header {
    width: 100%;
    position: fixed;
    padding-top: var(--top--);
    top: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    box-sizing: content-box;
    transition: all .6s;
}

header.on {
    padding: 20px 0;
    background-color: #fff;
    box-shadow: 0 0 10px rgb(0 0 0 / 15%);
}

header.on.show {
    position: sticky;
    top: 0;
}

header>.center img {
    width: 200px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    transition: filter .6s ease;
}

header.on>.center img {
    filter: none;
}

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

header .nav-back-btn {
    display: none;
}

header.show .nav-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px 8px 14px;
    border-radius: 50px;
    background: transparent;
    border: 1.5px solid #e2e8f0;
    font-size: var(--18px--);
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    letter-spacing: 0.2px;
    position: relative;
    overflow: hidden;
}

header .nav-back-btn:hover {
    background: #f8fafb;
    border-color: #c4d0dc;
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.nav-back-btn .arrow-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

footer {
    width: 100%;
}

footer .message {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 35px;
}


form input[type="text"],
form input[type="email"],
form textarea,
form h-select,
form select {
    border: 1px solid #000;
    border-radius: 10px;
    padding: 20px 30px;
    font-size: var(--24px--);
}

form div.required:has(>textarea) {
    position: relative;
}

form div.required:has(>textarea) span {
    font-size: var(--18px--);
    color: #666;
    position: absolute;
    right: 30px;
    bottom: 20px;
}

.privacy {

    align-items: center;
    justify-content: center;
    gap: 14px;
}

.privacy input {
    width: auto;
    height: 18px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
}

.verifyBox {
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.verifyBox input {
    flex: 1;
    width: auto;
}

.verifyBox svg,
.verifyBox img,
footer .message .Btn button,
.privacy label {
    cursor: pointer;
    user-select: none;
}

.privacy label {
    font-size: var(--18px--);
    line-height: 150%;
}

footer .message .Btn {
    justify-content: center;
}

footer .message .Btn button {
    padding: clamp(15px, 1.5625vw, 30px) clamp(25px, 2.604166666667vw, 50px);
    background-color: #295375;
    border-radius: 10px;
    color: #fff;
    font-size: var(--24px--);
}

.privacy .invalid {
    left: 35%;
}

@media (max-width: 600px) {
    header {
        padding-top: 30px;
    }

    header>.center img {
        width: 100px !important;
    }


    header.show .nav-back-btn,
    form div.required:has(>textarea) span,
    .privacy label {
        font-size: 10px;
    }
}