body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    background-color: #F8F9FA;
    color: #212529;
    line-height: 1.6;
}

#gradient-canvas {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: -2;
    opacity: 0.15;
}

h1, h2, h3 {
    text-align: center;
}

h1 {
    font-size: 50px;
    margin-bottom: 15px;
    font-weight: 700;
    letter-spacing: -1px;
}

h2 {
    font-size: 40px;
    margin-bottom: 40px;
}

p {
    font-size: 16px;
    color: #6C757D;
}

.intro-p {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 50px auto;
    font-size: 17px;
    line-height: 1.7;
}

.section {
    padding: 80px 5%;
    max-width: 1150px;
    margin: 0 auto;
    border-bottom: 1px solid #DEE2E6;
}

.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    border-bottom: 1px solid #DEE2E6;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.075);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    margin: 0 auto;
    max-width: 1150px;
}

.logo-svg {
    height: 35px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 25px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #212529;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s ease-in-out;
    white-space: nowrap;
}

.nav-links a:hover {
    color: #0077CC;
    background-color: rgba(0, 119, 204, 0.07);
}

.nav-links a.active {
    color: #0077CC;
    box-shadow: 0 0 0 2px #0077CC;
}

.hero-content p {
    text-align: center;
    font-size: 18px;
    margin-top: 10px;
}

.image-box {
    margin: 30px auto 0;
    max-width: 100%;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.075);
    border: 1px solid #DEE2E6;
    border-radius: 10px;
    transition: all 0.2s ease-in-out;
}

.image-box:hover {
    transform: scale(1.03);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.image-box img {
    width: 100%;
    display: block;
    border-radius: 9px;
}

.card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 25px;
}

.info-card {
    background: #FFFFFF;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.075);
    cursor: pointer;
    border-radius: 10px;
    border: 1px solid #DEE2E6;
    padding: 40px 25px;
    text-align: center;
    transition: all 0.3s ease-in-out;
}

.info-card i {
    font-size: 36px;
    color: #0077CC;
    margin-bottom: 20px;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
}

.info-card.active {
    border-color: #0077CC;
    box-shadow: 0 8px 32px rgba(0, 119, 204, 0.25);
    min-height: 320px;
}

.info-card h3 {
    margin: 0 0 10px 0;
    color: #0077CC;
    font-size: 20px;
}

.info-card p {
    margin: 0;
    padding: 0;
    max-height: 0;
    opacity: 0;
    font-size: 16px; 
    color: #6C757D;
    transition: all 0.4s ease-in-out;
}

.info-card.active p {
    padding-top: 10px;
    max-height: 500px;
    opacity: 1;
}

.contact-box {
    background: #FFFFFF;
    border: 1px solid #DEE2E6;
    border-radius: 10px;
    padding: 30px 40px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.075);
}
.contact-box:hover {
    border-color: #0077CC;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 20px;
    cursor: pointer;
}

.contact-list li > div {
    flex-grow: 1;
}

.contact-list strong {
    font-size: 16px;
    font-weight: 500;
}

.contact-list .copy-feedback {
    font-size: 11px;
    color: #198754;
    font-weight: 500;
    text-align: right;
}

.contact-list i {
    font-size: 20px;
    color: #0077CC;
}

.contact-list span, .contact-list a {
    font-size: 15px;
    color: #6C757D;
    text-decoration: none;
}

.footer {
    background: #FFFFFF;
    color: #6C757D;
    padding: 30px 0;
    border-top: 1px solid #DEE2E6;
}

.footer-content {
    width: 90%;
    max-width: 1150px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left p {
    margin: 2px 0;
    font-size: 13px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: #6C757D;
    font-size: 17px;
    transition: all 0.2s;
}

.social-links a:hover {
    color: #0077CC;
    transform: scale(1.1);
}

#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: #0077CC;
    color: #FFFFFF;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-in-out;
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

#back-to-top:hover {
    background-color: #005FA3;
}

@media (max-width: 992px) {
    .card-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 10px;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .info-card.active {
        min-height: auto;
    }

    .footer-content {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}