body {
    font-family: "Open Sans", "Noto Sans JP", "游ゴシック体", "Yu Gothic", YuGothic, sans-serif;
    font-size: 20px;
    font-weight: 400;
    font-style: normal;
    line-height: 1.8;
}

i {
    margin-right: 8px;
    font-size: 1.4em;
}

i.fa-circle-question {
    color: #777;
}

i.fa-lightbulb {
    color: #f7b731;
    font-size: 1.6em;
}

p {
    margin-bottom: 1.8em;
}

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

hr {
    margin: 3.6em 0;
}

.container {
    max-width: 960px;
}

dl dt,
dl dd {
    margin-top: 0.8em;
}
dl dd {
    padding-left: 2em;
}

/* ヘッダーセクション */
#header-pre .container,
#header-main .container {
    max-width: 960px;
}
#header-pre {
    background: #933;
    color: #fff;
    font-size: 0.8em;
    font-weight: bold;
    text-align: center;
    padding: 0.6em 0;
}

#header-main {
    padding: 1.8em 0;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    text-align: center;
}

#header-copy {
    font-size: 1.4em;
    font-weight: bold;
    line-height: 1.4;
}

#header-subcopy {
    font-size: 1em;
    /* margin-bottom: 1.2em; */
    padding: 2.4em 0;
}

#header-list {
    font-size: 0.9em;
    margin-bottom: 30px;
    line-height: 1.8;
    margin-bottom: 1.2em;
}

.box-area {
    border: 1px solid #fff;
    border-radius: 6px;
    padding: 0.8em;
    background: rgba(255, 255, 255, 0.1);
}

.box-area-title {
    font-weight: bold;
    border-bottom: 1px solid #fff;
    padding-bottom: 0.4em;
    margin-bottom: 0.8em;
}

#header form .form-control,
#header form .btn {
    height: 2.8em;
    font-size: 1.1em;
}

#header img {
    width: 100%;
    /* border-radius: 8px; */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* メインコンテンツ */
/* #main {
    padding: 3.6em 1em;
} */

.section-body {
    padding: 2.4em 0;
}

h2 {
    padding: 1.4em 0;
    background: #2980b9;
    color: #fff;
    text-align: center;
    font-size: 2.0em;
    font-weight: bold;
    line-height: 1.6;
    margin: 0;
}

h3 {
    border-top: 2px solid #555;
    border-bottom: 2px solid #555;
    padding: 0.8em 0 0.8em;
    margin: 3.6em 0 1.2em;
    font-size: 1.6em;
    font-weight: bold;
    line-height: 1.6;
    text-align: center;
}

h3 .sub {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7em;
    color: #f33;
    margin-top: 0.6em;
}

/* 登録フォームエリア */
.register-form-area {
    background: #555;
    color: #fff;
    padding: 1.8em;
    /* margin: 2.4em 0 0; */
    /* border-radius: 8px; */
}

.register-form-area h3 {
    color: #fff;
    border: none;
    margin-top: 0;
    margin-bottom: 0;
    font-size: 1.4em;
    text-align: left;
}

.register-benefits {
    border: 2px solid #fff;
    padding: 1.2em;
    font-size: 0.8em;
}

.register-form-area .register-form {
    margin-top: 1.2em;
}

.register-form-area .register-form input[type="text"],
.register-form-area .register-form input[type="email"] {
    font-size: 1.1em;
    padding: 0.6em;
}

.register-form-area .register-form .btn {
    font-size: 1.2em;
    font-weight: bold;
    padding: 0.8em 0;
    background: #f39c12;
    border: none;
    transition: background 0.3s;
}

.register-form-area .register-form .btn:hover {
    background: #e67e22;
}

.register-form-area small {
    font-size: 0.85em;
    line-height: 1.6;
    display: block;
    margin-top: 1em;
}

/* 課題セクション */
.problem-section {
    background: #f8f9fa;
    padding: 2em;
    margin: 2em 0;
    border-left: 4px solid #2980b9;
    border-radius: 4px;
}

.problem-section h3 {
    margin-top: 0;
    font-size: 1.3em;
    text-align: left;
    border: none;
}

/* 武器セクション */
.weapon-section {
    background: #fff;
    padding: 1.5em;
    margin: 1.5em 0;
    border: 2px solid #2980b9;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.weapon-section h3 {
    margin-top: 0;
    font-size: 1.3em;
    text-align: left;
    border: none;
    color: #2980b9;
}

/* プロフィールセクション */
.profile-section {
    max-width: 720px;
    background: #f8f9fa;
    padding: 2em;
    margin: 3em auto;
    border-radius: 8px;
}

.profile-name {
    font-size: 1.4em;
    font-weight: bold;
    text-align: center;
}
.profile-image {
    text-align: center;
    margin: 1.2em 0;
    padding: 1.2em;
    background: #e9ecef;
    border-radius: 8px;
}

.profile-image p {
    margin: 0;
    color: #666;
    font-style: italic;
}

/* チェックリスト */
.checklist {
    list-style: none;
    padding-left: 0;
}

.checklist li {
    padding-left: 1.5em;
    position: relative;
    margin-bottom: 0.8em;
}

.checklist li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #27ae60;
    font-weight: bold;
}

.crosslist {
    list-style: none;
    padding-left: 0;
}

.crosslist li {
    padding-left: 1.5em;
    position: relative;
    margin-bottom: 0.8em;
}

.crosslist li:before {
    content: "✗";
    position: absolute;
    left: 0;
    color: #e74c3c;
    font-weight: bold;
}

/* 追伸セクション */
.ps-section {
    max-width: 720px;
    margin: 0 auto;
    padding: 2.4em 0;
}
.ps-header {
    font-size: 1.8em;
    font-weight: bold;
    line-height: 1.8;
    padding-bottom: 0.4em;
    border-bottom: 3px solid #555;
}
.ps-body {
    padding: 1.6em 0;
}
.ps-name {
    text-align: right;
    font-weight: bold;
}

/* フッター */
footer {
    background: #333;
    color: #fff;
    font-size: 0.8em;
    text-align: center;
    padding: 2em 1em;
}

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

footer a:hover {
    text-decoration: underline;
}

/* 強調 */
strong {
    font-size: 1.2em;
    font-weight: bold;
}
.red {
    color: #f33;
}

.market {
    font-weight: bold;
    background: linear-gradient(transparent 50%, rgba(255, 250, 128, .8) 50%);
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    body {
        font-size: 16px;
    }

    h2 {
        font-size: 1.4em;
        padding: 0.6em;
    }

    h3 {
        font-size: 1.3em;
    }

    #header-copy {
        font-size: 1.4em;
    }

    #header-main {
        padding: 1.5em 1em;
    }

    #main {
        padding: 2em 1em;
    }

    .register-form-area {
        padding: 1.2em;
    }

    .problem-section,
    .profile-section {
        padding: 1.5em;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }

    #header-copy {
        font-size: 1.2em;
    }

    h2 {
        font-size: 1.2em;
    }

    h3 {
        font-size: 1.1em;
    }
}