/* 要件定義書専用スタイル */
.requirements-main {
    background: #f8f9fa;
    min-height: 100vh;
    padding-top: 70px;
}

.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 60px 0;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 目次 */
.requirements-toc {
    background: white;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #667eea;
}

.requirements-toc h3 {
    color: #333;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.requirements-toc ul {
    list-style: none;
    padding: 0;
}

.requirements-toc li {
    margin-bottom: 10px;
}

.requirements-toc a {
    color: #667eea;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 8px;
    display: block;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.requirements-toc a:hover {
    background: #f0f2ff;
    border-left-color: #667eea;
    transform: translateX(5px);
}

/* セクション */
.req-section {
    margin-bottom: 60px;
}

.req-section h2 {
    color: #333;
    font-size: 2rem;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 3px solid #667eea;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-number {
    background: #667eea;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: bold;
}

.content-card {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
}

/* 背景・目的セクション */
.purpose, .scope {
    margin-bottom: 30px;
}

.purpose h3, .scope h3 {
    color: #667eea;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
}

.purpose p, .scope p {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #555;
}

/* 成果物グリッド */
.deliverable-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.deliverable-item {
    text-align: center;
    padding: 30px 20px;
    border: 2px solid #e9ecef;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.deliverable-item:hover {
    border-color: #667eea;
    transform: translateY(-5px);
}

.deliverable-item i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}

.deliverable-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.deliverable-item p {
    color: #666;
    line-height: 1.6;
}

/* KPIグリッド */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.kpi-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: 15px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.kpi-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.kpi-item.quantity {
    border-color: #28a745;
}

.kpi-item.quality {
    border-color: #ffc107;
}

.kpi-item.conversion {
    border-color: #fd7e14;
}

.kpi-item.efficiency {
    border-color: #6f42c1;
}

.kpi-item i {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.kpi-item.quantity i { color: #28a745; }
.kpi-item.quality i { color: #ffc107; }
.kpi-item.conversion i { color: #fd7e14; }
.kpi-item.efficiency i { color: #6f42c1; }

.kpi-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.kpi-item p {
    color: #666;
    line-height: 1.5;
}

/* RACIテーブル */
.raci-note {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 30px;
    border-left: 4px solid #667eea;
}

.table-container {
    overflow-x: auto;
}

.raci-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.raci-table th,
.raci-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid #e9ecef;
}

.raci-table th {
    background: #667eea;
    color: white;
    font-weight: 600;
}

.raci-table td:first-child {
    text-align: left;
    font-weight: 500;
    color: #333;
}

.role-r { background: #28a745; color: white; padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; }
.role-a { background: #dc3545; color: white; padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; }
.role-c { background: #ffc107; color: #333; padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; }
.role-i { background: #6c757d; color: white; padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; }
.role-ac { background: #fd7e14; color: white; padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; }
.role-ra { background: #17a2b8; color: white; padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; }

/* システム構成グリッド */
.system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.system-item {
    padding: 25px;
    border: 2px solid #e9ecef;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.system-item:hover {
    border-color: #667eea;
    transform: translateY(-3px);
}

.system-item i {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 15px;
}

.system-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.system-item ul {
    list-style: none;
    padding-left: 0;
}

.system-item li {
    margin-bottom: 8px;
    color: #666;
    padding-left: 15px;
    position: relative;
}

.system-item li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #667eea;
}

/* 機能要件セクション */
.functional-sections {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.func-section h3 {
    color: #667eea;
    font-size: 1.5rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f2ff;
}

.input-requirements {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.required-inputs, .optional-inputs {
    padding: 25px;
    border-radius: 10px;
}

.required-inputs {
    background: #fff5f5;
    border-left: 4px solid #dc3545;
}

.optional-inputs {
    background: #f8f9fa;
    border-left: 4px solid #6c757d;
}

.required-inputs h4 {
    color: #dc3545;
    margin-bottom: 15px;
}

.optional-inputs h4 {
    color: #6c757d;
    margin-bottom: 15px;
}

/* プロセスフロー */
.process-flow {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.process-step {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 15px;
    padding: 25px;
    transition: all 0.3s ease;
}

.process-step:hover {
    border-color: #667eea;
    transform: translateX(10px);
}

.process-step.highlight {
    background: linear-gradient(135deg, #fff5f5, #f0f2ff);
    border-color: #667eea;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.step-header i {
    font-size: 1.8rem;
    color: #667eea;
}

.step-header h4 {
    color: #333;
    font-size: 1.3rem;
    margin: 0;
}

.process-step ul {
    list-style: none;
    padding-left: 0;
}

.process-step li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
    color: #555;
    line-height: 1.5;
}

.process-step li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: #667eea;
}

/* 出力リスト */
.output-list ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.output-list li {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.output-list li:hover {
    background: #f0f2ff;
    transform: translateX(5px);
}

.output-list i {
    font-size: 1.5rem;
    color: #667eea;
}

/* 非機能要件グリッド */
.non-func-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.non-func-item {
    padding: 25px;
    border: 2px solid #e9ecef;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.non-func-item:hover {
    border-color: #667eea;
    transform: translateY(-5px);
}

.non-func-item i {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 15px;
}

.non-func-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.non-func-item p {
    color: #666;
    line-height: 1.5;
}

/* インターフェースグリッド */
.interface-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.interface-item {
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.interface-item:hover {
    background: white;
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.interface-item i {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 15px;
}

.interface-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.interface-item p {
    color: #666;
    line-height: 1.5;
}

/* チェックリスト */
.checklist {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    border-left: 5px solid #28a745;
}

.checklist h3 {
    color: #333;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.checklist-items {
    list-style: none;
    padding: 0;
}

.checklist-items li {
    background: white;
    padding: 15px 20px;
    margin-bottom: 10px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.checklist-items li:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.checklist-items i {
    color: #28a745;
    font-size: 1.2rem;
}

/* 制約グリッド */
.constraints-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.constraint-item {
    padding: 25px;
    border-radius: 15px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.constraint-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.constraint-item.risk {
    border-color: #ffc107;
    background: #fffbf0;
}

.constraint-item i {
    font-size: 2rem;
    margin-bottom: 15px;
}

.constraint-item.risk i {
    color: #ffc107;
}

.constraint-item:not(.risk) i {
    color: #667eea;
}

.constraint-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.constraint-item p {
    color: #666;
    line-height: 1.5;
}

/* コストグリッド */
.cost-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.cost-item {
    padding: 25px;
    background: #f8f9fa;
    border-radius: 15px;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.cost-item:hover {
    background: white;
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.cost-item i {
    font-size: 2.5rem;
    color: #667eea;
    margin-bottom: 15px;
}

.cost-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.cost-item p {
    color: #666;
    line-height: 1.5;
}

/* タイムライン */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #667eea;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: flex;
    align-items: flex-start;
    gap: 30px;
}

.timeline-marker {
    background: #667eea;
    color: white;
    padding: 10px 15px;
    border-radius: 25px;
    font-weight: bold;
    min-width: 80px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.timeline-marker::before {
    content: '';
    position: absolute;
    left: -23px;
    top: 50%;
    transform: translateY(-50%);
    width: 15px;
    height: 15px;
    background: #667eea;
    border-radius: 50%;
    border: 3px solid white;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #667eea;
}

.timeline-content h3 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.timeline-content p {
    color: #666;
    line-height: 1.5;
    margin: 0;
}

/* 受入基準 */
.acceptance-criteria {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.criteria-item {
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.criteria-item.success {
    background: #f0fff4;
    border: 2px solid #28a745;
}

.criteria-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.criteria-item i {
    font-size: 2.5rem;
    color: #28a745;
    margin-bottom: 15px;
}

.criteria-item h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.criteria-item p {
    color: #666;
    line-height: 1.5;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
        flex-direction: column;
        gap: 10px;
    }

    .input-requirements {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 0;
    }

    .timeline::before {
        display: none;
    }

    .timeline-item {
        flex-direction: column;
        gap: 15px;
    }

    .timeline-marker::before {
        display: none;
    }

    .content-card {
        padding: 25px;
    }

    .req-section h2 {
        font-size: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}