body {
    --accent: #163e77;
    font-family: Arial, sans-serif;
    background: #f0f5fa;
    margin: 0;
    padding: 0;
}

.container {
    width: 90%;
    max-width: 1000px;
    margin: 40px auto;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 32px;
    color: #333;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.box {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #dce3eb;
}

.box h3 {
    margin: 0 0 15px 0;
    font-size: 20px;
}

.row {
    border-top: 1px solid #e1e7ee;
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.row:first-child {
    border-top: none;
}

.label {
    font-size: 14px;
    color: #666;
    min-width: 60px;
}

.value {
    font-size: 16px;
    color: #000;
    flex: 1;
}

.value input {
    width: 100%;
    padding: 8px;
    border: 1px solid #dce3eb;
    border-radius: 5px;
}

.edit {
    color: #0d6efd;
    cursor: pointer;
    font-size: 14px;
}

.edit.save {
    color: #28a745;
}

#payment-form label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    color: #666;
}

#payment-form input,
.feedback-form input,
.feedback-form select,
.feedback-form textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 5px;
    border: 1px solid #dce3eb;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
    background: #fff;
}

.feedback-form label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    color: #666;
}

.feedback-form textarea {
    resize: vertical;
    min-height: 130px;
}

.expiry-cvv {
    display: flex;
    gap: 10px;
}

.expiry-cvv > div {
    flex: 1;
}

.total-box {
    margin-top: 20px;
    padding: 25px;
    background: #fff;
    border-radius: 10px;
    border: 1px solid #dce3eb;
    text-align: center;
}

.total-box h3 {
    margin: 0;
    font-size: 20px;
    color: #333;
}

.total-price {
    margin-top: 10px;
    font-size: 35px;
    font-weight: bold;
    color: #0d6efd;
}

.pay-btn {
    background: linear-gradient(135deg, #004bcc, #002f88);
    color: white;
    padding: 14px;
    width: 100%;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    margin-top: 25px;
    font-size: 17px;
    font-weight: 600;
    transition: 0.25s ease;
    box-shadow: 0 3px 10px rgba(0, 60, 180, 0.25);
}

.pay-btn:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 6px 16px rgba(0, 60, 180, 0.35);
}

.error {
    display: block;
    color: red;
    font-size: 12px;
    margin-top: -10px;
    margin-bottom: 10px;
}

.main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    background: white;
    border-bottom: 1px solid rgba(0,0,0,0.07);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-section img {
    width: 55px;
    height: 55px;
    border: 2px solid #333;
    border-radius: 50%;
    object-fit: cover;
}

.site-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
}

.nav-center {
    position:fixed;
    left: 45%;
    display: flex;
    gap: 24px;
}

.nav-center a {
    font-size: 17px;
    font-weight: 600;
    color: #555;
    text-decoration: none;
}

.nav-center a:hover {
    color: var(--accent);
}

.profile-icon img {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid #333;
    object-fit: cover;
    cursor: pointer;
}

@media (max-width: 900px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .nav-center {
        position: static;
        left: auto;
        flex-wrap: wrap;
        justify-content: center;
    }

    .main-header {
        flex-wrap: wrap;
        gap: 16px;
    }
}