:root{
  /* VetStage-Brand-Tokens (Quelle: .claude/skills/vetstage-ux/SKILL.md) */
  --coral:#FF6E5E; --coral-hover:#FF5745; --coral-dark:#B8382A; --navy:#004867; --ink:#333333; --white:#FFFFFF;
  --gray-hover:#F2F2F2; --gray-active:#D9D9D9; --gray-disabled:#E6E6E6; --gray-border:#DDDDDD; --gray-bg:#FAFAFA; --gray-section:#F8F8F8;
  --coral-tint:#FFF1EF;
  --muted:#666666;
  --right:#2E8B50; --right-bg:#E8F5EC;
  --wrong:#B33A3A; --wrong-bg:#F8E7E5;
  --focus:#004867;
}
*,*::before,*::after{box-sizing:border-box}
html{height:100%}
body{margin:0;background:var(--white);color:var(--ink);font-family:"Source Sans Pro",system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--navy)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px 64px}

/* Header (Koralle-Band, Landingpage-Pattern) */
.header{background:var(--coral);color:var(--white);padding:32px 0 36px}
.header .wrap{padding-top:0}
.header .brand{display:flex;align-items:center;margin-bottom:22px}
.header .brand img{height:26px;width:auto;display:block}
.headline-teaser{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--white);opacity:.92;margin:0 0 4px}
h1{font-size:2rem;font-weight:700;line-height:1.2;margin:0 0 14px}
.header h1{color:var(--white)}
.intro{max-width:62ch;margin:0 0 22px;opacity:.95}
.header .intro{color:var(--white)}
.intro strong{font-weight:700}

.btn{font:inherit;font-weight:700;font-size:15px;border-radius:25px;padding:10px 24px;cursor:pointer;border:1px solid var(--gray-border);background:var(--white);color:var(--ink);transition:background-color .2s ease,border-color .2s ease,color .2s ease;display:inline-flex;align-items:center;gap:8px;min-height:44px}
.btn:hover{background:var(--gray-hover)}
.btn.primary{background:var(--coral);border-color:var(--coral);color:var(--white)}
.btn.primary:hover{background:var(--coral-hover);border-color:var(--coral-hover)}
.btn[disabled],.btn.primary[disabled]{cursor:default;background:var(--gray-disabled);border-color:var(--gray-disabled);color:var(--muted)}
.btn[disabled]:hover,.btn.primary[disabled]:hover{background:var(--gray-disabled);border-color:var(--gray-disabled)}
.btn:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

/* Buttons auf Korall-Hintergrund: nie .btn.primary (=coral) auf Koralle */
.header .btn{background:transparent;border-color:rgba(255,255,255,.6);color:var(--white)}
.header .btn:hover{background:rgba(255,255,255,.12)}

/* Body-Bereich: linke Sidebar (Navigation/Filter/Chat-Promo) + Hauptspalte */
.body{padding-top:28px}
.layout{display:flex;gap:32px;align-items:flex-start}
.sidebar{flex:0 0 264px;display:flex;flex-direction:column;gap:22px;position:sticky;top:20px}
.main{flex:1;min-width:0}

.side-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin:0 0 10px}

/* Sidebar-Nav (Ansicht) und Kapitel-Filter teilen sich dasselbe Button-Vokabular
   (Law of Similarity) statt zweier unterschiedlicher Stile nebeneinander. */
.side-modes,.bar{display:flex;flex-direction:column;gap:8px}
.side-modes button,.chip{font:inherit;font-size:14px;font-weight:600;border:1px solid var(--gray-border);background:var(--white);color:var(--ink);padding:11px 16px;border-radius:8px;cursor:pointer;min-height:44px;text-align:left;transition:background-color .2s ease,border-color .2s ease,color .2s ease}
.side-modes button{font-weight:700}
.side-modes button:hover:not([aria-pressed="true"]),.chip:hover:not([aria-pressed="true"]){background:var(--gray-hover);border-color:var(--gray-active)}
.side-modes button[aria-pressed="true"],.chip[aria-pressed="true"]{background:var(--coral);color:var(--white);border-color:var(--coral)}
.side-modes button:focus-visible,.chip:focus-visible{outline:3px solid var(--focus);outline-offset:2px}

.promo{background:var(--coral-tint);border-radius:8px;padding:26px 24px}
.promo h2{font-size:1.3rem;margin:0 0 10px;font-weight:700}
.promo p{margin:0 0 20px;color:var(--muted);font-size:15px;line-height:1.5}
.promo .btn{width:100%;justify-content:center}

@media (max-width:820px){
  .layout{flex-direction:column}
  .sidebar{position:static;width:100%;flex:0 0 auto}
  .side-modes{flex-direction:row;flex-wrap:wrap}
  .bar{flex-direction:row;flex-wrap:wrap}
}

.status{display:flex;justify-content:space-between;align-items:baseline;font-size:14px;color:var(--muted);margin-bottom:10px}
.track{height:4px;background:var(--gray-disabled);border-radius:2px;margin-bottom:22px;overflow:hidden}
.track span{display:block;height:100%;background:var(--coral);width:0;transition:width .25s ease}

/* Frage-Karte */
.card{position:relative;background:var(--white);border:1px solid var(--gray-border);border-radius:8px;padding:26px 74px 24px 26px;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.tab{position:absolute;top:22px;right:-1px;width:52px;padding:12px 0 14px;background:var(--coral);color:var(--white);border-radius:8px 0 0 8px;text-align:center;line-height:1.05}
.tab small{display:block;font-size:11px;opacity:.9;font-weight:600}
.tab b{display:block;font-size:22px;font-weight:700;margin-top:2px}
.kap{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);margin:0 0 10px}
.q{font-size:1.2rem;line-height:1.35;font-weight:700;margin:0 0 20px}
.opts{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.opt{width:100%;text-align:left;font:inherit;color:var(--ink);background:var(--white);border:1.5px solid var(--gray-border);border-radius:8px;padding:12px 14px;cursor:pointer;display:flex;gap:12px;align-items:flex-start;min-height:44px;transition:border-color .2s ease,background-color .2s ease}
.opt:hover:not([disabled]){border-color:var(--coral);background:var(--gray-hover)}
.opt .k{flex:0 0 auto;width:24px;height:24px;border-radius:50%;border:1.5px solid var(--gray-border);display:grid;place-items:center;font-size:12px;font-weight:700;color:var(--muted);margin-top:1px}
.opt[disabled]{cursor:default}
.opt.right{border-color:var(--right);background:var(--right-bg)}
.opt.right .k{background:var(--right);border-color:var(--right);color:var(--white)}
.opt.wrong{border-color:var(--wrong);background:var(--wrong-bg)}
.opt.wrong .k{background:var(--wrong);border-color:var(--wrong);color:var(--white)}
.opt.dim{opacity:.55}
.fb{margin-top:20px;border-top:1px dashed var(--gray-border);padding-top:18px}
.fb .verdict{font-weight:700;margin:0 0 6px}
.fb .verdict.ok{color:var(--right)} .fb .verdict.no{color:var(--wrong)}
.fb p{margin:0 0 12px;max-width:64ch}
.src{font-size:14px;color:var(--muted);margin:0}
.src b{color:var(--ink);font-weight:600}
.nav{display:flex;justify-content:space-between;gap:10px;margin-top:22px;flex-wrap:wrap}
.hint{font-size:13px;color:var(--muted);margin-top:14px}

/* Ergebnis */
.result h2{font-size:1.7rem;margin:0 0 6px;font-weight:700}
.result .big{font-size:56px;line-height:1;margin:6px 0 4px;color:var(--coral);font-weight:700}
.result .headline{font-size:15px;color:var(--muted);margin:0 0 4px}
.result ul{padding-left:18px;margin:10px 0 0}
.result li{margin-bottom:10px}
.result li span{color:var(--muted);font-size:14px}

/* Liste */
.list{display:grid;gap:14px}
.item{position:relative;background:var(--white);border:1px solid var(--gray-border);border-radius:8px;padding:18px 70px 16px 20px;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.item .tab{top:16px;padding:9px 0 10px;width:48px}
.item .tab b{font-size:19px}
.item h3{font-size:17px;line-height:1.35;margin:0 0 8px;font-weight:700}
.item .ans{font-weight:700;color:var(--right);margin:0 0 6px}
.item p{margin:0 0 10px;max-width:64ch}

/* Chat */
.chat{background:var(--white);border:1px solid var(--gray-border);border-radius:8px;display:flex;flex-direction:column;max-height:min(78vh,760px);box-shadow:0 2px 8px rgba(0,0,0,.08)}
.log{flex:1;min-height:220px;padding:20px 20px 8px;display:flex;flex-direction:column;gap:14px;overflow-y:auto}
.msg{max-width:62ch;line-height:1.55}
.msg.user{align-self:flex-end;background:var(--coral);color:var(--white);padding:10px 14px;border-radius:14px 14px 4px 14px}
.msg.bot{align-self:flex-start}
.msg.bot p{margin:0 0 10px}
.msg.bot ul{margin:0 0 10px;padding-left:20px}
.msg.bot .pg{display:inline-block;font-size:13px;font-weight:600;color:var(--navy);border:1px solid var(--navy);border-radius:6px;padding:0 5px;margin:0 1px;white-space:nowrap}
.msg.status{color:var(--muted);font-size:14px;font-style:italic}
.msg.err{color:var(--wrong);font-size:14px}
.empty{color:var(--muted);font-size:15px}
.empty p{margin:0 0 10px}
.sugg{display:flex;flex-wrap:wrap;gap:8px}
.sugg button{font:inherit;font-size:14px;text-align:left;border:1px dashed var(--gray-border);background:transparent;color:var(--ink);border-radius:8px;padding:10px 12px;cursor:pointer;min-height:44px;transition:border-color .2s ease}
.sugg button:hover{border-color:var(--coral)}
.composer{display:flex;gap:10px;padding:14px;border-top:1px solid var(--gray-border);align-items:flex-end}
.composer textarea{flex:1;font:inherit;color:var(--ink);background:var(--gray-bg);border:1.5px solid var(--gray-border);border-radius:8px;padding:10px 12px;resize:none;min-height:46px;max-height:160px}
.composer textarea:focus-visible{outline:3px solid var(--focus);outline-offset:1px}
.chatnote{font-size:13px;color:var(--muted);margin:10px 2px 0}

footer{margin-top:44px;padding-top:24px;border-top:1px solid var(--gray-border);font-size:14px;color:var(--muted)}
footer .footer-logo{height:20px;width:auto;display:block;margin-bottom:14px}
footer p{margin:0 0 8px}
footer a{color:var(--muted);text-decoration:underline}
footer a:hover{color:var(--ink)}

@media (max-width:520px){
  .wrap{padding-left:16px;padding-right:16px}
  .header{padding:26px 0 30px}
  .card{padding:22px 62px 20px 18px}
  .tab{width:46px}
  .item{padding:16px 60px 14px 16px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}