/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   DSLab · Articles — 月刊手記
   雜誌式不對稱 masonry + 影片分類 + 捲動漸進揭露
   沿用 dslab.css 的紙／墨／朱印紅與字體變數
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.articles-main {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: clamp(2.5rem, 5vw, 4.5rem) var(--pad-x) 0;
}

/* ── Section head ───────────────────────────── */
.art-head {
    max-width: 920px;
    padding-bottom: clamp(2rem, 4vw, 3.2rem);
    border-bottom: 1px solid var(--rule-strong);
}

.art-eyebrow {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--vermilion);
    letter-spacing: 0.28em;
    text-transform: uppercase;
    margin-bottom: 1.6rem;
}

.art-title {
    font-family: var(--sans);
    font-weight: 800;
    font-size: clamp(3.5rem, 9vw, 7rem);
    line-height: 0.92;
    letter-spacing: -0.04em;
    color: var(--ink);
    margin-bottom: 1.6rem;
}

.art-sub {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: clamp(1rem, 1.3vw, 1.2rem);
    font-weight: 400;
    line-height: 1.85;
    color: var(--ink-dim);
    max-width: 40ch;
    margin-bottom: 1.8rem;
}

.art-meta {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--ink-fade);
    letter-spacing: 0.1em;
}

/* ── Filter ─────────────────────────────────── */
.art-filter {
    position: sticky;
    top: 64px;
    z-index: 40;
    display: flex;
    gap: 0.5rem;
    padding: 1.2rem 0;
    margin-bottom: 1rem;
    background: linear-gradient(180deg, var(--paper) 70%, rgba(244, 241, 232, 0));
}

.art-filter button {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 0.86rem;
    letter-spacing: 0.02em;
    color: var(--ink-dim);
    background: transparent;
    border: 1px solid var(--rule-strong);
    border-radius: 999px;
    padding: 0.5rem 1.4rem;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.art-filter button:hover {
    color: var(--ink);
    border-color: var(--ink-faint);
}

.art-filter button.active {
    color: var(--paper);
    background: var(--ink);
    border-color: var(--ink);
}

/* 月份跳轉條（filter bar 右側，縱年×橫月）*/
.month-jump {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    margin-left: 1.1rem;
    padding-left: 1.1rem;
    border-left: 1px solid var(--rule);
    flex: 1;
    min-width: 0;
}

.mj-label {
    font-size: 0.72rem;
    color: var(--ink-fade);
    letter-spacing: 0.04em;
    margin-right: 0.25rem;
}

.mj-item {
    font-size: 0.72rem;
    color: var(--ink-dim);
    background: transparent;
    border: 1px solid var(--rule);
    border-radius: 999px;
    padding: 0.22rem 0.6rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.mj-item:hover {
    color: var(--vermilion-deep);
    border-color: var(--vermilion);
}

.mj-item.active {
    color: var(--paper);
    background: var(--ink);
    border-color: var(--ink);
}

.art-loading {
    color: var(--ink-fade);
    letter-spacing: 0.2em;
    padding: 4rem 0;
    text-align: center;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* 最新（圖文）：左月份引導列 + 內容      */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.zine-view[hidden],
.video-view[hidden] { display: none; }

.zine-view,
.video-view {
    display: grid;
    grid-template-columns: 92px 1fr;
    gap: clamp(1.5rem, 3vw, 3rem);
    align-items: start;
}

.month-rail {
    position: sticky;
    top: 130px;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    max-height: calc(100dvh - 160px);
    overflow-y: auto;
    padding-right: 0.4rem;
    scrollbar-width: thin;
}

.rail-item {
    display: flex;
    flex-direction: column;
    padding: 0.4rem 0;
    border-left: 2px solid var(--rule);
    padding-left: 0.7rem;
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.rail-item .rail-y {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink);
    letter-spacing: 0.02em;
    line-height: 1.1;
}

.rail-item .rail-m {
    font-family: var(--mono);
    font-size: 0.66rem;
    color: var(--ink-fade);
    letter-spacing: 0.06em;
}

.rail-item:hover {
    border-left-color: var(--ink-faint);
    padding-left: 0.9rem;
}

.rail-item.active {
    border-left-color: var(--vermilion);
}

.rail-item.active .rail-y { color: var(--vermilion-deep); font-weight: 500; }
.rail-item.active .rail-m { color: var(--vermilion); }

.zine-content { min-width: 0; }

.card-imgs-more {
    position: absolute;
    right: 0.6rem;
    bottom: 0.6rem;
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--paper);
    background: rgba(11, 13, 14, 0.7);
    padding: 0.15rem 0.5rem;
    border-radius: 2px;
}

.card-imgs { position: relative; }

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* Month section                       */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.art-month {
    padding: clamp(2.5rem, 5vw, 4rem) 0;
    border-top: 1px solid var(--rule);
    scroll-margin-top: 120px;   /* 月份跳轉時避開 sticky 頂欄 */
}

.art-month:first-child {
    border-top: none;
}

.month-marker {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 2.5rem;
    cursor: default;
}

.mm-year {
    font-family: var(--sans);
    font-weight: 800;
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    line-height: 0.9;
    letter-spacing: -0.04em;
    color: var(--ink);
}

.mm-month {
    font-family: var(--mono);
    font-weight: 400;
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    color: var(--vermilion);
    letter-spacing: 0.05em;
}

.mm-count {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--ink-fade);
    letter-spacing: 0.1em;
    margin-left: auto;
    align-self: center;
}

.mm-rule {
    flex: 1;
    height: 1px;
    background: var(--rule-strong);
    align-self: center;
    max-width: 40%;
}

.mm-toggle {
    display: none;
    font-family: var(--mono);
    font-size: 1.2rem;
    color: var(--ink-dim);
    background: none;
    border: none;
    cursor: pointer;
}

/* ── Zine masonry（圖文）─────────────────────── */
.zine-grid {
    columns: 3;
    column-gap: 1.4rem;
}

.card {
    break-inside: avoid;
    margin-bottom: 1.4rem;
    border: 1px solid var(--rule);
    border-radius: 2px;
    background: var(--paper-warm);
    overflow: hidden;
    position: relative;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s cubic-bezier(0.2, 0.8, 0.2, 1),
                transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card.in {
    opacity: 1;
    transform: none;
}

.card:hover {
    background: var(--paper-warmer);
}

/* 純文字卡：朱印紅左 stripe */
.card-text {
    padding: 1.4rem 1.5rem 1.5rem;
    border-left: 3px solid var(--vermilion);
}

.card-date {
    display: block;
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-fade);
    letter-spacing: 0.12em;
    margin-bottom: 0.7rem;
}

.card-content {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.92rem;
    font-weight: 400;
    line-height: 1.75;
    color: var(--ink-dim);
    white-space: pre-wrap;
    word-break: break-word;
}

.card-content.clamp {
    display: -webkit-box;
    -webkit-line-clamp: 14;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-expand {
    margin-top: 0.8rem;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--vermilion);
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
}

/* 參考連結（當日零碎網址合併） */
.card-refs {
    margin-top: 1rem;
    padding-top: 0.8rem;
    border-top: 1px dashed var(--rule-strong);
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.refs-label {
    font-family: var(--mono);
    font-size: 0.64rem;
    color: var(--ink-fade);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    margin-bottom: 0.1rem;
}

.card-refs a {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--vermilion-deep);
    letter-spacing: 0.01em;
    word-break: break-all;
    line-height: 1.4;
    padding-left: 0.8rem;
    position: relative;
}

.card-refs a::before {
    content: '↳';
    position: absolute;
    left: 0;
    color: var(--ink-faint);
}

.card-refs a:hover { color: var(--vermilion); }

.card-refsonly { background: var(--paper); }

/* 圖文卡：圖片 */
.card-imgs {
    display: grid;
    gap: 2px;
    background: var(--paper-warmer);
}

.card-imgs.n1 { grid-template-columns: 1fr; }
.card-imgs.n2 { grid-template-columns: 1fr 1fr; }
.card-imgs.nmany { grid-template-columns: 1fr 1fr; }

.card-imgs img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    cursor: zoom-in;
    transition: opacity 0.3s;
    background: var(--paper-warmer);
}

.card-imgs.n1 img { max-height: 520px; }
.card-imgs.n2 img,
.card-imgs.nmany img { aspect-ratio: 1 / 1; }

.card-imgs img:hover { opacity: 0.92; }

.card-photo .card-body {
    padding: 1.1rem 1.3rem 1.3rem;
}

.card-photo .card-content {
    font-size: 0.88rem;
}

/* ── 影片格 ─────────────────────────────────── */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
}

.vcard {
    border: 1px solid var(--rule);
    border-radius: 2px;
    background: var(--ink);
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s cubic-bezier(0.2, 0.8, 0.2, 1),
                transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.vcard.in { opacity: 1; transform: none; }
.vcard.vcard-pending { cursor: default; }

.vthumb {
    position: relative;
    aspect-ratio: 16 / 10;
    background: #000;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vthumb video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.vthumb-yt {
    background-size: cover;
    background-position: center;
}

.vthumb-pending {
    background: repeating-linear-gradient(45deg, #16181a, #16181a 12px, #1c1f21 12px, #1c1f21 24px);
}

.vplay {
    position: absolute;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(11, 13, 14, 0.55);
    border: 1.5px solid rgba(244, 241, 232, 0.9);
    color: var(--paper);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    padding-left: 3px;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.vcard:hover .vplay {
    background: var(--vermilion);
    border-color: var(--vermilion);
    transform: scale(1.08);
}

.vtag {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    font-family: var(--mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    color: var(--paper);
    background: rgba(11, 13, 14, 0.65);
    padding: 0.2rem 0.5rem;
    border-radius: 2px;
}

.vthumb-pending .vtag {
    position: static;
    background: none;
    color: var(--ink-faint);
    font-size: 0.7rem;
}

.vcard-body { padding: 0.9rem 1.1rem 1.1rem; }

.vcard-date {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--vermilion);
    letter-spacing: 0.12em;
    display: block;
    margin-bottom: 0.5rem;
}

.vcard-content {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--paper-warm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    white-space: pre-wrap;
}

/* ── 影片小視窗（自適應影片尺寸） ───────────── */
.vmodal {
    position: fixed;
    inset: 0;
    z-index: 110;
    background: rgba(11, 13, 14, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3vw;
}

.vmodal[hidden] { display: none; }

.vm-stage {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 94vw;
    max-height: 90vh;
}

.vm-video {
    display: block;
    width: auto;
    height: auto;
    max-width: 94vw;
    max-height: 90vh;
    border-radius: 2px;
    box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.6);
    background: #000;
}

.vm-yt {
    width: min(94vw, 1280px);
    aspect-ratio: 16 / 9;
    max-height: 90vh;
}

.vm-yt iframe {
    width: 100%;
    height: 100%;
    border-radius: 2px;
}

.vm-close {
    position: absolute;
    top: 1.2rem;
    right: 1.6rem;
    font-size: 2.2rem;
    line-height: 1;
    color: var(--paper);
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--sans);
    z-index: 2;
}

/* ── Lightbox ───────────────────────────────── */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(11, 13, 14, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3vw;
}

.lightbox[hidden] { display: none; }

.lb-img {
    max-width: 94vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 2px;
    box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.6);
}

.lb-close {
    position: absolute;
    top: 1.2rem;
    right: 1.6rem;
    font-size: 2.2rem;
    line-height: 1;
    color: var(--paper);
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--sans);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* Responsive                          */
/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
@media (max-width: 1100px) {
    .zine-grid { columns: 2; }
    .video-grid { grid-template-columns: repeat(2, 1fr); }
    .zine-view,
    .video-view { grid-template-columns: 76px 1fr; }
}

@media (max-width: 760px) {
    /* 手機：每月下拉式 + 月份引導列改橫向 */
    .zine-grid { columns: 1; }
    .video-grid { grid-template-columns: 1fr; }

    .zine-view,
    .video-view { grid-template-columns: 1fr; }

    .month-rail {
        position: sticky;
        top: 104px;
        flex-direction: row;
        gap: 0.5rem;
        max-height: none;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 0.5rem 0;
        background: var(--paper);
        border-bottom: 1px solid var(--rule);
        z-index: 35;
    }
    .rail-item {
        flex-direction: row;
        align-items: baseline;
        gap: 0.25rem;
        border-left: none;
        border-bottom: 2px solid var(--rule);
        padding: 0.25rem 0.6rem;
        white-space: nowrap;
    }
    .rail-item:hover { padding-left: 0.6rem; }
    .rail-item.active { border-left: none; border-bottom-color: var(--vermilion); }

    .month-marker { cursor: pointer; }
    .mm-toggle { display: inline-block; margin-left: 0.4rem; }
    .mm-rule { display: none; }
    .mm-count { margin-left: auto; }

    #zine-content .art-month.collapsed .month-body { display: none; }

    .art-filter { top: 56px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .card, .vcard {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}