:root {
    color-scheme: dark;
    --bg: #080d15;
    --panel: #111927;
    --line: rgba(137, 164, 196, 0.18);
    --text: #f4f7fb;
    --muted: #9aa8ba;
    --cyan: #20d7ff;
    --green: #49e56f;
    --red: #ff5d68;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.login-screen {
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card,
.admin-card,
.stat-grid article {
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(32, 215, 255, 0.045), transparent), var(--panel);
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

.login-card {
    width: min(420px, 100%);
    padding: 28px;
}

.login-card h1,
.admin-topbar h1 {
    margin: 8px 0 22px;
}

.admin-kicker {
    color: var(--cyan);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.admin-shell {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    min-height: 100vh;
}

.admin-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    border-right: 1px solid var(--line);
    background: #0c131f;
    padding: 24px;
}

.admin-brand {
    color: var(--cyan);
    font-weight: 900;
    letter-spacing: 0.12em;
}

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

.admin-sidebar a,
.admin-sidebar button,
.admin-button,
.admin-form button,
.login-card button,
.row-actions button {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    border-radius: 6px;
    padding: 10px 12px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.admin-sidebar a:hover,
.admin-button:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.admin-sidebar form {
    margin-top: auto;
}

.admin-sidebar button {
    width: 100%;
}

.admin-main {
    padding: 28px;
}

.admin-topbar {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
    margin-bottom: 24px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 18px;
}

.stat-grid article {
    padding: 20px;
}

.stat-grid span,
.muted {
    color: var(--muted);
}

.stat-grid strong {
    display: block;
    margin-top: 8px;
    font-size: 28px;
}

.admin-card {
    padding: 22px;
}

.card-heading,
.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 18px;
}

.card-heading h2 {
    margin: 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    border-bottom: 1px solid var(--line);
    padding: 12px 8px;
    text-align: left;
}

th {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}

.row-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.row-actions form {
    margin: 0;
}

.row-actions button {
    color: var(--red);
}

.admin-form {
    display: grid;
    gap: 16px;
}

label {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    background: #0b121d;
    color: var(--text);
    border-radius: 6px;
    padding: 11px 12px;
    font: inherit;
}

textarea {
    resize: vertical;
}

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

.checkbox input {
    width: auto;
}

.alert,
.success {
    border-radius: 6px;
    padding: 11px 12px;
}

.alert {
    border: 1px solid rgba(255, 93, 104, 0.6);
    color: #ffd8dc;
}

.success {
    border: 1px solid rgba(73, 229, 111, 0.6);
    color: #d8ffe0;
}

.ghost {
    color: var(--muted);
}

@media (max-width: 840px) {
    .admin-shell,
    .stat-grid {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .admin-topbar,
    .card-heading,
    .form-actions {
        align-items: flex-start;
        flex-direction: column;
    }
}