@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
    --primary-color: #007bff;
    --background-color: #f4f7f9;
    --card-background: #ffffff;
    --text-color: #333;
    --subtle-text: #666;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

body {
    margin: 0;
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 2rem;
}

.search-container {
    background-color: var(--card-background);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--box-shadow);
    width: 100%;
    max-width: 600px;
    transition: all 0.3s ease;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    margin: 0 0 0.5rem 0;
    font-weight: 700;
}

header p {
    color: var(--subtle-text);
    margin: 0;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box; /* ### 追加 ### */
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.15);
}

.date-range {
    display: flex;
    gap: 1.5rem;
}

/* ### 変更点 ### */
.datetime-picker {
    flex: 1;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group input[type="date"] {
    flex: 3; /* 日付の幅を広めに */
}

.input-group input[type="time"] {
    flex: 2; /* 時刻の幅を狭めに */
}
/* ### 変更ここまで ### */


.search-button {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

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

.search-button:active {
    transform: translateY(1px);
}

.search-button .icon {
    width: 1.2rem;
    height: 1.2rem;
}

.hidden {
    display: none !important;
}

#loading {
    text-align: center;
    margin-top: 2rem;
    color: var(--subtle-text);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0,0,0,0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@media (max-width: 600px) {
    body { padding: 1rem; }
    .search-container { padding: 1.5rem; }
    .date-range { flex-direction: column; gap: 1.5rem; }
}