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

:root {
    --primary-color: #6366f1;
    --secondary-color: #ec4899;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --text-color: #374151;
    --border-color: #e5e7eb;
}

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

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    position: relative;
    overflow: hidden;
    padding: 20px;
}

.hero::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    bottom: -80px;
    left: -80px;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(30px); }
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 10;
    animation: fadeInDown 1s ease-out;
    max-width: 900px;
    margin: 0 auto;
}

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

.uni-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 1px;
    color: white;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.uni-subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    margin-bottom: 40px;
    color: rgba(255,255,255,0.95);
    letter-spacing: 0.5px;
}

.event-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 15px;
    text-shadow: 0 4px 12px rgba(0,0,0,0.25);
    letter-spacing: 2px;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta-button {
    padding: 15px 40px;
    font-size: 1.1rem;
    background-color: white;
    color: #6366f1;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* ===== EVENT DETAILS SECTION ===== */
.details-section {
    padding: 80px 20px;
    background-color: white;
    animation: fadeInUp 1s ease-out;
}

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

.details-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.details-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.8;
}

.event-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto;
}

.detail-card {
    background: linear-gradient(135deg, #f0f4ff 0%, #fdf2f8 100%);
    padding: 35px 28px;
    border-radius: 18px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.detail-card:hover {
    transform: translateY(-10px);
    border-color: #6366f1;
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.12);
}

.detail-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.detail-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--dark-color);
}

.detail-card p {
    font-size: 1rem;
    color: var(--text-color);
    margin: 0;
}

.detail-desc {
    margin-top: 8px;
}

/* Small register buttons inside cards */
.small-register-btn {
    margin-top: 15px;
    padding: 10px 20px;
    font-size: 0.95rem;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    background-color: #6366f1;
    color: white;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
    transition: all 0.25s ease;
}

.small-register-btn:hover {
    background-color: #4f46e5;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.4);
}

/* ===== REGISTER SECTION ===== */
.register-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    text-align: center;
    color: white;
    animation: fadeIn 1s ease-out;
}

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

.register-section h2 {
    font-size: 2.8rem;
    margin-bottom: 30px;
    font-weight: 700;
}

.register-button {
    padding: 18px 50px;
    font-size: 1.3rem;
    background-color: white;
    color: #6366f1;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 700;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    display: inline-block;
    margin-top: 20px;
}

.register-button:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.register-button:active {
    transform: scale(0.98);
}

/* ===== CONTACT SECTION ===== */
.contact-section {
    padding: 60px 20px;
    background-color: white;
    text-align: center;
}

.contact-title {
    font-size: 2rem;
    margin-bottom: 40px;
    color: #1f2937;
}

.contact-grid {
    max-width: 700px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.contact-card h3 {
    color: #6366f1;
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.contact-card p {
    color: #374151;
    margin: 0;
    font-size: 1rem;
}

.developer-credit {
    margin-top: 40px;
    color: #111827;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .event-title {
        font-size: 2.5rem;
    }

    .uni-title {
        font-size: 1.7rem;
    }

    .uni-subtitle {
        font-size: 1rem;
    }

    .tagline {
        font-size: 1.2rem;
    }

    .details-section h2,
    .register-section h2 {
        font-size: 2rem;
    }

    .detail-card {
        padding: 30px 20px;
    }

    .detail-icon {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .event-title {
        font-size: 2rem;
    }

    .uni-title {
        font-size: 1.4rem;
    }

    .uni-subtitle {
        font-size: 0.95rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .cta-button,
    .register-button {
        padding: 12px 30px;
        font-size: 1rem;
    }

    .details-section,
    .register-section {
        padding: 50px 20px;
    }

    .details-section h2,
    .register-section h2 {
        font-size: 1.8rem;
    }

    .detail-card {
        padding: 25px 15px;
    }

    .detail-icon {
        font-size: 2rem;
    }
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}