:root {
    --primary-dark: #0a192f;
    --primary-blue: #003366;
    --accent-blue: #004a99;
    --secondary-blue: #0056b3;
    --white: #ffffff;
    --light-grey: #f5f5f5;
    --medium-grey: #e0e0e0;
    --dark-grey: #333333;
    --text-color: #555555;
    --transition: all 0.3s ease;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--dark-grey);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.nav-container {
    display: flex;
    align-items: stretch;
    height: 90px;
}

.logo-wrapper {
    flex: 0 0 350px;
    position: relative;
    background: var(--primary-blue);
    overflow: hidden;
}

.logo-parallelogram {
    background: var(--white);
    height: 100%;
    transform: skew(-25deg);
    margin-left: -50px;
    padding-left: 80px;
    padding-right: 50px;
    display: flex;
    align-items: center;
}

.logo {
    transform: skew(25deg);
    display: flex;
    align-items: center;
}

.nav-menu {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 40px;
    background: linear-gradient(90deg, var(--medium-grey) 0%, var(--white) 100%);
}

.nav-links {
    display: flex;
    gap: 25px;
    margin-right: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-grey);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-blue);
}

.btn-quote {
    background: var(--primary-blue);
    color: var(--white) !important;
    text-decoration: none;
    padding: 12px 25px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 14px;
    transition: var(--transition);
}

.btn-quote:hover {
    background: var(--accent-blue);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    height: 600px;
    margin-top: 90px;
    background-image: url('assets/hero.png');
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    padding-left: 10%;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(90deg, rgba(10, 25, 47, 0.8) 0%, rgba(10, 25, 47, 0.2) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    max-width: 800px;
}

.hero h1 {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.btn-presentation {
    background: var(--white);
    color: var(--primary-blue);
    border: none;
    padding: 15px 30px;
    font-weight: 800;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.btn-presentation:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
    padding: 15px 30px;
    font-weight: 800;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-blue);
}

/* Products Showcase */
.products {
    padding: 80px 0;
    background: var(--white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-10px);
}

.card-image {
    height: 280px;
    background-size: cover;
    background-position: center;
}

.card-content {
    padding: 30px;
}

.card-content h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--primary-blue);
}

.card-content p {
    font-size: 14px;
    color: var(--text-color);
    margin-bottom: 25px;
}

.btn-learn {
    background: var(--primary-blue);
    color: var(--white);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 2px;
    font-weight: 700;
    font-size: 12px;
    display: inline-block;
}

/* Details Section */
.details {
    padding: 80px 0;
    background: var(--light-grey);
    border-top: 1px solid var(--medium-grey);
}

.details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 50px;
}

.details-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
}

.icon-circle {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 18px;
}

.details-col h2 {
    font-size: 24px;
}

.list-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.check-list {
    list-style: none;
}

.check-list li {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.check-list li i {
    color: var(--primary-blue);
}

.details-col p {
    font-size: 15px;
    color: var(--text-color);
    margin-bottom: 30px;
}

.btn-dark-learn {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 12px 25px;
    border-radius: 2px;
    font-weight: 700;
    cursor: pointer;
}

/* Partner Scroll */
.partners {
    padding: 40px 0;
    background: var(--white);
    border-top: 1px solid var(--medium-grey);
}

.partner-scroll {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
}

.partner-img {
    height: 45px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    filter: grayscale(100%) opacity(0.6);
    transition: all 0.4s ease;
}

.partner-img:hover {
    filter: grayscale(0%) opacity(1);
    transform: scale(1.1);
}

.presentation-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
}

.pres-logo-img {
    height: 60px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    background: rgba(255,255,255,0.9);
    padding: 10px;
    border-radius: 6px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* Footer */
footer {
    background: var(--dark-grey);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.logo-footer {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 20px;
}

.logo-k-footer {
    border: 1px solid var(--white);
    padding: 0 3px;
    margin-right: -2px;
}

.footer-info p {
    font-size: 14px;
    opacity: 0.7;
}

.footer-nav h4 {
    margin-bottom: 25px;
    font-size: 18px;
}

.footer-nav a {
    display: block;
    color: var(--white);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    opacity: 0.7;
}

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

.footer-social a {
    width: 35px;
    height: 35px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--white);
    text-decoration: none;
}

.footer-copyright {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 12px;
    opacity: 0.5;
}

/* Presentation Overlay */
#presentation-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle, #1a2a6c, #b21f1f, #fdbb2d);
    background: var(--primary-dark);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    color: var(--white);
    visibility: hidden;
    opacity: 0;
    transition: var(--transition);
}

#presentation-overlay.visible {
    visibility: visible;
    opacity: 1;
}

.hidden { display: none !important; }

.presentation-header {
    padding: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slide-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 100px;
}

.slide h2 { font-size: 48px; color: var(--white); margin-bottom: 20px; }
.slide p { font-size: 24px; opacity: 0.8; }

.presentation-controls {
    padding: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0,0,0,0.3);
}

.btn-nav {
    background: transparent;
    border: 1px solid var(--white);
    color: var(--white);
    padding: 10px 25px;
    cursor: pointer;
    font-weight: 700;
}

.audio-caption {
    padding: 20px;
    background: rgba(255,255,255,0.05);
    text-align: center;
}

/* Animations */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

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

@media (max-width: 992px) {
    .nav-container { height: auto; flex-direction: column; }
    .logo-wrapper { flex: 0 0 100%; }
    .hero h1 { font-size: 32px; }
    .product-grid, .details-grid, .footer-grid { grid-template-columns: 1fr; }
}