/* ═══════════════════════════════════════════════════════════════════
   Rechnungsverwaltung 2.0 – Design System
   ═══════════════════════════════════════════════════════════════════ */

/* ── Variablen ─────────────────────────────────────────────────────── */
:root {
  --accent:        #0f766e;
  --accent-hover:  #0c5e57;
  --accent-light:  #f0fdfa;
  --accent-shadow: rgba(15,118,110,.18);

  --bg:       #f0f3f8;
  --surface:  #ffffff;
  --surface2: #f7f9fc;
  --surface3: #eef2f7;
  --border:   #dde3ec;
  --border2:  #edf1f6;

  --text:  #1a2332;
  --text2: #5a6a7e;
  --text3: #9aabb8;

  --nav-bg:     #111827;
  --nav-text:   rgba(255,255,255,.6);
  --nav-active: #ffffff;
  --nav-accent: #34d399;

  --sidebar-w: 224px;
  --topbar-h:  52px;
  --radius:    8px;
  --radius-lg: 12px;
  --shadow:    0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1),0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.12),0 4px 8px rgba(0,0,0,.06);
}

/* Akzentfarben */
body.accent-blue   { --accent:#1d4ed8;--accent-hover:#1e40af;--accent-light:#eff6ff;--accent-shadow:rgba(29,78,216,.18);--nav-accent:#60a5fa; }
body.accent-violet { --accent:#7c3aed;--accent-hover:#6d28d9;--accent-light:#f5f3ff;--accent-shadow:rgba(124,58,237,.18);--nav-accent:#a78bfa; }
body.accent-rose   { --accent:#e11d48;--accent-hover:#be123c;--accent-light:#fff1f2;--accent-shadow:rgba(225,29,72,.18);--nav-accent:#fb7185; }
body.accent-amber  { --accent:#d97706;--accent-hover:#b45309;--accent-light:#fffbeb;--accent-shadow:rgba(217,119,6,.18);--nav-accent:#fbbf24; }
body.accent-slate  { --accent:#475569;--accent-hover:#334155;--accent-light:#f8fafc;--accent-shadow:rgba(71,85,105,.18);--nav-accent:#94a3b8; }

/* Dark Theme */
body.theme-dark {
  --bg:#0d1117;--surface:#161b22;--surface2:#1c2128;--surface3:#21262d;
  --border:#30363d;--border2:#21262d;--text:#e6edf3;--text2:#8b949e;--text3:#484f58;
  --nav-bg:#010409;--shadow:0 1px 3px rgba(0,0,0,.3),0 1px 2px rgba(0,0,0,.2);
}

/* ── Reset ─────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:14px;-webkit-font-smoothing:antialiased}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* ── Superadmin-Bar ────────────────────────────────────────────────── */
.superadmin-bar{background:#7c3aed;color:#fff;text-align:center;padding:4px;font-size:11px;font-weight:600;letter-spacing:.04em}

/* ── Topbar Layout ─────────────────────────────────────────────────── */
body.layout-topbar .topbar{background:var(--nav-bg);height:var(--topbar-h);position:sticky;top:0;z-index:200;display:flex;align-items:center;padding:0 24px;gap:0;box-shadow:0 1px 0 rgba(255,255,255,.06),0 2px 8px rgba(0,0,0,.25)}
.topbar-brand{font-size:13px;font-weight:700;color:#fff;white-space:nowrap;margin-right:24px;display:flex;align-items:center;gap:8px;text-decoration:none}
.topbar-brand:hover{text-decoration:none}
.brand-icon{color:var(--nav-accent);font-size:18px}
.topbar-nav{display:flex;align-items:stretch;height:var(--topbar-h);flex:1}
.topbar-nav>a{display:flex;align-items:center;padding:0 13px;font-size:13px;font-weight:500;color:var(--nav-text);text-decoration:none;border-bottom:2px solid transparent;transition:all .15s;white-space:nowrap}
.topbar-nav>a:hover{color:#fff;background:rgba(255,255,255,.06)}
.topbar-nav>a.active{color:var(--nav-active);border-bottom-color:var(--nav-accent)}
.topbar-dropdown{position:relative;display:flex;align-items:stretch}
.topbar-dropdown-btn{display:flex;align-items:center;padding:0 13px;font-size:13px;font-weight:500;color:var(--nav-text);background:none;border:none;border-bottom:2px solid transparent;cursor:pointer;font-family:inherit;white-space:nowrap;transition:all .15s;height:100%}
.topbar-dropdown-btn:hover,.topbar-dropdown-btn.active{color:#fff;border-bottom-color:var(--nav-accent)}
.topbar-dropdown-menu{display:none;position:absolute;top:100%;left:0;min-width:160px;background:var(--nav-bg);border:1px solid rgba(255,255,255,.08);border-top:2px solid var(--nav-accent);border-radius:0 0 var(--radius) var(--radius);box-shadow:var(--shadow-md);z-index:999;padding:4px 0}
.topbar-dropdown:hover .topbar-dropdown-menu{display:block}
.topbar-dropdown-menu a{display:block;padding:9px 14px;font-size:13px;color:var(--nav-text);text-decoration:none;transition:all .12s}
.topbar-dropdown-menu a:hover{color:#fff;background:rgba(255,255,255,.07)}
.topbar-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.topbar-user{font-size:12px;color:rgba(255,255,255,.45);white-space:nowrap}
.topbar-logout{font-size:12px;color:rgba(255,255,255,.4);text-decoration:none;padding:5px 10px;border-radius:5px;border:1px solid rgba(255,255,255,.15);transition:all .15s}
.topbar-logout:hover{color:#fff;border-color:rgba(255,255,255,.4);text-decoration:none}
body.layout-topbar .page{padding:24px 28px;max-width:1680px;margin:0 auto}

/* ── Sidebar Layout ─────────────────────────────────────────────────── */
body.layout-sidebar .sidebar-wrap{display:flex;min-height:100vh}
body.layout-sidebar .sidebar{width:var(--sidebar-w);min-height:100vh;background:var(--nav-bg);position:fixed;top:0;left:0;display:flex;flex-direction:column;z-index:200;box-shadow:2px 0 12px rgba(0,0,0,.2)}
.sidebar-brand{padding:16px 18px 12px;border-bottom:1px solid rgba(255,255,255,.07);display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:#fff}
.brand-icon-sm{color:var(--nav-accent);font-size:16px}
.sidebar-nav{flex:1;padding:10px 0;overflow-y:auto}
.sidebar-nav a{display:flex;align-items:center;gap:9px;padding:9px 18px;font-size:13px;font-weight:500;color:var(--nav-text);text-decoration:none;transition:all .12s;border-left:3px solid transparent}
.sidebar-nav a:hover{color:#fff;background:rgba(255,255,255,.06);text-decoration:none}
.sidebar-nav a.active{color:var(--nav-active);background:rgba(255,255,255,.08);border-left-color:var(--nav-accent)}
.nav-section{font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.25);padding:12px 18px 4px}
.nav-icon{width:16px;text-align:center;flex-shrink:0}
.sidebar-footer{padding:12px 18px;border-top:1px solid rgba(255,255,255,.07);display:flex;flex-direction:column;gap:5px}
.sidebar-user{font-size:12px;color:rgba(255,255,255,.4)}
.sidebar-logout{font-size:12px;color:rgba(255,255,255,.4);text-decoration:none;padding:5px 10px;border-radius:5px;border:1px solid rgba(255,255,255,.12);transition:all .15s;text-align:center;display:block}
.sidebar-logout:hover{color:#fff;border-color:rgba(255,255,255,.35);text-decoration:none}
body.layout-sidebar .page{margin-left:var(--sidebar-w);padding:24px 28px;flex:1;min-width:0}

/* ── Auth Layout ───────────────────────────────────────────────────── */
.auth-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}
.auth-wrap{width:100%;max-width:420px}
.auth-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 28px;box-shadow:var(--shadow-md)}
.auth-logo{text-align:center;margin-bottom:24px}
.brand-icon-lg{font-size:36px;color:var(--accent);display:block;margin-bottom:8px}
.auth-logo h1{font-size:20px;font-weight:800;color:var(--text)}

/* ── Page ───────────────────────────────────────────────────────────── */
.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:22px;gap:16px}
.page-title{font-size:20px;font-weight:700;color:var(--text);line-height:1.2}
.page-subtitle{font-size:13px;color:var(--text2);margin-top:3px}
.page-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}

/* ── Cards ──────────────────────────────────────────────────────────── */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.card-header{display:flex;justify-content:space-between;align-items:center;padding:14px 22px;border-bottom:1px solid var(--border2);background:var(--surface2)}
.card-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text2)}
.card-body{padding:20px 22px}
.card-footer{padding:12px 22px;border-top:1px solid var(--border2);background:var(--surface2);display:flex;align-items:center;justify-content:flex-end;gap:8px}

/* Stat Cards */
.stat-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px;margin-bottom:22px}
.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px 22px;box-shadow:var(--shadow)}
.stat-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text2)}
.stat-value{font-size:26px;font-weight:800;color:var(--text);line-height:1.1;letter-spacing:-.5px;margin:4px 0 2px}
.stat-sub{font-size:12px;color:var(--text2)}
.stat-icon{width:36px;height:36px;background:var(--accent-light);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--accent);margin-bottom:6px;font-size:16px}

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);font-size:13px;font-weight:600;font-family:inherit;cursor:pointer;border:none;text-decoration:none;transition:all .15s;white-space:nowrap;line-height:1}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);box-shadow:0 3px 8px var(--accent-shadow)}
.btn-secondary{background:var(--surface);color:var(--text);border:1.5px solid var(--border)}
.btn-secondary:hover{background:var(--surface2);border-color:var(--text3)}
.btn-danger{background:#dc2626;color:#fff}
.btn-danger:hover{background:#b91c1c;box-shadow:0 3px 8px rgba(220,38,38,.3)}
.btn-ghost{background:transparent;color:var(--text2);border:1.5px solid var(--border)}
.btn-ghost:hover{background:var(--surface2);color:var(--text)}
.btn-sm{padding:5px 11px;font-size:12px}
.btn-lg{padding:11px 22px;font-size:14px}

/* ── Forms ──────────────────────────────────────────────────────────── */
.form-group{display:flex;flex-direction:column;margin-bottom:14px}
.form-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text2);margin-bottom:5px;display:block}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.form-hint{font-size:11px;color:var(--text3);margin-top:3px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],input[type=search],textarea,select{width:100%;padding:8px 11px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:13px;background:var(--surface);color:var(--text);transition:border-color .15s,box-shadow .15s;font-family:inherit;appearance:none}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-shadow)}
input:disabled,textarea:disabled,select:disabled{background:var(--surface2);color:var(--text3);cursor:not-allowed}
textarea{resize:vertical;min-height:80px;line-height:1.5}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239aabb8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:32px;cursor:pointer}

/* ── Tables ─────────────────────────────────────────────────────────── */
.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;font-size:13px}
thead{background:var(--surface2)}
th{font-size:10.5px;font-weight:700;color:var(--text2);text-transform:uppercase;letter-spacing:.07em;padding:10px 14px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}
td{padding:10px 14px;border-bottom:1px solid var(--border2);color:var(--text);vertical-align:middle}
tr:last-child td{border-bottom:none}
tbody tr:hover td{background:var(--surface2)}
.td-right{text-align:right}
.td-center{text-align:center}

/* ── Badges ─────────────────────────────────────────────────────────── */
.badge{display:inline-flex;align-items:center;padding:2px 9px;border-radius:99px;font-size:11px;font-weight:700;white-space:nowrap}
.badge-green {background:#dcfce7;color:#15803d}
.badge-yellow{background:#fef9c3;color:#854d0e}
.badge-amber {background:#fef3c7;color:#92400e}
.badge-red   {background:#fee2e2;color:#991b1b}
.badge-blue  {background:#dbeafe;color:#1e40af}
.badge-violet{background:#ede9fe;color:#5b21b6}
.badge-gray  {background:#f1f5f9;color:#475569}
.badge-teal  {background:#f0fdfa;color:#0f766e}
body.theme-dark .badge-green {background:rgba(22,163,74,.2);color:#4ade80}
body.theme-dark .badge-red   {background:rgba(220,38,38,.2);color:#f87171}
body.theme-dark .badge-gray  {background:rgba(71,85,105,.3);color:#94a3b8}
body.theme-dark .badge-blue  {background:rgba(37,99,235,.2);color:#60a5fa}

/* ── Flash ──────────────────────────────────────────────────────────── */
.flash-container{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.flash{padding:11px 16px;border-radius:var(--radius);font-size:13px;font-weight:500;display:flex;align-items:center;gap:8px;border:1px solid transparent}
.flash--success{background:#dcfce7;color:#166534;border-color:#bbf7d0}
.flash--error  {background:#fee2e2;color:#991b1b;border-color:#fecaca}
.flash--warning{background:#fef3c7;color:#92400e;border-color:#fde68a}
.flash--info   {background:#dbeafe;color:#1e40af;border-color:#bfdbfe}
body.theme-dark .flash--success{background:rgba(22,163,74,.15);color:#4ade80;border-color:rgba(22,163,74,.3)}
body.theme-dark .flash--error  {background:rgba(220,38,38,.15);color:#f87171;border-color:rgba(220,38,38,.3)}

/* ── Modal ──────────────────────────────────────────────────────────── */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);backdrop-filter:blur(2px);z-index:500;align-items:flex-start;justify-content:center;padding:32px 16px;overflow-y:auto}
.modal-overlay.open{display:flex}
.modal{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;animation:modal-in .2s ease}
.modal-sm{max-width:420px}.modal-md{max-width:600px}.modal-lg{max-width:860px}.modal-xl{max-width:1100px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 22px;border-bottom:1px solid var(--border2)}
.modal-title{font-size:15px;font-weight:700}
.modal-close{background:none;border:none;cursor:pointer;color:var(--text3);padding:4px;border-radius:4px;font-size:18px;line-height:1}
.modal-close:hover{color:var(--text);background:var(--surface2)}
.modal-body{padding:20px 22px}
.modal-footer{padding:14px 22px;border-top:1px solid var(--border2);display:flex;justify-content:flex-end;gap:8px;background:var(--surface2);border-radius:0 0 var(--radius-lg) var(--radius-lg)}
@keyframes modal-in{from{opacity:0;transform:scale(.96) translateY(8px)}to{opacity:1;transform:none}}

/* ── Tabs ───────────────────────────────────────────────────────────── */
.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:20px;gap:0;overflow-x:auto}
.tab-btn{padding:9px 16px;font-size:13px;font-weight:600;color:var(--text2);border:none;background:none;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .15s;font-family:inherit;white-space:nowrap}
.tab-btn:hover{color:var(--text)}
.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}
.tab-content{display:none}
.tab-content.active{display:block}

/* ── Filter Bar ─────────────────────────────────────────────────────── */
.filter-bar{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.filter-bar input,.filter-bar select{max-width:220px}

/* ── Positions-Tabelle ──────────────────────────────────────────────── */
.pos-row{display:grid;grid-template-columns:1fr 70px 110px 75px 28px;gap:6px;align-items:end;margin-bottom:6px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:8px 10px}
.pos-totals{display:flex;flex-direction:column;align-items:flex-end;gap:4px;padding:10px 0 0}
.total-row{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--text2)}
.total-row .lbl{min-width:110px;text-align:right}
.total-row .val{min-width:90px;text-align:right;font-weight:600;color:var(--text)}
.total-row.grand{font-size:15px;font-weight:800;color:var(--text);border-top:2px solid var(--border);padding-top:6px;margin-top:2px}

/* ── Artikel-Suche ──────────────────────────────────────────────────── */
.artikel-search-wrap{position:relative;flex:1}
.artikel-dropdown{position:absolute;z-index:999;top:100%;left:0;right:0;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-md);max-height:220px;overflow-y:auto;display:none}
.artikel-dropdown.open{display:block}
.artikel-option{padding:9px 12px;cursor:pointer;font-size:13px;border-bottom:1px solid var(--border2)}
.artikel-option:hover{background:var(--surface2)}
.artikel-option strong{display:block}
.artikel-option span{font-size:11px;color:var(--text2)}

/* ── Grids ──────────────────────────────────────────────────────────── */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.grid-4{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:16px}

/* ── Utility ────────────────────────────────────────────────────────── */
.text-right {text-align:right}.text-center{text-align:center}
.text-muted {color:var(--text3)}.text-danger{color:#dc2626}.text-success{color:#16a34a}
.text-sm    {font-size:12px}.fw-bold{font-weight:700}
.mt-4{margin-top:16px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}
.d-none{display:none!important}.flex{display:flex;align-items:center}.gap-2{gap:8px}

/* ── Responsive ─────────────────────────────────────────────────────── */
@media(max-width:1024px){.form-row-3{grid-template-columns:1fr 1fr}.grid-4{grid-template-columns:1fr 1fr}.stat-row{grid-template-columns:1fr 1fr}}
@media(max-width:768px){body.layout-topbar .page,body.layout-sidebar .page{padding:16px}.form-row,.form-row-3,.grid-2,.grid-3{grid-template-columns:1fr}.page-header{flex-direction:column}.filter-bar{flex-direction:column;align-items:flex-start}.filter-bar input,.filter-bar select{max-width:100%;width:100%}}
@media print{.sidebar,.topbar,.page-actions,.btn,.modal-overlay,.no-print{display:none!important}body.layout-sidebar .page{margin-left:0}body{background:#fff}.card{box-shadow:none;border:1px solid #ddd}}