* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(900px 420px at 8% -20%, rgba(37, 99, 235, 0.12), transparent),
        radial-gradient(760px 420px at 95% -20%, rgba(59, 130, 246, 0.1), transparent),
        linear-gradient(180deg, #f8fbff 0%, #f1f6ff 100%);
    color: #0f172a;
}

.admin-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    min-height: 100vh;
}

.admin-sidebar {
    background: linear-gradient(180deg, #0f172a 0%, #13284d 100%);
    color: #dbe7ff;
    padding: 20px 14px;
    box-shadow: inset -1px 0 0 rgba(148, 163, 184, 0.22);
}

.admin-brand {
    color: #fff;
    text-decoration: none;
    font-size: 22px;
    font-weight: 800;
    display: block;
    margin-bottom: 18px;
}

.admin-nav {
    display: grid;
    gap: 8px;
}

.admin-nav a {
    text-decoration: none;
    color: #cbd5e1;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    transition: background-color .15s ease, color .15s ease, transform .15s ease;
}

.admin-nav a.active,
.admin-nav a:hover {
    color: #fff;
    background: rgba(59, 130, 246, 0.28);
    transform: translateX(2px);
}

.admin-main {
    padding: 22px;
}

.admin-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.admin-head h1 {
    margin: 0;
    font-size: 28px;
}

.card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #dce7f8;
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 14px;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
    backdrop-filter: blur(3px);
}

.grid {
    display: grid;
    gap: 12px;
}

.grid.four {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.metric-card span {
    color: #64748b;
    font-size: 13px;
}

.metric-card strong {
    display: block;
    margin-top: 8px;
    font-size: 24px;
}

.muted {
    color: #64748b;
    font-size: 13px;
}

.alert {
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 12px;
}

.alert.success {
    background: #f0fdf4;
    border-color: #86efac;
}

.alert.error {
    background: #fef2f2;
    border-color: #fca5a5;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
}

input,
select,
textarea,
button {
    width: 100%;
    margin-top: 6px;
    border: 1px solid #c6d4ed;
    border-radius: 10px;
    font-size: 14px;
    padding: 9px;
}

button {
    border: 0;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    color: #fff;
    font-weight: 700;
    cursor: pointer;
    transition: transform .15s ease, box-shadow .15s ease;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 16px rgba(37, 99, 235, 0.28);
}

.danger-btn {
    background: #dc2626;
}

.inline-form {
    display: flex;
    gap: 8px;
    align-items: center;
}

.inline-form select {
    margin-top: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th,
td {
    border-bottom: 1px solid #e5ebf4;
    text-align: left;
    padding: 9px 8px;
    vertical-align: top;
}

.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.actions form {
    margin: 0;
}

.actions form button {
    width: auto;
    margin-top: 0;
}

.link-btn {
    text-decoration: none;
    border: 1px solid #ccddf6;
    color: #1e3a8a;
    background: #f8fbff;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    transition: all .15s ease;
}

.link-btn:hover {
    transform: translateY(-1px);
    border-color: #c4d5ee;
    box-shadow: 0 8px 14px rgba(15, 23, 42, 0.08);
}

.settings-wrap {
    max-width: 920px;
}

.settings-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr 1fr;
}
.settings-grid .full-width { grid-column: 1 / -1; }
.card h2 { margin: 0 0 14px; font-size: 1.1rem; }

.toggle-row {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid #dbe6f8;
    background: #f8fbff;
    border-radius: 12px;
    padding: 10px 12px;
}

.toggle-row input {
    width: auto;
    margin-top: 0;
}

.toggle-row span {
    font-size: 14px;
    color: #0f172a;
    font-weight: 600;
}

@media (max-width: 980px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        padding: 12px;
    }

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

    .grid.four,
    .grid.two {
        grid-template-columns: 1fr;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }
}