:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #162033;
    --muted: #6b7280;
    --border: #d8dee9;
    --primary: #1f5eff;
    --primary-dark: #1747c2;
    --danger: #b91c1c;
    --danger-bg: #fee2e2;
    --success-bg: #dcfce7;
    --warning-bg: #fef3c7;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 28px;
    background: #111827;
    color: #fff;
}
.brand { font-weight: 700; }
nav { display: flex; align-items: center; gap: 18px; }
nav a, .link-button { color: #fff; text-decoration: none; }
.link-button { background: transparent; border: 0; cursor: pointer; font: inherit; padding: 0; }

.container { max-width: 1180px; margin: 32px auto; padding: 0 20px; }
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}
.login-card { max-width: 430px; margin: 70px auto; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
h1 { margin: 0 0 8px; }
p { color: var(--muted); margin-top: 0; }

label { display: block; margin-top: 16px; margin-bottom: 6px; font-weight: 700; }
input {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
}
input:disabled { background: #eef2f7; }
.checkbox-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; }
.hint { font-size: 13px; margin-top: 6px; }

button, .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 10px 14px;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
    line-height: 1.2;
}
.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.primary:hover { background: var(--primary-dark); }
.secondary { background: #fff; color: var(--text); border-color: var(--border); }
.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.small { padding: 7px 10px; font-size: 13px; }
.form-actions { display: flex; gap: 10px; margin-top: 24px; }
.inline-form { display: inline; }

.search-form { display: flex; gap: 10px; margin-bottom: 18px; }
.search-form input { flex: 1; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: #f8fafc; font-size: 13px; color: var(--muted); }
.actions { white-space: nowrap; }
.empty { text-align: center; color: var(--muted); padding: 30px; }
.muted { color: var(--muted); }
.logo-thumb { max-width: 75px; max-height: 42px; object-fit: contain; border: 1px solid var(--border); border-radius: 6px; background: #fff; }
.logo-preview { margin-top: 18px; display: grid; gap: 8px; color: var(--muted); font-size: 13px; }
.logo-preview img { max-width: 260px; max-height: 140px; object-fit: contain; border: 1px solid var(--border); border-radius: 8px; background: #fff; padding: 8px; }

.messages { margin-bottom: 16px; }
.alert { border-radius: 8px; padding: 12px 14px; margin-bottom: 10px; }
.alert-danger { background: var(--danger-bg); color: #7f1d1d; }
.alert-success { background: var(--success-bg); color: #14532d; }
.alert-warning { background: var(--warning-bg); color: #78350f; }

@media (max-width: 720px) {
    .page-header, .search-form { flex-direction: column; }
    .button, button { width: 100%; }
    .inline-form button.small { width: auto; }
}