/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ヘッダー */
header {
    text-align: center;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

header h1 {
    color: #4a5568;
    margin-bottom: 10px;
    font-size: 2.5rem;
    font-weight: 700;
}

header h1 i {
    color: #667eea;
    margin-right: 15px;
}

header p {
    color: #718096;
    font-size: 1.1rem;
}

header code {
    background: #e2e8f0;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #e53e3e;
}

/* メインコンテンツ */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 入力セクション */
.input-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group label {
    font-weight: 600;
    color: #4a5568;
    font-size: 1.1rem;
}

.input-container {
    display: flex;
    gap: 15px;
    align-items: center;
}

#url-input {
    flex: 1;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

#url-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* ボタン */
.btn {
    padding: 15px 25px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #e53e3e 0%, #c53030 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(229, 62, 62, 0.3);
}

.btn-secondary {
    background: #718096;
    color: white;
}

.btn-secondary:hover {
    background: #4a5568;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* プログレスセクション */
.progress-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 15px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 4px;
    animation: progress-animation 2s ease-in-out infinite;
}

@keyframes progress-animation {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(0%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    color: #4a5568;
    font-weight: 600;
}

/* 統計セクション */
.stats-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    border-radius: 10px;
    background: #f7fafc;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-item.valid {
    background: linear-gradient(135deg, #48bb78, #38a169);
    color: white;
}

.stat-item.warning {
    background: linear-gradient(135deg, #ed8936, #dd6b20);
    color: white;
}

.stat-item.error {
    background: linear-gradient(135deg, #e53e3e, #c53030);
    color: white;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 1rem;
    font-weight: 600;
    opacity: 0.9;
}

/* 結果セクション */
.results-section {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px;
    border-bottom: 1px solid #e2e8f0;
    background: #f7fafc;
}

.results-header h2 {
    color: #4a5568;
    font-size: 1.5rem;
}

.results-header h2 i {
    color: #667eea;
    margin-right: 10px;
}

.results-content {
    padding: 25px;
}

.log-container {
    max-height: 500px;
    overflow-y: auto;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    background: #f7fafc;
}

.log-placeholder {
    text-align: center;
    padding: 50px;
    color: #718096;
}

.log-placeholder i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: #a0aec0;
}

.log-entry {
    padding: 15px;
    border-bottom: 1px solid #e2e8f0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.4;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-entry.success {
    background: rgba(72, 187, 120, 0.1);
    color: #22543d;
}

.log-entry.warning {
    background: rgba(237, 137, 54, 0.1);
    color: #7b341e;
}

.log-entry.error {
    background: rgba(229, 62, 62, 0.1);
    color: #742a2a;
}

.log-entry.info {
    background: rgba(102, 126, 234, 0.1);
    color: #2d3748;
}

/* フッター */
footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .input-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .results-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}