/* Layout: App-Shell – Seitenleiste am Desktop, Tab-Leiste unten am Handy; Rechnungsvorschau als DIN-A4-Blatt */
:root{
  --bg:#f3f5f6; --surface:#ffffff; --surface-2:#eaeef0; --line:#d6dde1;
  --fg:#16232b; --muted:#5b6b75; --accent:#1c5d6b; --accent-fg:#ffffff; --accent-soft:#dbecef;
  --ok:#2f7a4b; --ok-soft:#dff1e5; --warn:#a26300; --warn-soft:#fbeed6; --bad:#b03a2e; --bad-soft:#f8e1de;
  --paper:#ffffff; --paper-fg:#1b1b1b; --paper-line:#d9d9d9;
  --f-body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-num:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --r:8px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0f171b; --surface:#16222a; --surface-2:#1d2c35; --line:#2b3d47;
  --fg:#e3eaee; --muted:#93a5af; --accent:#5fb3c4; --accent-fg:#06232a; --accent-soft:#183942;
  --ok:#6cc790; --ok-soft:#163327; --warn:#e3a646; --warn-soft:#3a2b12; --bad:#ef7f72; --bad-soft:#3d1c19;
  --paper:#fbfbfa; --paper-fg:#1b1b1b; --paper-line:#d9d9d9; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f171b; --surface:#16222a; --surface-2:#1d2c35; --line:#2b3d47;
  --fg:#e3eaee; --muted:#93a5af; --accent:#5fb3c4; --accent-fg:#06232a; --accent-soft:#183942;
  --ok:#6cc790; --ok-soft:#163327; --warn:#e3a646; --warn-soft:#3a2b12; --bad:#ef7f72; --bad-soft:#3d1c19;
  --paper:#fbfbfa; --paper-fg:#1b1b1b; --paper-line:#d9d9d9; color-scheme:dark}
*{box-sizing:border-box}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:15px;line-height:1.5}
button,input,select,textarea{font:inherit;color:inherit}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums}
h1,h2,h3{margin:0;text-wrap:balance;letter-spacing:-.01em}
h1{font-size:1.6rem;font-weight:800}
h2{font-size:1.1rem;font-weight:700}
.eyebrow{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Login */
.login{min-height:100%;display:grid;place-items:center;padding:24px 16px}
.login-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:28px;display:grid;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.1rem}
.mark{width:30px;height:30px;border-radius:6px;background:var(--accent);color:var(--accent-fg);display:grid;place-items:center;font-size:.8rem;font-weight:800;letter-spacing:.02em}
.demo-note{font-size:.82rem;color:var(--muted);background:var(--surface-2);padding:10px 12px;border-radius:6px}

/* Shell */
.shell{display:grid;grid-template-columns:230px 1fr;min-height:100%}
.side{background:var(--surface);border-right:1px solid var(--line);padding:20px 14px;display:flex;flex-direction:column;gap:22px;position:sticky;top:0;height:100vh}
.nav{display:grid;gap:2px}
.nav button{all:unset;cursor:pointer;display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:6px;color:var(--muted);font-weight:500}
.nav button:hover{background:var(--surface-2);color:var(--fg)}
.nav button[aria-current="page"]{background:var(--accent-soft);color:var(--fg);font-weight:600}
.nav svg{width:18px;height:18px;flex:none}
.side .who{margin-top:auto;font-size:.82rem;color:var(--muted);display:grid;gap:6px}
main{min-width:0;padding-block:28px 96px;padding-inline:clamp(16px,4vw,40px);max-width:1100px;width:100%}
.head{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:12px;margin-bottom:22px}
.head > div{display:grid;gap:4px}
.tabbar{display:none}

@media (max-width:820px){
  .shell{grid-template-columns:1fr}
  .side{display:none}
  .tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px);z-index:20}
  .tabbar button{all:unset;cursor:pointer;display:grid;justify-items:center;gap:2px;padding:8px 2px;font-size:.68rem;color:var(--muted)}
  .tabbar button[aria-current="page"]{color:var(--accent);font-weight:700}
  .tabbar svg{width:20px;height:20px}
  .mobile-top{display:flex!important}
}
.mobile-top{display:none;align-items:center;justify-content:space-between;margin-bottom:14px}

/* Controls */
.btn{border:1px solid var(--line);background:var(--surface);padding:8px 14px;border-radius:6px;cursor:pointer;font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.btn:hover{background:var(--surface-2)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.danger{color:var(--bad);border-color:var(--bad-soft)}
.btn.ghost{border-color:transparent;background:transparent}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;flex-wrap:wrap;gap:8px}
label.f{display:grid;gap:4px;font-size:.82rem;color:var(--muted);font-weight:500;min-width:0}
input,select,textarea{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:8px 10px;width:100%;min-width:0}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}
.grid{display:grid;gap:12px}
.g2{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:grid;gap:14px;min-width:0}
.stack{display:grid;gap:18px}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.9rem}
.check input{width:auto;margin-top:4px}
.hint{font-size:.82rem;color:var(--muted)}

/* KPIs */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:22px}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;display:grid;gap:4px}
.kpi .v{font-family:var(--f-num);font-size:1.3rem;font-weight:600}
.kpi.warn .v{color:var(--warn)}

/* Tables */
.tbl-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
table.t{width:100%;border-collapse:collapse;font-size:.9rem}
table.t th{text-align:left;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
table.t td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
table.t tr:last-child td{border-bottom:none}
table.t tr.click{cursor:pointer}
table.t tr.click:hover td{background:var(--surface-2)}
.r{text-align:right!important}
.pill{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.75rem;font-weight:600;white-space:nowrap}
.p-entwurf{background:var(--surface-2);color:var(--muted)}
.p-offen{background:var(--accent-soft);color:var(--accent)}
.p-bezahlt{background:var(--ok-soft);color:var(--ok)}
.p-ueberfaellig{background:var(--warn-soft);color:var(--warn)}
.p-storniert{background:var(--bad-soft);color:var(--bad)}
.filters{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:4px 12px;font-size:.82rem;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--fg);color:var(--bg);border-color:var(--fg)}
.empty{padding:28px;text-align:center;color:var(--muted)}

/* Editor positions */
.pos{display:grid;gap:10px}
.pos-row{display:grid;grid-template-columns:minmax(0,3fr) 80px 90px 120px 90px 110px 36px;gap:8px;align-items:end}
.pos-row .sum{font-family:var(--f-num);text-align:right;padding:8px 0}
.pos-head{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
@media (max-width:820px){
  .pos-head{display:none}
  .pos-row{grid-template-columns:1fr 1fr;padding:12px;border:1px solid var(--line);border-radius:6px}
  .pos-row .desc{grid-column:1/-1}
  .pos-row .sum{text-align:left}
}
.totals{display:grid;gap:6px;justify-self:end;min-width:min(320px,100%)}
.totals div{display:flex;justify-content:space-between;gap:24px}
.totals .grand{border-top:2px solid var(--fg);padding-top:8px;font-weight:700;font-size:1.05rem}
.issues{background:var(--warn-soft);color:var(--warn);border-radius:6px;padding:10px 14px;font-size:.88rem}
.issues ul{margin:4px 0 0;padding-left:18px}
.lock{display:flex;gap:10px;align-items:center;background:var(--accent-soft);border-radius:6px;padding:10px 14px;font-size:.88rem}

/* Paper */
.paper-wrap{overflow-x:auto;padding:4px 0}
.paper{background:var(--paper);color:var(--paper-fg);width:794px;min-height:1123px;margin:0 auto;padding:64px 70px 50px;box-shadow:0 2px 20px rgba(0,0,0,.12);font-size:12.5px;line-height:1.45;display:flex;flex-direction:column;font-family:var(--f-body)}
.paper .top{display:flex;justify-content:space-between;gap:20px}
.paper .logo{font-weight:800;font-size:20px}
.paper .sender-line{font-size:9px;text-decoration:underline;color:#555;margin:46px 0 6px}
.paper .addr{min-height:110px}
.paper .meta{display:grid;grid-template-columns:auto auto;gap:2px 16px;font-size:12px;align-content:start}
.paper .meta span:nth-child(odd){color:#666}
.paper h3{font-size:19px;margin:26px 0 4px}
.paper table{width:100%;border-collapse:collapse;margin-top:18px}
.paper th{text-align:left;font-size:10.5px;text-transform:uppercase;letter-spacing:.04em;color:#555;border-bottom:1px solid #222;padding:6px 4px}
.paper td{padding:7px 4px;border-bottom:1px solid var(--paper-line);vertical-align:top}
.paper .ptot{margin-left:auto;width:280px;margin-top:12px;display:grid;gap:3px}
.paper .ptot div{display:flex;justify-content:space-between}
.paper .ptot .g{border-top:1.5px solid #222;padding-top:5px;font-weight:700;font-size:14px}
.paper .note{margin-top:22px;display:grid;gap:6px}
.paper footer{margin-top:auto;padding-top:16px;border-top:1px solid var(--paper-line);display:grid;grid-template-columns:repeat(3,1fr);gap:12px;font-size:9.5px;color:#555}
.stamp{display:inline-block;border:2px solid #b03a2e;color:#b03a2e;padding:2px 10px;font-weight:800;transform:rotate(-4deg);letter-spacing:.1em;font-size:14px}

/* Modal + toast */
.scrim{position:fixed;inset:0;background:rgba(10,20,25,.45);display:grid;place-items:center;padding:16px;z-index:50}
.modal{background:var(--surface);border-radius:10px;max-width:440px;width:100%;padding:22px;display:grid;gap:14px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(76px + env(safe-area-inset-bottom,0px));background:var(--fg);color:var(--bg);padding:10px 16px;border-radius:6px;font-size:.9rem;z-index:60}
.proto{font-size:.72rem;background:var(--warn-soft);color:var(--warn);padding:2px 8px;border-radius:4px;font-weight:600}
@media (prefers-reduced-motion:no-preference){.toast{animation:up .2s ease-out}@keyframes up{from{opacity:0;translate:0 8px}}}

.sr-m{display:none}@media (max-width:820px){.sr-m{display:inline}}
a.btn{text-decoration:none}
.err{background:var(--bad-soft);color:var(--bad);border-radius:6px;padding:10px 14px;font-size:.88rem;white-space:pre-line}
.row-actions{display:flex;gap:4px;justify-content:flex-end}
.loading{min-height:100%;display:grid;place-items:center;color:var(--muted)}
body{margin:0}
[hidden]{display:none!important}