/* ══ ARCHIVE — sidebar + horizontal post rows ══ */

:root {
    --hatch-ux: #667eea;
    --hatch-ecommerce: #10b981;
    --hatch-ai: #f59e0b;
    --hatch-libraries: #ec4899;
    --hatch-data: #06b6d4;
    --hatch-neutral: #3f3f46;
    --hatch-ip: #c5ea66;
}

[data-theme="dark"] {
    --hatch-neutral: #71717A;
}

/* Full-bleed page: padding lives inside sections, not on theme-wrapper child */
#theme-wrapper:has(> .arc-page) {
    flex: 1;
    display: flex;
    flex-direction: column;
}

#theme-wrapper > .arc-page {
    padding-left: 0;
    padding-right: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.arc-page {
    padding: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Container only splits columns — no padding, no gap */
.arc-layout {
    display: grid;
    grid-template-columns: minmax(280px, 350px) minmax(0, 1fr);
    gap: 0;
    align-items: stretch;
    flex: 1;
    padding: 0;
    min-height: 100%;
}

/* ── Section A — sidebar ── */

.arc-sidebar {
    border-right: 1px solid var(--c-border);
    border-left: 0px;
    padding: clamp(1rem, 2vw, 1.25rem) clamp(1.25rem, 2vw, 1.75rem) clamp(3rem, 6vw, 5rem) clamp(1rem, 2vw, 2rem);
    align-self: stretch;
}

.arc-sidebar-sticky {
    position: sticky;
    top: 5.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.arc-sidebar-head {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.arc-eyebrow {
    font-family: "Geist Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-text-tertiary);
}

.arc-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 900;
    line-height: 1.08;
    letter-spacing: -0.025em;
    color: var(--c-text-primary);
    margin: 0;
}

.arc-subtitle {
    font-size: 0.92rem;
    line-height: 1.65;
    margin: 0;
    max-width: 24rem;
}

.arc-search {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.arc-search-label {
    font-family: "Geist Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-text-tertiary);
}

.arc-search-form {
    display: flex;
    gap: 0.5rem;
}

.arc-search-input {
    flex: 1;
    min-width: 0;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    background: var(--c-background);
    color: var(--c-text-primary);
    font-size: 0.85rem;
    font-family: inherit;
}

.arc-search-input:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--hatch-ux) 45%, var(--c-border));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--hatch-ux) 12%, transparent);
}

.arc-search-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.35rem;
    height: 2.35rem;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    background: var(--c-background-gray);
    color: var(--c-text-secondary);
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.arc-search-btn:hover {
    border-color: var(--c-text-primary);
    color: var(--c-text-primary);
}

.arc-filters {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.arc-filters-label {
    font-family: "Geist Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--c-text-tertiary);
}

.arc-filter-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.arc-filter-list > li {
    display: contents;
}

.arc-filter-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.38rem 0.45rem 0.38rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--c-border);
    background: var(--c-background);
    text-decoration: none;
    color: var(--c-text-secondary);
    font-size: 0.72rem;
    line-height: 1;
    white-space: nowrap;
    transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
}

.arc-filter-link:hover {
    background: var(--c-background-gray);
    color: var(--c-text-primary);
    border-color: color-mix(in srgb, var(--filter-color, var(--c-text-primary)) 25%, var(--c-border));
}

.arc-filter-link.is-active {
    background: color-mix(in srgb, var(--filter-color, var(--hatch-neutral)) 10%, var(--c-background));
    border-color: color-mix(in srgb, var(--filter-color, var(--hatch-neutral)) 40%, var(--c-border));
    color: var(--c-text-primary);
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--filter-color, transparent) 15%, transparent);
}

.arc-filter-name {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.arc-filter-name::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--filter-color, var(--c-border));
    flex-shrink: 0;
}

.arc-filter-link--all .arc-filter-name::before {
    background: var(--c-text-tertiary);
}

.arc-filter-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.2rem;
    height: 1.2rem;
    padding: 0 0.35rem;
    border-radius: 999px;
    font-family: "Geist Mono", monospace;
    font-size: 0.55rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--c-text-secondary);
    background: var(--c-background-gray);
    border: 1px solid var(--c-border);
    flex-shrink: 0;
}

.arc-filter-link.is-active .arc-filter-count {
    color: var(--filter-color, var(--c-text-primary));
    background: color-mix(in srgb, var(--filter-color, var(--hatch-neutral)) 14%, var(--c-background));
    border-color: color-mix(in srgb, var(--filter-color, var(--hatch-neutral)) 30%, var(--c-border));
}

.arc-active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.arc-active-chip {
    font-family: "Geist Mono", monospace;
    font-size: 0.58rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--c-border);
    color: var(--c-text-secondary);
    background: var(--c-background-gray);
}

.arc-clear-link {
    font-family: "Geist Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-text-tertiary);
    text-decoration: none;
}

.arc-clear-link:hover {
    color: var(--c-text-primary);
}

/* ── Section B — post list ── */

.arc-main {
    min-width: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-self: stretch;
    overflow-x: clip;
}

.arc-results-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0;
    padding: clamp(1rem, 2vw, 1.25rem) clamp(1rem, 2vw, 2rem);
    border-bottom: 1px solid var(--c-border);
}

.arc-results-count {
    font-family: "Geist Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--c-text-tertiary);
}

.arc-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: clamp(1.25rem, 2.5vw, 1.75rem) clamp(1rem, 2vw, 2rem) clamp(3rem, 6vw, 5rem);
    flex: 1;
}

/* ── Horizontal post row ── */

.arc-post {
    display: grid;
    grid-template-columns: minmax(200px, 36%) minmax(0, 1fr);
    border: 1px solid var(--c-border);
    border-radius: 14px;
    background: var(--c-background);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.arc-post:hover {
    border-color: color-mix(in srgb, var(--post-accent, var(--hatch-neutral)) 38%, var(--c-border));
    box-shadow: 0 8px 28px color-mix(in srgb, var(--post-accent, var(--hatch-neutral)) 10%, transparent);
    transform: translateY(-2px);
}

.arc-post-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: color-mix(in srgb, var(--post-accent, var(--hatch-neutral)) 7%, var(--c-background-gray));
    border-right: 1px solid var(--c-border);
    text-decoration: none;
    overflow: hidden;
    position: relative;
}

.arc-post-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.45s ease;
}

.arc-post:hover .arc-post-visual img {
    transform: scale(1.03);
}

.arc-post-placeholder {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 900;
    letter-spacing: -0.05em;
    line-height: 1;
    color: color-mix(in srgb, var(--post-accent, var(--hatch-neutral)) 24%, var(--c-border));
    user-select: none;
}

.arc-post-body {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    padding: 1.25rem 1.35rem 1.2rem;
    min-width: 0;
}

.arc-post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
}

.arc-post-date {
    font-family: "Geist Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.05em;
    color: var(--c-text-tertiary);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.arc-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.arc-post-tag {
    font-family: "Geist Mono", monospace;
    font-size: 0.56rem;
    letter-spacing: 0.04em;
    text-transform: lowercase;
    padding: 0.18rem 0.45rem;
    border-radius: 3px;
    border: 1px solid color-mix(in srgb, var(--tag-color, var(--c-border)) 35%, var(--c-border));
    color: var(--tag-color, var(--c-text-tertiary));
    background: color-mix(in srgb, var(--tag-color, transparent) 6%, var(--c-background));
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
}

.arc-post-tag:hover {
    background: color-mix(in srgb, var(--tag-color, transparent) 12%, var(--c-background));
    border-color: color-mix(in srgb, var(--tag-color, var(--c-border)) 55%, var(--c-border));
}

.arc-post-tag--muted {
    cursor: default;
    color: var(--c-text-tertiary);
    border-color: var(--c-border);
    background: var(--c-background-gray);
}

.arc-post-tag--muted:hover {
    background: var(--c-background-gray);
    border-color: var(--c-border);
}

.arc-post-title {
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    font-weight: 700;
    line-height: 1.28;
    letter-spacing: -0.02em;
    margin: 0;
}

.arc-post-title a {
    color: var(--c-text-primary);
    text-decoration: none;
}

.arc-post-title a:hover {
    color: var(--post-accent, var(--c-text-primary));
}

.arc-post-summary {
    font-size: 0.86rem;
    line-height: 1.65;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.arc-post-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: auto;
    padding-top: 0.35rem;
}

.arc-post-cta {
    font-family: "Geist Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--post-accent, var(--hatch-neutral));
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    text-decoration: none;
}

.arc-post-cta i {
    transition: transform 0.2s ease;
}

.arc-post:hover .arc-post-cta i {
    transform: translateX(3px);
}

.arc-empty {
    text-align: center;
    padding: 4rem 2rem;
    border: 1px dashed var(--c-border);
    border-radius: 14px;
    color: var(--c-text-secondary);
}

.arc-empty p {
    margin: 0 0 1rem;
}

/* ── Notes board (horizontal Trello-style columns) ── */

.notes-board-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
    padding-block: clamp(1.25rem, 2.5vw, 1.75rem) clamp(3rem, 6vw, 5rem);
    scrollbar-width: thin;
}

.notes-board-scroll::-webkit-scrollbar {
    height: 6px;
}

.notes-board-scroll::-webkit-scrollbar-thumb {
    background: var(--c-border);
    border-radius: 999px;
}

.notes-board {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 1rem;
    width: max-content;
    padding-inline: clamp(1rem, 2vw, 2rem);
}

.notes-column {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    flex: 0 0 280px;
    width: 280px;
    min-height: 200px;
    max-height: calc(100vh - 12rem);
    padding: 0.85rem;
    border: 1px solid var(--c-border);
    border-radius: 12px;
    background: color-mix(in srgb, var(--col-color, var(--hatch-neutral)) 4%, var(--c-background));
    overflow-y: auto;
}

.notes-column-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--c-border);
    border-top: 3px solid var(--col-color, var(--hatch-neutral));
    padding-top: 0.35rem;
}

.notes-column-title {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--c-text-primary);
    text-decoration: none;
}

.notes-column-title:hover {
    color: var(--col-color, var(--c-text-primary));
}

.notes-column-count {
    font-family: "Geist Mono", monospace;
    font-size: 0.58rem;
    letter-spacing: 0.05em;
    color: var(--c-text-tertiary);
    background: var(--c-background-gray);
    border: 1px solid var(--c-border);
    border-radius: 999px;
    padding: 0.15rem 0.45rem;
}

.notes-column-cards {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.notes-column-empty {
    font-size: 0.78rem;
    color: var(--c-text-tertiary);
    margin: 0.25rem 0;
}

.notes-column-more {
    font-family: "Geist Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--col-color, var(--c-text-secondary));
    text-decoration: none;
    margin-top: 0.15rem;
}

.note-card {
    position: relative;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    background: var(--c-background);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.note-card:hover {
    border-color: color-mix(in srgb, var(--note-accent, var(--hatch-neutral)) 35%, var(--c-border));
    box-shadow: 0 4px 14px color-mix(in srgb, var(--note-accent, var(--hatch-neutral)) 8%, transparent);
}

.note-card-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.65rem 0.7rem;
    text-decoration: none;
    color: inherit;
}

.note-card-title {
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--c-text-primary);
}

.note-card-date {
    font-family: "Geist Mono", monospace;
    font-size: 0.55rem;
    color: var(--c-text-tertiary);
}

.note-card-summary {
    font-size: 0.72rem;
    line-height: 1.5;
    color: var(--c-text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.note-card-badge {
    position: absolute;
    top: 0.4rem;
    right: 0.4rem;
    font-family: "Geist Mono", monospace;
    font-size: 0.48rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--c-text-tertiary);
    background: var(--c-background-gray);
    border: 1px solid var(--c-border);
    border-radius: 3px;
    padding: 0.1rem 0.3rem;
}

/* ── Responsive ── */

@media (max-width: 960px) {
    .arc-layout {
        grid-template-columns: 1fr;
    }

    .arc-sidebar {
        border-right: none;
        border-bottom: 1px solid var(--c-border);
        padding: clamp(1rem, 2vw, 1.25rem) clamp(1rem, 2vw, 2rem) clamp(1.5rem, 3vw, 2rem);
    }

    .arc-sidebar-sticky {
        position: static;
    }
}

@media (max-width: 700px) {
    .arc-post {
        grid-template-columns: 1fr;
    }

    .arc-post-visual {
        min-height: 180px;
        border-right: none;
        border-bottom: 1px solid var(--c-border);
    }
}