:root {
    --bg: #eef1f4;
    --surface: #ffffff;
    --ink: #1a2332;
    --muted: #5c6b7a;
    --line: #d5dde5;
    --brand: #0d4f6b;
    --brand-2: #167a8b;
    --accent: #c45c26;
    --ok: #1f7a4c;
    --warn: #9a6b00;
    --danger: #b42318;
    --info: #1d5f9c;
    --shadow: 0 10px 30px rgba(26, 35, 50, 0.08);
    --radius: 12px;
    --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font);
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(22, 122, 139, 0.12), transparent 35%),
        linear-gradient(160deg, #f5f7f9 0%, #e8eef2 55%, #f3efe8 100%);
    min-height: 100vh;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-shell {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: linear-gradient(180deg, #0d4f6b 0%, #0a3a4f 100%);
    color: #f4f8fa;
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.brand {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    padding: 0.25rem 0.5rem;
}
.brand-mark {
    width: 42px; height: 42px;
    border-radius: 10px;
    background: linear-gradient(135deg, #c45c26, #e08a4f);
    display: grid; place-items: center;
    font-weight: 800; letter-spacing: 0.02em;
}
.brand strong { display: block; font-size: 1rem; }
.brand small { color: rgba(244,248,250,0.7); }

.nav { display: flex; flex-direction: column; gap: 0.25rem; flex: 1; }
.nav a {
    color: rgba(244,248,250,0.88);
    padding: 0.7rem 0.85rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
}
.nav a:hover, .nav a.active {
    background: rgba(255,255,255,0.12);
    color: #fff;
}

.sidebar-footer {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.user-chip strong { display: block; }
.user-chip span { font-size: 0.85rem; color: rgba(244,248,250,0.7); }

.main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.75rem 0.5rem;
}
.topbar h1 { margin: 0; font-size: 1.5rem; font-weight: 700; }
.content { padding: 1rem 1.75rem 2rem; }

.timer-widget {
    display: flex; align-items: center; gap: 0.75rem;
    background: #fff7f0; border: 1px solid #f0d2bf;
    padding: 0.45rem 0.7rem; border-radius: 999px;
}
.timer-widget .timer-label { font-size: 0.75rem; text-transform: uppercase; color: var(--accent); font-weight: 700; }
#timer-clock { font-variant-numeric: tabular-nums; font-weight: 700; }

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}
.card h2, .card h3 { margin-top: 0; }
.card-header {
    display: flex; justify-content: space-between; align-items: center;
    gap: 1rem; margin-bottom: 1rem;
}
.card-header h2 { margin: 0; font-size: 1.15rem; }

.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stat {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    box-shadow: var(--shadow);
}
.stat .label { color: var(--muted); font-size: 0.85rem; }
.stat .value { font-size: 1.55rem; font-weight: 700; margin-top: 0.25rem; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}
th, td {
    text-align: left;
    padding: 0.7rem 0.6rem;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:hover td { background: #f8fafb; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.35rem;
    border: 1px solid transparent;
    background: var(--brand);
    color: #fff;
    border-radius: 8px;
    padding: 0.55rem 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.92rem;
}
.btn:hover { filter: brightness(1.05); text-decoration: none; }
.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.82rem; }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-accent { background: var(--accent); }
.btn-danger { background: var(--danger); }
.btn-ok { background: var(--ok); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.25); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

label { display: block; font-weight: 600; margin-bottom: 0.35rem; font-size: 0.9rem; }
.form-row { margin-bottom: 0.9rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.9rem 1rem; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="date"], input[type="time"], input[type="datetime-local"], select, textarea {
    width: 100%;
    padding: 0.6rem 0.7rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    font: inherit;
    color: var(--ink);
}
textarea { min-height: 90px; resize: vertical; }
.help { color: var(--muted); font-size: 0.85rem; margin-top: 0.25rem; }

.badge {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    background: #e8eef2;
    color: var(--ink);
}
.badge-active, .badge-approved, .badge-done, .badge-in_progress, .badge-paid { background: #d9f2e5; color: var(--ok); }
.badge-quoted, .badge-pending, .badge-todo, .badge-draft, .badge-sent { background: #fff0d6; color: var(--warn); }
.badge-on_hold, .badge-rejected, .badge-cancelled, .badge-overdue { background: #fde3e0; color: var(--danger); }
.badge-completed, .badge-partially_paid { background: #dcecff; color: var(--info); }

.alert {
    padding: 0.8rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}
.alert-success { background: #e8f7ef; border-color: #b7e4c7; color: var(--ok); }
.alert-error { background: #fdeceb; border-color: #f3c2bd; color: var(--danger); }
.alert-info { background: #eaf3fb; border-color: #bfd8ef; color: var(--info); }

.auth-layout {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    background:
        linear-gradient(135deg, rgba(13,79,107,0.92), rgba(22,122,139,0.85)),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.auth-card {
    width: min(420px, 100%);
    background: #fff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.auth-card h1 { margin: 0 0 0.25rem; }
.auth-card .subtitle { color: var(--muted); margin-bottom: 1.5rem; }
.auth-hint {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
    font-size: 0.85rem;
    color: var(--muted);
}
.auth-hint code { background: #f0f3f6; padding: 0.1rem 0.35rem; border-radius: 4px; }

.muted { color: var(--muted); }
.stack { display: flex; flex-direction: column; gap: 0.75rem; }
.inline-form { display: inline; }
.empty { color: var(--muted); padding: 1rem 0; }

.tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; flex-wrap: wrap; }
.tabs a, .tabs span {
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: var(--ink);
    text-decoration: none;
    font-size: 0.9rem;
}
.tabs a.active, .tabs span.active { background: var(--brand); color: #fff; border-color: var(--brand); }

.filters {
    display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: end;
    margin-bottom: 1rem;
}
.filters .form-row { margin: 0; min-width: 160px; }

.log-item {
    border-left: 3px solid var(--brand-2);
    padding: 0.6rem 0.9rem;
    margin-bottom: 0.75rem;
    background: #f7fafb;
    border-radius: 0 8px 8px 0;
}
.log-item .meta { font-size: 0.8rem; color: var(--muted); margin-bottom: 0.25rem; }

.costing-box {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
}
.costing-box .stat .value.profit-pos { color: var(--ok); }
.costing-box .stat .value.profit-neg { color: var(--danger); }

@media (max-width: 1100px) {
    .grid-4, .costing-box { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
    .app-shell { grid-template-columns: 1fr; }
    .sidebar { position: sticky; top: 0; z-index: 10; }
    .nav { flex-direction: row; flex-wrap: wrap; }
    .form-grid, .grid-2, .grid-3, .grid-4, .costing-box { grid-template-columns: 1fr; }
    .topbar { flex-direction: column; align-items: flex-start; }
}