@media only screen and (min-width: 1025px) {
    body{
         background:
            radial-gradient(900px 500px at 10% 10%, rgba(0, 170, 255, .15), transparent 60%),
            radial-gradient(700px 400px at 90% 0%, rgba(255, 75, 110, .12), transparent 60%),
            var(--bg);
    }
    header {
        min-height: 10vh;
        
    }

    :root {
        --bg: #0b0e13;
        --text: #e9eef6;
        --muted: #b8c2d0;
        --brand: #00aaff;
        --red: #ff4b6e;
        --glass: rgba(255, 255, 255, .06);
        --glass-border: rgba(255, 255, 255, .14);
        --radius: 18px;
        --shadow: 0 12px 40px rgba(0, 0, 0, .45);
    }

    #about-us {
       
        color: var(--text);
        padding: 96px 24px;
        font-family: 'Trebuchet MS', Arial, sans-serif;
    }

    #about-us .container {
        max-width: 1150px;
        margin: 0 auto;
    }

    .section-title {
        text-align: center;
        font-size: clamp(36px, 7vw, 68px);
        font-weight: 900;
        letter-spacing: .04em;
        margin: 0 0 36px;
        background: linear-gradient(90deg, var(--brand), #7fd1ff);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        text-shadow: 0 0 22px rgba(0, 170, 255, .25);
    }

    /* grid */
    .grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .grid .center {
        grid-column: 1 / -1;
    }

    /* card (glass) */
    .card {
        position: relative;
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        background: var(--glass);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius);
        padding: 28px 28px;
        box-shadow: var(--shadow);
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }

    .card:hover {
        transform: translateY(-4px);
        box-shadow: 0 18px 56px rgba(0, 0, 0, .55);
        border-color: rgba(0, 170, 255, .25);
    }

    /* small top glow bars */
    .card::before {
        content: "";
        position: absolute;
        top: -1px;
        left: 14px;
        right: 14px;
        height: 3px;
        border-radius: 999px;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .35), transparent);
        opacity: .6;
    }

    /* accents */
    .accent-red {
        box-shadow: 0 8px 36px rgba(255, 75, 110, .25), var(--shadow);
    }

    .accent-cyan {
        box-shadow: 0 8px 36px rgba(0, 170, 255, .25), var(--shadow);
    }

    .accent-white {
        box-shadow: 0 8px 36px rgba(255, 255, 255, .18), var(--shadow);
    }

    /* typo */
    .card h2 {
        margin: 0 0 10px;
        font-size: 22px;
        letter-spacing: .3px;
    }

    .accent-red h2 {
        color: var(--red);
        text-shadow: 0 0 10px rgba(255, 75, 110, .35);
    }

    .accent-cyan h2 {
        color: var(--brand);
        text-shadow: 0 0 10px rgba(0, 170, 255, .35);
    }

    .card p {
        margin: 0 0 12px;
        line-height: 1.75;
        color: var(--muted);
        font-size: 16px;
    }

    .card strong {
        color: #fff;
        font-weight: 800;
    }

    .card em {
        color: var(--brand);
        font-style: normal;
        font-weight: 700;
    }

    /* slogan */
    .slogan {
        margin: 6px 0 10px;
        font-size: 14px;
        font-weight: 900;
        letter-spacing: 1.6px;
        text-transform: uppercase;
        text-align: center;
        color: #ffd7e1;
    }

    /* responsive */
    @media (max-width: 980px) {
        .grid {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 520px) {
        .card {
            padding: 22px 20px;
        }

        .card p {
            font-size: 15px;
        }
    }

}

/* Mobil cihazlar için About Us sayfası stilleri */
@media only screen and (max-width: 768px) {
    :root {
        --bg: #0b0e13;
        --text: #e9eef6;
        --muted: #b8c2d0;
        --brand: #00aaff;
        --red: #ff4b6e;
        --glass: rgba(255, 255, 255, .06);
        --glass-border: rgba(255, 255, 255, .14);
        --radius: 18px;
        --shadow: 0 12px 40px rgba(0, 0, 0, .45);
    }

    body {
        background:
            radial-gradient(600px 300px at 10% 10%, rgba(0, 170, 255, .15), transparent 60%),
            radial-gradient(500px 250px at 90% 0%, rgba(255, 75, 110, .12), transparent 60%),
            var(--bg);
    }

    #about-us {
        color: var(--text);
        padding: 40px 16px;
        font-family: 'Trebuchet MS', Arial, sans-serif;
        min-height: 100vh;
    }

    #about-us .container {
        max-width: 100%;
        margin: 0 auto;
        padding: 0 10px;
    }

    .section-title {
        text-align: center;
        font-size: clamp(24px, 8vw, 36px);
        font-weight: 900;
        letter-spacing: .04em;
        margin: 0 0 24px;
        background: linear-gradient(90deg, var(--brand), #7fd1ff);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        text-shadow: 0 0 22px rgba(0, 170, 255, .25);
        line-height: 1.2;
    }

    /* Mobil grid - tek sütun */
    .grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .grid .center {
        grid-column: 1;
    }

    /* Mobil card stilleri */
    .card {
        position: relative;
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        background: var(--glass);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius);
        padding: 20px 16px;
        box-shadow: var(--shadow);
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        margin-bottom: 16px;
    }

    .card:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 32px rgba(0, 0, 0, .55);
        border-color: rgba(0, 170, 255, .25);
    }

    /* Mobil için küçük glow bar */
    .card::before {
        content: "";
        position: absolute;
        top: -1px;
        left: 12px;
        right: 12px;
        height: 2px;
        border-radius: 999px;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .35), transparent);
        opacity: .6;
    }

    /* Mobil accent stilleri */
    .accent-red {
        box-shadow: 0 6px 24px rgba(255, 75, 110, .25), var(--shadow);
    }

    .accent-cyan {
        box-shadow: 0 6px 24px rgba(0, 170, 255, .25), var(--shadow);
    }

    .accent-white {
        box-shadow: 0 6px 24px rgba(255, 255, 255, .18), var(--shadow);
    }

    /* Mobil tipografi */
    .card h2 {
        margin: 0 0 8px;
        font-size: 18px;
        letter-spacing: .3px;
        line-height: 1.3;
    }

    .accent-red h2 {
        color: var(--red);
        text-shadow: 0 0 8px rgba(255, 75, 110, .35);
    }

    .accent-cyan h2 {
        color: var(--brand);
        text-shadow: 0 0 8px rgba(0, 170, 255, .35);
    }

    .card p {
        margin: 0 0 10px;
        line-height: 1.6;
        color: var(--muted);
        font-size: 14px;
    }

    .card strong {
        color: #fff;
        font-weight: 800;
    }

    .card em {
        color: var(--brand);
        font-style: normal;
        font-weight: 700;
    }

    /* Mobil slogan */
    .slogan {
        margin: 4px 0 8px;
        font-size: 12px;
        font-weight: 900;
        letter-spacing: 1.2px;
        text-transform: uppercase;
        text-align: center;
        color: #ffd7e1;
    }

    /* Çok küçük ekranlar için ek optimizasyonlar */
    @media (max-width: 480px) {
        #about-us {
            padding: 24px 12px;
        }

        .card {
            padding: 16px 12px;
        }

        .card h2 {
            font-size: 16px;
        }

        .card p {
            font-size: 13px;
            line-height: 1.5;
        }

        .slogan {
            font-size: 11px;
            letter-spacing: 1px;
        }
    }
}