/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
    --bg:         #0d1117;
    --bg-card:    #161b22;
    --bg-input:   #0d1117;
    --sidebar:    #0d1117;
    --border:     #30363d;
    --accent:     #388bfd;
    --accent-dim: #1f4070;
    --text:       #e6edf3;
    --text-muted: #8b949e;
    --success:    #3fb950;
    --warning:    #d29922;
    --danger:     #f85149;
    --info:       #58a6ff;
    --radius:     6px;
    --shadow:     0 1px 3px rgba(0,0,0,.4);
    --sidebar-w:  220px;
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body { font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
       background: var(--bg); color: var(--text); min-height: 100vh; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── App shell ─────────────────────────────────────────────────────────────── */
.app-shell { display: flex; min-height: 100vh; padding-top: 44px; }

/* ── Sidebar ───────────────────────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--sidebar);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    position: fixed; top: 44px; left: 0; bottom: 0;
    z-index: 100;
}
.sidebar-logo {
    padding: 18px 16px;
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; gap: 10px;
}
.logo-icon   { font-size: 1.5rem; color: var(--accent); }
.logo-text   { font-weight: 700; font-size: .95rem; letter-spacing: .02em; }

.sidebar-nav { flex: 1; padding: 12px 8px; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px; border-radius: var(--radius);
    color: var(--text-muted); font-size: .875rem;
    transition: background .15s, color .15s;
}
.nav-item:hover { background: #1c2128; color: var(--text); text-decoration: none; }
.nav-item.active { background: var(--accent-dim); color: var(--accent); font-weight: 600; }
.nav-icon { font-size: 1rem; width: 16px; text-align: center; }

/* ── Cross-site topbar ──────────────────────────────────────────────────────── */
.topbar { height: 44px; background: #1c2128; border-bottom: 2px solid var(--accent); display: flex; align-items: center; padding: 0 24px 0 calc(var(--sidebar-w) + 24px); position: fixed; top: 0; left: 0; right: 0; z-index: 200; }
.cross-nav { display: flex; gap: 20px; }
.cross-nav a { color: var(--text-muted); font-size: 13px; text-decoration: none; }
.cross-nav a:hover { color: var(--text); }
.cross-nav a.current { color: var(--text); font-weight: 600; }

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex; flex-direction: column; gap: 6px;
}
.sidebar-user { font-size: .75rem; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.btn-logout { font-size: .75rem; color: var(--danger); }
.btn-logout:hover { text-decoration: underline; }

/* ── Main content ──────────────────────────────────────────────────────────── */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1; padding: 28px 32px;
    max-width: 1200px;
}

/* ── Page header ───────────────────────────────────────────────────────────── */
.page-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 24px;
}
.page-title { font-size: 1.4rem; font-weight: 700; }
.page-subtitle { font-size: .85rem; color: var(--text-muted); margin-top: 2px; }

/* ── Flash messages ────────────────────────────────────────────────────────── */
.flash {
    padding: 12px 16px; border-radius: var(--radius); margin-bottom: 20px;
    font-size: .875rem; border-left: 4px solid;
}
.flash-success { background: #0d2317; border-color: var(--success); color: #56d364; }
.flash-error   { background: #2d0f0f; border-color: var(--danger);  color: var(--danger); }
.flash-info    { background: #0d1f3c; border-color: var(--info);    color: var(--info); }
.flash-warning { background: #2d1e00; border-color: var(--warning); color: #e3b341; }

/* ── Cards ─────────────────────────────────────────────────────────────────── */
.card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
}
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    padding-bottom: 14px; margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.card-title { font-size: 1rem; font-weight: 600; }

/* ── Stat cards ────────────────────────────────────────────────────────────── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px,1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card  { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat-label { font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.stat-value { font-size: 2rem; font-weight: 700; margin: 4px 0; }
.stat-sub   { font-size: .75rem; color: var(--text-muted); }

/* ── Tables ────────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
thead th {
    text-align: left; padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted); font-size: .75rem;
    text-transform: uppercase; letter-spacing: .05em; font-weight: 600;
}
tbody tr { border-bottom: 1px solid #1c2128; transition: background .1s; }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: #1c2128; }
td { padding: 10px 12px; vertical-align: middle; }
td a { color: var(--text); }
td a:hover { color: var(--accent); }

/* ── Badges ────────────────────────────────────────────────────────────────── */
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 20px;
    font-size: .7rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
}
.badge-new         { background:#0d2d2d; color:#39d0d0; }
.badge-needs_review{ background:#2d1a00; color:#f0a500; }
.badge-accepted    { background:#0d2317; color:#3fb950; }
.badge-rejected    { background:#2d0f0f; color:#f85149; }
.badge-sent        { background:#0d1f3c; color:#58a6ff; }
.badge-draft       { background:#1a1a2e; color:#8b949e; }
.badge-paid        { background:#0d2317; color:#3fb950; }
.badge-unpaid      { background:#2d1a00; color:#d29922; }
.badge-overdue     { background:#2d0f0f; color:#f85149; }
.badge-active      { background:#0d2317; color:#3fb950; }
.badge-archived    { background:#1a1a2e; color:#6e7681; }
.badge-cancelled   { background:#1a1a2e; color:#6e7681; }
.badge-suspended   { background:#2d1a00; color:#d29922; }
.badge-individual  { background:#1e1b30; color:#a5b4fc; }
.badge-company     { background:#1a2d1a; color:#86efac; }
.badge-prospect    { background:#2d1a00; color:#fbbf24; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 14px; border-radius: var(--radius);
    font-size: .875rem; font-weight: 500; border: 1px solid transparent;
    cursor: pointer; transition: opacity .15s, filter .15s; text-decoration: none;
}
.btn:hover { opacity: .85; text-decoration: none; }
.btn-primary  { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-outline  { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: #1c2128; }
.btn-danger   { background: #2d0f0f; color: var(--danger); border-color: var(--danger); }
.btn-success  { background: #0d2317; color: var(--success); border-color: var(--success); }
.btn-sm       { padding: 4px 10px; font-size: .8rem; }
.btn-block    { width: 100%; justify-content: center; }

/* ── Forms ─────────────────────────────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 8px 12px;
    color: var(--text); font-size: .875rem;
    transition: border-color .15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(56,139,253,.15);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group select option { background: var(--bg-card); }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ── Filters bar ───────────────────────────────────────────────────────────── */
.filters-bar {
    display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
    margin-bottom: 16px;
}
.filters-bar input[type=search],
.filters-bar select {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 7px 12px;
    color: var(--text); font-size: .875rem;
}
.filters-bar input[type=search] { min-width: 220px; }

/* ── Detail layout ─────────────────────────────────────────────────────────── */
.detail-grid { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 900px) { .detail-grid { grid-template-columns: 1fr; } }
.detail-row  { display: flex; gap: 6px; font-size: .875rem; margin-bottom: 8px; }
.detail-label{ color: var(--text-muted); min-width: 140px; }

/* ── Invoice lines ─────────────────────────────────────────────────────────── */
.lines-table th { font-size: .75rem; }
.line-row input { background: var(--bg-input); border: 1px solid var(--border); border-radius: 4px;
    padding: 5px 8px; color: var(--text); font-size: .85rem; width: 100%; }
.lines-total { text-align: right; font-size: .9rem; margin-top: 12px; color: var(--text-muted); }
.lines-total strong { color: var(--text); font-size: 1.1rem; }

/* ── Login ─────────────────────────────────────────────────────────────────── */
.login-body { display: flex; align-items: center; justify-content: center;
    min-height: 100vh; background: var(--bg); }
.login-card { background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 40px; width: 100%; max-width: 380px;
    box-shadow: var(--shadow); }
.login-logo { text-align: center; margin-bottom: 28px; }
.logo-icon-big { font-size: 2.5rem; color: var(--accent); display: block; margin-bottom: 8px; }
.login-logo h1 { font-size: 1.3rem; }
.login-logo p  { color: var(--text-muted); font-size: .85rem; margin-top: 4px; }

/* ── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
    .main-content { margin-left: 0; padding: 16px; }
    .sidebar { display: none; }
}