/* カスタムスタイル */
:root {
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --navbar-bg: #0d6efd;
    --button-primary: #0d6efd;
    --table-header-bg: #343a40;
    --table-header-text: #ffffff;
    --form-bg: #ffffff;
    --form-border: #e9ecef;
    --form-focus: #0d6efd;
    --shadow-color: rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --border-color: #495057;
    --card-bg: #2d2d2d;
    --navbar-bg: #1a1a1a;
    --button-primary: #0d6efd;
    --table-header-bg: #495057;
    --table-header-text: #e9ecef;
    --form-bg: #2d2d2d;
    --form-border: #495057;
    --form-focus: #0d6efd;
    --shadow-color: rgba(0,0,0,0.3);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.card {
    border: 1px solid var(--border-color);
    border-radius: 15px;
    background-color: var(--card-bg);
    color: var(--text-primary);
    transition: transform 0.2s ease-in-out, background-color 0.3s ease, border-color 0.3s ease;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    border: none;
    background-color: var(--button-primary) !important;
    color: white !important;
}

.card-body {
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.btn {
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.form-select, .form-control {
    border-radius: 10px;
    border: 2px solid var(--form-border);
    background-color: var(--form-bg);
    color: var(--text-primary);
    transition: border-color 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}

.form-select:focus, .form-control:focus {
    border-color: var(--form-focus);
    background-color: var(--form-bg);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-check-input {
    background-color: var(--form-bg);
    border-color: var(--form-border);
}

.form-check-input:checked {
    background-color: var(--button-primary);
    border-color: var(--button-primary);
}

.form-check-label {
    color: var(--text-primary);
}

.table {
    border-radius: 10px;
    overflow: hidden;
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.table th {
    background-color: var(--table-header-bg);
    color: var(--table-header-text);
    border: none;
    font-weight: 500;
}

.table td {
    border-color: var(--border-color);
    vertical-align: middle;
    background-color: var(--card-bg);
    color: var(--text-primary);
}

.table-striped > tbody > tr:nth-of-type(odd) > td {
    background-color: var(--bg-primary);
}

.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}

.display-4 {
    font-weight: 700;
}

.lead {
    font-size: 1.1rem;
}

footer {
    margin-top: auto;
    background-color: var(--bg-secondary) !important;
    color: var(--text-secondary) !important;
    border-top: 1px solid var(--border-color);
}

.navbar {
    background-color: var(--navbar-bg) !important;
    border-bottom: 1px solid var(--border-color);
}

.alert {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.text-muted {
    color: var(--text-secondary) !important;
}

.bg-light {
    background-color: var(--bg-secondary) !important;
}

/* ダークモード切り替えボタン */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    background-color: var(--button-primary);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--shadow-color);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .display-4 {
        font-size: 2rem;
    }
    
    .chart-container {
        height: 300px;
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* アニメーション */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

/* スキー場選択のハイライト */
.form-select:valid {
    border-color: #28a745;
}

.form-check-input:checked + .form-check-label {
    color: #0d6efd;
    font-weight: 500;
}