:root {
    color-scheme: light;
    --bg: #f5f5f4;
    --surface: #ffffff;
    --ink: #1f2937;
    --ink-muted: #6b7280;
    --accent: #1A3C34;
    --accent-strong: #0F231E;
    --danger: #b91c1c;
    --border: #e7e5e4;
    --shadow: 0 2px 6px rgba(15, 35, 30, .08);
}

* { box-sizing: border-box; }

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.brand a { font-weight: 600; font-size: 16px; color: var(--accent-strong); }

.userbox { display: flex; align-items: center; gap: 12px; }
.user-email { color: var(--ink-muted); font-size: 13px; }

button.logout {
    border: 1px solid var(--border);
    background: transparent;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--ink-muted);
    font: inherit;
}
button.logout:hover { background: var(--bg); color: var(--ink); }

.page { max-width: 1200px; margin: 32px auto; padding: 0 24px; }

.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh;
    background: linear-gradient(145deg, #1A3C34 0%, #0F231E 55%, #1E3D35 100%);
}

.login-shell {
    background: var(--surface);
    padding: 40px 32px;
    border-radius: 12px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, .25);
    width: min(420px, 92vw);
    text-align: center;
}

.login-shell h1 { margin: 0 0 8px; color: var(--accent-strong); font-size: 24px; }
.tagline { color: var(--ink-muted); font-size: 14px; margin: 0 0 24px; }

.error-banner {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--danger);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 16px;
}

.google-btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 14px;
    border: 0;
    cursor: pointer;
    text-decoration: none;
    width: 100%;
    margin-bottom: 20px;
    font: inherit;
}
.google-btn:hover { background: var(--accent-strong); text-decoration: none; }

.footnote { color: var(--ink-muted); font-size: 12px; margin: 0; }