:root {
    color-scheme: light;
    --bg: #f4f6f8;
    --card: #ffffff;
    --line: #e6e9ee;
    --text: #1f2933;
    --muted: #667085;
    --blue: #2f6fed;
    --green: #0f9f6e;
    --red: #dc2626;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
    font-family: "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
}

h1, h2, p { margin: 0; }

h1 { font-size: 1.4rem; font-weight: 650; }

h2 { font-size: 0.95rem; font-weight: 650; }

a { color: inherit; text-decoration: none; }

button, input, select {
    font: inherit;
    color: inherit;
}

button {
    border: 1px solid var(--line);
    background: var(--card);
    border-radius: 8px;
    padding: 0.45rem 0.75rem;
    cursor: pointer;
}

button.active, button[type="submit"] {
    background: var(--blue);
    border-color: var(--blue);
    color: white;
}

button.ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--line);
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 0.75rem 1.25rem;
    background: var(--card);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 2;
}

.brand { font-weight: 700; }

.topbar nav { display: flex; gap: 0.75rem; flex: 1; }

.topbar nav a { color: var(--muted); padding: 0.35rem 0.2rem; }

.topbar nav a.active { color: var(--text); box-shadow: inset 0 -2px 0 var(--blue); }

.page { padding: 1.25rem; display: grid; gap: 1rem; }

.heading, .card-head, .toolbar {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.heading p, .note, .hint, .empty { color: var(--muted); }

.toolbar, .chips { align-items: end; }

.toolbar label, .login-card label, .group {
    display: grid;
    gap: 0.25rem;
    font-size: 0.8rem;
    color: var(--muted);
}

.toolbar .grow { flex: 1; min-width: 12rem; }

input, select {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 0.45rem 0.6rem;
    background: white;
    min-width: 0;
}

.presets { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.chip {
    display: inline-flex;
    gap: 0.35rem;
    align-items: center;
    background: #e8f0fe;
    color: #1d4e89;
    border-radius: 999px;
    padding: 0.2rem 0.55rem;
    font-size: 0.85rem;
}

.chip button { border: 0; background: transparent; color: inherit; padding: 0 0.2rem; }

.banner {
    background: #fff4f4;
    color: #9f1239;
    border: 1px solid #fecdd3;
    border-radius: 10px;
    padding: 0.75rem 1rem;
}

.stats, .charts, .tops {
    display: grid;
    gap: 0.75rem;
}

.stats { grid-template-columns: repeat(6, minmax(0, 1fr)); }

.charts, .tops { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card, .stat, .login-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.stat { padding: 0.85rem 0.9rem 0.4rem; min-width: 0; }

.stat-label { color: var(--muted); font-size: 0.8rem; }

.stat-value { font-size: 1.45rem; font-weight: 700; margin-top: 0.2rem; }

.delta { font-size: 0.8rem; margin-top: 0.15rem; }

.delta.up { color: var(--green); }

.delta.down { color: var(--red); }

.delta.flat { color: var(--muted); }

.spark { width: 100%; height: 36px; }

.spark polyline { fill: none; stroke: var(--blue); stroke-width: 2; }

.card { padding: 0.9rem 1rem 1rem; }

.chart-card { min-height: 18rem; }

.top-row {
    display: grid;
    grid-template-columns: minmax(6rem, 1.2fr) minmax(4rem, 2fr) auto;
    gap: 0.6rem;
    align-items: center;
    margin-top: 0.55rem;
}

.top-label, .top-count, .path, .ua {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.top-count { color: var(--muted); font-variant-numeric: tabular-nums; }

.bar { height: 8px; background: #eef2f6; border-radius: 999px; overflow: hidden; }

.bar span { display: block; height: 100%; background: var(--blue); border-radius: inherit; }

.table-card { overflow: auto; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }

th, td { text-align: left; padding: 0.45rem 0.5rem; border-bottom: 1px solid var(--line); vertical-align: top; }

th { color: var(--muted); font-weight: 600; }

.path, .ua { max-width: 18rem; }

.login-card {
    width: min(28rem, calc(100% - 2rem));
    margin: 8vh auto;
    padding: 1.5rem;
    display: grid;
    gap: 0.8rem;
}

.login-card form { display: grid; gap: 0.75rem; }

.login-card input { width: 100%; }

@media (max-width: 1100px) {
    .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 800px) {
    .stats, .charts, .tops { grid-template-columns: 1fr; }
    .topbar { align-items: flex-start; flex-wrap: wrap; }
    .page { padding: 0.75rem; }
}