/* ========================================
   ERP入門サイト - メインスタイル
   ======================================== */

:root {
    --primary-color: #5c2d91;
    --primary-dark: #432069;
    --primary-light: #f3e8ff;
    --secondary-color: #0078d4;
    --accent-color: #107c10;
    --text-color: #323130;
    --text-light: #605e5c;
    --bg-color: #faf9f8;
    --white: #ffffff;
    --border-color: #edebe9;
    --success-color: #107c10;
    --warning-color: #ffb900;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
    --radius: 8px;
    --radius-lg: 12px;
}

/* Site Navigation Bar */
.site-nav {
    background: #1a1a2e;
    padding: 0 24px;
    height: 40px;
    display: flex;
    align-items: center;
}

.site-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.site-nav-brand {
    color: #a0a0b0;
    font-size: 0.8rem;
    font-weight: 500;
}

.site-nav-links {
    display: flex;
    gap: 4px;
}

.site-nav-link {
    color: #c0c0d0;
    text-decoration: none;
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 4px;
    transition: all 0.2s;
}

.site-nav-link:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.site-nav-link.active {
    background: rgba(92, 45, 145, 0.6);
    color: #fff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Hiragino Sans', 'Meiryo', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   ヘッダー・ヒーロー
   ======================================== */

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 60px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1rem;
    opacity: 0.85;
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   メインコンテンツ
   ======================================== */

main {
    padding: 40px 0;
}

section {
    margin-bottom: 60px;
}

section h2 {
    font-size: 1.75rem;
    margin-bottom: 24px;
    color: var(--text-color);
    border-left: 4px solid var(--primary-color);
    padding-left: 16px;
}

.intro p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 800px;
}

/* ========================================
   レッスンカード
   ======================================== */

.lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.lesson-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
    display: block;
}

.lesson-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.lesson-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-color);
}

.lesson-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 8px;
}

.lesson-card h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.lesson-description {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.lesson-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.lesson-status {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 24px;
    height: 24px;
}

.lesson-status.completed::after {
    content: '\2713';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--success-color);
    color: var(--white);
    border-radius: 50%;
    font-size: 14px;
    font-weight: bold;
}

/* ========================================
   特徴セクション
   ======================================== */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ========================================
   フッター
   ======================================== */

footer {
    background: var(--text-color);
    color: var(--white);
    padding: 24px 20px;
    text-align: center;
    margin-top: 40px;
}

footer p {
    opacity: 0.8;
    font-size: 0.9rem;
}

/* ========================================
   レッスンページ共通
   ======================================== */

.lesson-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 40px 20px;
}

.lesson-header .container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.back-link {
    color: var(--white);
    text-decoration: none;
    font-size: 1.5rem;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.back-link:hover {
    opacity: 1;
}

.lesson-title-group h1 {
    font-size: 1.75rem;
    margin-bottom: 4px;
}

.lesson-title-group p {
    opacity: 0.85;
}

.lesson-content {
    padding: 40px 0;
}

.lesson-section {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.lesson-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
    border-left: 4px solid var(--primary-color);
    padding-left: 16px;
}

.lesson-section h3 {
    font-size: 1.2rem;
    margin: 24px 0 12px;
    color: var(--text-color);
}

.lesson-section p {
    margin-bottom: 16px;
    color: var(--text-light);
}

/* ========================================
   インタラクティブ要素
   ======================================== */

.interactive-area {
    background: var(--bg-color);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin: 24px 0;
    min-height: 200px;
}

.interactive-area.active {
    border-color: var(--primary-color);
    border-style: solid;
}

/* ドラッグ&ドロップ */
.sortable-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sortable-item {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px 20px;
    cursor: grab;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    user-select: none;
}

.sortable-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.sortable-item:active {
    cursor: grabbing;
}

.sortable-item.dragging {
    opacity: 0.5;
    transform: scale(1.02);
}

.sortable-item .drag-handle {
    color: var(--text-light);
    font-size: 1.2rem;
}

.sortable-item .step-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--primary-light);
    border-radius: 50%;
}

.sortable-item .step-text {
    flex: 1;
    font-weight: 500;
}

.sortable-item.correct {
    border-color: var(--success-color);
    background: #f0fff0;
}

.sortable-item.incorrect {
    border-color: #d13438;
    background: #fff0f0;
}

/* ボタン */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-light);
}

.btn-success {
    background: var(--success-color);
    color: var(--white);
}

.btn-group {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    flex-wrap: wrap;
}

/* 結果表示 */
.result-message {
    padding: 16px 24px;
    border-radius: var(--radius);
    margin-top: 24px;
    display: none;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.result-message.show {
    display: flex;
}

.result-message.success {
    background: #dff6dd;
    color: #107c10;
    border: 1px solid #107c10;
}

.result-message.error {
    background: #fde7e9;
    color: #d13438;
    border: 1px solid #d13438;
}

.result-icon {
    font-size: 1.5rem;
}

/* ========================================
   マッチング演習
   ======================================== */

.matching-container {
    display: flex;
    gap: 40px;
    margin: 24px 0;
}

.matching-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.matching-column h4 {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-color);
}

.matching-item {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    padding: 12px 16px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.matching-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.matching-item.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.matching-item.matched {
    border-color: var(--warning-color);
    background: #fff9e6;
}

.matching-item.correct {
    border-color: var(--success-color);
    background: #dff6dd;
}

.matching-item.incorrect {
    border-color: #d13438;
    background: #fde7e9;
}

/* ========================================
   モジュール選択シミュレータ
   ======================================== */

.module-simulator {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.simulator-header {
    background: var(--primary-color);
    color: var(--white);
    padding: 16px 24px;
}

.simulator-header h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.simulator-header p {
    font-size: 0.9rem;
    opacity: 0.85;
}

.simulator-body {
    padding: 24px;
}

.scenario-card {
    background: var(--bg-color);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.scenario-card h5 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.scenario-card p {
    font-size: 0.9rem;
    color: var(--text-light);
}

.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
    margin-top: 20px;
}

.module-item {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.module-item:hover {
    border-color: var(--primary-color);
}

.module-item.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.module-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.module-name {
    font-size: 0.9rem;
    font-weight: 500;
}

.result-panel {
    background: var(--bg-color);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 20px;
    display: none;
}

.result-panel.show {
    display: block;
}

.result-panel h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--primary-color);
}

.result-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.metric-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ========================================
   データフローシミュレータ
   ======================================== */

.flow-simulator {
    background: #1e1e1e;
    border-radius: var(--radius-lg);
    padding: 24px;
    color: #d4d4d4;
}

.flow-step {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: #2d2d30;
    border-radius: var(--radius);
    margin-bottom: 8px;
    opacity: 0.5;
    transition: all 0.3s;
}

.flow-step.active {
    opacity: 1;
    border: 2px solid var(--primary-color);
}

.flow-step.completed {
    opacity: 1;
    border: 2px solid var(--success-color);
}

.flow-number {
    background: var(--primary-color);
    color: var(--white);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.flow-arrow {
    text-align: center;
    color: #6a6a6a;
    padding: 8px;
    font-size: 1.5rem;
}

.flow-data-display {
    background: #252526;
    border-radius: var(--radius);
    padding: 16px;
    margin-top: 16px;
    font-family: monospace;
    font-size: 0.85rem;
}

/* ========================================
   クイズ
   ======================================== */

.quiz-container {
    max-width: 700px;
    margin: 0 auto;
}

.quiz-progress {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.quiz-progress-bar {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.quiz-progress-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s;
}

.quiz-progress-text {
    font-size: 0.9rem;
    color: var(--text-light);
}

.quiz-question {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
}

.quiz-question h3 {
    font-size: 1.25rem;
    margin-bottom: 24px;
    color: var(--text-color);
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quiz-option {
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.quiz-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.quiz-option.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.quiz-option.correct {
    border-color: var(--success-color);
    background: #dff6dd;
}

.quiz-option.incorrect {
    border-color: #d13438;
    background: #fde7e9;
}

.quiz-result {
    text-align: center;
    padding: 40px;
}

.quiz-result-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.quiz-result h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.quiz-score {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 24px 0;
}

/* ========================================
   比較テーブル
   ======================================== */

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.comparison-table th {
    background: var(--primary-color);
    color: var(--white);
    padding: 16px;
    text-align: left;
    font-weight: 500;
}

.comparison-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:nth-child(even) {
    background: var(--bg-color);
}

/* ========================================
   ナビゲーション
   ======================================== */

.lesson-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.lesson-nav a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 12px 20px;
    border-radius: var(--radius);
    transition: background-color 0.2s;
}

.lesson-nav a:hover {
    background: var(--primary-light);
}

/* ========================================
   アニメーション
   ======================================== */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes celebrate {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(92, 45, 145, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(92, 45, 145, 0); }
}

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

.animate-shake {
    animation: shake 0.3s ease;
}

.animate-celebrate {
    animation: celebrate 0.5s ease;
}

.animate-pulse {
    animation: pulse 1.5s infinite;
}

/* ========================================
   レスポンシブ
   ======================================== */

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .lesson-grid {
        grid-template-columns: 1fr;
    }

    .matching-container {
        flex-direction: column;
        gap: 24px;
    }

    .module-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-metrics {
        grid-template-columns: 1fr;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .lesson-header .container {
        flex-direction: column;
        text-align: center;
    }

    .comparison-table {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
    }
}