/* ===== 基本設定 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: #333;
    background-color: #f5f5f5;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== ヘッダー ===== */
.header {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    padding: 30px 0;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.header-subtitle {
    font-size: 18px;
    font-weight: 400;
    opacity: 0.95;
}

/* ===== メインビジュアル ===== */
.hero {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    padding: 60px 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 26px;
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 25px;
    line-height: 1.6;
}

.hero-text {
    font-size: 16px;
    color: #555;
    margin-bottom: 35px;
    line-height: 1.9;
}

.hero-text strong {
    color: #1e3a8a;
    font-size: 18px;
    font-weight: 700;
}

.message-link {
    margin-top: 25px;
}

.btn-message {
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    color: white;
    font-size: 16px;
    padding: 14px 35px;
}

.btn-message:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(124, 58, 237, 0.4);
}

.hero-cta {
    margin-top: 20px;
}

/* ===== ボタン ===== */
.btn {
    display: inline-block;
    padding: 16px 40px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn i {
    margin-right: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.4);
}

.btn-form {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-form:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
}

/* ===== セクション ===== */
.section {
    padding: 60px 0;
    background: white;
}

.section:nth-child(even) {
    background: #f9fafb;
}

.section-title {
    font-size: 26px;
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 40px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.section-title i {
    font-size: 28px;
}

/* ===== 会場カード ===== */
.venue-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    margin-bottom: 30px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.venue-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.venue-header {
    padding: 20px 25px;
    color: white;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.venue-header.kanto {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.venue-header.kansai {
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
}

.venue-header i {
    font-size: 24px;
}

.venue-header h3 {
    font-size: 22px;
    font-weight: 700;
    flex: 1;
}

.venue-badge {
    background: rgba(255,255,255,0.2);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.venue-body {
    padding: 30px 25px;
}

.info-row {
    display: flex;
    gap: 18px;
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px solid #e5e7eb;
}

.info-row:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.info-row > i {
    font-size: 20px;
    color: #3b82f6;
    width: 24px;
    flex-shrink: 0;
    margin-top: 3px;
}

.info-content {
    flex: 1;
}

.info-content strong {
    display: block;
    font-size: 15px;
    color: #1e3a8a;
    margin-bottom: 6px;
    font-weight: 700;
}

.info-content p {
    font-size: 15px;
    color: #555;
    line-height: 1.7;
}

.venue-link {
    color: #1e3a8a;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 1px dashed #3b82f6;
}

.venue-link:hover {
    color: #3b82f6;
    border-bottom: 1px solid #3b82f6;
}

.map-icon {
    font-size: 12px;
    color: #3b82f6;
    margin-left: 4px;
}

.sub-text {
    font-size: 13px !important;
    color: #888 !important;
    margin-top: 4px;
}

/* ===== 参加費セクション ===== */
.fee-section {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.fee-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.fee-card {
    background: white;
    border-radius: 15px;
    padding: 35px 25px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 3px solid transparent;
}

.fee-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.fee-card.highlight {
    border-color: #f59e0b;
    position: relative;
}

.fee-card.highlight::before {
    content: '年会費納入済の方';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #f59e0b;
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}

.fee-type {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
    font-weight: 500;
}

.fee-amount {
    font-size: 38px;
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 18px;
}

.fee-amount .tax {
    font-size: 14px;
    color: #888;
    font-weight: 400;
}

.fee-description {
    font-size: 14px;
    color: #555;
    line-height: 1.8;
}

.fee-note {
    background: white;
    border-left: 4px solid #f59e0b;
    padding: 20px 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.fee-note p {
    font-size: 14px;
    color: #555;
    margin-bottom: 8px;
    line-height: 1.7;
}

.fee-note p:last-child {
    margin-bottom: 0;
}

.fee-note i {
    color: #f59e0b;
}

/* ===== 出欠フォームセクション ===== */
.form-section {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
}

.form-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.form-text {
    font-size: 16px;
    color: #555;
    margin-bottom: 30px;
    line-height: 1.8;
}

.form-button-wrapper {
    margin: 35px 0;
}

.deadline {
    background: white;
    padding: 18px 25px;
    border-radius: 10px;
    display: inline-block;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    font-size: 16px;
    color: #dc2626;
}

.deadline i {
    margin-right: 8px;
}

/* ===== お問い合わせセクション ===== */
.contact-section {
    background: white;
}

.contact-info {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-org {
    font-size: 20px;
    font-weight: 700;
    color: #1e3a8a;
    margin-bottom: 25px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 17px;
}

.contact-item i {
    font-size: 20px;
    color: #3b82f6;
    width: 24px;
}

.contact-item a {
    color: #1e3a8a;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #3b82f6;
    text-decoration: underline;
}

/* ===== 備考セクション ===== */
.notes-section {
    background: #f9fafb;
}

.notes-content {
    max-width: 800px;
    margin: 0 auto;
}

.note-item {
    display: flex;
    gap: 18px;
    background: white;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: box-shadow 0.3s ease;
}

.note-item:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.note-item:last-child {
    margin-bottom: 0;
}

.note-item i {
    font-size: 22px;
    color: #3b82f6;
    flex-shrink: 0;
    margin-top: 3px;
}

.note-item p {
    font-size: 15px;
    color: #555;
    line-height: 1.8;
}

/* ===== フッター ===== */
.footer {
    background: #1f2937;
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer-org {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-text {
    font-size: 15px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.footer-copy {
    font-size: 13px;
    opacity: 0.7;
}

/* ===== レスポンシブ対応 ===== */
@media (max-width: 768px) {
    .header-title {
        font-size: 24px;
    }
    
    .header-subtitle {
        font-size: 16px;
    }
    
    .hero {
        padding: 40px 0;
    }
    
    .hero-title {
        font-size: 22px;
    }
    
    .hero-text {
        font-size: 15px;
    }
    
    .section {
        padding: 40px 0;
    }
    
    .section-title {
        font-size: 22px;
    }
    
    .btn {
        padding: 14px 30px;
        font-size: 16px;
        width: 100%;
        max-width: 100%;
    }
    
    .venue-header h3 {
        font-size: 19px;
    }
    
    .venue-badge {
        position: absolute;
        top: -8px;
        right: 15px;
        font-size: 11px;
        padding: 4px 10px;
    }
    
    .fee-cards {
        grid-template-columns: 1fr;
    }
    
    .fee-amount {
        font-size: 32px;
    }
    
    .contact-items {
        align-items: flex-start;
    }
    
    .contact-item {
        justify-content: flex-start;
        font-size: 15px;
    }
    
    .pc-only {
        display: none;
    }
}

@media (min-width: 769px) {
    .pc-only {
        display: inline;
    }
}

/* ===== スムーススクロール ===== */
html {
    scroll-behavior: smooth;
}