* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: #f8fafc;
    color: #0f172a;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

.topbar {
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #e5e7eb;
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #1d4ed8;
}

nav {
    display: flex;
    align-items: center;
    gap: 22px;
}

nav a {
    text-decoration: none;
    color: #334155;
    font-weight: 600;
    transition: 0.2s;
}

nav a:hover {
    color: #2563eb;
}

.admin-btn {
    background: #2563eb;
    color: white !important;
    padding: 11px 18px;
    border-radius: 999px;
    box-shadow: 0 8px 20px rgba(37,99,235,0.25);
}

.hero {
    padding: 120px 0 100px;
    background:
        radial-gradient(circle at top left, rgba(59,130,246,0.25), transparent 35%),
        linear-gradient(135deg, #0f172a, #1d4ed8);
    color: white;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 50px;
}

.hero h1 {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 22px;
}

.hero p {
    font-size: 18px;
    color: #dbeafe;
    line-height: 1.7;
    margin-bottom: 32px;
}

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

.hero-btn {
    background: white;
    color: #1d4ed8;
    padding: 14px 26px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: bold;
}

.hero-btn.secondary {
    background: transparent;
    color: white;
    border: 1px solid rgba(255,255,255,0.45);
}

.hero-card {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(18px);
    border-radius: 26px;
    padding: 28px;
    box-shadow: 0 25px 60px rgba(0,0,0,0.25);
}

.hero-card h3 {
    margin-bottom: 20px;
}

.hero-stat {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.hero-stat:last-child {
    border-bottom: none;
}

.features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 45px;
}

.section-title h2 {
    font-size: 36px;
    margin-bottom: 12px;
}

.section-title p {
    color: #64748b;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-box {
    background: white;
    padding: 32px;
    border-radius: 24px;
    box-shadow: 0 12px 35px rgba(15,23,42,0.08);
    transition: 0.25s;
}

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

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: #dbeafe;
    color: #1d4ed8;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 18px;
}

.feature-box h3 {
    margin-bottom: 12px;
    font-size: 21px;
}

.feature-box p {
    color: #64748b;
    line-height: 1.6;
}

.cta {
    padding: 70px 0;
}

.cta-box {
    background: linear-gradient(135deg, #2563eb, #0f172a);
    color: white;
    padding: 55px;
    border-radius: 30px;
    text-align: center;
}

.cta-box h2 {
    font-size: 34px;
    margin-bottom: 14px;
}

.cta-box p {
    color: #dbeafe;
    margin-bottom: 25px;
}

.footer {
    padding: 28px;
    text-align: center;
    background: #0f172a;
    color: #cbd5e1;
}

@media (max-width: 900px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

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

    nav {
        display: none;
    }

    .hero h1 {
        font-size: 38px;
    }
}



/* Mobil Uyum */

@media (max-width: 768px) {

    .topbar .container {
        flex-direction: column;
        gap: 15px;
    }

    nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    nav a {
        font-size: 14px;
    }

    .hero {
        padding: 70px 0;
    }

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

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

    .hero p {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-btn {
        width: 100%;
        display: block;
        text-align: center;
    }

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

    .cta-box {
        padding: 30px 20px;
    }

    .cta-box h2 {
        font-size: 26px;
    }
}