:root {
    --navy: #1f2a38;
    --navy-dark: #161e29;
    --gold: #c9a24a;
    --green: #1f6f3e;
    --red: #b5473a;
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --border: #dde1e6;
    --text: #202833;
    --muted: #6b737b;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
    line-height: 1.5;
}

a { color: #1155cc; text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.1rem; margin: 28px 0 10px; color: var(--navy); }
.muted { color: var(--muted); font-size: 0.9rem; }

/* ---- top navigation ---- */
.topbar {
    background: var(--navy);
    color: #fff;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 12px 24px;
    flex-wrap: wrap;
}
.topbar .brand { font-weight: 700; font-size: 1.1rem; letter-spacing: 0.02em; }
.topbar nav { display: flex; gap: 18px; flex: 1; flex-wrap: wrap; }
.topbar nav a { color: #d7dbe0; font-size: 0.95rem; }
.topbar nav a:hover { color: #fff; text-decoration: none; }
.topbar .userbox { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: #b8bfc7; }
.topbar .userbox a { color: var(--gold); }

.page { max-width: 1100px; margin: 0 auto; padding: 24px; }

/* ---- nav cards on dashboard ---- */
.nav-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin: 16px 0 24px;
}
.nav-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    display: block;
    color: var(--navy);
    font-weight: 600;
}
.nav-card:hover { border-color: var(--gold); text-decoration: none; }
.nav-card span { display: block; font-weight: 400; color: var(--muted); font-size: 0.85rem; margin-top: 4px; }

/* ---- KPI blocks ---- */
.kpi-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 8px;
}
.kpi {
    background: var(--navy);
    color: #fff;
    border-radius: var(--radius);
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.kpi-label { font-size: 0.78rem; color: #b8c0c9; }
.kpi-value { font-size: 1.5rem; font-weight: 700; }

/* ---- cards / forms ---- */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    margin-bottom: 20px;
}
.card summary { cursor: pointer; margin-bottom: 4px; }

.grid-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 12px;
}
.grid-form label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.85rem;
    color: var(--muted);
}
.grid-form label.wide { grid-column: 1 / -1; }
.grid-form input, .grid-form select,
.inline-form input, .inline-form select {
    font-family: inherit;
    font-size: 0.95rem;
    padding: 7px 9px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: #fff;
    color: var(--text);
}
.grid-form input:focus, .grid-form select:focus,
.inline-form input:focus, .inline-form select:focus,
form.card input:focus { outline: 2px solid var(--gold); outline-offset: 1px; }

button, .btn-secondary {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: 4px;
    border: none;
    background: var(--navy);
    color: #fff;
    cursor: pointer;
}
button:hover { background: var(--navy-dark); }
.grid-form button.wide { grid-column: 1 / -1; justify-self: start; }
.btn-secondary {
    background: #fff;
    color: var(--navy);
    border: 1px solid var(--border);
    display: inline-block;
}
.btn-danger, .btn-danger-small {
    background: var(--red);
}
.btn-danger:hover, .btn-danger-small:hover { background: #8f382e; }
.btn-danger-small { padding: 4px 10px; font-size: 0.8rem; }

.locked-field { position: relative; }
.locked-field input {
    background: #f6f4ee; border-color: #e8dfc4; color: #b8ab7e; letter-spacing: 2px;
}
.locked-field .lock-tag {
    position: absolute; right: 8px; top: 26px; font-size: 0.68rem;
    background: var(--gold); color: #3a2e12; padding: 1px 7px; border-radius: 8px; font-weight: 600;
}

.inline-form { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }

/* ---- login form ---- */
form.card {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
form.card label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; color: var(--muted); }

/* ---- tables ---- */
.data-table, .summary-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.data-table { display: block; overflow-x: auto; white-space: nowrap; }
.data-table table { width: 100%; }
.data-table th, .data-table td,
.summary-table th, .summary-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 0.9rem;
}
.data-table th { background: var(--navy); color: #fff; font-weight: 600; font-size: 0.82rem; }
.data-table tbody tr:hover { background: #fafbfc; }
.data-table tfoot td { font-weight: 700; background: #fafbfc; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.neg { color: var(--red); }

.summary-table { margin-bottom: 20px; }
.summary-table tr.total-row td { font-weight: 700; color: var(--green); border-top: 2px solid var(--border); }
.summary-table td:first-child { color: var(--muted); }

.highlight-row td { background: #fff6d9; }
.tag { font-size: 0.72rem; background: var(--gold); color: #3a2e12; padding: 1px 6px; border-radius: 10px; margin-left: 6px; }

/* ---- badges ---- */
.badge { display: inline-block; padding: 2px 9px; border-radius: 10px; font-size: 0.78rem; font-weight: 600; }
.badge-in-stock { background: #e4ecf4; color: #2a5488; }
.badge-sold { background: #e3f1e7; color: var(--green); }
.badge-reserved { background: #fdeed6; color: #a0631a; }

/* ---- alerts ---- */
.alert { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 16px; font-size: 0.9rem; }
.alert-success { background: #e3f1e7; color: var(--green); }
.alert-error { background: #fbe7e5; color: var(--red); }

/* ---- detail page ---- */
.detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    align-items: start;
}
.detail-grid.single { grid-template-columns: 1fr; max-width: 700px; }
@media (max-width: 800px) {
    .detail-grid { grid-template-columns: 1fr; }
}