:root {
    color-scheme: dark;
    --bg-color: #0f172a;
    --bg-elevated: #16213a;
    --bg-card: #1f2a44;
    --border-color: #2d3a5a;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --danger: #f97316;
    --success: #22c55e;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --shadow: 0 8px 20px rgba(15, 23, 42, 0.35);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top, #15213b 0%, var(--bg-color) 45%);
    color: var(--text-primary);
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(56, 189, 248, 0.1);
}

.nav-brand {
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links a {
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    color: var(--text-secondary);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-links a.active,
.nav-links a:hover {
    background-color: rgba(56, 189, 248, 0.14);
    color: var(--accent);
}

.nav-links .logout-link {
    border: 1px solid rgba(248, 113, 113, 0.35);
    color: #f87171;
}

.nav-links .logout-link:hover {
    background-color: rgba(248, 113, 113, 0.18);
    color: #fca5a5;
}

.main-content {
    padding: 2rem;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card {
    background: linear-gradient(145deg, rgba(31, 41, 75, 0.9), rgba(15, 23, 42, 0.85));
    border: 1px solid rgba(56, 189, 248, 0.08);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.kpi h2 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin: 0 0 0.5rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.kpi-value {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    margin: 0;
}

.top-sites {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.top-sites li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(148, 163, 184, 0.12);
    padding: 0.5rem 0.75rem;
    border-radius: 12px;
}

.badge {
    background-color: rgba(56, 189, 248, 0.2);
    color: var(--accent);
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-weight: 600;
}

.btn,
.btn-secondary {
    display: inline-block;
    padding: 0.55rem 1.1rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #04101b;
}

.btn:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, var(--accent-hover), #0284c7);
}

.btn-secondary {
    background-color: rgba(148, 163, 184, 0.2);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: rgba(148, 163, 184, 0.3);
}

.btn-small {
    display: inline-block;
    padding: 0.35rem 0.7rem;
    border-radius: 10px;
    background-color: rgba(56, 189, 248, 0.18);
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 0.5rem;
}

.btn-small:hover {
    background-color: rgba(14, 165, 233, 0.45);
}

.btn-danger,
.btn-small.btn-danger {
    background-color: rgba(249, 115, 22, 0.18);
    color: var(--danger);
    border: 1px solid rgba(249, 115, 22, 0.35);
}

.btn-danger:hover,
.btn-small.btn-danger:hover {
    background-color: rgba(249, 115, 22, 0.35);
    color: #fb923c;
    transform: translateY(-1px);
}

input,
textarea,
select {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    background-color: rgba(15, 23, 42, 0.6);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: rgba(56, 189, 248, 0.55);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.form-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.form-inline input[type="text"],
.form-inline input[type="date"] {
    flex: 1 1 220px;
    margin-bottom: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: rgba(15, 23, 42, 0.4);
    border-radius: 16px;
    overflow: hidden;
}

th,
td {
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
    text-align: left;
}

th {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

tbody tr:hover {
    background-color: rgba(56, 189, 248, 0.08);
}

.table-responsive {
    overflow-x: auto;
}

.empty {
    color: var(--text-secondary);
    font-style: italic;
}

.code-block {
    background-color: rgba(15, 23, 42, 0.75);
    border-radius: 12px;
    padding: 0.85rem;
    border: 1px solid rgba(56, 189, 248, 0.12);
    overflow-x: auto;
    font-family: "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.85rem;
}

.flash-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-weight: 600;
}

.alert-success {
    background-color: rgba(34, 197, 94, 0.18);
    color: var(--success);
}

.alert-error {
    background-color: rgba(249, 115, 22, 0.18);
    color: var(--danger);
}

.help-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    cursor: pointer;
}

.checkbox input {
    width: auto;
    margin: 0;
}

.login-container,
.page-install .container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-container .card,
.page-install .card {
    max-width: 420px;
    width: 100%;
    text-align: center;
}

.page-install .container {
    flex-direction: column;
    gap: 1.5rem;
}

ul {
    margin: 0;
    padding-left: 1.25rem;
}

pre {
    white-space: pre-wrap;
}

@media (max-width: 768px) {
    .top-nav {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .nav-links {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .main-content {
        padding: 1.25rem;
    }
}