:root {
    --ink: #17202a;
    --muted: #68727d;
    --paper: #f7f2ea;
    --surface: #fff;
    --line: #e4ddd2;
    --accent: #f3bf25;
    --danger: #c7352e;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: var(--paper);
}
a { color: inherit; }
.login-screen {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 22px;
}
.login-box {
    width: min(420px, 100%);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 28px;
    box-shadow: 0 18px 55px rgba(23, 32, 42, .13);
}
.login-box img { width: 220px; margin-bottom: 18px; }
.admin-shell {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    min-height: 100vh;
}
.admin-nav {
    background: var(--ink);
    color: white;
    padding: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.admin-nav img {
    background: white;
    border-radius: 8px;
    padding: 8px;
    margin-bottom: 10px;
}
.admin-nav a {
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 8px;
    color: rgba(255,255,255,.82);
}
.admin-nav a.active, .admin-nav a:hover {
    background: var(--accent);
    color: var(--ink);
}
.admin-main {
    padding: 28px;
}
h1 {
    margin: 0 0 18px;
    font-size: clamp(1.8rem, 3vw, 3rem);
}
h2 { margin: 24px 0 10px; }
.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.panel, form, table {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
}
.panel { padding: 18px; }
form { padding: 18px; margin-bottom: 18px; }
label {
    display: grid;
    gap: 6px;
    margin-bottom: 12px;
    font-weight: 700;
}
input, textarea, select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    font: inherit;
    background: white;
}
textarea { min-height: 120px; resize: vertical; }
button, .button {
    border: 0;
    border-radius: 8px;
    padding: 10px 14px;
    background: var(--ink);
    color: white;
    font-weight: 800;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    min-height: 42px;
}
button.danger { background: var(--danger); }
.inline-form {
    display: inline;
    padding: 0;
    margin: 0;
    border: 0;
    background: transparent;
}
table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
}
th, td {
    text-align: left;
    vertical-align: top;
    padding: 10px;
    border-bottom: 1px solid var(--line);
}
th { background: #fbf7ef; }
.flash {
    padding: 12px 14px;
    background: #e9f7ef;
    border: 1px solid #b9e5ca;
    border-radius: 8px;
}
.flash.error {
    background: #ffecea;
    border-color: #f0b4ae;
}
.muted { color: var(--muted); }
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}
.thumb {
    width: 92px;
    height: 72px;
    object-fit: cover;
    border-radius: 8px;
}
.sort-input {
    max-width: 96px;
}
.topic-admin-preview {
    width: min(260px, 100%);
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--line);
    margin-bottom: 12px;
}
.record-list {
    display: grid;
    gap: 14px;
}
.record-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px;
}
.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
@media (max-width: 820px) {
    .admin-shell { grid-template-columns: 1fr; }
    .admin-nav { position: static; }
    .grid, .two-col { grid-template-columns: 1fr; }
}