display: inline-block; background: var(--ki-bg); color: var(--text);
  border: 1.5px solid var(--ki-rand); border-radius: 18px; padding: 10px 16px; margin-bottom: 4px;
}
.leer .vorschlaege { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 14px; }
.leer .vorschlaege button { font-weight: 600; font-size: .93rem; }

form#eingabe { padding: 10px; display: flex; gap: 8px; align-items: flex-end; border-radius: 999px; }
form#eingabe textarea { flex: 1; resize: none; min-height: 48px; max-height: 160px; border-radius: 24px; }
form#eingabe button { padding: 12px 22px; }
.hinweis { font-size: .8rem; color: var(--leise); text-align: center; margin: 0; }

/* ---------- Gläserner Agent: Denkschritte als Zeitleiste ---------- */
details.schritte { align-self: flex-start; width: min(100%, 640px); margin-left: 46px; background: rgba(127,127,255,.07); border: 1.5px dashed var(--gedanke); border-radius: 18px; padding: 10px 14px; font-size: .95rem; }
details.schritte summary { cursor: pointer; font-weight: 800; color: var(--gedanke); }
.schritt { position: relative; margin: 12px 0 4px; padding: 8px 12px 8px 44px; border-radius: 14px; background: var(--ki-bg); border: 1px solid var(--ki-rand); }
.schritt::before {
  position: absolute; left: 8px; top: 8px; width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center; font-size: 15px;
}
.schritt.gedanke::before { content: "💭"; background: rgba(122,79,214,.18); }
.schritt.werkzeug::before { content: "🛠️"; background: rgba(11,138,95,.18); }
.schritt + .schritt::after { /* Verbindungslinie */
  content: ""; position: absolute; left: 21px; top: -13px; width: 2px; height: 12px; background: var(--ki-rand);
}
.schritt .etikett { font-size: .74rem; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.schritt.gedanke .etikett { color: var(--gedanke); }
.schritt.werkzeug .etikett { color: var(--werkzeug); }
.schritt pre { background: rgba(127,127,127,.12); padding: 6px 8px; border-radius: 8px; overflow-x: auto; font-size: .82rem; margin: 4px 0; white-space: pre-wrap; word-break: break-word; }
.schritt.neu { animation: einblenden .35s ease-out; }
@keyframes einblenden { from { opacity: 0; transform: translateX(-8px); } to { opacity: 1; transform: none; } }

.schleife { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; padding: 10px 14px; font-size: .85rem; }
.schleife span { background: var(--ki-bg); border-radius: 999px; padding: 4px 12px; border: 1.5px solid var(--ki-rand); font-weight: 600; transition: all .25s; }
.schleife span.pfeil { background: none; border: 0; padding: 4px 0; color: var(--leise); }
.schleife span.aktiv { background: var(--akzent); color: var(--akzent-text); border-color: var(--akzent); transform: scale(1.08); box-shadow: 0 0 16px var(--akzent); }

/* ---------- Startseite ---------- */
.kopf { display: block !important; padding: 26px 22px; text-align: center; }
.kopf h1 { margin: 0 0 6px; font-size: 1.8rem; }
.kopf p { margin: 0; color: var(--leise); }
.kacheln { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 18px; }
a.kachel { display: flex; flex-direction: column; gap: 10px; padding: 22px; text-decoration: none; color: var(--text); transition: transform .2s ease, box-shadow .2s ease; overflow: hidden; }
a.kachel:hover, a.kachel:focus-visible { transform: translateY(-4px) rotate(-.4deg); box-shadow: 0 18px 44px rgba(40,60,120,.22); }
a.kachel:hover .robot .r-schwebe { animation: huepfen .5s ease-out; }
a.kachel .buehne { height: 150px; border-radius: 16px; display: grid; place-items: center; }
a.kachel .buehne .robot { width: 120px; height: 130px; }
a.kachel.k-lern .buehne { background: linear-gradient(160deg, #dfeaff, #ffe7d9); }
a.kachel.k-glas .buehne { background: radial-gradient(circle at 30% 20%, #2b3b80, #0c1226); }
a.kachel.k-glas:hover .r-z1, a.kachel.k-glas:focus-visible .r-z1 { animation: drehen 1.6s linear infinite; }
a.kachel.k-glas:hover .r-z2, a.kachel.k-glas:focus-visible .r-z2 { animation: drehen 1.1s linear infinite reverse; }
a.kachel h2 { margin: 4px 0 0; font-size: 1.35rem; }
a.kachel p { margin: 0; color: var(--leise); flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { font-size: .8rem; font-weight: 600; background: var(--ki-bg); border: 1.5px solid var(--ki-rand); border-radius: 999px; padding: 2px 10px; }
.los { font-weight: 800; color: var(--akzent); }
footer { text-align: center; font-size: .85rem; color: var(--leise); padding: 6px 0 14px; }

/* ---------- Bewegung reduzieren, Handy ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .kopf-robot { width: 56px; height: 62px; }
  header select { flex: 1 1 100%; order: 3; max-width: 100%; }
  header label[for=thema] { display: none; }
  .zeile { max-width: 100%; }
  .mini-robot { width: 30px; height: 34px; }
  details.schritte { margin-left: 0; }
  .schleife { font-size: .78rem; }
}