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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}


/* Navigation */
nav {
    background: linear-gradient(135deg, #4db8a8 0%, #3d7a5e 100%);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
    cursor: pointer;
}

nav a:hover {
    opacity: 0.8;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    margin-right: auto;
    color: white;
}



/* Pages */
.page {
    display: none;
    min-height: 100vh;
    padding-top: 60px;
}

.page.active {
    display: block;
}

/* Home Page */
.hero {
    background: linear-gradient(135deg, #4db8a8 0%, #3d7a5e 100%);
    color: white;
    padding: 120px 2rem 80px;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease-out;
}
.hero-logo {
    width : 400px;
    height: 400px;
    margin: 2rem auto;
    animation: fadeInUp .8s ease-out 0.2s backwards;
    filter: drop-shadow(0 8px 20px rgba(0,0,0,0.3));

}
.hero-tagline {
    font-size:1.7rem;
    margin-bottom: 2.1rem;
    opacity: 1;
    animation: fadeInUp 0.8s ease-out 0.3s backwards;
    font-style: italic;
    font-weight: 500;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.cta-button {
    background: white;
    color: #4db8a8;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.features {
    padding: 80px 2rem;
    background: #f8f9fa;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #4db8a8;
}

/* Presentation Page */
.presentation-hero {
    background: linear-gradient(135deg, #4db8a8 0%, #3d7a5e 100%);
    color: white;
    padding: 120px 2rem 80px;
    text-align: center;
}

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

.presentation-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 80px 2rem;
    background: white;
}

.iframe-content {
    position: relative;
    width: 100%;
    padding-bottom: 60%;
    height: 0;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.iframe-content iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}


.slide {
    background: white;
    padding: 3rem;
    margin-bottom: 3rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    animation: slideIn 0.6s ease-out;
}

.slide h2 {
    color: #f5576c;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    border-left: 5px solid #f5576c;
    padding-left: 1rem;
}

.slide p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #555;
}

.slide ul {
    margin-left: 2rem;
    margin-top: 1rem;
}

.slide li {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
    color: #555;
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    nav ul {
        gap: 1rem;
    }

    .features h2, .presentation-hero h1 {
        font-size: 2rem;
    }
}
.team-hero {
    background: linear-gradient(135deg, #4db8a8 0%, #3d7a5e 100%);
    color: white;
    padding: 120px 2rem 80px;
    text-align: center;
}
.team-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}
.team-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 2rem;
    background: #f8f9fa;
}
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}
.team-mem {
    background: white;
    padding: 2rem;
    border-radius: 18px;
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}
.team-mem:hover {
    transform: translateY(-11px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}
.team-mem-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    background: linear-gradient(140deg, #4db8a8 0%, #3d7a5e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}
.team-mem h3 {
    color: #4db8a8;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.team-mem .role {
    color: #4db8a8;
    font-weight: 500;
    margin-bottom: 1rem;
}
.team-mem p {
    color: #666;
    line-height: 1.6;
}
.team-mem-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}
.trashtag-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 55px 2rem;
    background: white;
}
.trashtag-section h2 {
    font-size: 2.6rem;
    color: #4db8a8;
    margin-top: 3rem;
    margin-bottom: 2rem;
    border-left: 5px solid #4db8a8;
    padding-left: 1rem;
}
.trashtag-section h3 {
    font-size: 2.1rem;
    color: #3d7a5e;
    margin-top: 2rem;
    margin-bottom: 1rem;
}
.trashtag-section p {
    font-size: 1.5rem;
    line-height: 1.8;
    margin-bottom:1.6rem;
    color: #555;
}
.feature-card p {
    color: #666;
    line-height: 1.6;
}
.presentation-item {
    background: white;
    padding: 1.5rem;
    margin-bottom: 2.8rem;
    border-radius: 17px;
    box-shadow: 0 5px 18px rgba(0,0,0,0.1);
    text-align: center;
}
.presentation-item h3 {
    color:#4db8a8;
    font-size: 1.9rem;
    margin-bottom: 1.1rem;
}
.presentation-link {
    display: inline-block;
    background: #4db8a8;
    color: white;
    padding: 1.1rem 2.1rem;
    border-radius: 53px;
    text-decoration: none;
    margin-top: 1rem;
    transition: background 0.5s;
}
.presentation-link:hover {
    background: #3d7a5e;
}
.references-item, .glossery-item {
    background: white;
    padding: 1.8rem;
    margin-bottom: 1.8rem;
    border-radius: 13px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.09);
}
.glossary-term {
    font-weight: 680;
    color: #4db8a8;
    font-size: 1.5rem;
    margin-bottom: 0.8rem;

}
.footer-links {
    background: #2c3e50;
    color: white;
    padding: 2rem;
    text-align: center;
}
.footer-links a {
    color: #4db8a8;
    text-decoration: none;
    margin: 1 1.02rem;
    transition: opacity 0.5s;
}

.deliverables-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.deliverable-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}
.deliverable-card h3 {
    color: #4db8a8;
    font-size: 1.5rem;
    margin-bottom:1rem;
}
.deliverable-image {
    width: 100%;
    border-radius: 10px;
    margin: 1rem 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}
.deliverable-link {
    display: inline-block;
    background: #4db8a8;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    margin-top: 1rem;
    transition: background 0.3s;

}

.lab-section {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.lab-section h3 {
    color: #4db8a8;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid #4db8a8;
    padding-left: 1rem;
}
.submission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}
.submission-card {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 15px;
    border-left: 5px solid #4db8a8;
}
.submission-card h4 {
    color: #333;
    margin-bottom: 1rem;
}
.submission-link {
    color: #4db8a8;
    text-decoration: none;
    font-weight: 500;
}

.dropdown-content {
    display: none;
    max-height: 400px;
    overflow-y: auto;
}

.dropdown-content.show {
    display: block;
}

.dropdown-button {
    background-color: #3d7a5e;
    color: white;
    padding: 16px;
    font-size: 14px;
    border: none;
    cursor: pointer;
}

.dropdown-button:hover, .dropdown-button:focus {
    background-color: #274e3d;
}