:root {
    --bg: #0f1115;
    --bg-alt: #14171d;
    --card: #1a1e26;
    --card-alt: #20242e;
    --text: #e8eaed;
    --muted: #9aa1ac;
    --primary: #3ecf8e;
    --primary-dark: #2fa872;
    --danger: #ef5350;
    --warning: #f5a623;
    --info: #4aa8f0;
    --border: #2a2f3a;
    --sidebar-width: 240px;
    --radius: 8px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
h1, h2, h3, h4 { margin: 0 0 12px 0; font-weight: 600; }
.muted { color: var(--muted); }

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform 0.25s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 22px 20px;
    font-size: 18px;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
}
.brand-icon { font-size: 24px; }

.sidebar-nav { display: flex; flex-direction: column; padding: 14px 10px; gap: 4px; }

.nav-link {
    color: var(--muted);
    padding: 11px 14px;
    border-radius: var(--radius);
    font-size: 14.5px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}
.nav-link:hover { background: var(--card-alt); color: var(--text); }
.nav-link.active { background: var(--primary); color: #06231a; }
.nav-logout { margin-top: auto; }

.sidebar-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 90;
}

.app-main {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 24px;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}
.page-title { font-size: 20px; flex: 1; }
.user-chip { font-size: 13px; color: var(--muted); }

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 32px; height: 32px;
    background: none; border: none; cursor: pointer;
}
.hamburger span { width: 100%; height: 2px; background: var(--text); border-radius: 2px; }

.page-content { padding: 22px 24px 60px; }

/* ---------- Cards ---------- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    width: 100%;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
}
.stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--muted); font-size: 13px; margin-top: 4px; }

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 18px;
}
.chart-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    min-height: 300px;
}
.chart-card-wide { grid-column: 1 / -1; }
.chart-card canvas { max-height: 260px; }

.two-col {
    display:flex;
    /* grid-template-columns: 380px 1fr; */
    flex-direction: column;
    gap: 20px;
    align-items: start;
}
@media (max-width: 900px) {
    /* .two-col { grid-template-columns: 1fr; } */
}

/* ---------- Forms ---------- */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 6px;
}
.form-group { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }
.form-group.inline { flex-direction: column; }
.form-group label { font-size: 13px; color: var(--muted); font-weight: 500; }

input[type=text], input[type=date], input[type=password], input[type=number], select, textarea {
    background: var(--card-alt);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 14.5px;
    width: 100%;
    outline: none;
    transition: border-color 0.15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }

.form-actions { display: flex; gap: 10px; margin-top: 6px; flex-wrap: wrap; }
.form-actions-split { justify-content: space-between; align-items: center; }

.filter-bar {
    display: flex;
    gap: 14px;
    align-items: flex-end;
    flex-wrap: wrap;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    margin-bottom: 20px;
}
.filter-card { padding-bottom: 8px; }
.search-inline { display: flex; gap: 8px; margin-bottom: 14px; }
.search-inline input { flex: 1; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: 6px;
    border: 1px solid transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.15s, background 0.15s;
}
.btn-primary { background: var(--primary); color: #06231a; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary { background: var(--card-alt); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: #262b36; }
.btn-large { padding: 13px 26px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

.btn-icon {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 5px;
    color: var(--text);
}
.btn-icon:hover { background: var(--card-alt); }
.btn-icon[disabled] { opacity: 0.3; cursor: not-allowed; }
.inline-form { display: inline; }

/* ---------- Tables ---------- */
.table-responsive { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 700px; }
.data-table th, .data-table td {
    padding: 11px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}
.data-table th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.03em; }
.data-table th a { color: var(--muted); }
.data-table tbody tr:hover { background: var(--card-alt); }
.empty-row { text-align: center; color: var(--muted); padding: 30px !important; }
.actions-cell { display: flex; gap: 4px; }

.results-summary { color: var(--muted); font-size: 13.5px; margin-bottom: 10px; }

/* ---------- Pagination ---------- */
.pagination { display: flex; gap: 6px; flex-wrap: wrap; margin: 18px 0; }
.page-btn {
    padding: 8px 13px;
    border-radius: 6px;
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 13.5px;
}
.page-btn.active { background: var(--primary); color: #06231a; border-color: var(--primary); }
.page-btn.disabled { opacity: 0.4; pointer-events: none; }

/* ---------- Alerts / Toasts ---------- */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
    border: 1px solid transparent;
}
.alert-success { background: rgba(62, 207, 142, 0.12); color: var(--primary); border-color: rgba(62, 207, 142, 0.35); }
.alert-danger { background: rgba(239, 83, 80, 0.12); color: var(--danger); border-color: rgba(239, 83, 80, 0.35); }
.alert-warning { background: rgba(245, 166, 35, 0.12); color: var(--warning); border-color: rgba(245, 166, 35, 0.35); }
.alert-info { background: rgba(74, 168, 240, 0.12); color: var(--info); border-color: rgba(74, 168, 240, 0.35); }

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.toast {
    background: var(--card-alt);
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    padding: 12px 16px;
    border-radius: 6px;
    box-shadow: var(--shadow);
    font-size: 14px;
    min-width: 220px;
    animation: toast-in 0.2s ease;
}
.toast.error { border-left-color: var(--danger); }
@keyframes toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ---------- Detail view ---------- */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 18px;
    margin-bottom: 20px;
}
.detail-label { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: 4px; }
.detail-value { font-size: 16px; font-weight: 500; }

/* ---------- Login ---------- */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(circle at top, #182028, var(--bg));
}
.login-wrap { width: 100%; max-width: 380px; padding: 20px; }
.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 34px 30px;
    box-shadow: var(--shadow);
}
.login-brand { text-align: center; margin-bottom: 24px; }
.login-brand .brand-icon { font-size: 40px; display: block; margin-bottom: 6px; }
.login-brand h1 { margin: 0; font-size: 22px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-backdrop.open { display: block; }
    .app-main { margin-left: 0; }
    .hamburger { display: flex; }
    .page-content { padding: 16px; }
    .filter-bar { flex-direction: column; align-items: stretch; }
}