:root {
    --primary: #00b4d8;
    --primary-dark: #0096c7;
    --primary-light: #90e0ef;
    --secondary: #023e8a;
    --dark: #1a1a2e;
    --light: #f8f9fa;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-400: #94a3b8;
    --gray-600: #475569;
    --gradient-primary: linear-gradient(135deg, #00b4d8 0%, #0096c7 100%);
    --gradient-hero: linear-gradient(135deg, rgba(0, 180, 216, 0.1) 0%, rgba(2, 62, 138, 0.05) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

/* ============ HEADER ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 5px 0;
    transition: all 0.3s ease;
    background: #ffffff;
    box-shadow: 0px 4px 4px 0px #00000040;
}

.header.scrolled {
    padding: 0.75rem 0;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 70px;
    width: auto;
    object-fit: contain;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #18191F;
    font-weight: 400;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 400;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 180, 216, 0.3);
    width: 180px;
    height: 48px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 180, 216, 0.4);
}

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
}

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

.lang-selector {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: #2D3135;
    cursor: pointer;
    font-size: 0.9rem;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s ease;
}

/* ============ CONTAINER ============ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ============ HERO SECTION ============ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-image: url('images/hero_image.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: #009FE14F;
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    width: 100%;
}

.hero-title {
    font-family: 'Inter', sans-serif;
    font-size: 72px;
    font-weight: 700;
    font-style: normal;
    line-height: 1.15;
    color: var(--white);
    margin-bottom: 2rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.btn-dark {
    background: #060606;
    color: var(--white);
    padding: 13px 32px;
    font-size: 1rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn-dark:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* ============ ABOUT SECTION ============ */
.about {
    padding: 80px 0;
}

.about .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h2 {
    font-size: 38px;
    color: var(--primary);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.about-content p {
    color: var(--gray-600);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.about-content p:last-child {
    margin-bottom: 0;
}

.about-image {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-img {
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    border: 4px solid var(--primary);
}

/* ============ FEATURES SECTION ============ */
.features {
    padding: 6rem 0;
    background: #009FE11A;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: 38px;
    color: var(--primary);
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--gray-600);
    font-size: 1.05rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem 1.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(0, 180, 216, 0.2) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.feature-icon i {
    font-size: 1.75rem;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ============ SPECIALTIES SECTION ============ */
.specialties {
    padding: 6rem 0 0;
    background: var(--white);
}

.specialties-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.specialty-card {
    display: flex;
    flex-direction: column;
    background: #009FE11A;
    border-radius: var(--radius-md);
    padding: 1rem;
}

.specialty-image {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
}

.specialty-content {
    padding: 0.5rem 0;
}

.specialty-content h3 {
    font-size: 1.25rem;
    color: #2FB0E5;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.specialty-content p {
    font-size: 0.9rem;
    color: #131927;
    line-height: 1.6;
}

/* ============ PARTNERS SECTION ============ */
.partners {
    padding: 73px 0 38px;
    background: var(--white);
}

.partners h2 {
    text-align: center;
    font-size: 38px;
    color: var(--primary);
    margin-bottom: 0;
}

.partners-logos {
    padding: 43px 0 52px;
    background: #E6F5FC;
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.partner-logo {
    height: 60px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.partner-logo:hover {
    transform: scale(1.05);
}

.partner-logo-invert {
    filter: brightness(0.3) saturate(100%);
}

/* ============ FOOTER CONTACT ============ */
.footer-contact {
    background: #2FB0E5;
    color: var(--white);
    padding: 3rem 0;
}

.footer-contact-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.footer-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-info p {
    font-size: 16px;
    font-weight: 400;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-info a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer-info a:hover {
    opacity: 0.8;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: var(--white);
    color: #2FB0E5;
}

/* ============ FOOTER COPYRIGHT ============ */
.footer-copyright {
    background: #000000;
    color: var(--white);
    padding: 1.25rem 0;
    text-align: center;
}

.footer-copyright p {
    font-size: 14px;
    font-weight: 400;
    margin: 0;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .features-grid,
    .specialties-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title {
        font-size: 56px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
    }

    .nav.active {
        right: 0;
    }

    .mobile-toggle {
        display: flex;
    }

    .about .container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero {
        min-height: 100vh;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-content {
        text-align: left;
    }

    .about-content {
        text-align: center;
    }

    .features-grid,
    .specialties-grid {
        grid-template-columns: 1fr;
    }

    .partners-grid {
        gap: 2rem;
    }

    .footer-contact-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    .footer-info p {
        justify-content: center;
    }

    .footer-social {
        justify-content: center;
    }
}

/* ============ ANIMATIONS ============ */
.animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate.fade-right {
    transform: translateX(-30px);
}

.animate.fade-left {
    transform: translateX(30px);
}

.animate.visible {
    opacity: 1;
    transform: translate(0, 0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--white);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 50px;
    height: 50px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============ VIDEO MODAL ============ */
.video-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.video-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    cursor: pointer;
}

.video-modal-content {
    position: relative;
    z-index: 1;
    width: 90%;
    max-width: 900px;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.video-modal.active .video-modal-content {
    transform: scale(1);
}

.video-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.video-modal-close:hover {
    color: var(--primary);
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}