a {
    text-decoration: none;
}

* {
  box-sizing: border-box;
}

html, body {
    min-height: 100%;
    height: 100%;
    background: linear-gradient(45deg, #292929, #303030);
}

body {
    display: flex;
    flex-direction: column;
    margin: 0;
    font-family: "Roboto", sans-serif;
}

.header {
    position: fixed;
    top: 0;
    z-index: 100;

    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 70px;
    background: linear-gradient(45deg, #181818, #202020, #252525);
    padding-left: 2%;
    padding-right: 2%;
    border-bottom: 1px solid rgba(0, 89, 255, 0.29);
    box-shadow: 0px 0px 5vh #1f52b8;
}

#LogoName {
    background: linear-gradient(90deg, #2269c5, #4a7ede);
    color: #ffffff;
    font-size: clamp(12px, 2.5vw, 32px);
    margin: 0;
    padding: 0.4vw;
    border-radius: 15px;
    font-weight: bold;
}

.button {
    display: flex;
    gap: clamp(8px, 1.5vw, 24px);

    background: linear-gradient(90deg, #2269c5, #4a7ede);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.btn {
    color: #2269c5;
    transition: 0.3s;
    font-size: clamp(12px, 1.2vw, 16px);
    white-space: nowrap;
}

.btn:hover {
    color: #8aa3da;
    -webkit-text-fill-color: initial;
    text-decoration: none;
}

.content {
    position: relative;
    padding-top: 120px;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    overflow-x: hidden;
    padding-bottom: 5vh;
}

.content > *:not(.effect) {
    position: relative;
    z-index: 1;
}

/* ── Мобильные (до 640px) ── */
@media (max-width: 640px) {
    .header {
        height: 56px;
        padding-left: 4%;
        padding-right: 4%;
    }

    #LogoName {
        font-size: clamp(16px, 5vw, 22px);
    }

    .button {
        gap: clamp(6px, 3vw, 14px);
    }

    .btn {
        font-size: clamp(11px, 3vw, 14px);
    }

    .content {
        padding-top: 90px;
    }
}

/* ── Очень маленькие (до 360px) ── */
@media (max-width: 360px) {
    #LogoName {
        font-size: 15px;
    }

    .btn {
        font-size: 11px;
    }
}