body {
    margin:0;
    padding:0
}
:root {
    --primary: #1a3a63;
    --secondary: #4a90e2;
    --accent: #27ae60;
    --light: #f8f9fa;
    --dark: #212529;
}

body {
    font-family: 'Poppins', sans-serif;
    color: #333;
    line-height: 1.6;
}

h1, h2, h3, h4, h5 {
    font-family: 'Roboto Slab', serif;
    font-weight: 700;
}
.hero {
    
    background-image: url('image/room.jpg');
    background-size: cover; 
    background-position: center; 
    background-repeat: no-repeat;
    color: white;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
}

    .hero::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 60%;
        background: rgba(0, 0, 0, 0.5);
    }

.section-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 30px;
}

    .section-title::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 80px;
        height: 4px;
        background: var(--accent);
        border-radius: 2px;
    }

    .section-title.center::after {
        left: 50%;
        transform: translateX(-50%);
    }

.card {
    border: none;
    border-radius: 10px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    }

.speaker-card .img-container {
    height: 250px;
    overflow: hidden;
}

.speaker-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.speaker-card:hover img {
    transform: scale(1.1);
}

.schedule-item {
    border-left: 3px solid var(--secondary);
    padding-left: 20px;
    margin-bottom: 30px;
    position: relative;
}

    .schedule-item::before {
        content: "";
        position: absolute;
        left: -8px;
        top: 5px;
        width: 13px;
        height: 13px;
        border-radius: 50%;
        background: var(--accent);
    }

.time-badge {
    background: var(--accent);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    border: none;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s;
}

    .btn-primary:hover {
        background: var(--secondary);
        transform: translateY(-3px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

.btn-register {
    background: var(--accent);
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s;
}

    .btn-register:hover {
        background: #219653;
        transform: translateY(-3px);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

.navbar {
    background: rgba(26, 58, 99, 0.95) !important;
    backdrop-filter: blur(10px);
    padding: 15px 0;
    transition: all 0.4s;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.8rem;
}

.nav-link {
    font-weight: 500;
    margin: 0 10px;
    position: relative;
}

    .nav-link::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--accent);
        transition: width 0.3s;
    }

    .nav-link:hover::after {
        width: 100%;
    }

.countdown-box {
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    margin: 10px;
    backdrop-filter: blur(5px);
}

.countdown-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
}

.countdown-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

footer {
    background: var(--dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 20px;
}

    .footer-title::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 50px;
        height: 3px;
        background: var(--accent);
    }

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: white;
    margin-right: 10px;
    transition: all 0.3s;
}

    .social-icon:hover {
        background: var(--accent);
        transform: translateY(-3px);
    }