:root {
    --primary-base: #0866ff;
    --primary-light: #EBEFFF;
    --primary-border: #C6D2FE;
    --primary-accent: #0B5EC9;
    --primary-dark: #01183B;
    --error-color: #dc3545;

    --driftwood-0: #ffffff;
    --driftwood-1: #fafaf9;
    --driftwood-2: #f5f5f4;
    --driftwood-3: #e7e5e4;
    --driftwood-4: #d6d3d1;
    --driftwood-5: #a8a29e;
    --driftwood-6: #78716c;
    --driftwood-7: #57534e;
    --driftwood-8: #44403c;
    --driftwood-9: #292524;
    --driftwood-10: #1c1917;
    --driftwood-11: #0c0a09;

    --body: "Inter", serif;
    --heading: "Space Grotesk", serif;
    --mono: "Space Mono", serif;

    --font-size-heading1: 36px;
    --font-size-heading2: 32px;
    --font-size-heading3: 29px;
    --font-size-heading4: 26px;
    --font-size-heading5: 23px;
    --font-size-heading6: 20px;
    --font-size-subtitle: 18px;
    --font-size-body: 16px;
    --font-size-caption: 14px;
    --font-size-label: 13px;
    --font-size-tagline: 11px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--body);
    font-optical-sizing: auto;
    font-feature-settings: 'liga' 1, 'calt' 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    transition: all .24s ease-in-out;
    line-height: 1.5;
    color: var(--frostDark-12);
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

body {
    background-color: var(--driftwood-1);
    margin: 0;
    padding: 0;
    overflow-y: scroll;
}

header {
    width: 100%;
    padding: 12px 16px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

header>div {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 64px;
}

h1 {
    font-family: var(--heading);
    font-size: var(--font-size-heading4);
}

header>div>div>p {
    font-size: var(--font-size-caption);
    color: var(--driftwood-6);
    line-height: 1.6;
}

header a {
    color: var(--driftwood-8);
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 4px;
    text-decoration-color: var(--driftwood-4);
    transition: color 0.3s ease-in-out, text-decoration-color 0.3s ease-in-out;
    word-wrap: break-word;
    white-space: normal;
}

header a:hover {
    color: var(--driftwood-9);
    text-decoration-color: var(--driftwood-6);
}

header>div>div {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    flex: 1;
}

button {
    display: block;
    padding: 8px 18px;
    font-size: var(--font-size-caption);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--driftwood-3);
    box-shadow: inset 1px 3px 4px 1px var(--driftwood-0);
    border-radius: 50px;
    background-color: var(--driftwood-2);
    color: var(--driftwood-11);
    white-space: nowrap;
}


button:hover {
    background-color: var(--driftwood-0);
    box-shadow: inset 2px 4px 8px 4px var(--driftwood-2);
}


header>aside {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.search-container {
    flex: .87;
    width: 100%;
    font-size: var(--font-size-caption);
}

.sort-container {
    flex: .13;
    width: 100%;
}

#sort {
    padding: 10px;
    width: 100%;
    font-size: var(--font-size-caption);
}

input,
#sort {
    padding: 12px 16px;
    width: 100%;
    background-color: var(--driftwood-0);
    border: 1px solid var(--driftwood-2);
    border-radius: 12px;
    white-space: nowrap;
}

input:hover,
#sort:hover {
    border: 1px solid var(--driftwood-3);
}

input:focus,
#sort:focus {
    outline: none;
    border: 1px solid var(--driftwood-5);
}

.container {
    width: 100%;
    margin: auto;
    overflow: hidden;
}

footer {
    padding: 16px;
    font-size: var(--font-size-caption);
    line-height: 1.6;
    color: var(--driftwood-9);
}

.loader,
.progress {
    font-size: var(--font-size-body);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 24px 0;
    text-align: center;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary-base);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.progress {
    font-size: 1em;
    margin-top: 10px;
}


.feeds-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(342px, 1fr));
    gap: 16px;
    padding: 16px;
}

.feed-card .buttons {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 4px;
    margin: 8px 0;
}

.feed-card .buttons button {
    padding: 4px 12px;
    font-size: var(--font-size-label);
    font-weight: 500;
    border-radius: 50px;
    border: 1px solid var(--driftwood-3);
    background-color: var(--driftwood-0);
    cursor: pointer;
}

.feed-card {
    background-color: var(--driftwood-0);
    border: 1px solid var(--driftwood-2);
    border-radius: 16px;
    padding: 16px;
    width: 100%;
}

.feed-card:hover {
    box-shadow: 0 0 8px 4px var(--driftwood-2);
    transform: scale(1.01);
}

.feed-card i {
    color: var(--error-color);
}

.feed-card aside {
    font-size: var(--font-size-label);
    color: var(--driftwood-9);
    margin: 4px 0 2px;
}

.feed-card h2 {
    font-family: var(--heading);
    font-size: var(--font-size-heading6);
}

.feed-card p {
    font-size: var(--font-size-caption);
    color: var(--driftwood-8);
}

.feed-card .subtle {
    font-size: var(--font-size-tagline);
    color: var(--driftwood-6);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: flex-start;
    padding-top: 48px;
    overflow-y: auto;
}

.modal-content {
    background-color: var(--driftwood-1);
    padding: 16px;
    border-radius: 20px;
    width: 100%;
    margin: 32px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content .modal-input-container {
    display: flex;
    gap: 16px;
    white-space: nowrap;
    margin: 8px 0;
}

::-webkit-scrollbar {
    width: 8px;
    height: 12px;
    transition: background-color 0.2s ease;
}

::-webkit-scrollbar-thumb {
    background-color: var(--driftwood-4);
    border-radius: 10px;
    transition: background-color 0.2s ease;
    scroll-behavior: smooth;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--driftwood-6);
}

::-webkit-scrollbar-track {
    background-color: none;
    border-radius: 10px;
    transition: background-color 0.2s ease;
}


/* Responsive design */
@media (max-width: 1024px) {
    header>div>div {
        flex: 1;
    }

    header>div {
        gap: 40px;
    }

    .search-container {
        flex: .75;
    }

    .sort-container {
        flex: .25;
    }

    .modal-content .feeds-container {
        padding: 16px 0;
    }
}

@media (max-width: 540px) {
    header>div {
        gap: 8px;
        flex-direction: column;
    }

    header>aside {
        flex-direction: column;
        gap: 8px;
    }

    header>div>div>p {
        font-size: var(--font-size-tagline);
    }

    .search-container {
        flex: 1.0;
    }

    .sort-container {
        flex: 1.0;
    }

    .modal-content .modal-input-container {
        flex-direction: column;
    }

    .modal-content {
        margin: 0;
        padding: 16px;
        border-radius: 20px 20px 0 0;
    }

    .modal {
        top: auto;
        bottom: 0;
        padding-top: 0;
        justify-content: flex-end;
        align-items: flex-end;
    }

    h1 {
        font-size: var(--font-size-heading6);
    }

    .feed-card {
        padding: 12px;
        border: 1px solid var(--driftwood-3);
    }

    .feed-card .buttons button {
        padding: 2px 12px;
    }

    .feed-card h2 {
        font-size: var(--font-size-subtitle);
    }

}

.no-results {
    width: 100%;
    text-align: center;
    padding: 40px 20px;
}

.no-results-message {
    background-color: var(--driftwood-0);
    border: 1px solid var(--driftwood-2);
    border-radius: 24px;
    padding: 24px;
    max-width: 500px;
    margin: 0 auto;
}

.no-results-message h3 {
    color: var(--driftwood-8);
    margin-bottom: 8px;
    font-family: var(--heading);
}

.no-results-message p {
    color: var(--driftwood-6);
    font-size: var(--font-size-caption);
}

.progress {
    text-align: center;
    line-height: 1.6;
}