:root {
    --background: #f4f5f7;
    --surface: #ffffff;
    --border: #dfe3e8;
    --text: #20252b;
    --muted: #68707a;
    --primary: #20252b;
    --primary-hover: #343b43;
    --error-background: #fff0f0;
    --error-border: #e2a4a4;
    --error-text: #8a2020;
    --success-background: #edf9f1;
    --success-border: #9cc9aa;
    --success-text: #1f6836;
}

* {
    box-sizing: border-box;
}

html {
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    color: var(--text);
    background: var(--background);
}

body {
    margin: 0;
    min-height: 100vh;
}

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

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    padding: 32px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
}

.brand {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.brand-name {
    font-size: 22px;
    font-weight: 700;
}

.brand-section {
    color: var(--muted);
    font-size: 15px;
}

h1 {
    margin: 28px 0 24px;
    font-size: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 11px 12px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #707985;
    outline: 2px solid rgba(60, 70, 80, 0.12);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border: 0;
    border-radius: 7px;
    cursor: pointer;
    text-decoration: none;
}

.button-primary {
    width: 100%;
    color: #fff;
    background: var(--primary);
}

.button-primary:hover {
    background: var(--primary-hover);
}

.button-secondary {
    color: var(--text);
    background: #fff;
    border: 1px solid var(--border);
}

.message {
    margin-bottom: 20px;
    padding: 12px 14px;
    border: 1px solid;
    border-radius: 7px;
}

.message-error {
    color: var(--error-text);
    background: var(--error-background);
    border-color: var(--error-border);
}

.message-success {
    color: var(--success-text);
    background: var(--success-background);
    border-color: var(--success-border);
}

.topbar {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.cms-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    min-height: calc(100vh - 69px);
}

.sidebar {
    padding: 20px 14px;
    background: var(--surface);
    border-right: 1px solid var(--border);
}

.sidebar form {
    margin: 0;
}

.nav-link,
.nav-button {
    display: block;
    width: 100%;
    padding: 11px 12px;
    color: var(--text);
    background: transparent;
    border: 0;
    border-radius: 7px;
    text-align: left;
    text-decoration: none;
    cursor: pointer;
}

.nav-link:hover,
.nav-button:hover,
.nav-link-active {
    background: var(--background);
}

.content {
    width: 100%;
    max-width: 1300px;
    padding: 32px;
}

.user-info {
    display: grid;
    grid-template-columns: 170px 1fr;
    max-width: 600px;
    padding: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.user-info dt {
    font-weight: 600;
}

.user-info dd {
    margin: 0 0 12px;
}

@media (max-width: 760px) {
    .cms-layout {
        display: block;
    }

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

    .content {
        padding: 22px;
    }
}