:root {
    color-scheme: light;
    --fg: #1f2933;
    --bg: #f7f8fa;
    --border: #d7dce1;
    --accent: #2f6fed;
    --danger: #c0392b;
    --muted: #6b7785;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Segoe UI", sans-serif;
    color: var(--fg);
    background: var(--bg);
    line-height: 1.7;
}

.container {
    max-width: 880px;
    margin: 0 auto;
    padding: 24px 16px 64px;
}

header.app-header {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header.app-header nav a {
    margin-left: 16px;
    color: var(--fg);
    text-decoration: none;
    font-size: 14px;
}

header.app-header nav a:hover { color: var(--accent); }

h1 { font-size: 20px; }
h2 { font-size: 16px; margin-top: 32px; }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }

input[type=text], input[type=email], input[type=password], input[type=number], input[type=file], textarea, select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
}

textarea { resize: vertical; }

.btn {
    display: inline-block;
    padding: 8px 18px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
}

.btn.secondary { background: #fff; color: var(--fg); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }

.alert {
    padding: 10px 14px;
    border-radius: 4px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert.error { background: #fdecea; color: var(--danger); border: 1px solid #f5c6cb; }
.alert.info { background: #eaf2ff; color: #1a4faa; border: 1px solid #cfe0ff; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 12px; }
.badge.active { background: #e6f4ea; color: #1e7b34; }
.badge.expired { background: #f1f3f5; color: var(--muted); }
.badge.deleted { background: #fdecea; color: var(--danger); }

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