:root {
    --primary: #0F3D34;
    --primary-dark: #072822;
    --primary-light: #1a5d4f;
    --accent: #E08A2B;
    --accent-dark: #B5691C;
    --success: #059669;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #DC2626;
    --danger-light: #FEE2E2;

    --bg: #F7F5F0;
    --surface: #FFFFFF;
    --surface-alt: #F0EEE7;
    --border: #E4E0D4;
    --border-strong: #C9C3B0;
    --text: #0F1F1A;
    --text-muted: #6B7570;
    --text-light: #9BA39D;

    --sidebar-width: 240px;
    --topbar-height: 56px;
    --radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow: 0 2px 6px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--primary);
    color: white;
    padding: 16px 0;
    position: sticky;
    top: 0;
    height: 100vh;
}
.sidebar-brand {
    padding: 0 20px 16px;
    font-weight: 800;
    font-size: 18px;
    letter-spacing: 0.5px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 12px;
}
.sidebar nav { display: flex; flex-direction: column; }
.sidebar nav a {
    color: rgba(255,255,255,0.85);
    padding: 10px 20px;
    font-size: 13px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.07); text-decoration: none; }
.sidebar nav a.active { background: rgba(255,255,255,0.12); color: white; font-weight: 600; }
.sidebar nav .badge {
    background: var(--accent);
    color: white;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 700;
}

.main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar h1 { margin: 0; font-size: 16px; font-weight: 700; }
.topbar .actions { display: flex; align-items: center; gap: 12px; }
.topbar .user { font-size: 13px; color: var(--text-muted); }

.content { padding: 24px; max-width: 1400px; width: 100%; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 16px;
}
.card h2 { margin: 0 0 12px; font-size: 14px; font-weight: 700; color: var(--text); }

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}
.kpi {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow-sm);
}
.kpi-label {
    text-transform: uppercase;
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    font-weight: 700;
}
.kpi-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    margin-top: 6px;
}
.kpi-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}
.kpi.danger .kpi-value { color: var(--danger); }
.kpi.success .kpi-value { color: var(--success); }
.kpi.warning .kpi-value { color: var(--accent-dark); }

table.list {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
table.list th, table.list td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}
table.list th {
    background: var(--surface-alt);
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.4px;
}
table.list tr:last-child td { border-bottom: none; }
table.list tr:hover { background: #FAFAF7; }
table.list td.num { text-align: right; font-variant-numeric: tabular-nums; }

.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    background: var(--surface-alt);
    color: var(--text-muted);
}
.badge.success { background: var(--success-light); color: var(--success); }
.badge.warn { background: var(--warning-light); color: var(--accent-dark); }
.badge.danger { background: var(--danger-light); color: var(--danger); }
.badge.info { background: #DBEAFE; color: #1D4ED8; }

.btn {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 9px 16px;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--primary-dark); color: white; text-decoration: none; }
.btn.secondary { background: white; color: var(--primary); border: 1px solid var(--border-strong); }
.btn.accent { background: var(--accent); }
.btn.danger { background: var(--danger); }

.formula {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 13px;
    background: var(--surface-alt);
    padding: 12px 14px;
    border-radius: 10px;
    color: var(--text-muted);
    line-height: 1.9;
}
.formula .op { color: var(--text); font-weight: 700; }
.formula .total { color: var(--primary); font-weight: 800; }

.flash {
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 12px;
    font-size: 13px;
}
.flash.success { background: var(--success-light); color: var(--success); }
.flash.error { background: var(--danger-light); color: var(--danger); }
.flash.warning { background: var(--warning-light); color: var(--accent-dark); }

/* Login */
.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}
.login-card {
    background: white;
    border-radius: 16px;
    padding: 32px;
    width: 360px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}
.login-card h1 { margin: 0 0 24px; font-size: 22px; color: var(--primary); }
.login-card label { display: block; margin-top: 12px; font-size: 13px; color: var(--text-muted); }
.login-card input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    margin-top: 6px;
}
.login-card input:focus { outline: none; border-color: var(--primary); }
.login-card .btn { width: 100%; margin-top: 20px; padding: 12px; }