/***************define default design against overwrite***************/
html {
    background-color: var(--background-color);
    color: var(--text-primary);
    min-height: 100%;
}

body {
    background-color: var(--background-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    padding-top: 100px;
    font-family: 'Roboto', sans-serif;
    min-height: 100vh;
}

.container, .card {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

p {
    color: var(--text-primary);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
}

a {
    color: var(--text-primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-color);
}

button {
    background-color: var(--primary-color);
    color: var(--surface-color);
    border: none;
    padding: 10px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    transition: all 0.4s ease 0.1s;
    background-color: var(--secondary-color);
}

.success {
    background-color: var(--success-color);
    color: #ffffff;
    padding: 8px;
    border-radius: 4px;
}

.error {
    background-color: var(--error-color);
    color: #ffffff;
    padding: 8px;
    border-radius: 4px;
}

.warning {
    background-color: var(--warning-color);
    color: #212529;
    padding: 8px;
    border-radius: 4px;
}

input, textarea, select {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--secondary-color);
    padding: 8px;
    border-radius: 4px;
}

input::placeholder {
    color: var(--text-secondary);
}

/***************design section***************/

/*------HEADER------*/

.main-header .nav-logo {
    width: 150px;
    height: 28px;
    cursor: pointer;
    margin-right: auto;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.1), 0 6px 20px 0 rgba(0, 0, 0, 0.1);
    background-color: var(--background-color);
    z-index: 1000;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 20px;
}

.header-credit-img {
    width: 19px;
    height: 19px;
    vertical-align: middle;
}

.nav-list {
    list-style: none;
}

.nav-list li {
    color: var(--text-primary);
    display: inline-block;
    padding: 0 20px;
}

.nav-list li a {
    transition: all 0.3s ease 0s;
}

.nav-day {
    display: none; /*inline block other state */
    width: 28px;
    height: 28px;
    vertical-align: middle;
}

/*------MAIN-SECTION------*/

.overview {
    padding: 20px;
    margin: 0 15%;
}

.category {
    margin-bottom: 20px;
}

#shop-toast {
    text-align: center;
    opacity: 0.6;
    margin-bottom: 30px;
}

.category h2 {
    margin-bottom: 10px;
    font-size: 28px;
    font-weight: 500;
    background: linear-gradient(to right, var(--primary-color), var(--contrast-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.grid-card {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 1fr;
    gap: 16px;
    justify-items: center;
    margin-bottom: 80px;
}

.shop-box-card {
    background-color: var(--surface-color);
    padding: 16px;
    border-radius: 8px;
    border: 2px solid transparent;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
    font-size: 22px;
    transition: all 0.3s ease 0s;
    min-width: 80%;
    max-width: 80%;
}

.shop-box-card:hover {
    transition: all 0.4s ease 0.1s;
    background-color: var(--primary-color);
}

.shop-box-card h3 {
    color: var(--text-primary);
    margin: 10px;
    font-size: 22px;
}

.shop-box-card img {
    height: 150px;
    width: 150px;
}

.img-credit-shop {
    max-height: 26px;
    max-width: 26px;
    vertical-align: middle;
}

.shop-box-card:hover h3,
.shop-box-card:hover p {
    transition: all 0.4s ease 0.1s;
    color: var(--surface-color);
}

.shop-box-card p {
    margin: 0 10%;
    font-size: 22px;
    color: var(--text-secondary);
}

#dark-color-gradient img {display: none;}
#cyber-color-gradient img {display: none;}
#autumn-color-gradient img {display: none;}

.theme-preview {
    width: 100%;
    height: 150px;
    border-radius: 8px;
    background: linear-gradient(135deg,
    var(--theme-color-1),
    var(--theme-color-2),
    var(--theme-color-3),
    var(--theme-color-4));
}

.purchased {
    background: none;
}