:root {
    --neutral-900: hsl(227, 75%, 14%);
    --neutral-800: hsl(226, 25%, 17%);
    --neutral-700: hsl(225, 23%, 24%);
    --neutral-500: hsl(226, 21%, 32%);
    --neutral-600: hsl(226, 11%, 37%);
    --neutral-300: hsl(0, 0%, 85%);
    --neutral-400: hsl(0, 0%, 94%);
    --neutral-200: hsl(217, 61%, 90%);
    --neutral-100: hsl(0, 0%, 93%);
    --neutral-0: hsl(200, 60%, 99%);
    --red-400: hsl(3, 86%, 64%);
    --red-500: hsl(3, 71%, 56%);
    --red-700: hsl(3, 77%, 44%);
    --card-radius: 18px;
    --card-padding: 1.2rem;
    --shadow: 0 2px 8px 0 rgba(20,25,45,0.14);
    --transition: .3s;
    --font-family: 'Noto Sans', Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    background: var(--bg-gradient, linear-gradient(180deg, #EBF2FC 0%, #EEF8F9 100%));
    color: var(--neutral-900);
    margin: 0;
    min-height: 100vh;
    transition: background .5s, color .3s;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.extensions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--neutral-0);
    border-radius: 1.2rem;
    margin-bottom: 1.5rem;
    padding: 0.3rem 1rem;
    box-sizing: border-box;
    box-shadow: var(--shadow);
    gap: 1.2rem; /* Adds spacing between left and right sections */
}

.header-logo,
.header-title {
    display: flex;
    align-items: center;
}
.header-title {
    font-weight: 700;
    display: flex;
    font-size: 1.3rem;
    align-items: left;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem; /* Spacing between logo and title */
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 3rem 0 1rem 0;
}

.dark-mode .extensions-header {
    background: var(--neutral-700);
}

.logo-crop {
    width: 41px;
    height: 41px;
    overflow: hidden;
    display: flex; 
}


.header-img {
    height: 41px; 
    display: block;
}

.logo-crop img {
    width: auto;    
    height: 41px;   
    display: block;
}

.header-actions {
    display: flex;
    align-items: center;
    background: none;
    padding: 0.8rem 0.5rem;
    border-radius: 10px;
    background-color: var(--neutral-400);
}

.header-actions:hover {
    background-color: var(--neutral-300);
    transition: 0.5s;
}

#themeToggle {
    border: none;
    font-size: 2rem;
    cursor: pointer;
    display: flex;
    align-items: center;  
    color: var(--neutral-900);
    background: none;
}

#themeToggle img {
    width: 20px; 
    height: 20px;   
}


.section-title {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: 1px;
}

.filters {
    display: flex;
    gap: .9rem;
    justify-content: flex-end;
}

.filter-btn {
    background: var(--neutral-0);   
    border-radius: 20px;
    border: none;
    padding: .5rem 1.5rem;
    font-weight: 500;
    color: var(--neutral-700);
    cursor: pointer;
    font-size: 1rem;
    box-shadow: var(--shadow);
}

.filter-btn.active,
.filter-btn:focus,
.filter-btn:hover {
    background: var(--red-400);
    color: var(--neutral-0);
}

#extensionsGrid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.3rem 1.3rem;
}



.extension-card {
    display: flex;
    flex-direction: column;
    background: var(--neutral-0);
    border-radius: var(--card-radius);
    box-shadow: var(--shadow);
    padding: var(--card-padding);
    gap: .7rem;
    transition: box-shadow var(--transition), background var(--transition);
    position: relative;
    min-height: 142px;
}

.extension-card .card-header {
    display: flex;
    min-height: 100px;
    gap: 1.2rem;
    overflow: hidden;
}

.extension-card .card-logo {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    object-fit: contain;
}

.extension-card .card-desc {
    margin: .4rem 0 0 0;
    color: var(--neutral-600);
    font-size: 1.04rem;
    font-weight: 400;
    flex: 1;
}

.card-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: .7rem;
}

.toggle-switch {
    position: relative;
    width: 48px;
    display: inline-block;
    height: 24px;
}

.toggle-switch input {
    display:none;
}

.slider {
    position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
    background: var(--neutral-300);
    border-radius: 24px;
    transition: background .3s;
}

.slider:before {
    position: absolute; content: "";
    height: 20px; width: 20px; left: 2px; bottom: 2px;
    background: var(--neutral-600);
    border-radius: 50%;
    transition: transform .3s, background .3s;
}

.toggle-switch input:checked + .slider {
    background: var(--red-400);
}

.toggle-switch input:checked + .slider:before {
    background: var(--neutral-0);
    transform: translateX(24px);
}

.remove-btn {
    background: none;
    color: var(--red-400);
    border: 1.5px solid var(--red-400);
    padding: .5rem 1.4rem;
    border-radius: 50px;
    font-weight: 500;
    font-size: 1.05rem;
    cursor: pointer;
    transition: background .22s, color .22s, border .22s;
}

.remove-btn:hover,
.remove-btn:focus {
    background: var(--red-400);
    color: #fff;
}

.no-extensions { 
    text-align: center; 
    color: var(--neutral-600);
}

.attribution { 
    margin-top: 2rem; 
    color: var(--neutral-600);
    text-decoration: none;
    text-align: center;
    padding: 0.5rem;
    font-size: 0.7rem;
}

.attribution a { 
   text-decoration: none;
}

.card-title {
   font-weight: 700;
}

a { 
    color: hsl(228, 45%, 44%);
}


/********** Dark Mode ***********/

.dark-mode body {
    --bg-gradient: linear-gradient(180deg, #040918 0%, #091540 100%);
    background: var(--bg-gradient);
    color: var(--neutral-0);
}

.dark-mode .header-actions {
    background-color: var(--neutral-500);
}

.dark-mode .header-actions:hover {
    background-color: var(--neutral-800);
}

.dark-mode #themeToggle {
    color: var(--neutral-0);
}


.dark-mode .extension-card {
    background: var(--neutral-800);
    color: var(--neutral-0);
}

.dark-mode .card-desc {
   color: var(--neutral-200);
}


.dark-mode .filter-btn {
    background: var(--neutral-600); 
    color: var(--neutral-0); 
}

.dark-mode .filter-btn.active,
.dark-mode .filter-btn:focus,
.dark-mode .filter-btn:hover {
    background: var(--red-400); 
    color: var(--neutral-900); 
}

.dark-mode .remove-btn { 
    color: var(--neutral-400); 
    border-color: var(--neutral-600);
}

.dark-mode .remove-btn:hover, .dark-mode .remove-btn:focus { 
    background: var(--red-400); 
    color: #fff;
}


@media (max-width: 1000px) {
    #extensionsGrid { 
       grid-template-columns: 1fr 1fr; 
    }
}

@media (max-width: 650px) {
    #extensionsGrid { 
        grid-template-columns: 1fr; 
    }

    .section-header {
        flex-direction: column;
        align-items: center; /* center the title and filters */
        gap: 0.8rem;
    }
    .filters {
        width: 100%;
        justify-content: center; /* center the filter buttons */
    }

    .header-actions {
        padding: 0.5rem 0.3rem;
        border-radius: 8px;
    }

    #themeToggle img {
        width: 15px; 
        height: 15px;   
    }       
}