:root {
    --ink: #17202a;
    --muted: #64748b;
    --line: #d9e2ec;
    --bg: #f5f7fa;
    --panel: #ffffff;
    --blue: #1d5f99;
    --teal: #16847c;
    --danger: #b42318;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--bg);
    font-family: Arial, "Noto Sans TC", sans-serif;
}

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

.admin-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 240px;
    padding: 24px;
    background: #17202a;
    color: #fff;
}

.admin-brand {
    display: block;
    margin-bottom: 28px;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
}

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

.admin-sidebar a {
    padding: 10px 12px;
    border-radius: 6px;
    color: rgba(255, 255, 255, 0.82);
}

.admin-sidebar a:hover {
    background: rgba(255, 255, 255, 0.09);
    color: #fff;
}

.admin-main {
    margin-left: 240px;
    padding: 28px;
}

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

.admin-topbar h1 {
    margin: 0;
}

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

.stats-grid article,
.admin-panel,
.login-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
}

.stats-grid span {
    display: block;
    color: var(--muted);
}

.stats-grid strong {
    display: block;
    margin: 10px 0 16px;
    font-size: 34px;
}

.admin-panel {
    margin-bottom: 22px;
}

.admin-panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.admin-panel h2 {
    margin-top: 0;
}

.inline-filter {
    min-width: 220px;
}

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

label {
    display: grid;
    gap: 6px;
    font-weight: 700;
}

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

textarea {
    resize: vertical;
}

.content-editor.is-html-mode {
    font-family: Consolas, "Courier New", monospace;
    background: #101722;
    color: #e5edf5;
    border-color: #334155;
}

.form-row {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 16px;
    align-items: end;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
}

.checkbox input {
    width: auto;
}

.image-manager {
    display: grid;
    gap: 14px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f8fafc;
}

.image-manager p {
    margin: 4px 0 0;
    color: var(--muted);
    font-weight: 400;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.image-card {
    gap: 8px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
}

.image-card img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    border-radius: 6px;
    background: #edf2f7;
}

.image-card span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-weight: 700;
}

.image-card input {
    width: auto;
}

button,
.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    min-height: 42px;
    padding: 9px 16px;
    border: 0;
    border-radius: 6px;
    background: var(--teal);
    color: #fff;
    font: inherit;
    cursor: pointer;
}

.button-link {
    background: #edf2f7;
    color: var(--ink);
}

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

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

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

th {
    color: var(--muted);
    font-size: 13px;
}

.actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.actions form {
    margin: 0;
}

.actions button {
    min-height: 0;
    padding: 0;
    background: transparent;
    color: var(--danger);
}

.login-page {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    width: min(100%, 420px);
    display: grid;
    gap: 16px;
}

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

.login-card p {
    color: var(--muted);
}

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

.alert {
    background: #fef3f2;
    color: var(--danger);
}

.notice {
    background: #ecfdf3;
    color: #067647;
}

@media (max-width: 760px) {
    .admin-sidebar {
        position: static;
        width: auto;
    }

    .admin-main {
        margin-left: 0;
        padding: 20px;
    }

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