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

:root {
    --primary-color: #0052cc;
    --primary-hover: #0747a6;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f7fafc;
    --card-bg: #ffffff;
    --text-primary: #172b4d;
    --text-secondary: #6b778c;
    --border-color: #dfe1e6;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

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

header {
    background-color: var(--card-bg);
    padding: 2rem 0;
    text-align: center;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), #0065ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}

.language-selector {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.lang-btn:hover {
    background-color: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.input-section {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.tab-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    transition: color 0.2s;
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

.tab-content {
    animation: fadeIn 0.3s ease-in;
}

.hidden {
    display: none !important;
}

.url-input-wrapper {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.url-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.url-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.analyze-btn {
    padding: 0.75rem 2rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

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

.note {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.headers-input-wrapper label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.headers-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    transition: border-color 0.2s;
}

.headers-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.results-section {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.results-section h2 {
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
    font-weight: 600;
}

.results-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.result-tab-btn {
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.result-tab-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.score-card {
    text-align: center;
    margin-bottom: 2rem;
}

.score-circle {
    position: relative;
    width: 150px;
    height: 150px;
    margin: 0 auto 1rem;
}

.circular-chart {
    width: 150px;
    height: 150px;
    transform: rotate(-90deg);
}

.circle-bg {
    fill: none;
    stroke: #e5e7eb;
    stroke-width: 3;
}

.circle {
    fill: none;
    stroke-width: 3;
    stroke-linecap: round;
    transition: stroke-dasharray 0.5s ease-in-out;
}

.score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    font-weight: 700;
}

.score-label {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.overview-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: 8px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.score-good {
    color: var(--success-color);
}

.score-warning {
    color: var(--warning-color);
}

.score-bad {
    color: var(--danger-color);
}

.security-check {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: box-shadow 0.2s;
}

.security-check:hover {
    box-shadow: var(--shadow);
}

.check-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.check-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-badge.status-good {
    background-color: #d1fae5;
    color: #065f46;
}

.status-badge.status-warning {
    background-color: #fed7aa;
    color: #92400e;
}

.status-badge.status-bad {
    background-color: #fee2e2;
    color: #991b1b;
}

.check-value {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    padding: 0.5rem;
    background-color: var(--bg-color);
    border-radius: 4px;
    word-break: break-all;
}

.check-recommendation {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.check-recommendation strong {
    color: var(--text-primary);
}

.headers-table {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.header-row {
    display: grid;
    grid-template-columns: 250px 1fr;
    border-bottom: 1px solid var(--border-color);
}

.header-row:last-child {
    border-bottom: none;
}

.header-key {
    padding: 1rem;
    font-weight: 600;
    background-color: var(--bg-color);
    border-right: 1px solid var(--border-color);
}

.header-value {
    padding: 1rem;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    word-break: break-all;
}

.info-section {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.info-section h2 {
    margin-bottom: 1rem;
    font-size: 1.75rem;
    font-weight: 600;
}

.info-section h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.info-section p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.security-headers-list {
    list-style: none;
    margin-left: 0;
}

.security-headers-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.security-headers-list li:last-child {
    border-bottom: none;
}

.security-headers-list strong {
    color: var(--primary-color);
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    .url-input-wrapper {
        flex-direction: column;
    }
    
    .header-row {
        grid-template-columns: 1fr;
    }
    
    .header-key {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .overview-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}