:root {
    color-scheme: light dark;
    --bg: #f5f6f8;
    --surface: #ffffff;
    --text: #1c1f24;
    --muted: #5b6472;
    --border: #dfe3e9;
    --accent: #2f5bd7;
    --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14171c;
        --surface: #1c2027;
        --text: #e9ecf1;
        --muted: #9aa3b1;
        --border: #2c323b;
        --accent: #7ea0ff;
        --error: #f2b8b5;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-header, .page-footer {
    padding: 16px 24px;
    border-color: var(--border);
    border-style: solid;
    border-width: 0;
}

.page-header { border-bottom-width: 1px; }
.page-footer { border-top-width: 1px; color: var(--muted); font-size: 13px; }

.brand {
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.01em;
}

.page-main {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 48px 24px;
}

.card {
    width: 100%;
    max-width: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px;
}

.card h1 { margin: 0 0 4px; font-size: 20px; }
.card h2 { margin: 20px 0 8px; font-size: 15px; }

.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--error); }

.field { margin: 14px 0; display: flex; flex-direction: column; gap: 6px; }
.field-inline { flex-direction: row; align-items: center; gap: 8px; }

label { font-size: 13px; color: var(--muted); }

input[type="text"], input[type="email"], input[type="password"] {
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}

input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.actions { display: flex; gap: 8px; margin-top: 20px; }

.button {
    padding: 9px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }

.validation-summary { color: var(--error); font-size: 13px; }
.validation-summary ul { margin: 8px 0 0; padding-left: 18px; }

.scopes { list-style: none; margin: 0; padding: 0; }
.scopes li { padding: 6px 0; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }