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

:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --card-bg: #2d2d2d;
    --accent-bg: #3a3a3a;
    --primary-color: #00d4ff;
    --secondary-color: #ff6b6b;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #404040;
    --success-color: #00ff88;
    --warning-color: #ffaa00;
    --danger-color: #ff4444;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.4);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: var(--secondary-bg);
    border-radius: 20px;
    padding: 25px 35px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

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

.logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    gap: 15px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #0099cc);
    color: var(--text-primary);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), #e55555);
    color: var(--text-primary);
    box-shadow: 0 5px 15px rgba(255, 107, 107, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

/* Sections */
section {
    background: var(--secondary-bg);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--text-primary);
    position: relative;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    border-radius: 2px;
}

/* Search Section */
.search-container {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.search-input-wrapper {
    flex: 1;
    position: relative;
}

.search-input-wrapper i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
}

#phoneSearch {
    width: 100%;
    padding: 16px 20px 16px 55px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

#phoneSearch:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

#phoneSearch::placeholder {
    color: var(--text-muted);
}

/* Search Results */
.search-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.phone-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 25px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.phone-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.phone-card:hover::before {
    transform: scaleX(1);
}

.phone-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.phone-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.phone-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.phone-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--success-color);
}

.phone-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--accent-bg);
    border-radius: 8px;
}

.spec-item i {
    color: var(--primary-color);
    width: 16px;
}

.spec-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.spec-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* Comparison Section */
.comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.comparison-controls {
    display: flex;
    gap: 15px;
}

.comparison-table {
    min-height: 400px;
}

.empty-comparison {
    text-align: center;
    color: var(--text-muted);
    padding: 80px 20px;
}

.empty-comparison i {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--border-color);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 200px repeat(auto-fit, minmax(250px, 1fr));
    gap: 2px;
    background: var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.comparison-cell {
    background: var(--card-bg);
    padding: 15px;
    display: flex;
    align-items: center;
    min-height: 50px;
}

.comparison-header-cell {
    background: var(--accent-bg);
    font-weight: 700;
    color: var(--text-primary);
}

.comparison-phone-header {
    background: var(--primary-color);
    color: var(--primary-bg);
    font-weight: 700;
    text-align: center;
    position: relative;
}

.remove-phone-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--primary-bg);
    width: 25px;
    height: 25px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.remove-phone-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Charts Section */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.chart-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 25px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.chart-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.chart-card h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: 600;
}

.chart-card canvas {
    max-height: 250px;
}

/* Quick Compare Section */
.quick-phones-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.quick-phone-card {
    background: linear-gradient(135deg, var(--card-bg), var(--accent-bg));
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 25px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.quick-phone-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.quick-phone-card:hover::before {
    opacity: 1;
}

.quick-phone-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.quick-phone-card .phone-name {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.quick-phone-card .phone-price {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.performance-score {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--accent-bg);
    border-radius: 25px;
    padding: 8px 16px;
    margin-top: 15px;
}

.score-badge {
    background: var(--success-color);
    color: var(--primary-bg);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--secondary-bg);
    margin: 5% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

.close {
    color: var(--text-muted);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-primary);
}

/* Form Styles */
form {
    padding: 30px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* Performance Details */
.performance-details {
    padding: 30px;
    max-height: 70vh;
    overflow-y: auto;
}

.performance-category {
    margin-bottom: 30px;
}

.performance-category h4 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
}

.performance-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--card-bg);
    border-radius: 8px;
    margin-bottom: 10px;
}

.performance-bar {
    width: 100px;
    height: 8px;
    background: var(--accent-bg);
    border-radius: 4px;
    overflow: hidden;
}

.performance-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    transition: width 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .comparison-header {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .quick-phones-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .comparison-grid {
        grid-template-columns: 150px repeat(auto-fit, minmax(200px, 1fr));
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--accent-bg);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #00a8cc, #00cc66);
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Utilities */
.text-center {
    text-align: center;
}

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

.text-success {
    color: var(--success-color);
}

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

.text-danger {
    color: var(--danger-color);
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}

.highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--success-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}