/* ========================================
   資料一覧ページ
======================================== */
.documents-intro {
    padding: 60px 0;
    text-align: center;
}

.documents-intro__text {
    font-size: 16px;
    color: var(--accent-gray);
    line-height: 1.9;
    max-width: 700px;
    margin: 0 auto;
}

/* 資料カードグリッド */
.documents-grid {
    padding: 0 0 100px;
}

.documents-grid__list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.doc-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(10, 18, 60, 0.06);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.doc-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 50px rgba(10, 18, 60, 0.12);
}

/* サムネイル代替（CSSビジュアル） */
.doc-card__visual {
    height: 180px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.doc-card__visual--service {
    background: linear-gradient(155deg, #0a1240 0%, var(--primary-color) 50%, var(--primary-light) 100%);
}

.doc-card__visual--no1 {
    background: linear-gradient(155deg, #0d1a3f 0%, #1c2d6a 50%, #2a4080 100%);
}

.doc-card__visual--keyman {
    background: linear-gradient(155deg, #060b24 0%, #101e50 50%, var(--primary-light) 100%);
}

.doc-card__visual--case {
    background: linear-gradient(155deg, #0a1240 0%, #1a2858 50%, #2a3a7c 100%);
}

.doc-card__visual--company {
    background: linear-gradient(155deg, #080e30 0%, var(--primary-color) 60%, #2a4080 100%);
}

.doc-card__visual::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -15%;
    width: 200px;
    height: 200px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

/* ドキュメントアイコン（CSS） */
.doc-card__icon {
    position: relative;
    z-index: 1;
    width: 56px;
    height: 68px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.doc-card__icon::before {
    content: 'PDF';
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1px;
}

/* 折れ角 */
.doc-card__icon::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 14px;
    height: 14px;
    background: rgba(255, 255, 255, 0.1);
    border-bottom-left-radius: 4px;
}

/* カードコンテンツ */
.doc-card__body {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.doc-card__category {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary-color);
    background: rgba(10, 18, 60, 0.05);
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 12px;
    width: fit-content;
}

.doc-card__title {
    font-size: 17px;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1.5;
    margin-bottom: 10px;
}

.doc-card__desc {
    font-size: 13px;
    color: var(--accent-gray);
    line-height: 1.8;
    margin-bottom: 20px;
    flex: 1;
}

.doc-card__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 12px;
    color: var(--accent-gray);
    margin-bottom: 20px;
}

.doc-card__meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.doc-card__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 700;
    transition: all 0.3s;
}

.doc-card__link:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(10, 18, 60, 0.2);
}

.doc-card__link-arrow {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-top: 2px solid #fff;
    border-right: 2px solid #fff;
    transform: rotate(45deg);
}

/* ========================================
   資料ダウンロードページ
======================================== */
.dl-page {
    padding: 80px 0 100px;
}

.dl-page__layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 960px;
    margin: 0 auto;
}

/* 資料プレビュー側 */
.dl-preview {
    position: sticky;
    top: 120px;
}

.dl-preview__visual {
    height: 300px;
    background: linear-gradient(155deg, #0a1240 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 24px;
}

.dl-preview__visual::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 300px;
    height: 300px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 50%;
}

.dl-preview__icon {
    position: relative;
    z-index: 1;
    width: 80px;
    height: 100px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dl-preview__icon::before {
    content: 'PDF';
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1px;
}

.dl-preview__icon::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 18px;
    height: 18px;
    background: rgba(255, 255, 255, 0.1);
    border-bottom-left-radius: 6px;
}

.dl-preview__title {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.dl-preview__desc {
    font-size: 14px;
    color: var(--accent-gray);
    line-height: 1.9;
    margin-bottom: 16px;
}

.dl-preview__contents {
    background: var(--light-gray);
    border-radius: 10px;
    padding: 24px;
}

.dl-preview__contents-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.dl-preview__contents-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.dl-preview__contents-list li {
    font-size: 13px;
    color: var(--accent-gray);
    line-height: 1.8;
    padding-left: 16px;
    position: relative;
}

.dl-preview__contents-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    background: var(--primary-light);
    border-radius: 50%;
}

/* フォーム側 */
.dl-form {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 4px 24px rgba(10, 18, 60, 0.06);
}

.dl-form__title {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.dl-form__subtitle {
    font-size: 13px;
    color: var(--accent-gray);
    margin-bottom: 28px;
}

.dl-form__group {
    margin-bottom: 20px;
}

.dl-form__label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 6px;
}

.dl-form__label .required {
    color: #e53e3e;
    font-size: 11px;
    margin-left: 4px;
}

.dl-form__input,
.dl-form__select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    color: #333;
    background: #fff;
    transition: border-color 0.3s;
    font-family: inherit;
}

.dl-form__input:focus,
.dl-form__select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(10, 18, 60, 0.08);
}

.dl-form__input::placeholder {
    color: #bbb;
}

.dl-form__privacy {
    margin: 24px 0;
    padding: 16px;
    background: var(--light-gray);
    border-radius: 8px;
}

.dl-form__privacy-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--accent-gray);
    line-height: 1.6;
    cursor: pointer;
}

.dl-form__privacy-check input[type="checkbox"] {
    margin-top: 3px;
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
}

.dl-form__privacy-check a {
    color: var(--primary-color);
    text-decoration: underline;
}

.dl-form__submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

.dl-form__submit:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(10, 18, 60, 0.2);
}

.dl-form__submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.dl-form__note {
    margin-top: 16px;
    font-size: 12px;
    color: var(--accent-gray);
    line-height: 1.6;
    text-align: center;
}

/* ========================================
   レスポンシブ
======================================== */
@media (max-width: 991px) {
    .documents-grid__list {
        grid-template-columns: 1fr 1fr;
    }

    .dl-page__layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .dl-preview {
        position: static;
    }
}

@media (max-width: 767px) {
    .documents-grid__list {
        grid-template-columns: 1fr;
    }

    .dl-form {
        padding: 28px 20px;
    }

    .dl-preview__visual {
        height: 200px;
    }

    .documents-intro {
        padding: 40px 0;
    }
}