:root{
  --accent:#4582B4; --accent-dark:#324A6D; --ink:#333; --muted:#7a869a;
  --line:#e4e8ee; --bg:#f4f6f9; --card:#fff; --ok:#2e7d32; --err:#c0392b;
  --shadow:0 1px 3px rgba(20,40,80,.08),0 4px 16px rgba(20,40,80,.06);
}
*{box-sizing:border-box}
body{margin:0;font-family:Roboto,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.5}
.container{max-width:1100px;margin:0 auto;padding:0 18px}
a{color:var(--accent)}
.muted{color:var(--muted);font-weight:400;font-size:.82em}

/* Navbar */
.navbar{background:var(--accent-dark);color:#fff;box-shadow:var(--shadow)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-weight:600;font-size:1.05rem;display:flex;align-items:center;gap:10px}
.brand-logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:7px;
  background:#fff;color:var(--accent-dark);font-weight:800}
.nav-logout{margin:0}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;
  padding:6px 14px;border-radius:8px;cursor:pointer;font-size:.9rem}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

.intro{margin:20px 0 8px;color:#4a5568;max-width:820px}
.banner{padding:12px 16px;border-radius:10px;margin:12px 0}
.banner.err{background:#fdecea;color:var(--err);border:1px solid #f5c6cb}

/* Toolbar */
.toolbar{display:flex;gap:10px;align-items:center;margin:14px 0;flex-wrap:wrap}
#search{flex:1;min-width:220px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;
  font-size:1rem;background:#fff}
.chk-only{display:flex;align-items:center;gap:6px;color:#4a5568;font-size:.9rem;white-space:nowrap}
.spacer{flex:1}
.btn{background:var(--accent);color:#fff;border:none;padding:9px 16px;border-radius:9px;
  cursor:pointer;font-size:.92rem;transition:transform .05s,box-shadow .15s}
.btn:hover{box-shadow:var(--shadow);transform:translateY(-1px)}
.btn:active{transform:none}

/* Tabelle */
.table-scroll{overflow-x:auto;background:var(--card);border-radius:12px;box-shadow:var(--shadow)}
table.contacts{width:100%;border-collapse:collapse;min-width:520px}
.contacts th,.contacts td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line)}
.contacts thead th{position:sticky;top:0;background:#f7f9fc;z-index:2;font-size:.82rem;
  text-transform:uppercase;letter-spacing:.03em;color:#55617a}
.col-book{text-align:center;width:1%;white-space:nowrap}
.col-tel{color:#42506a}
.tel{display:inline-block;margin-right:10px;font-variant-numeric:tabular-nums}
.crow:hover{background:#f8fbff}
.assign{width:20px;height:20px;cursor:pointer;accent-color:var(--accent)}
.crow.hidden{display:none}
.assign.saving{opacity:.4}

.books-info{margin:26px 0 60px;background:var(--card);border-radius:12px;padding:18px 20px;
  box-shadow:var(--shadow)}
.books-info h2{margin:.2em 0 .3em;font-size:1.1rem}
.books-info ul{list-style:none;padding:0;margin:12px 0 0}
.books-info li{padding:8px 0;border-top:1px solid var(--line);display:flex;gap:10px;
  align-items:center;flex-wrap:wrap}
.dav-url{background:#f2f5f9;padding:3px 8px;border-radius:6px;font-size:.82rem;color:#33506e;
  word-break:break-all}
.btn-copy{background:none;border:1px solid var(--line);border-radius:6px;padding:3px 10px;
  cursor:pointer;font-size:.8rem;color:var(--accent)}

/* Toast */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);
  background:#2b3a55;color:#fff;padding:10px 18px;border-radius:10px;opacity:0;pointer-events:none;
  transition:opacity .2s,transform .2s;font-size:.9rem;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.err{background:var(--err)}

/* Login */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:20px;
  background:linear-gradient(160deg,#3a5680,#243651)}
.login-card{background:#fff;border-radius:16px;overflow:hidden;width:100%;max-width:380px;
  box-shadow:0 18px 50px rgba(0,0,0,.28)}
.login-hero{background:var(--accent-dark);color:#fff;padding:26px 28px 22px;text-align:center}
.login-logo{width:52px;height:52px;border-radius:12px;background:#fff;color:var(--accent-dark);
  font-weight:800;font-size:1.6rem;display:grid;place-items:center;margin:0 auto 10px}
.login-hero h1{margin:.1em 0;font-size:1.25rem}
.login-sub{margin:0;opacity:.82;font-size:.9rem}
.login-body{padding:24px 28px 28px;display:flex;flex-direction:column;gap:14px}
.login-body label{display:flex;flex-direction:column;gap:5px;font-size:.85rem;color:#4a5568}
.login-body input[type=text],.login-body input[type=password],.login-body input:not([type]){
  padding:10px 12px;border:1px solid var(--line);border-radius:9px;font-size:1rem}
.login-remember{flex-direction:row!important;align-items:center;gap:8px!important}
.login-body button{background:var(--accent);color:#fff;border:none;padding:11px;border-radius:9px;
  font-size:1rem;cursor:pointer;margin-top:4px}
.login-err{background:#fdecea;color:var(--err);padding:9px 12px;border-radius:8px;font-size:.88rem}

@media(max-width:560px){
  .intro{font-size:.92rem}
  .contacts th,.contacts td{padding:8px}
}