body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 20px;
    background-color: #f4f7f6;
}

.container {
    max-width: 700px;
    margin: 20px auto;
    padding: 25px;
    border: 1px solid #ddd;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-color: white;
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 25px;
}

.input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 18px;
}

.input-group > div {
    flex: 1;
    min-width: 200px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: bold;
    color: #555;
}

input[type="date"], input[type="time"], select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

input[type="date"]:focus, input[type="time"]:focus, select:focus {
    border-color: #007bff;
    outline: none;
}

.checkbox-group label {
    display: inline-block;
    margin-left: 5px;
    font-weight: normal;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    vertical-align: middle;
}

button {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

#resultTableContainer {
    margin-top: 25px;
}

#resultTable {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

#resultTable th, #resultTable td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: left;
    word-break: break-word;
}

#resultTable th {
    background-color: #e9f7ef;
    color: #2e7d32;
    font-weight: bold;
}

#resultTable td {
    background-color: #fff;
}

.error {
    color: #d32f2f;
    margin-top: 12px;
    font-weight: bold;
    padding: 10px;
    background-color: #ffebee;
    border: 1px solid #ffcdd2;
    border-radius: 5px;
}

.highlight {
    background-color: #fff9c4 !important;
}

.explanation {
    margin-top: 20px;
    padding: 15px;
    background-color: #eef;
    border-left: 5px solid #55a;
    font-size: 0.9rem;
    line-height: 1.5;
}

.explanation h3 {
    margin-top: 0;
    margin-bottom: 10px;
    color: #336;
}

.explanation ul {
    padding-left: 20px;
    margin-top: 5px;
    margin-bottom: 10px;
}

.explanation li {
    margin-bottom: 5px;
}

.copy-icon {
    cursor: pointer;
    color: #007bff;
    margin-left: 5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.copy-icon svg {
    width: 20px;
    height: 20px;
    vertical-align: middle;
}

.copy-icon:hover {
    color: #0056b3;
}

.copy-success {
    color: #28a745;
}

.action-cell {
    text-align: center !important;
    width: 50px;
    vertical-align: middle;
}

/* ===== theme (skin) overrides — token 駆動・常時適用（var は /css/theme.css 由来） ===== */
body { background-color: var(--color-bg-base); color: var(--color-fg-primary); }
.container { background-color: var(--color-bg-surface); box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4); }
h2 { color: var(--color-fg-primary); }
label { color: var(--color-fg-muted); }
input[type="date"], input[type="time"], select {
    background: var(--color-bg-elevated);
    color: var(--color-fg-primary);
    border-color: var(--color-border-base);
}
input[type="date"]:focus, input[type="time"]:focus, select:focus { border-color: var(--color-accent); }
button { background-color: var(--color-accent); color: var(--color-accent-fg); }
button:hover { background-color: var(--color-accent); filter: brightness(1.12); }
#resultTable th { background-color: var(--color-bg-elevated); color: var(--color-accent); border-color: var(--color-border-base); }
#resultTable td { background-color: var(--color-bg-surface); color: var(--color-fg-primary); border-color: var(--color-border-base); }
.highlight { background-color: var(--color-bg-elevated) !important; }
.explanation { background-color: var(--color-bg-elevated); border-left-color: var(--color-accent); }
.explanation h3 { color: var(--color-fg-primary); }
.copy-icon { color: var(--color-accent); }