/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body {
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;
    line-height: 1.7;
    color: #2c3e50;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    padding-bottom: 0;
    background-color: #fafbfc;
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* Flexコンテナの調整 */
body > .container {
    flex: 1 0 auto;
    display: flex;
    flex-direction: column;
}

/* コンテナ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 60px;
    }
}

/* ヘッダー */
header {
    background: linear-gradient(135deg, #1a237e 0%, #3949ab 100%);
    color: #fff;
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(26, 35, 126, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.fixed-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
    transform: translateZ(0);
    transition-property: transform;
    will-change: transform;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* スティッキーヘッダー用のスタイルを追加 */
header.sticky-header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: #1a237e;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
    }
    to {
        transform: translateY(0);
    }
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

header a {
    color: #fff;
    text-decoration: none;
}

header img {
    vertical-align: middle;
    max-height: 70px;
    width: auto;
}

/* ナビゲーション */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-nav {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 1.5rem;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #bbdefb;
}

.navbar-toggler {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
}

.navbar-toggler-icon {
    display: inline-block;
    font-size: 1.8rem;
    line-height: 1;
}

/* メインコンテンツ */
main {
    flex: 1;
    padding: 3rem 1rem 5rem 1rem;
    min-height: calc(100vh - 200px);
}

@media (max-width: 768px) {
    main {
        padding: 2rem 0.5rem 4rem 0.5rem;
    }
}

/* グリッドシステム */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -20px;
    gap: 0;
}

.col-md-6 {
    width: 50%;
    padding: 0 20px;
}

.col-md-4 {
    width: 33.333%;
    padding: 0 20px;
}

.col-md-8 {
    width: 66.666%;
    padding: 0 20px;
}

@media (max-width: 768px) {
    .row {
        margin: 0 -10px;
    }
    
    .col-md-6, .col-md-4, .col-md-8 {
        width: 100%;
        padding: 0 10px;
        margin-bottom: 1.5rem;
    }
}

/* カード */
.card {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.18);
}

.card-body {
    padding: 2rem;
}

.card-title {
    font-size: 1.35rem;
    margin-bottom: 1.2rem;
    color: #1a237e;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.4;
}

.h5 {
    font-size: 1.25rem;
}

.card-text {
    margin-bottom: 1rem;
}

/* ジャンボトロン（メインビジュアル） */
.main-jumbotron {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    padding: 3rem 2rem;
    margin-bottom: 3rem;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(33, 150, 243, 0.15);
}

.display-4 {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #ffffff;
    letter-spacing: 0.03em;
    text-shadow: 0 2px 4px rgba(26, 35, 126, 0.1);
}

@media (max-width: 768px) {
    .display-4 {
        font-size: 2.2rem;
    }
}

.lead {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: #ffffff;
    letter-spacing: 0.02em;
    line-height: 1.6;
}

.my-4 {
    margin-top: 1.5rem;
    margin-bottom: 1.5rem;
}

/* ボタン */
.btn {
    display: inline-block;
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 12px 24px;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, #1a237e 0%, #3949ab 100%);
    border-color: #1a237e;
    box-shadow: 0 4px 15px rgba(26, 35, 126, 0.3);
}

.btn-primary:hover {
    color: #fff;
    background: linear-gradient(135deg, #0d1b69 0%, #283593 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 35, 126, 0.4);
    text-decoration: none;
}

.btn-primary:active {
    transform: translateY(0);
}

/* リスト */
.list-group {
    display: flex;
    flex-direction: column;
    padding-left: 0;
    margin-bottom: 0;
    border-radius: 0.25rem;
}

.list-group-item {
    position: relative;
    display: block;
    padding: 0.75rem 1.25rem;
    background-color: #fff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.list-group-item:last-child {
    border-bottom: none;
}

.list-group-flush {
    border-radius: 0;
}

/* スペーシングユーティリティ */
.mb-2 { margin-bottom: 0.75rem; }
.mb-3 { margin-bottom: 1.25rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-2 { margin-top: 0.75rem; }
.mt-3 { margin-top: 1.25rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.py-2 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-3 { padding-top: 1.25rem; padding-bottom: 1.25rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }
.py-5 { padding-top: 3rem; padding-bottom: 3rem; }

.px-2 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-3 { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-4 { padding-left: 2rem; padding-right: 2rem; }

/* セクション間のスペーシング */
.section-spacing {
    margin-bottom: 4rem;
}

@media (max-width: 768px) {
    .section-spacing {
        margin-bottom: 2.5rem;
    }
}

/* フッター */
footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 3rem 0 2rem 0;
    text-align: center;
    width: 100%;
    z-index: 10;
    flex-shrink: 0;
    box-shadow: 0 -4px 20px rgba(44, 62, 80, 0.2);
}

footer p {
    margin-bottom: 0;
    color: #ecf0f1;
    font-size: 0.95rem;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .col-md-6 {
        width: 100%;
    }
    
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-collapse {
        width: 100%;
        margin-top: 60px;
    }
    
    .navbar-collapse.collapse {
        display: none;
    }
    
    .navbar-collapse.collapse.show {
        display: block;
    }
    
    header .col-md-6:first-child {
        display: flex;
        justify-content: center;
        padding: 10px 0;
    }
    
    header img {
        max-width: 200px;
    }
    
    .navbar-toggler {
        display: block;
        position: absolute;
        right: 20px;
        top: 20px;
        background-color: rgba(26, 35, 126, 0.8);
        border-radius: 4px;
        padding: 5px 10px;
        z-index: 1001;
        border: 1px solid rgba(255, 255, 255, 0.3);
    }
    
    .nav-item {
        margin-left: 0;
        margin-top: 0.5rem;
        padding: 0.5rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    header .row {
        flex-direction: column;
    }
    
    header .col-md-6 {
        text-align: center;
        margin-bottom: 0.5rem;
    }
    
    header .col-md-6:last-child {
        margin-top: 0;
    }
    
    footer {
        padding: 1rem 0;
    }
}

/* タイポグラフィ */
h1 {
    color: #1a237e;
    margin-bottom: 2rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    line-height: 1.3;
}

h2 {
    color: #1a237e;
    margin-bottom: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    line-height: 1.4;
}

h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

h4, h5, h6 {
    color: #34495e;
    font-weight: 600;
    letter-spacing: 0.01em;
}

p {
    margin-bottom: 1.2rem;
    line-height: 1.8;
    color: #2c3e50;
}

a {
    color: #1a237e;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

/* アクセシビリティ対応 */
a:focus, button:focus {
    outline: 2px solid #bbdefb;
}

/* フォームスタイリング */
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.form-control {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    line-height: 1.5;
    color: #2c3e50;
    background-color: #fff;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 0;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.text-danger {
    color: #e74c3c;
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 0.25rem;
    display: block;
}

/* フォームバリデーションスタイル */
.form-control.is-invalid {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
}

.form-control.is-valid {
    border-color: #27ae60;
    box-shadow: 0 0 0 3px rgba(39, 174, 96, 0.15);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    background-color: #fff;
    color: #2c3e50;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus,
.form-control:focus {
    border-color: #1a237e;
    outline: none;
    box-shadow: 0 0 0 4px rgba(26, 35, 126, 0.15), 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="tel"]:hover,
textarea:hover,
.form-control:hover {
    border-color: #3949ab;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

/* アコーディオン（よくある質問）スタイル */
.accordion-item {
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.25rem;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.accordion-header {
    margin: 0;
}

.accordion-button {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    color: #333;
    text-align: left;
    background-color: #f8f9fa;
    border: 0;
    border-radius: 0;
    overflow-anchor: none;
    cursor: pointer;
    font-weight: 500;
}

.accordion-button:not(.collapsed) {
    color: #1a237e;
    background-color: #e7e9fd;
}

.accordion-button::after {
    content: '+';
    position: absolute;
    right: 1rem;
    font-size: 1.5rem;
    transition: transform 0.2s ease-in-out;
}

.accordion-button:not(.collapsed)::after {
    content: '-';
}

.accordion-body {
    padding: 1rem;
    background-color: #fff;
    border-top: 1px solid rgba(0, 0, 0, 0.125);
}

.accordion-collapse {
    display: none;
}

.accordion-collapse.show {
    display: block;
}

/* STEPフロー削除 - custom.cssに移行 */

@media (max-width: 768px) {
    .col-md-6 {
        width: 100%;
    }
    
    .navbar {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-collapse {
        width: 100%;
        margin-top: 60px;
    }
    
    .navbar-collapse.collapse {
        display: none;
    }
    
    .navbar-collapse.collapse.show {
        display: block;
    }
    
    header .col-md-6:first-child {
        display: flex;
        justify-content: center;
        padding: 10px 0;
    }
    
    header img {
        max-width: 200px;
    }
    
    .navbar-toggler {
        display: block;
        position: absolute;
        right: 20px;
        top: 20px;
        background-color: rgba(26, 35, 126, 0.8);
        border-radius: 4px;
        padding: 5px 10px;
        z-index: 1001;
        border: 1px solid rgba(255, 255, 255, 0.3);
    }
    
    .nav-item {
        margin-left: 0;
        margin-top: 0.5rem;
        padding: 0.5rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-item:last-child {
        border-bottom: none;
    }
    
    header .row {
        flex-direction: column;
    }
    
    header .col-md-6 {
        text-align: center;
        margin-bottom: 0.5rem;
    }
    
    header .col-md-6:last-child {
        margin-top: 0;
    }
}