:root{
  --brand:#143b6b;
  --bg:#f4f6f9; --card:#ffffff; --fg:#1f2733; --mut:#5b6675; --bd:#dde3ea;
  --ok:#1f8a4c; --err:#c62f2f;
}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;
  background:var(--bg);color:var(--fg);
  font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}

/* Kopfbalken (dunkelblau) mit Logo rechts */
.topbar{background:var(--brand)}
.topbar-inner{max-width:980px;margin:0 auto;height:72px;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between}
.topbar-spacer{flex:1}
.topbar img,.brand-logo{height:44px;width:auto;max-width:78vw;display:block}

/* Titelzeile */
.titlebar{background:#fff;border-bottom:1px solid var(--bd)}
.titlebar-inner{max-width:980px;margin:0 auto;padding:18px 20px}
.titlebar h1{margin:0;font-size:1.55rem;font-weight:700;color:var(--brand);letter-spacing:.2px}

/* Inhalt */
.wrap{flex:1;display:flex;justify-content:center;align-items:flex-start;padding:32px 20px}
.card{width:min(460px,100%);background:var(--card);border:1px solid var(--bd);
  border-radius:14px;padding:32px;box-shadow:0 6px 24px rgba(0,0,0,.06)}
#lead{margin:0 0 20px;font-size:1.05rem;color:var(--fg)}
input{width:100%;padding:13px 14px;margin-bottom:14px;background:#fff;color:var(--fg);
  border:1px solid var(--bd);border-radius:9px;font-size:1rem}
input:focus{outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
button{width:100%;padding:13px;border:0;border-radius:9px;background:var(--brand);color:#fff;
  font-size:1rem;font-weight:600;cursor:pointer}
button:hover{filter:brightness(1.1)}
button:disabled{opacity:.5;cursor:default}
button.ghost{background:#fff;color:var(--mut);border:1px solid var(--bd)}
button.ghost:hover{background:var(--bg);filter:none;color:var(--fg)}
.actions button{width:auto;padding:9px 14px;font-weight:500}
.modal-actions button{width:auto;padding:9px 14px;font-weight:500}
.msg.sub{color:var(--mut);font-size:.88rem}
.msg{min-height:1.2em;margin:12px 0 0;font-size:.92rem}.msg.ok{color:var(--ok)}.msg.err{color:var(--err)}
#drop{border:2px dashed var(--bd);border-radius:11px;padding:42px 16px;text-align:center;
  color:var(--mut);cursor:pointer;transition:.15s;background:#fafbfc}
#drop.hot{border-color:var(--brand);color:var(--fg);background:color-mix(in srgb,var(--brand) 7%,#fff)}
#code{letter-spacing:.5em;text-align:center;font-size:1.4rem}
.modal{position:fixed;inset:0;background:rgba(15,23,33,.55);display:flex;
  align-items:center;justify-content:center;padding:20px;z-index:50}
.modal[hidden]{display:none}
.modal-card{width:min(460px,94vw);background:#fff;border:1px solid var(--bd);
  border-radius:14px;padding:28px}
.modal-card h3{margin:0 0 14px;font-size:1.2rem;color:var(--fg)}
.modal-card h3.ok{color:var(--ok)}.modal-card h3.err{color:var(--err)}
.modal-card pre{white-space:pre-wrap;word-break:break-word;margin:0 0 20px;
  font:.9rem/1.5 system-ui,sans-serif;color:var(--mut)}