/* ========================================
   セントラルサーキット - メインスタイル
   ======================================== */

/* リセット・基本設定 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #1a56db;
    --primary-dark: #1e429f;
    --secondary-color: #6b7280;
    --accent-color: #dc2626;
    --success-color: #059669;
    --warning-color: #d97706;
    --error-color: #dc2626;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-gray: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* コンテナ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ========================================
   ヘッダー
   ======================================== */
.site-header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.site-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
}

.main-nav .nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.main-nav a {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a:hover {
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-color);
    transition: 0.3s;
}

/* ========================================
   ボタン
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    background: var(--bg-gray);
    color: var(--text-color);
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-light);
    padding: 0.5rem;
}

.btn-text:hover {
    color: var(--text-color);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

.btn-danger {
    background: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background: #b91c1c;
    color: white;
}

/* ========================================
   アラート
   ======================================== */
.alert {
    padding: 1rem 0;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
}

/* ========================================
   フォーム
   ======================================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-label .required {
    color: var(--error-color);
    margin-left: 0.25rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-color);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-control.is-invalid {
    border-color: var(--error-color);
}

.form-error {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-help {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

/* ========================================
   カード
   ======================================== */
.card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.card-text {
    color: var(--text-light);
    font-size: 0.875rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-gray);
}

/* ========================================
   グリッド
   ======================================== */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ========================================
   セクション
   ======================================== */
.section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.125rem;
}

/* ========================================
   ヒーロー
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 5rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.hero .btn-primary {
    background: white;
    color: var(--primary-color);
}

.hero .btn-outline {
    border-color: white;
    color: white;
}

/* ========================================
   テーブル
   ======================================== */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--bg-gray);
    font-weight: 600;
}

.table tbody tr:hover {
    background: var(--bg-gray);
}

/* ========================================
   バッジ
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
}

.badge-primary {
    background: #dbeafe;
    color: var(--primary-color);
}

.badge-success {
    background: #d1fae5;
    color: var(--success-color);
}

.badge-warning {
    background: #fef3c7;
    color: var(--warning-color);
}

.badge-danger {
    background: #fee2e2;
    color: var(--error-color);
}

/* ========================================
   フッター
   ======================================== */
.site-footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-info h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-info p {
    color: #9ca3af;
    line-height: 1.8;
}

.footer-nav h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.footer-nav ul {
    list-style: none;
}

.footer-nav li {
    margin-bottom: 0.5rem;
}

.footer-nav a {
    color: #9ca3af;
}

.footer-nav a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #6b7280;
    font-size: 0.875rem;
}

/* ========================================
   ユーティリティ
   ======================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-light); }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--error-color); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* ========================================
   走行枠カレンダー
   ======================================== */
.calendar {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-gray);
}

.calendar-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.calendar-nav {
    display: flex;
    gap: 0.5rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar-day-header {
    padding: 0.75rem;
    text-align: center;
    font-weight: 600;
    background: var(--bg-gray);
    border-bottom: 1px solid var(--border-color);
}

.calendar-day {
    min-height: 100px;
    padding: 0.5rem;
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.calendar-day:nth-child(7n) {
    border-right: none;
}

.calendar-day-number {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.calendar-day.other-month {
    background: var(--bg-gray);
    color: var(--text-light);
}

.calendar-day.today {
    background: #dbeafe;
}

.calendar-slot {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    margin-bottom: 0.25rem;
    border-radius: 4px;
    background: var(--primary-color);
    color: white;
    cursor: pointer;
}

.calendar-slot:hover {
    opacity: 0.9;
}

.calendar-slot.full {
    background: var(--text-light);
}

/* ========================================
   レスポンシブ
   ======================================== */
@media (max-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav,
    .header-actions {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 2rem 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .calendar-day {
        min-height: 60px;
    }

    .calendar-slot {
        font-size: 0.625rem;
        padding: 0.125rem 0.25rem;
    }
}