/* ── Dark Theme ── */
:root {
    --bg:        #0f1117;
    --bg2:       #1a1d27;
    --bg3:       #22263a;
    --border:    #2e3248;
    --text:      #e2e8f0;
    --text-muted:#8892a4;
    --primary:   #4f8ef7;
    --primary-h: #3a7ae0;
    --success:   #2ecc71;
    --danger:    #e74c3c;
    --warning:   #f39c12;
    --purple:    #8e44ad;
}

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

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

/* ── Header ── */
.header {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    display: flex; justify-content: space-between; align-items: center;
    height: 60px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.header h1 { font-size: 20px; font-weight: 600; color: var(--text); }

/* ── Nav ── */
.nav { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.nav a, .dropdown-btn, .logout, .back {
    padding: 7px 14px; border-radius: 6px; font-size: 13px;
    font-weight: 500; cursor: pointer; border: none;
    text-decoration: none; transition: opacity .15s;
    display: inline-block;
}
.nav a, .back        { background: var(--primary); color: #fff; }
.nav a:hover, .back:hover { background: var(--primary-h); }
.dropdown-btn        { background: var(--purple); color: #fff; }
.dropdown-btn:hover  { opacity: .85; }
.logout              { background: var(--danger); color: #fff; }
.logout:hover        { opacity: .85; }

.dropdown { position: relative; }
.dropdown-menu {
    display: none; position: absolute; right: 0; top: calc(100% + 6px);
    background: var(--bg3); border: 1px solid var(--border);
    border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    min-width: 170px; z-index: 50; overflow: hidden;
}
.dropdown-menu a {
    display: flex; align-items: center; gap: 8px;
    padding: 11px 16px; color: var(--text); text-decoration: none; font-size: 14px;
}
.dropdown-menu a:hover { background: var(--border); }
.dropdown:hover .dropdown-menu { display: block; }

/* ── Layout ── */
.container { max-width: 1280px; margin: 24px auto; padding: 0 24px; }

/* ── Cards / Panels / Sections ── */
.card, .section, .panel {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    margin-bottom: 20px;
}
.section h2, .panel h2 { color: var(--text); font-size: 16px; margin-bottom: 14px; }

/* ── KPI ── */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 16px; margin-bottom: 24px; }
.kpi {
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: 12px; padding: 20px 24px;
    display: flex; align-items: center; gap: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.kpi-icon { font-size: 30px; }
.kpi-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .6px; margin-bottom: 4px; }
.kpi-value { font-size: 26px; font-weight: 700; color: var(--text); }

/* ── Grid ── */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media(max-width:800px) { .grid2 { grid-template-columns: 1fr; } }

/* ── Panel header ── */
.panel-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 14px; padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}
.panel-header h2 { font-size: 15px; font-weight: 600; }
.panel-header a { font-size: 12px; color: var(--primary); text-decoration: none; font-weight: 500; }
.panel-header a:hover { text-decoration: underline; }

/* ── Tables ── */
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--border); }
table th { background: var(--bg3); color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; font-weight: 600; }
table td { color: var(--text); }
table tr:hover td { background: var(--bg3); }

.mini-table th { color: var(--text-muted); font-size: 11px; padding: 0 8px 8px; }
.mini-table td { padding: 8px; border-top: 1px solid var(--border); border-bottom: none; }
.mini-table tr:hover td { background: var(--bg3); }

/* ── Forms ── */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 5px; font-weight: 500; font-size: 14px; color: var(--text-muted); }
.form-group input,
.form-group select,
input[type="text"], input[type="email"], input[type="number"], input[type="date"], input[type="password"],
select {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 14px;
    width: 100%;
}
.form-group input:focus, .form-group select:focus,
input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,142,247,.15);
}
input::placeholder { color: var(--text-muted); }

/* ── Buttons ── */
.btn {
    padding: 8px 16px; border: none; border-radius: 6px;
    cursor: pointer; font-size: 14px; font-weight: 500;
    transition: opacity .15s;
}
.btn:hover { opacity: .85; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-sm      { padding: 4px 10px; font-size: 13px; }

/* ── Badges ── */
.badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-green  { background: rgba(46,204,113,.15); color: #2ecc71; }
.badge-orange { background: rgba(243,156,18,.15);  color: #f39c12; }
.badge-red    { background: rgba(231,76,60,.15);   color: #e74c3c; }

/* ── Misc ── */
.hidden  { display: none !important; }
.loading { text-align: center; padding: 40px; color: var(--text-muted); }
.empty   { color: var(--text-muted); font-size: 13px; text-align: center; padding: 20px 0; }
.message { padding: 10px; border-radius: 6px; margin-bottom: 15px; }
.success { background: rgba(46,204,113,.15); color: #2ecc71; border: 1px solid rgba(46,204,113,.3); }
.error   { background: rgba(231,76,60,.15);  color: #e74c3c;  border: 1px solid rgba(231,76,60,.3); }

/* ── Item rows (purchases/sales forms) ── */
.item-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.item-row select, .item-row input { flex: 1; }
#itemsArea { border: 1px solid var(--border); border-radius: 6px; padding: 10px; margin-bottom: 10px; background: var(--bg3); }

/* ── Modal overlay ── */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,.7); z-index: 100;
    display: flex; align-items: center; justify-content: center;
}
.modal-box {
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: 12px; padding: 24px; min-width: 500px; max-width: 700px;
    box-shadow: 0 16px 48px rgba(0,0,0,.6);
}
.modal-box h2 { margin-bottom: 16px; font-size: 18px; }

/* ── Login page ── */
.login-wrap {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: var(--bg);
}
.login-box {
    background: var(--bg2); border: 1px solid var(--border);
    border-radius: 16px; padding: 40px; width: 380px;
    box-shadow: 0 16px 48px rgba(0,0,0,.5);
}
.login-box h1 { text-align: center; margin-bottom: 28px; font-size: 22px; }

/* Clickable KPI cards */
a.kpi { transition: border-color .15s, transform .15s; }
a.kpi:hover { border-color: var(--primary); transform: translateY(-2px); }