:root {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
}

body {
    margin: 0;
    background: #f6f8fb;
    color: #111;
}

a {
    color: inherit;
    text-decoration: none;
}

.dw-header {
    position: sticky;
    top: 0;
    background: #fff;
    border-bottom: 1px solid #e6eaf0;
    z-index: 10;
}

.dw-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.dw-brand {
    font-weight: 700;
}

.dw-nav {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

.dw-nav a {
    padding: 8px 10px;
    border-radius: 8px;
}

.dw-nav a:hover {
    background: #f1f4f8;
}

.dw-nav-toggle {
    display: none;
    margin-left: auto;
    border: 1px solid #e6eaf0;
    background: #fff;
    padding: 6px 10px;
    border-radius: 10px;
}

.dw-main {
    padding: 18px 16px;
}

.dw-container {
    max-width: 1100px;
    margin: 0 auto;
}

.dw-card {
    background: #fff;
    border: 1px solid #e6eaf0;
    border-radius: 16px;
    padding: 18px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .04);
}

.dw-title {
    margin: 0 0 10px;
    font-size: 20px;
}

.dw-subtitle {
    margin: 0 0 14px;
    color: #555;
}

.dw-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.dw-label {
    font-weight: 600;
    font-size: 14px;
}

.dw-input {
    padding: 10px 12px;
    border: 1px solid #d9e1ee;
    border-radius: 12px;
    font-size: 14px;
}

.dw-help {
    margin: 0;
    font-size: 12px;
    color: #666;
}

.dw-actions {
    display: flex;
    gap: 10px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.dw-btn {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 12px;
    background: #1b64ff;
    color: #fff;
    border: 1px solid #1b64ff;
}

.dw-btn-outline {
    background: #fff;
    color: #1b64ff;
}

.dw-alert {
    background: #fff3f3;
    border: 1px solid #ffd0d0;
    padding: 10px 12px;
    border-radius: 12px;
}

.dw-alert-ok {
    background: #f2fff5;
    border-color: #b8f2c3;
}

.dw-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 14px;
}

.dw-tile {
    border: 1px solid #e6eaf0;
    border-radius: 14px;
    padding: 14px;
    background: #fff;
}

.dw-tile:hover {
    background: #f8fbff;
}

.dw-tile-title {
    font-weight: 700;
    margin-bottom: 6px;
}

.dw-tile-desc {
    color: #666;
    font-size: 13px;
}

.dw-footer {
    border-top: 1px solid #e6eaf0;
    background: #fff;
    padding: 16px;
}

.dw-footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    color: #666;
    font-size: 12px;
}

@media (max-width: 780px) {
    .dw-nav-toggle {
        display: block;
    }

    .dw-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        padding: 10px 0;
    }

    .dw-nav.is-open {
        display: flex;
    }

    .dw-grid {
        grid-template-columns: 1fr;
    }
}