:root {
    --color-bg: #f7f7f8;
    --color-surface: #ffffff;
    --color-border: #e2e2e5;
    --color-text: #1c1c1e;
    --color-text-muted: #6b6b70;
    --color-accent: #2563eb;
    --color-error: #d33;
    --radius: 8px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.5;
}

/* ---------- Topbar ---------- */
.topbar {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 14px 24px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.topbar__brand { font-weight: 600; }

.topbar__nav { display: flex; gap: 16px; flex: 1; }

.topbar__nav a,
.topbar__user a {
    color: var(--color-text-muted);
    text-decoration: none;
}

.topbar__nav a:hover,
.topbar__user a:hover { color: var(--color-accent); }

.content { max-width: 1100px; margin: 0 auto; padding: 32px 24px; }

/* ---------- Login ---------- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    width: 320px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.login-form h1 { font-size: 18px; margin: 0 0 8px; }

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

.login-form input {
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
}

.login-form button {
    margin-top: 8px;
    padding: 10px;
    border: none;
    border-radius: var(--radius);
    background: var(--color-accent);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

.login-form .error {
    color: var(--color-error);
    font-size: 13px;
    margin: 0;
}