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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e6e9f0 100%);
    color: #333;
    overflow-x: hidden;
}

/* Hero Section */
.hero-container {
    height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #4e54c8 0%, #8f94fb 100%);
    overflow: hidden;
}

.stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
}

.stars::before,
.stars::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: twinkle 2s infinite;
    box-shadow: 
        10px 20px white,
        30px 50px white,
        60px 30px white,
        80px 70px white,
        120px 40px white,
        150px 80px white,
        200px 20px white,
        250px 60px white,
        300px 100px white,
        350px 30px white;
}

.stars::after {
    animation-delay: 1s;
    transform: translateX(100px);
}

@keyframes twinkle {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}

.logo-container {
    margin-bottom: 2rem;
}

.logo-container i {
    font-size: 4rem;
    color: #fff;
    margin-bottom: 1rem;
    display: block;
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(45deg, #fff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.ai-text {
    color: #ffd700;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { text-shadow: 0 0 20px rgba(255, 215, 0, 0.5); }
    to { text-shadow: 0 0 30px rgba(255, 215, 0, 0.8); }
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    animation: fadeInUp 1s ease-out 0.5s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cta-buttons {
    display: flex;
    gap: 2rem;
    margin-bottom: 4rem;
    animation: fadeInUp 1s ease-out 0.7s both;
}

.cta-primary, .cta-secondary {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.cta-primary {
    background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
    color: white;
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.3);
}

.cta-primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.5);
}

.cta-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.cta-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.7);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.mouse {
    width: 20px;
    height: 32px;
    border: 2px solid rgba(255, 255, 255, 0.7);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 2px;
    height: 6px;
    background: rgba(255, 255, 255, 0.7);
    margin: 6px auto;
    border-radius: 1px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(10px); }
}

/* Days Section */
.days-section, .weeks-section, .course-section {
    padding: 5rem 0;
    position: relative;
    background: #f8fafc;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 4rem;
    position: relative;
}

.title-underline {
    width: 100px;
    height: 4px;
    background: linear-gradient(45deg, #4e54c8, #8f94fb);
    margin: 1rem auto;
    border-radius: 2px;
    animation: expandLine 1s ease-out;
}

@keyframes expandLine {
    from { width: 0; }
    to { width: 100px; }
}

.days-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.day-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.day-card:not(.locked):hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.day-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(45deg, #4e54c8, #8f94fb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.day-status {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
}

.day-status.available {
    background: linear-gradient(45deg, #4e54c8, #8f94fb);
    animation: availablePulse 2s infinite;
}

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

.day-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, #f5f7fa, #e6e9f0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: #4e54c8;
}

.card-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.7rem;
    color: #2d3748;
    line-height: 1.3;
}

.card-content p {
    color: #718096;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.card-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.card-stats span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #718096;
    background: #f7fafc;
    padding: 0.4rem 0.8rem;
    border-radius: 30px;
}

.btn-open {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(45deg, #4e54c8, #8f94fb);
    color: white;
}

.btn-open:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(78, 84, 200, 0.3);
}

.day-card.available:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

/* Stats Section */
.stats-section {
    background: linear-gradient(135deg, #4e54c8 0%, #8f94fb 100%);
    padding: 5rem 0;
    color: white;
}

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

.stat-card {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: scale(1.05);
}

.stat-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .days-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}