:root {
    --admin-bg: #f6f7f8;
    --admin-panel: #ffffff;
    --admin-text: #20242a;
    --admin-muted: #68717d;
    --admin-border: #d9dde3;
    --admin-accent: #20242a;
    --admin-accent-text: #ffffff;
    --admin-danger: #b42318;
    --admin-success-bg: #e7f7ed;
    --admin-success: #146c43;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, "Pretendard", sans-serif;
    color: var(--admin-text);
    background: var(--admin-bg);
}

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

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

.admin-login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.admin-login-card {
    width: min(420px, 100%);
    background: var(--admin-panel);
    border: 1px solid var(--admin-border);
    padding: 32px;
}

.admin-login-card h1,
.admin-login-card p {
    margin-top: 0;
}

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

.admin-sidebar {
    min-height: 100vh;
    padding: 24px 18px;
    background: #171a1f;
    color: #fff;
}

.admin-brand {
    display: block;
    margin-bottom: 28px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.admin-nav {
    display: grid;
    gap: 6px;
}

.admin-nav a,
.admin-secondary-link {
    display: block;
    padding: 10px 12px;
    color: rgba(255, 255, 255, 0.78);
}

.admin-nav a:hover,
.admin-secondary-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.admin-secondary-link {
    margin-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
    padding-top: 18px;
}

.admin-main {
    padding: 28px;
    min-width: 0;
}

.admin-topbar,
.admin-panel-header,
.admin-form-actions,
.admin-row-actions,
.admin-actions-grid {
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-topbar,
.admin-panel-header {
    justify-content: space-between;
}

.admin-topbar {
    margin-bottom: 24px;
}

.admin-topbar h1,
.admin-topbar p {
    margin: 0;
}

.admin-topbar p {
    margin-top: 4px;
    color: var(--admin-muted);
}

.admin-panel,
.admin-stat {
    background: var(--admin-panel);
    border: 1px solid var(--admin-border);
}

.admin-panel {
    padding: 22px;
    margin-bottom: 20px;
    overflow-x: auto;
}

.admin-panel h2 {
    margin: 0 0 16px;
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}

.admin-stat {
    padding: 18px;
}

.admin-stat span {
    display: block;
    color: var(--admin-muted);
    font-size: 13px;
    margin-bottom: 8px;
}

.admin-stat strong {
    font-size: 24px;
}

.admin-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid var(--admin-accent);
    background: var(--admin-accent);
    color: var(--admin-accent-text);
    cursor: pointer;
}

.admin-button-light {
    background: #fff;
    color: var(--admin-accent);
}

.admin-alert {
    padding: 12px 14px;
    border: 1px solid var(--admin-border);
    margin-bottom: 16px;
}

.admin-alert.success {
    background: var(--admin-success-bg);
    color: var(--admin-success);
    border-color: #b7e4c7;
}

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

.admin-table th,
.admin-table td {
    padding: 12px 10px;
    border-bottom: 1px solid var(--admin-border);
    text-align: left;
    vertical-align: top;
}

.admin-table th {
    color: var(--admin-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.admin-row-actions {
    justify-content: flex-end;
}

.admin-row-actions form {
    margin: 0;
}

.admin-row-actions button {
    border: 0;
    background: transparent;
    color: var(--admin-danger);
    cursor: pointer;
    padding: 0;
}

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

.admin-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.admin-form label {
    display: grid;
    gap: 7px;
}

.admin-form label span {
    color: var(--admin-muted);
    font-size: 13px;
}

.admin-form input,
.admin-form select,
.admin-form textarea {
    width: 100%;
    border: 1px solid var(--admin-border);
    background: #fff;
    color: var(--admin-text);
    padding: 11px 12px;
}

.admin-form textarea {
    resize: vertical;
}

.admin-editor {
    min-height: 620px;
    border: 1px solid var(--admin-border);
    background: #fff;
}

.admin-editor-warning {
    margin: 0;
    padding: 14px;
    border: 1px solid var(--admin-border);
    background: #fff7e6;
    color: #7a4b00;
}

.admin-form em {
    color: var(--admin-danger);
    font-style: normal;
    font-size: 12px;
}

.admin-check {
    display: flex !important;
    grid-template-columns: auto 1fr;
    align-items: center;
}

.admin-check input {
    width: auto;
}

@media (max-width: 900px) {
    .admin-shell {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        min-height: auto;
    }

    .admin-grid,
    .admin-form-grid {
        grid-template-columns: 1fr;
    }

    .admin-topbar,
    .admin-panel-header,
    .admin-form-actions,
    .admin-actions-grid {
        align-items: stretch;
        flex-direction: column;
    }
}