@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #0c0e14;
  --surface: #12141e;
  --card: #181b28;
  --card-hover: #1e2132;
  --border: #262a3a;
  --border-light: #1e2230;
  --text: #e8eaf0;
  --text-muted: #7a7f94;
  --text-dim: #4a4e62;
  --gold: #f0b90b;
  --gold-hover: #d4a308;
  --gold-dim: rgba(240, 185, 11, 0.12);
  --green: #22c55e;
  --green-dim: rgba(34, 197, 94, 0.12);
  --red: #ef4444;
  --red-dim: rgba(239, 68, 68, 0.12);
  --orange: #f59e0b;
  --orange-dim: rgba(245, 158, 11, 0.12);
  --blue: #3b82f6;
  --blue-dim: rgba(59, 130, 246, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ─── Top Bar ─── */
.top-bar {
  display: flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}
.top-bar .logo { font-weight: 700; color: var(--gold); font-size: 1.05rem; letter-spacing: -0.02em; }
.top-bar .nav { display: flex; gap: 0.25rem; margin-left: auto; }
.top-bar .nav a {
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition);
}
.top-bar .nav a:hover { color: var(--text); background: var(--card); }
.top-bar .nav a.active { color: var(--gold); background: var(--gold-dim); }

/* ─── Layout ─── */
.container { max-width: 1280px; margin: 0 auto; padding: 1.5rem; }

/* ─── Stats ─── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 0.75rem;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { border-color: var(--text-dim); }
.stat-card .value { font-size: 1.6rem; font-weight: 700; line-height: 1.2; }
.stat-card .label { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.2rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-card .value.gold { color: var(--gold); }
.stat-card .value.green { color: var(--green); }
.stat-card .value.orange { color: var(--orange); }
.stat-card .value.red { color: var(--red); }

/* ─── Alerts ─── */
.alerts { margin-bottom: 1.25rem; display: flex; flex-direction: column; gap: 0.3rem; }
.alert-item {
  display: flex;
  align-items: center;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid;
  font-size: 0.82rem;
  gap: 0.5rem;
}
.alert-item.warn { background: var(--orange-dim); border-color: var(--orange); }
.alert-item.danger { background: var(--red-dim); border-color: var(--red); }
.alert-item.info { background: var(--blue-dim); border-color: var(--blue); }
.alert-item .msg { flex: 1; }
.alert-item .action { color: var(--blue); cursor: pointer; font-size: 0.78rem; font-weight: 500; }

/* ─── Controls ─── */
.controls {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  align-items: center;
}
.controls input, .controls select {
  padding: 0.45rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 0.82rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.controls input:focus, .controls select:focus { outline: none; border-color: var(--gold); }
.controls input[type="search"] { flex: 1; min-width: 200px; }

/* ─── Buttons ─── */
.btn {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  font-size: 0.82rem;
  font-family: inherit;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn:hover { border-color: var(--text-dim); background: var(--card-hover); }
.btn-gold { background: var(--gold-dim); border-color: var(--gold); color: var(--gold); }
.btn-gold:hover { background: rgba(240,185,11,0.2); }
.btn-red { background: var(--red-dim); border-color: var(--red); color: var(--red); }
.btn-red:hover { background: rgba(239,68,68,0.2); }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text-muted); }
.btn-outline:hover { color: var(--text); border-color: var(--text-dim); }
.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.75rem; }

/* ─── Table ─── */
.table-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
}
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: rgba(255,255,255,0.02);
  white-space: nowrap;
}
td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }
th[onclick] { cursor: pointer; user-select: none; }
th[onclick]:hover { color: var(--gold); }

td.stock-low { color: var(--orange); font-weight: 600; }
td.stock-out { color: var(--red); font-weight: 600; }
td.stock-ok { color: var(--green); }
td.abc-a { color: var(--gold); font-weight: 700; }
td.abc-b { color: var(--blue); font-weight: 600; }
td.abc-c { color: var(--text-dim); }
.abc-badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}
.abc-badge.A { background: var(--gold); color: #000; }
.abc-badge.B { background: var(--blue); color: #fff; }
.abc-badge.C { background: #444; color: var(--text-muted); }
td.gold-text { color: var(--gold); font-weight: 600; }
td.green-text { color: var(--green); font-weight: 600; }
td.red-text { color: var(--red); font-weight: 600; }

/* ─── Tabs ─── */
.analytics-tabs {
  display: flex;
  gap: 0.3rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 0.4rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: inherit;
  font-weight: 500;
  transition: all var(--transition);
}
.tab-btn:hover { border-color: var(--text-dim); color: var(--text); }
.tab-btn.active { border-color: var(--gold); color: var(--gold); background: var(--gold-dim); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ─── Chart Containers ─── */
.chart-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

/* ─── Velocity ─── */
.vel-item { margin-bottom: 0.6rem; }
.vel-info { display: flex; justify-content: space-between; margin-bottom: 0.2rem; font-size: 0.82rem; }
.vel-num { color: var(--gold); font-weight: 600; }
.vel-bar-bg { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
.vel-bar { height: 100%; background: linear-gradient(90deg, var(--gold), #facc15); border-radius: 3px; transition: width 0.4s ease; }

/* ─── ABC Cards ─── */
.abc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin-bottom: 1rem; }
.abc-card {
  border-radius: var(--radius);
  padding: 1.25rem;
  border: 1px solid var(--border);
  background: var(--card);
  text-align: center;
}
.abc-a-card { border-color: var(--gold); }
.abc-b-card { border-color: var(--blue); }
.abc-c-card { border-color: var(--text-dim); }
.abc-letter { font-size: 2.2rem; font-weight: 800; margin-bottom: 0.15rem; line-height: 1; }
.abc-a-card .abc-letter { color: var(--gold); }
.abc-b-card .abc-letter { color: var(--blue); }
.abc-c-card .abc-letter { color: var(--text-dim); }
.abc-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.35rem; }
.abc-stat { font-size: 0.85rem; color: var(--text-muted); }
.abc-desc { font-size: 0.75rem; color: var(--text-dim); margin-top: 0.35rem; }

/* ─── Expiry ─── */
.expiry-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0.6rem; margin-bottom: 1rem; }
.expiry-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  text-align: center;
}
.expiry-card .expiry-num { font-size: 1.4rem; font-weight: 700; display: block; }
.expiry-card span:last-child { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.1rem; display: block; }
.expiry-urgent { border-color: var(--red); }
.expiry-urgent .expiry-num { color: var(--red); }
.expiry-warn { border-color: var(--orange); }
.expiry-warn .expiry-num { color: var(--orange); }
.expiry-expired { border-color: var(--text-dim); }
.expiry-expired .expiry-num { color: var(--text-dim); }
.expiry-days { font-weight: 600; }
.expiring-row { background: rgba(245,158,11,0.06); }
.expired-row { background: rgba(239,68,68,0.06); }

/* ─── Margin ─── */
.margin-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0.75rem; margin-bottom: 1rem; }
.margin-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem; text-align: center; }
.margin-card .margin-num { font-size: 1.6rem; font-weight: 700; }
.margin-high { color: var(--green); font-weight: 600; }
.margin-med { color: var(--gold); font-weight: 600; }
.margin-low { color: var(--red); font-weight: 600; }

/* ─── Forecast ─── */
.forecast-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0.6rem; }
.forecast-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.75rem; }
.forecast-card .fc-name { font-weight: 600; font-size: 0.85rem; margin-bottom: 0.25rem; }
.forecast-card .fc-detail { font-size: 0.75rem; color: var(--text-muted); }
.forecast-card .fc-val { color: var(--gold); font-weight: 600; }

/* ─── Modal ─── */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 520px;
  width: 92%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.96) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal h2 { font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 1rem; }
.modal h3 { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: 0.75rem; }

.form-group { margin-bottom: 0.7rem; }
.form-group label { display: block; margin-bottom: 0.25rem; color: var(--text-muted); font-size: 0.78rem; font-weight: 500; }
.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.form-input:focus { outline: none; border-color: var(--gold); }
.form-input::placeholder { color: var(--text-dim); }
select.form-input { cursor: pointer; }
textarea.form-input { resize: vertical; min-height: 60px; }

.form-actions { display: flex; gap: 0.5rem; margin-top: 1rem; justify-content: flex-end; }

/* ─── Empty State ─── */
.empty { text-align: center; color: var(--text-dim); padding: 2.5rem; font-size: 0.85rem; }
.empty .icon { font-size: 2.2rem; margin-bottom: 0.35rem; opacity: 0.5; }

/* ─── Footer ─── */
footer {
  text-align: center;
  padding: 1rem;
  color: var(--text-dim);
  font-size: 0.72rem;
  border-top: 1px solid var(--border);
  margin-top: 1.5rem;
}
footer a { color: var(--blue); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ─── Supplier/Render helpers ─── */
.customer-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.75rem; margin-bottom: 1rem; }
.supplier-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.6rem; }
.supplier-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.85rem; }
.supplier-card .sc-name { font-weight: 600; font-size: 0.9rem; margin-bottom: 0.3rem; }
.supplier-card .sc-detail { font-size: 0.78rem; color: var(--text-muted); }
.supplier-card .sc-actions { margin-top: 0.5rem; display: flex; gap: 0.3rem; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .container { padding: 0.75rem; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .stat-card { padding: 0.6rem; }
  .stat-card .value { font-size: 1.2rem; }
  .controls { flex-direction: column; }
  .controls input[type="search"] { min-width: auto; width: 100%; }
  .abc-grid { grid-template-columns: 1fr; }
  .top-bar { padding: 0.45rem 0.75rem; }
  .analytics-tabs { gap: 0.2rem; }
  .tab-btn { padding: 0.3rem 0.6rem; font-size: 0.72rem; }
}