/* Reset và Base Styles */
* {
    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;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    margin-top: 20px;
    margin-bottom: 20px;
}

/* Header Styles */
header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #000000 0%, #30005d 100%);
    border-radius: 10px;
    margin-bottom: 40px;
    color: white;
    position: relative;
}

.year-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #ff9ff3;
    color: #2d3436;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.logo {
    font-size: 3.5em;
    font-weight: bold;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    background: linear-gradient(45deg, #ffeaa7, #fab1a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header h1 {
    font-size: 2.2em;
    margin-bottom: 30px;
    font-weight: 300;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta-btn {
    padding: 15px 30px;
    font-size: 1.2em;
    font-weight: bold;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-width: 250px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.cta-drama {
    background: linear-gradient(45deg, #e84393, #fd79a8);
    color: white;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.3);
}

.cta-btn:active {
    transform: translateY(-1px);
}

/* Section Styles */
section {
    margin-bottom: 50px;
    padding: 0 20px;
}

h2 {
    font-size: 2.2em;
    margin-bottom: 20px;
    color: #2d3436;
    text-align: center;
    background: linear-gradient(45deg, #6c5ce7, #a29bfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h3 {
    font-size: 1.6em;
    margin: 30px 0 15px 0;
    color: #e84393;
}

p {
    font-size: 1.1em;
    margin-bottom: 15px;
    color: #636e72;
    line-height: 1.8;
}

.highlight {
    background: linear-gradient(45deg, #ffeaa7, #fab1a0);
    padding: 2px 8px;
    border-radius: 5px;
    font-weight: bold;
    color: #2d3436;
}

/* Stats Container */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.stat-box {
    background: linear-gradient(135deg, #74b9ff, #0984e3);
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    color: white;
    box-shadow: 0 5px 15px rgba(116, 185, 255, 0.3);
    transition: transform 0.3s ease;
}

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

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.feature-box {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.feature-box:hover {
    border-color: #e84393;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3em;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.4em;
    font-weight: bold;
    margin-bottom: 15px;
    color: #2d3436;
}

.feature-box p {
    font-size: 1em;
    color: #636e72;
}

/* Comparison Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-radius: 10px;
    overflow: hidden;
}

thead {
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
}

th {
    padding: 20px;
    text-align: left;
    color: white;
    font-weight: bold;
    font-size: 1.1em;
}

td {
    padding: 15px 20px;
    border-bottom: 1px solid #dfe6e9;
}

tbody tr:nth-child(even) {
    background: #f8f9fa;
}

tbody tr:hover {
    background: #e3f2fd;
}

/* FAQ Styles */
.faq-item {
    background: #f8f9fa;
    margin-bottom: 15px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

.faq-question {
    padding: 20px;
    background: linear-gradient(135deg, #fd79a8, #e84393);
    color: white;
    font-weight: bold;
    font-size: 1.1em;
    cursor: pointer;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: linear-gradient(135deg, #e84393, #fd79a8);
}

.faq-answer {
    padding: 20px;
    background: white;
    display: block;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    background: #2d3436;
    color: white;
    border-radius: 10px;
    margin-top: 50px;
}

footer p {
    color: #dfe6e9;
    margin-bottom: 10px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        padding: 15px;
    }
    
    header {
        padding: 30px 15px;
    }
    
    .logo {
        font-size: 2.5em;
    }
    
    header h1 {
        font-size: 1.6em;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-btn {
        min-width: 200px;
        font-size: 1.1em;
        padding: 12px 25px;
    }
    
    h2 {
        font-size: 1.8em;
    }
    
    h3 {
        font-size: 1.4em;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .stat-box {
        padding: 20px 15px;
    }
    
    .stat-number {
        font-size: 2em;
    }
    
    table {
        font-size: 0.9em;
    }
    
    th, td {
        padding: 12px 15px;
    }
}

@media (max-width: 480px) {
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .logo {
        font-size: 2em;
    }
    
    header h1 {
        font-size: 1.3em;
    }
    
    .year-badge {
        position: static;
        display: inline-block;
        margin-bottom: 10px;
    }
}

/* Animation cho các elements */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-box, .stat-box, .faq-item {
    animation: fadeInUp 0.6s ease-out;
}

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

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

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #e84393, #fd79a8);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #fd79a8, #e84393);
}