/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.25rem;
}

.tagline {
    font-size: 0.875rem;
    color: #666;
    font-weight: 400;
}

.nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    background: transparent;
    color: #666;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
}

.nav-btn.active {
    background: #667eea;
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 600;
    color: white;
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
}

/* Benchmark Controls */
.benchmark-controls {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.test-configuration h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.config-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.config-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
}

.config-option input[type="radio"] {
    accent-color: #667eea;
}

.start-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    min-width: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.start-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Test Categories */
.test-categories {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.test-category {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.test-category:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.category-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
}

.category-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.25rem;
}

.category-info p {
    color: #666;
    font-size: 0.875rem;
}

.category-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 200px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    transition: width 0.5s ease;
    width: 0%;
}

.category-score {
    text-align: center;
    min-width: 80px;
}

.score-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
}

.score-label {
    font-size: 0.75rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Overall Score */
.overall-score {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    margin-top: 2rem;
}

.overall-score h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1.5rem;
}

.composite-score {
    margin-bottom: 2rem;
}

.composite-value {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.composite-label {
    font-size: 1.125rem;
    color: #666;
    font-weight: 500;
}

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

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #f8fafc;
    border-radius: 8px;
}

.breakdown-label {
    font-weight: 500;
    color: #666;
}

.breakdown-value {
    font-weight: 700;
    color: #667eea;
}

/* Device Info */
.device-info {
    display: grid;
    gap: 2rem;
}

.device-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
}

.device-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1.5rem;
}

.device-details {
    display: grid;
    gap: 1rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid #e5e7eb;
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    font-weight: 500;
    color: #666;
}

.detail-value {
    font-weight: 600;
    color: #333;
}

/* Manual Entry Form */
.manual-entry {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
}

.manual-entry h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.manual-entry p {
    color: #666;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: #333;
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
}

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

/* Leaderboard */
.leaderboard-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.leaderboard-filters select {
    padding: 0.75rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.95);
    color: #333;
    font-size: 1rem;
}

.leaderboard-list,
.results-content {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 2rem;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.leaderboard-placeholder,
.results-placeholder {
    text-align: center;
    color: #666;
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: 1rem 0;
    margin-top: 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
    color: #666;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav {
        width: 100%;
        justify-content: center;
    }

    .nav-btn {
        flex: 1;
        text-align: center;
    }

    .main-content {
        padding: 1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .benchmark-controls {
        flex-direction: column;
        text-align: center;
    }

    .category-progress {
        min-width: auto;
        width: 100%;
    }

    .test-category {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .composite-value {
        font-size: 3rem;
    }

    .score-breakdown {
        grid-template-columns: 1fr;
    }

    .leaderboard-filters {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.5rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .composite-value {
        font-size: 2.5rem;
    }

    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* Animation Classes */
.animate-score {
    animation: scoreCount 1s ease-out;
}

@keyframes scoreCount {
    from { transform: scale(1.2); }
    to { transform: scale(1); }
}

.animate-progress {
    animation: progressGlow 2s ease-in-out infinite alternate;
}

@keyframes progressGlow {
    from { box-shadow: 0 0 5px rgba(102, 126, 234, 0.3); }
    to { box-shadow: 0 0 20px rgba(102, 126, 234, 0.6); }
}