/* assets/css/style.css */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1f2937;
    --light-color: #f3f4f6;
    --text-color: #374151;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background: #fafafa;
}

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

/* Header */
.header {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.highlight {
    color: #ffd700;
}

.search-container {
    margin: 2rem 0;
    position: relative;
}

.search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-box i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    box-shadow: var(--shadow-lg);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    z-index: 1000;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary {
    background: #ffd700;
    color: #333;
}

.btn-secondary {
    background: transparent;
    border: 2px solid white;
    color: white;
}

/* Stats Section */
.stats {
    padding: 4rem 0;
    background: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
}

.stat-label {
    font-size: 1.1rem;
    color: #666;
}

/* Questions Grid */
.questions-grid, .simulations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.question-card, .simulation-card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.question-card:hover, .simulation-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.question-title {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.question-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 1rem;
}

.question-meta span {
    background: var(--light-color);
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
}

/* Ranking */
.ranking-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.ranking-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.ranking-position {
    font-size: 1.5rem;
    font-weight: bold;
    width: 60px;
    text-align: center;
}

.ranking-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    margin-right: 1rem;
}

.ranking-info {
    flex: 1;
}

.ranking-name {
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.ranking-stats {
    font-size: 0.9rem;
    color: #666;
}

.ranking-points {
    font-weight: bold;
    color: var(--primary-color);
}

/* Testimonials */
.testimonials {
    padding: 4rem 0;
    background: var(--light-color);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial-card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.testimonial-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    overflow: hidden;
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-content p {
    font-style: italic;
    margin-bottom: 1rem;
}

.testimonial-content h4 {
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    margin-bottom: 1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #444;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .questions-grid, .simulations-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading Animation */
.loading {
    text-align: center;
    padding: 2rem;
    color: #666;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}