* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --border: #2a2d3a;
    --text: #e4e4e7;
    --text-muted: #71717a;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #22c55e;
    --danger: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.screen { display: flex; }
.hidden { display: none !important; }

/* ---- Auth Screen ---- */
#auth-screen {
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.auth-container h1 { font-size: 1.5rem; margin-bottom: 8px; }
.auth-container p { color: var(--text-muted); margin-bottom: 24px; }

#login-form { display: flex; flex-direction: column; gap: 12px; }

#login-form input {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text);
    font-size: 0.95rem;
}

#login-form input:focus { outline: none; border-color: var(--accent); }

button {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s;
}
button:hover { background: var(--accent-hover); }

.error { color: var(--danger); margin-top: 12px; font-size: 0.85rem; }

/* ---- Dashboard Layout ---- */
#dashboard-screen { flex-direction: column; min-height: 100vh; }

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.header-left h1 { font-size: 1.25rem; }

.header-right { display: flex; align-items: center; gap: 16px; }
.header-right span { color: var(--text-muted); font-size: 0.85rem; }

#logout-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    font-size: 0.85rem;
}
#logout-btn:hover { border-color: var(--danger); color: var(--danger); }

/* ---- Company Filter Tabs ---- */
.company-filter-bar {
    padding: 12px 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.company-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.company-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: 20px;
    transition: all 0.2s;
}

.company-btn:hover {
    border-color: var(--accent);
    color: var(--text);
}

.company-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.company-btn[data-company]:not([data-company="all"]).active {
    background: var(--co-color, var(--accent));
    border-color: var(--co-color, var(--accent));
}

/* ---- Controls ---- */
.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.date-range { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.date-range label { font-size: 0.85rem; color: var(--text-muted); }

.date-range input[type="date"] {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    color: var(--text);
    font-size: 0.85rem;
}

.date-range button { padding: 8px 16px; font-size: 0.85rem; }

#refresh-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.last-updated { font-size: 0.8rem; color: var(--text-muted); }

/* ---- Summary Cards ---- */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    padding: 0 24px 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
}

.card h3 {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.card span { font-size: 1.5rem; font-weight: 700; }

/* ---- Company Breakdown (All-view) ---- */
.company-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    padding: 0 24px 16px;
}

.company-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 20px;
}

.company-card h4 { font-size: 0.95rem; margin-bottom: 12px; }

.company-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.company-stats div { display: flex; flex-direction: column; gap: 2px; }
.stat-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-value { font-size: 1rem; font-weight: 600; }

/* ---- Items Sold Summary ---- */
.items-summary {
    padding: 0 24px 16px;
}

.items-summary h2 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--text);
}

.items-summary-list {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
}

.item-row:last-child {
    border-bottom: none;
}

.item-row:hover {
    background: rgba(99, 102, 241, 0.05);
}

.item-name {
    font-size: 0.95rem;
    color: var(--text);
}

.item-qty {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 60px;
    text-align: right;
}

/* ---- Product Table ---- */
.table-container { padding: 0 24px 24px; overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
}

thead th {
    background: var(--bg);
    padding: 12px 16px;
    text-align: left;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

tbody td {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}

tbody tr:hover { background: rgba(99, 102, 241, 0.05); }

.company-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.loading {
    text-align: center;
    color: var(--text-muted);
    padding: 40px !important;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    header { flex-direction: column; gap: 12px; }
    .controls { flex-direction: column; align-items: flex-start; }
    .summary-cards { grid-template-columns: 1fr 1fr; }
    .company-breakdown { grid-template-columns: 1fr; }
    .card span { font-size: 1.2rem; }
}

@media (max-width: 480px) {
    .summary-cards { grid-template-columns: 1fr; }
}