* { box-sizing: border-box; }
body { font-family: Inter, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin: 0; background: var(--bg); color: var(--text); }

/* Theme variables */
[data-theme='dark'] {
  --bg: #0b1220;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --muted-2: #64748b;
  --sidebar-bg: #0f172a;
  --panel-bg: #0b1220;
  --card-bg: linear-gradient(180deg, rgba(17,24,39,0.9), rgba(2,6,23,0.9));
  --border: #1f2937;
  --hover: #1f2937;
  --link: #cbd5e1;
  --btn-bg: #1f2937;
  --btn-border: #334155;
  --btn-hover: #111827;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #b91c1c;
  --danger-border: #991b1b;
  --thead-bg: #111827;
  --age1: #22c55e;
  --age2: #eab308;
  --age3: #f97316;
  --age4: #ef4444;
}

/* Logo contrast for dark theme */
[data-theme='dark'] .logo-img {
  filter: brightness(1.25) contrast(1.1) drop-shadow(0 1px 2px rgba(0,0,0,0.6));
}
[data-theme='light'] .logo-img {
  filter: none;
}

[data-theme='light'] {
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #334155;
  --muted-2: #64748b;
  --sidebar-bg: #ffffff;
  --panel-bg: #ffffff;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --hover: #eef2f7;
  --link: #334155;
  --btn-bg: #ffffff;
  --btn-border: #cbd5e1;
  --btn-hover: #f1f5f9;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #ef4444;
  --danger-border: #dc2626;
  --thead-bg: #f1f5f9;
  --age1: #16a34a;
  --age2: #ca8a04;
  --age3: #ea580c;
  --age4: #dc2626;
}

/* Layout */
.app { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.sidebar { background: var(--sidebar-bg); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 16px 12px; }
.sidebar-brand a { color: var(--text); font-weight: 800; text-decoration: none; font-size: 18px; letter-spacing: .02em; }
.sidebar-user { margin: 18px 4px; padding: 8px; border-radius: 8px; background: var(--hover); }
.sidebar-user .user-name { font-weight: 600; color: var(--text); }
.sidebar-user .user-role { font-size: 12px; color: var(--muted); }
.sidebar-nav { display: grid; gap: 6px; margin-top: 8px; }
.sidebar-nav a { color: var(--link); text-decoration: none; padding: 8px 10px; border-radius: 8px; display: flex; align-items: center; gap: 8px; }
.sidebar-nav a:hover { background: var(--hover); color: var(--text); }
.sidebar-nav .icon svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; display: block; }
.sidebar-footer { margin-top: auto; color: var(--muted-2); font-size: 12px; padding: 8px; }

.main { display: flex; flex-direction: column; }
.topbar { height: 56px; border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 20px; background: var(--panel-bg); position: sticky; top: 0; }
.topbar-title { font-weight: 700; color: var(--text); }

.container { padding: 20px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 20px; }
.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
.card .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.card .value { font-size: 26px; font-weight: 800; color: var(--text); }

/* Buttons */
.btn { display: inline-block; padding: 8px 12px; border-radius: 8px; background: var(--btn-bg); color: var(--text); text-decoration: none; border: 1px solid var(--btn-border); cursor: pointer; transition: .15s ease; }
.btn:hover { background: var(--btn-hover); }
.btn.primary { background: var(--primary); border-color: var(--primary-hover); color: white; }
.btn.primary:hover { background: var(--primary-hover); }
.btn.danger { background: var(--danger); border-color: var(--danger-border); color: white; }

/* Small variant for less-prominent actions to match other pages' spacing */
.btn.sm, .btn.small { padding: 6px 10px; font-size: 0.9rem; border-radius: 6px; }

.file-name { font-size: 0.9rem; color: var(--muted-2); margin-left: 6px; max-width: 220px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; vertical-align: middle; }

/* Tables */
table { width: 100%; border-collapse: collapse; background: var(--panel-bg); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; margin-top: 12px; }
th, td { padding: 12px; border-bottom: 1px solid var(--border); text-align: left; }
th { background: var(--thead-bg); color: var(--link); font-weight: 700; letter-spacing: .02em; }
tbody tr:hover { background: var(--hover); }

/* Forms */
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; max-width: 900px; }
label { display: block; font-size: 13px; color: var(--link); }
input, select { width: 100%; padding: 10px; border: 1px solid var(--btn-border); border-radius: 8px; margin-top: 6px; background: var(--panel-bg); color: var(--text); }
input::placeholder { color: var(--muted-2); }
.actions { margin-top: 14px; }

/* Flash */
.flash-container { padding: 10px 20px; }
.flash { padding: 10px; border-radius: 8px; margin-bottom: 8px; border: 1px solid transparent; }
.flash.success { background: rgba(22, 101, 52, 0.15); color: #166534; border-color: rgba(22,101,52,0.3); }
.flash.info { background: rgba(7, 89, 133, 0.15); color: #075985; border-color: rgba(7,89,133,0.3); }
.flash.danger { background: rgba(239, 68, 68, 0.15); color: #b91c1c; border-color: rgba(239,68,68,0.3); }

/* Header rows */
.header-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }

/* Header actions used for list pages */
.header-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* Import form styling: hide native file input and style choose file label */
.import-form { display: inline-flex; gap: 8px; align-items: center; margin: 0; }
.import-form .file-btn { position: relative; overflow: hidden; }
.import-form .file-btn input[type=file] { position: absolute; left: 0; top: 0; opacity: 0; width: 100%; height: 100%; cursor: pointer; }
.file-btn { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--btn-border); background: var(--btn-bg); color: var(--text); display: inline-block; }
.file-btn:hover { background: var(--btn-hover); }

.import-note { margin-top: 6px; font-size: 0.9rem; color: var(--muted); }

/* Inventory filters horizontal row */
.filters-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.filters-row label { min-width: 220px; }
.filters-row .actions { display: flex; gap: 8px; }

/* Ageing chart */
.ageing-chart { max-width: 760px; }
.ageing-bar { display: flex; height: 14px; background: var(--hover); border-radius: 7px; overflow: hidden; }
.ageing-bar .age-seg { height: 100%; }