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

:root {
    --primary-color: #0078d4;
    --primary-dark: #005a9e;
    --primary-light: #e6f2ff;
    --secondary-color: #107c10;
    --accent-color: #ffb900;
    --text-color: #323130;
    --text-light: #605e5c;
    --bg-color: #faf9f8;
    --white: #ffffff;
    --border-color: #edebe9;
    --success-color: #107c10;
    --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;
}

* {
    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: '✓';
    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;
}

/* ========================================
   PAD シミュレーター
   ======================================== */

.pad-simulator {
    background: #1e1e1e;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.pad-header {
    background: #2d2d30;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.pad-header .window-controls {
    display: flex;
    gap: 8px;
}

.pad-header .window-controls span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.pad-header .window-controls .close { background: #ff5f56; }
.pad-header .window-controls .minimize { background: #ffbd2e; }
.pad-header .window-controls .maximize { background: #27ca3f; }

.pad-header .title {
    color: #ccc;
    font-size: 0.85rem;
}

.pad-body {
    display: grid;
    grid-template-columns: 200px 1fr 250px;
    height: 400px;
}

.pad-actions-panel {
    background: #252526;
    border-right: 1px solid #3c3c3c;
    padding: 12px;
    overflow-y: auto;
}

.pad-actions-panel h4 {
    color: #9cdcfe;
    font-size: 0.8rem;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.pad-action-item {
    background: #3c3c3c;
    color: #d4d4d4;
    padding: 8px 12px;
    border-radius: 4px;
    margin-bottom: 4px;
    font-size: 0.85rem;
    cursor: grab;
    transition: background-color 0.2s;
}

.pad-action-item:hover {
    background: #4c4c4c;
}

.pad-canvas {
    background: #1e1e1e;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
}

.pad-canvas-placeholder {
    color: #6a6a6a;
    text-align: center;
    padding: 40px;
    border: 2px dashed #3c3c3c;
    border-radius: var(--radius);
}

.pad-flow-item {
    background: #2d2d30;
    border: 1px solid #3c3c3c;
    border-radius: 4px;
    padding: 12px 16px;
    color: #d4d4d4;
    display: flex;
    align-items: center;
    gap: 12px;
}

.pad-flow-item .flow-number {
    background: var(--primary-color);
    color: var(--white);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
}

.pad-properties {
    background: #252526;
    border-left: 1px solid #3c3c3c;
    padding: 12px;
}

.pad-properties h4 {
    color: #9cdcfe;
    font-size: 0.8rem;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.pad-property-group {
    margin-bottom: 16px;
}

.pad-property-group label {
    display: block;
    color: #9cdcfe;
    font-size: 0.75rem;
    margin-bottom: 4px;
}

.pad-property-group input,
.pad-property-group select {
    width: 100%;
    background: #3c3c3c;
    border: 1px solid #4c4c4c;
    color: #d4d4d4;
    padding: 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.pad-run-btn {
    background: var(--success-color);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-weight: 500;
    margin-top: 20px;
}

.pad-run-btn:hover {
    background: #0e6b0e;
}

/* ========================================
   ファイルシステムシミュレーター
   ======================================== */

.file-simulator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.file-panel {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.file-panel-header {
    background: var(--bg-color);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-list {
    padding: 12px;
    min-height: 200px;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.file-item:hover {
    background: var(--primary-light);
}

.file-item.selected {
    background: var(--primary-light);
    border: 2px solid var(--primary-color);
}

.file-item .file-icon {
    font-size: 1.25rem;
}

.file-item .file-name {
    flex: 1;
}

/* ========================================
   進捗バー
   ======================================== */

.progress-bar {
    background: var(--border-color);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin: 20px 0;
}

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

/* ========================================
   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); }
}

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

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

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

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

/* ========================================
   自動化分析セクション
   ======================================== */

.automation-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.automation-step-item {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    transition: all 0.3s ease;
}

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

.automation-step-item .step-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.automation-step-item .step-icon {
    font-size: 1.5rem;
}

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

.automation-step-item .step-buttons {
    display: flex;
    gap: 8px;
}

.auto-btn {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--white);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.auto-btn:hover {
    border-color: var(--primary-color);
}

.auto-btn.can-automate:hover,
.auto-btn.can-automate.selected {
    background: #e8f5e9;
    border-color: var(--success-color);
    color: var(--success-color);
}

.auto-btn.cannot-automate:hover,
.auto-btn.cannot-automate.selected {
    background: #fff3e0;
    border-color: #ff9800;
    color: #e65100;
}

.step-selected {
    margin-top: 8px;
    font-size: 0.85rem;
    font-weight: 500;
}

.selected-auto {
    color: var(--success-color);
}

.selected-manual {
    color: #e65100;
}

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

.automation-step-item.incorrect-answer {
    border-color: #ff9800;
    background: #fffbf0;
}

/* フィードバック */
.automation-feedback {
    padding: 20px;
    border-radius: var(--radius);
    margin-top: 16px;
    border: 2px solid;
}

.automation-feedback.correct {
    background: #e8f5e9;
    border-color: var(--success-color);
}

.automation-feedback.incorrect {
    background: #fff3e0;
    border-color: #ff9800;
}

.feedback-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.feedback-icon {
    font-size: 1.25rem;
}

.feedback-title {
    font-weight: 600;
    font-size: 1.1rem;
}

.automation-feedback.correct .feedback-icon,
.automation-feedback.correct .feedback-title {
    color: var(--success-color);
}

.automation-feedback.incorrect .feedback-icon,
.automation-feedback.incorrect .feedback-title {
    color: #e65100;
}

.feedback-text {
    color: var(--text-color);
    line-height: 1.7;
}

.feedback-text em {
    display: block;
    margin-top: 8px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 4px;
    font-style: normal;
    color: var(--primary-dark);
}

/* まとめ */
.automation-summary {
    margin-top: 24px;
    padding: 24px;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
}

.automation-summary h3 {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.summary-grid-small {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.summary-item {
    padding: 16px;
    border-radius: var(--radius);
}

.summary-item.good {
    background: #e8f5e9;
    border: 1px solid var(--success-color);
}

.summary-item.bad {
    background: #ffebee;
    border: 1px solid #ef5350;
}

.summary-header {
    font-weight: 600;
    margin-bottom: 8px;
}

.summary-item ul {
    margin-left: 16px;
    font-size: 0.9rem;
}

.summary-item li {
    margin-bottom: 4px;
}

.rpa-hint {
    background: var(--primary-light);
    padding: 16px;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary-color);
}

.rpa-hint strong {
    display: block;
    margin-bottom: 8px;
}

.rpa-hint p {
    margin: 0;
    color: var(--text-color);
}

@media (max-width: 768px) {
    .summary-grid-small {
        grid-template-columns: 1fr;
    }

    .auto-btn {
        padding: 8px 12px;
        font-size: 0.8rem;
    }
}

/* ========================================
   レスポンシブ（メイン）
   ======================================== */

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

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

    .pad-body {
        grid-template-columns: 1fr;
        height: auto;
    }

    .pad-actions-panel,
    .pad-properties {
        border: none;
        border-bottom: 1px solid #3c3c3c;
    }

    .file-simulator {
        grid-template-columns: 1fr;
    }

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

    .btn {
        width: 100%;
    }
}