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

html,
body {
    scroll-behavior: smooth
}

body {
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
    background: #fff
}

.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    height: 80px;
    background: #0B5ED7;
    padding: 0 2rem;
    gap: 1rem
}

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

.nav-logo img {
    height: 70px;
    width: 70px;
    object-fit: contain;
    display: block
}

.nav-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none
}

.nav-links a {
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    color: #fff;
    transition: opacity 0.2s;
    white-space: nowrap
}

.nav-links a:hover,
.nav-links a.active {
    opacity: 0.75
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s
}

.hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg)
}

.hamburger.open span:nth-child(2) {
    opacity: 0
}

.hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg)
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background: #0B5ED7;
    z-index: 999;
    flex-direction: column;
    padding: 1rem 0
}

.mobile-menu.open {
    display: flex
}

.mobile-menu a {
    color: #fff;
    text-decoration: none;
    padding: 0.85rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1)
}

#scroll-progress {
    position: fixed;
    top: 80px;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(to right, #00d4ff, #0B5ED7);
    z-index: 2000
}

#backToTop {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 500;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #0B5ED7;
    color: #fff;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(11, 94, 215, 0.4);
    transition: all 0.3s
}

#backToTop:hover {
    background: #0047cc;
    transform: translateY(-3px)
}

#backToTop.show {
    display: flex
}

.page-wrap {
    padding-top: 80px;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 42% 58%;
    position: relative
}

.page-wrap::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200px;
    height: 80px;
    background: #0B5ED7;
    z-index: 1;
    pointer-events: none
}

.page-wrap::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 60px;
    height: 60px;
    background: #0B5ED7;
    z-index: 1;
    pointer-events: none
}

.about-img-wrap {
    position: relative;
    z-index: 2;
    overflow: hidden;
    min-height: calc(100vh - 80px)
}

.about-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block
}

.about-text {
    padding: 3rem 3.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 2
}

.about-text h1 {
    font-size: clamp(1.5rem, 2.5vw, 2.2rem);
    font-weight: 800;
    color: #0B5ED7;
    margin-bottom: 1rem;
    line-height: 1.2
}

.about-text h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #0B5ED7;
    margin-bottom: 0.7rem
}

.about-text p {
    font-size: 0.87rem;
    color: #333;
    line-height: 1.85;
    text-align: justify;
    margin-bottom: 1.2rem
}

.btn-learn {
    background: #0B5ED7;
    color: #fff;
    padding: 0.65rem 1.6rem;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
    align-self: flex-start;
    margin-top: 0.5rem
}

.btn-learn:hover {
    background: #0047cc
}

footer {
    background: #050e1f;
    color: #fff;
    padding: 3rem 3rem 1.5rem
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem
}

.footer-brand img {
    height: 70px;
    width: 70px;
    object-fit: contain;
    margin-bottom: 1rem
}

.footer-brand p {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    max-width: 260px
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
    letter-spacing: 1px;
    text-transform: uppercase
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.83rem;
    transition: color 0.2s
}

.footer-col ul li a:hover {
    color: #4fa3ff
}

.footer-social {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem
}

.social-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.2s;
    color: #fff
}

.social-btn:hover {
    background: #0B5ED7;
    border-color: #0B5ED7;
    transform: translateY(-2px)
}

.footer-divider {
    border: none;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 1.2rem
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem
}

.footer-bottom p {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.35)
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
    font-size: 0.78rem
}

.footer-bottom-links a:hover {
    color: #4fa3ff
}

@media(max-width:900px) {
    .nav-links {
        display: none
    }

    .hamburger {
        display: flex
    }

    .page-wrap {
        grid-template-columns: 1fr
    }

    .page-wrap::before {
        width: 150px
    }

    .about-img-wrap {
        min-height: 300px;
        max-height: 380px
    }

    .about-text {
        padding: 2rem
    }

    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 2rem
    }
}

@media(max-width:600px) {
    .site-nav {
        padding: 0 1rem;
        height: 65px
    }

    .nav-logo img {
        height: 55px;
        width: 55px
    }

    .mobile-menu {
        top: 65px
    }

    #scroll-progress {
        top: 65px
    }

    .page-wrap {
        padding-top: 65px
    }

    .about-text {
        padding: 1.5rem
    }

    .footer-top {
        grid-template-columns: 1fr
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center
    }

    footer {
        padding: 2rem 1.5rem 1rem
    }
}