/* ライト基調。余白と視認性を重視 */
:root {
    --bg: #f6f8fb;
    --card: #ffffff;
    --line: #e6eaf0;
    --text: #1a1f29;
    --muted: #6a7688;
    --accent: #7b5cff;
    --accent-2: #24c1b5;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(900px 600px at 15% -10%, #eef2ff 0%, transparent 60%),
        radial-gradient(900px 600px at 110% 10%, #e7fff9 0%, transparent 60%),
        var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP",
                 Roboto, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: min(960px, 92%);
    margin: 0 auto;
}

/* ヘッダー */
.site-header {
    padding: 64px 0 28px;
    background: transparent;
}

.site-title {
    margin: 0 0 6px;
    font-size: clamp(24px, 3vw, 38px);
    font-weight: 800;
    letter-spacing: 0.01em;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.site-sub {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

/* セクション */
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 26px;
    margin: 22px 0;
    box-shadow: 0 10px 26px rgba(16, 24, 40, 0.06);
}

.section-title {
    margin: 0 0 14px;
    font-size: clamp(18px, 2.1vw, 24px);
    padding-left: 12px;
    border-left: 4px solid var(--accent);
}

.subcard {
    border: 1px dashed var(--line);
    border-radius: 14px;
    padding: 16px;
    margin-top: 16px;
    background: #fafbff;
}

.sub-title {
    margin: 0 0 8px;
    font-size: 16px;
}

.note {
    color: var(--muted);
    font-size: 13px;
    margin: 4px 0 12px;
}

/* フィールド */
.field {
    display: grid;
    grid-template-columns: 92px 1fr;
    gap: 10px;
    align-items: center;
    margin-bottom: 16px;
}

.label {
    color: var(--muted);
    font-size: 14px;
}

select {
    width: 100%;
    padding: 11px 12px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text);
    appearance: none;
}

/* ボタン */
.btn,
.btn-outline {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    text-align: center;
    transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    border: 0;
    box-shadow: 0 10px 20px rgba(123, 92, 255, 0.22);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(123, 92, 255, 0.3);
}

.btn-outline {
    color: var(--text);
    border: 1px solid var(--line);
    background: #fff;
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* 銀行情報 */
.bank dl {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 8px 14px;
    margin: 0;
}

.bank dt {
    color: var(--muted);
}

.bank dd {
    margin: 0;
}

/* リスト */
.bullet {
    margin: 6px 0 0 1.2em;
    padding: 0;
}

.bullet li {
    margin: 6px 0;
}

/* フッター */
.site-footer {
    margin-top: 40px;
    padding: 22px 0 34px;
    color: var(--muted);
    font-size: 13px;
}

.footer-inner {
    display: flex;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.footer-nav a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 12px;
}

.footer-nav a:hover {
    color: var(--text);
}

/* モバイル最適化 */
@media (max-width: 520px) {
    .field {
        grid-template-columns: 1fr;
    }
    .bank dl {
        grid-template-columns: 1fr;
    }
}