:root {
    --bg: #f4f6fb;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #0f766e;
    --primary-600: #0d9488;
    --primary-50: #ecfdf5;
    --danger: #dc2626;
    --danger-50: #fef2f2;
    --warning: #d97706;
    --warning-50: #fffbeb;
    --success: #16a34a;
    --success-50: #f0fdf4;
    --info: #2563eb;
    --info-50: #eff6ff;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);
    --sidebar-w: 250px;
}

* { box-sizing: border-box; }

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

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

h1, h2, h3 { margin: 0 0 .5rem; line-height: 1.25; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1rem; }

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

.sidebar {
    width: var(--sidebar-w);
    background: #0f172a;
    color: #cbd5e1;
    padding: 1rem .75rem;
    position: fixed;
    inset: 0 auto 0 0;
    overflow-y: auto;
    z-index: 40;
    transition: transform .2s ease;
}
.sidebar .brand {
    display: flex; align-items: center; gap: .5rem;
    padding: .5rem .5rem 1rem;
    color: #fff; font-weight: 700; font-size: 1.05rem;
}
.sidebar .brand .dot { width: 10px; height: 10px; border-radius: 50%; background: #25d366; box-shadow: 0 0 0 4px rgba(37,211,102,.18); }
.sidebar nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar .nav-group { margin-top: .9rem; padding: 0 .5rem; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: #64748b; }
.sidebar a {
    display: flex; align-items: center; gap: .55rem;
    padding: .55rem .6rem; border-radius: 8px; color: #cbd5e1; font-size: .92rem;
}
.sidebar a:hover { background: #1e293b; text-decoration: none; color: #fff; }
.sidebar a.active { background: var(--primary); color: #fff; }

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

.topbar {
    height: 60px; background: var(--surface); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 1.25rem; position: sticky; top: 0; z-index: 30;
}
.topbar .menu-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 8px; padding: .4rem .6rem; cursor: pointer; }
.topbar .user { display: flex; align-items: center; gap: .75rem; color: var(--muted); font-size: .9rem; }

.content { padding: 1.5rem; max-width: 1200px; width: 100%; }

.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 1.25rem; margin-bottom: 1.25rem;
}
.card > h2 { margin-bottom: 1rem; }

.grid { display: grid; gap: 1rem; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.1rem; box-shadow: var(--shadow); }
.stat .label { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 1.7rem; font-weight: 700; margin-top: .25rem; }
.stat .hint { color: var(--muted); font-size: .78rem; }

.form-group { margin-bottom: 1rem; }
label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: .88rem; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], input[type=date], select, textarea {
    width: 100%; padding: .6rem .7rem; border: 1px solid var(--border); border-radius: 8px;
    background: #fff; font: inherit; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary-50); border-color: var(--primary-600); }
.form-hint { color: var(--muted); font-size: .8rem; margin-top: .3rem; }
.form-row { display: grid; gap: 1rem; grid-template-columns: repeat(2, minmax(0,1fr)); }

.btn {
    display: inline-flex; align-items: center; gap: .4rem; border: 1px solid transparent;
    background: var(--primary); color: #fff; padding: .55rem .95rem; border-radius: 8px;
    font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--primary-600); text-decoration: none; color: #fff; }
.btn.secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn.secondary:hover { background: var(--surface-2); }
.btn.danger { background: var(--danger); }
.btn.danger:hover { background: #b91c1c; }
.btn.warning { background: var(--warning); }
.btn.sm { padding: .3rem .6rem; font-size: .82rem; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .65rem .6rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .04em; background: var(--surface-2); }
tbody tr:hover { background: var(--surface-2); }
.table-wrap { overflow-x: auto; }

.badge { display: inline-block; padding: .18rem .55rem; border-radius: 999px; font-size: .74rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; }
.badge.gray { background: #e2e8f0; color: #334155; }
.badge.green { background: var(--success-50); color: var(--success); }
.badge.red { background: var(--danger-50); color: var(--danger); }
.badge.yellow { background: var(--warning-50); color: var(--warning); }
.badge.blue { background: var(--info-50); color: var(--info); }
.badge.teal { background: var(--primary-50); color: var(--primary); }

.alert { padding: .8rem 1rem; border-radius: 10px; margin-bottom: 1rem; border: 1px solid; font-size: .9rem; }
.alert.success { background: var(--success-50); border-color: #bbf7d0; color: #166534; }
.alert.danger { background: var(--danger-50); border-color: #fecaca; color: #991b1b; }
.alert.warning { background: var(--warning-50); border-color: #fde68a; color: #92400e; }
.alert.info { background: var(--info-50); border-color: #bfdbfe; color: #1e40af; }
.alert ul { margin: .3rem 0 0; padding-left: 1.1rem; }

.muted { color: var(--muted); }
.small { font-size: .82rem; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .84rem; }
.nowrap { white-space: nowrap; }
.mt-1 { margin-top: .5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: .5rem; } .mb-2 { margin-bottom: 1rem; }
.flex { display: flex; } .between { justify-content: space-between; } .center { align-items: center; }
.gap { gap: .6rem; } .wrap { flex-wrap: wrap; }
.text-right { text-align: right; }

.pagination { display: flex; gap: .35rem; margin-top: 1rem; flex-wrap: wrap; }
.pagination a, .pagination span { padding: .35rem .65rem; border: 1px solid var(--border); border-radius: 8px; background: #fff; font-size: .85rem; }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

.bar-chart { display: flex; align-items: flex-end; gap: 6px; height: 140px; padding-top: .5rem; }
.bar-chart .bar { flex: 1; background: linear-gradient(180deg, var(--primary-600), var(--primary)); border-radius: 6px 6px 0 0; min-height: 3px; position: relative; }
.bar-chart .bar span { position: absolute; bottom: -20px; left: 0; right: 0; text-align: center; font-size: .65rem; color: var(--muted); }

.preview-box { background: #e5ddd5; border-radius: 12px; padding: 1rem; }
.preview-bubble { background: #fff; border-radius: 10px; padding: .8rem; max-width: 380px; box-shadow: var(--shadow); white-space: pre-wrap; }
.preview-bubble .footer { color: var(--muted); font-size: .78rem; margin-top: .5rem; }

.progress { height: 8px; background: #e2e8f0; border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--primary); }

.checkbox-list { max-height: 320px; overflow-y: auto; border: 1px solid var(--border); border-radius: 10px; padding: .5rem; }
.checkbox-list label { display: flex; align-items: center; gap: .5rem; font-weight: 400; margin: 0; padding: .3rem .25rem; border-radius: 6px; }
.checkbox-list label:hover { background: var(--surface-2); }

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1.5rem; }
.login-card { width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 2rem; }
.login-card .brand { text-align: center; margin-bottom: 1.5rem; }

.steps { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.steps .step { display: flex; align-items: center; gap: .4rem; font-size: .85rem; color: var(--muted); }
.steps .step.done { color: var(--success); }
.steps .step.fail { color: var(--danger); }

.sidebar-backdrop { display: none; position: fixed; inset: 0; background: rgba(15,23,42,.45); z-index: 35; }

@media (max-width: 960px) {
    .grid.cols-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid.cols-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

@media (max-width: 760px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main { margin-left: 0; }
    .topbar .menu-toggle { display: inline-flex; }
    .sidebar-backdrop.show { display: block; }
    .grid.cols-2, .grid.cols-3, .grid.cols-4, .form-row { grid-template-columns: 1fr; }
    .content { padding: 1rem; }
}