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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f7fb;
    color: #172033;
}

.container {
    width: min(1120px, 92%);
    margin: auto;
}

/* ================= HEADER ================= */

.header {
    background: #08111f;
    padding: 22px 0;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 3px 15px rgba(0,0,0,.15);
}

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

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    color: white;
    text-decoration: none;
    font-size: 36px;
    font-weight: 800;
}

.brand img {
    width: 272px;
    height: 72px;
    object-fit: contain;
}

.brand span {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: .5px;
}

/* ================= MENU ================= */

nav {
    display: flex;
    gap: 26px;
}

nav a {
    color: #dbe6ff;
    text-decoration: none;
    font-size: 16px;
    transition: .3s;
}

nav a:hover {
    color: #ff8a00;
}

/* ================= HERO ================= */

.hero {
    background: linear-gradient(135deg,#08111f,#12345a);
    color: white;
    padding: 90px 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero h1 {
    font-size: 48px;
    line-height: 1.15;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    color: #d9e5f8;
    line-height: 1.7;
}

.hero-buttons {
    margin-top: 30px;
    display: flex;
    gap: 14px;
}

.btn {
    padding: 13px 22px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    transition: .3s;
}

.primary {
    background: #ff8a00;
    color: white;
}

.primary:hover {
    transform: translateY(-2px);
}

.secondary {
    border: 1px solid #7ea6d9;
    color: white;
}

.secondary:hover {
    background: rgba(255,255,255,.08);
}

/* ================= HERO CARD ================= */

.hero-card {
    background: rgba(255,255,255,.10);
    border: 1px solid rgba(255,255,255,.20);
    border-radius: 24px;
    padding: 34px;
    backdrop-filter: blur(8px);
}

.hero-card h3 {
    font-size: 26px;
    margin-bottom: 14px;
}

/* ================= SECTIONS ================= */

.section {
    padding: 70px 0;
}

.section h2 {
    font-size: 34px;
    margin-bottom: 12px;
}

.section-desc {
    color: #5f6f89;
    margin-bottom: 30px;
}

/* ================= CARDS ================= */

.cards {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 22px;
}

.card {
    background: white;
    padding: 28px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(10,30,60,.08);
    transition: .3s;
}

.card:hover {
    transform: translateY(-6px);
}

.card h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.card p {
    color: #5f6f89;
    line-height: 1.6;
    margin-bottom: 18px;
}

.card a {
    color: #ff8a00;
    font-weight: 700;
    text-decoration: none;
}

/* ================= DARK SECTION ================= */

.dark {
    background: #08111f;
    color: white;
}

.dark p {
    color: #d9e5f8;
    line-height: 1.7;
    max-width: 780px;
}

/* ================= CONTACT ================= */

.contact-box {
    margin-top: 24px;
    background: white;
    padding: 26px;
    border-radius: 18px;
    box-shadow: 0 15px 35px rgba(10,30,60,.08);
}

.contact-box p {
    margin-bottom: 10px;
}

/* ================= FOOTER ================= */

footer {
    background: #08111f;
    color: #aab8d0;
    text-align: center;
    padding: 22px;
}

/* ================= MOBİL ================= */

@media (max-width:800px){

    .nav{
        flex-direction:column;
        gap:18px;
    }

    nav{
        flex-wrap:wrap;
        justify-content:center;
    }

    .brand img{
        width:58px;
        height:58px;
    }

    .brand span{
        font-size:30px;
    }

    .hero-content{
        grid-template-columns:1fr;
    }

    .hero h1{
        font-size:34px;
    }

    .cards{
        grid-template-columns:1fr;
    }
}