/*
Theme Name: META CRAFTS
Theme URI: https://metacrafts.art/
Author: KAZUHITO MAEKAWA
Description: META CRAFTS学会 オフィシャルサイト用WordPressテーマ
Version: 1.0.0
Text Domain: metacrafts
*/

/* ================================================
   CSS カスタムプロパティ
================================================ */
:root {
    --black:      #f5f5f3;       /* 背景：オフホワイト */
    --white:      #1a1a1a;       /* テキスト：ほぼ黒 */
    --accent:     #e81919;       /* 赤アクセント */
    --accent-dim: rgba(232,25,25,0.08);
    --gray:       #666660;
    --border:     rgba(232,25,25,0.18);
    --font-serif: "Cormorant Garamond", "Noto Serif JP", "游明朝", serif;
    --font-sans:  "Jost", "Noto Sans JP", sans-serif;
    --font-mono:  "IBM Plex Mono", monospace;
    --max-width:  1100px;
    --ease:       0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ================================================
   Reset / Base
================================================ */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:16px; }
body {
    background: var(--black);
    color: var(--white);
    font-family: var(--font-sans);
    font-weight: 300;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    letter-spacing: 0.02em;
}
img { max-width:100%; height:auto; display:block; }
a   { color:inherit; text-decoration:none; transition:color var(--ease), opacity var(--ease); }
ul  { list-style:none; padding:0; margin:0; }
button { cursor:pointer; border:none; background:none; font-family:inherit; }

/* ================================================
   グリッド / レイアウト
================================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
}
.section { padding: 100px 0; }

/* ================================================
   ヘッダー
================================================ */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    border-bottom: 1px solid transparent;
    transition: border-color var(--ease), background var(--ease);
    padding: 20px 0;
}
.site-header.scrolled {
    background: rgba(245,245,243,0.97);
    border-bottom-color: var(--border);
    padding: 14px 0;
}
.site-header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.site-logo {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--white);
}
.site-logo span {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.55rem;
    letter-spacing: 0.35em;
    color: var(--accent);
    margin-top: 3px;
}
.global-nav ul {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}
.global-nav a {
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gray);
    transition: color var(--ease);
}
.global-nav a:hover,
.global-nav a.current { color: var(--white); }

.nav-toggle { display:none; padding:8px; }
.nav-toggle span {
    display:block; width:24px; height:1px;
    background:var(--white); margin:6px 0;
    transition:transform var(--ease), opacity var(--ease);
}

/* ================================================
   ヒーロー
================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 0 0 80px;
    position: relative;
    overflow: hidden;
}
.hero__bg {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, #f5f5f3 0%, #eeede8 50%, #f5f5f3 100%);
    z-index: 0;
}
/* グリッドパターン装飾 */
.hero__grid {
    position: absolute; inset: 0; z-index: 0;
    background-image:
        linear-gradient(rgba(232,25,25,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(232,25,25,0.06) 1px, transparent 1px);
    background-size: 60px 60px;
}
.hero__content {
    position: relative; z-index: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
}
.hero__label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.hero__label::before {
    content: "";
    display: block;
    width: 40px;
    height: 1px;
    background: var(--accent);
}
.hero__title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 7vw, 7rem);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: 0.05em;
    color: var(--white);
    margin-bottom: 2rem;
}
.hero__title em {
    font-style: italic;
    color: var(--accent);
}
.hero__subtitle {
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    color: var(--gray);
    max-width: 500px;
    line-height: 1.9;
}
.hero__scroll {
    position: absolute;
    right: 40px;
    bottom: 80px;
    z-index: 1;
    writing-mode: vertical-rl;
    font-size: 0.6rem;
    letter-spacing: 0.25em;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 12px;
}
.hero__scroll::after {
    content: "";
    display: block;
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollLine 2s ease infinite;
}
@keyframes scrollLine {
    0%   { transform:scaleY(0); transform-origin:top; }
    50%  { transform:scaleY(1); transform-origin:top; }
    51%  { transform:scaleY(1); transform-origin:bottom; }
    100% { transform:scaleY(0); transform-origin:bottom; }
}

/* ================================================
   セクション見出し
================================================ */
.section-label {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.3em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.section-label::before {
    content: "";
    display: block;
    width: 30px;
    height: 1px;
    background: var(--accent);
}
.section-heading {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--white);
    margin-bottom: 3rem;
    line-height: 1.15;
}

/* ================================================
   お知らせ（NEWS）
================================================ */
.news-section {
    border-top: 1px solid var(--border);
    background: #ffffff;
}
.news-list { border-top: 1px solid var(--border); }
.news-item { border-bottom: 1px solid var(--border); }
.news-item__btn {
    display: flex;
    align-items: baseline;
    gap: 2rem;
    width: 100%;
    padding: 1.4rem 0;
    color: var(--white);
    text-align: left;
    transition: opacity var(--ease);
}
.news-item__btn:hover { opacity: 0.6; }
.news-item__date {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--accent);
    flex-shrink: 0;
    min-width: 7em;
}
.news-item__cat {
    font-size: 0.62rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 2px 8px;
    border: 1px solid var(--border);
    color: var(--gray);
    flex-shrink: 0;
}
.news-item__title {
    flex: 1;
    font-size: 0.88rem;
    line-height: 1.6;
}
.news-item__arrow {
    font-size: 0.8rem;
    color: var(--accent);
    flex-shrink: 0;
    transition: transform var(--ease);
}
.news-item__btn:hover .news-item__arrow { transform: translateX(5px); }
.news-archive-link {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    padding-bottom: 2px;
    transition: border-color var(--ease);
}
.news-archive-link:hover { border-color: var(--accent); }
.news-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ================================================
   論文・研究（PAPERS）
================================================ */
.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2px;
}
.paper-card {
    background: rgba(0,0,0,0.02);
    border: 1px solid var(--border);
    padding: 2rem;
    transition: background var(--ease), border-color var(--ease);
    position: relative;
    overflow: hidden;
}
.paper-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 2px;
    height: 0;
    background: var(--accent);
    transition: height var(--ease);
}
.paper-card:hover { background: rgba(200,169,110,0.04); border-color: rgba(200,169,110,0.4); }
.paper-card:hover::before { height: 100%; }
.paper-card__cat {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
}
.paper-card__title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--white);
    margin-bottom: 0.75rem;
}
.paper-card__meta {
    font-size: 0.72rem;
    color: var(--gray);
    line-height: 1.7;
}
.paper-card__year {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent);
    margin-top: 1.5rem;
}
.paper-card a { display:block; height:100%; }

/* ================================================
   ABOUTセクション
================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}
.about-text p {
    font-size: 0.9rem;
    line-height: 2;
    color: rgba(30,30,30,0.8);
    margin-bottom: 1.4em;
}
.about-text strong { color: var(--white); font-weight: 400; }
.about-def {
    border-left: 2px solid var(--accent);
    padding-left: 2rem;
}
.about-def__term {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 1rem;
}
.about-def__desc {
    font-size: 0.82rem;
    line-height: 2;
    color: var(--gray);
}

/* ================================================
   活動報告（ACTIVITIES）
================================================ */
.activities-list { }
.activity-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    align-items: start;
}
.activity-item:first-child { border-top: 1px solid var(--border); }
.activity-item__date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--accent);
    padding-top: 3px;
}
.activity-item__title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--white);
    margin-bottom: 0.5rem;
    line-height: 1.5;
}
.activity-item__body {
    font-size: 0.82rem;
    color: var(--gray);
    line-height: 1.8;
}
.activity-item__cat {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.58rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 2px 7px;
    border: 1px solid var(--border);
    color: var(--gray);
    margin-bottom: 0.6rem;
}

/* ================================================
   モーダル
================================================ */
.news-modal {
    position: fixed; inset: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
}
.news-modal[hidden] { display: none; }
.news-modal__backdrop {
    position: absolute; inset: 0;
    background: rgba(0,0,0,0.7);
    cursor: pointer;
    backdrop-filter: blur(4px);
}
.news-modal__panel {
    position: relative; z-index: 1;
    background: #ffffff;
    border: 1px solid var(--border);
    width: min(700px, 92vw);
    max-height: 85vh;
    overflow-y: auto;
    padding: 52px 52px 48px;
    animation: modalIn .3s cubic-bezier(0.4,0,0.2,1) both;
}
.news-modal__close {
    position: absolute; top: 18px; right: 22px;
    font-size: 1.2rem;
    color: var(--gray);
    font-weight: 300;
    transition: color var(--ease);
}
.news-modal__close:hover { color: var(--white); }
.news-modal__loading { color: var(--gray); font-size: .82rem; text-align:center; padding:3rem 0; }
.modal-date { font-family:var(--font-mono); font-size:.7rem; color:var(--accent); margin-bottom:.5rem; }
.modal-cat  { font-family:var(--font-mono); font-size:.6rem; letter-spacing:.15em; text-transform:uppercase; color:var(--gray); margin-bottom:1.5rem; }
.modal-title {
    font-family: var(--font-serif);
    font-size: clamp(1.2rem,3vw,1.8rem);
    font-weight: 400;
    line-height: 1.4;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    color: #1a1a1a;
}
.modal-body { font-size:.85rem; line-height:2; color:rgba(30,30,30,.85); }
.modal-body p { margin-bottom:1em; }
.modal-body a { color:var(--accent); border-bottom:1px solid var(--border); }

/* ================================================
   ボタン
================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .75rem;
    padding: .75rem 2rem;
    border: 1px solid var(--border);
    font-family: var(--font-sans);
    font-size: .72rem;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--white);
    transition: background var(--ease), border-color var(--ease), color var(--ease);
}
.btn:hover { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.btn--accent { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.btn--accent:hover { background: var(--accent); color: var(--black); }

/* ================================================
   フッター
================================================ */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 60px 0 40px;
    background: #eeede8;
}
.site-footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 2rem;
}
.site-footer__logo {
    font-family: var(--font-serif);
    font-size: 1rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--white);
}
.site-footer__logo span {
    display: block;
    font-family: var(--font-mono);
    font-size: .55rem;
    letter-spacing: .3em;
    color: var(--accent);
    margin-top: 4px;
}
.site-footer__copy {
    font-family: var(--font-mono);
    font-size: .62rem;
    letter-spacing: .1em;
    color: var(--gray);
}
.site-footer__nav {
    display: flex;
    gap: 2rem;
}
.site-footer__nav a {
    font-size: .68rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--gray);
    transition: color var(--ease);
}
.site-footer__nav a:hover { color: var(--white); }

/* ================================================
   ページヘッダー（下層ページ）
================================================ */
.page-hero {
    padding: 180px 0 80px;
    border-bottom: 1px solid var(--border);
    background: #eeede8;
}
.page-hero .container { position: relative; }
.page-hero__label {
    font-family: var(--font-mono);
    font-size: .62rem;
    letter-spacing: .3em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 1.5rem;
}
.page-hero__title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 400;
    letter-spacing: .06em;
    line-height: 1.1;
    color: var(--white);
}

/* ================================================
   論文詳細ページ
================================================ */
.paper-detail { max-width: 760px; margin: 0 auto; padding: 80px 0; }
.paper-detail__header { margin-bottom: 3rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border); }
.paper-detail__cat {
    font-family: var(--font-mono);
    font-size: .62rem;
    letter-spacing: .25em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.2rem;
}
.paper-detail__title {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    font-weight: 400;
    line-height: 1.3;
    color: var(--white);
    margin-bottom: 1.2rem;
}
.paper-detail__meta {
    font-family: var(--font-mono);
    font-size: .7rem;
    color: var(--gray);
    line-height: 2;
}
.paper-detail__body {
    font-size: .92rem;
    line-height: 2.1;
    color: rgba(30,30,30,.85);
}
.paper-detail__body h2 { font-family:var(--font-serif); font-size:1.5rem; font-weight:400; margin:3rem 0 1rem; color:var(--white); }
.paper-detail__body h3 { font-size:1rem; font-weight:400; margin:2rem 0 .75rem; color:var(--accent); letter-spacing:.05em; }
.paper-detail__body p  { margin-bottom:1.4em; }
.paper-detail__body a  { color:var(--accent); border-bottom:1px solid var(--border); }
.paper-detail__body blockquote {
    border-left: 2px solid var(--accent);
    padding: 1rem 2rem;
    margin: 2rem 0;
    color: var(--gray);
    font-style: italic;
}

/* ================================================
   アニメーション
================================================ */
@keyframes fadeUp {
    from { opacity:0; transform:translateY(24px); }
    to   { opacity:1; transform:translateY(0); }
}
@keyframes modalIn {
    from { opacity:0; transform:translateY(12px); }
    to   { opacity:1; transform:translateY(0); }
}
.fade-in { opacity:0; transform:translateY(20px); transition:opacity .8s cubic-bezier(.4,0,.2,1), transform .8s cubic-bezier(.4,0,.2,1); }
.fade-in.visible { opacity:1; transform:none; }

/* ================================================
   ページネーション
================================================ */
.pagination { display:flex; justify-content:center; gap:.5rem; margin-top:4rem; }
.pagination .page-numbers {
    display:inline-block; padding:8px 14px;
    border:1px solid var(--border);
    font-family:var(--font-mono); font-size:.7rem; letter-spacing:.1em;
    color:var(--gray);
    transition:background var(--ease), color var(--ease), border-color var(--ease);
}
.pagination .page-numbers.current,
.pagination .page-numbers:hover { background:var(--accent-dim); border-color:var(--accent); color:var(--accent); }

/* ================================================
   Responsive
================================================ */
@media (max-width:900px) {
    .container { padding:0 24px; }
    .site-header__inner { padding:0 24px; }
    .global-nav { display:none; }
    .global-nav.is-open {
        display:flex; position:fixed; inset:0;
        background:rgba(245,245,243,.98);
        flex-direction:column; align-items:center; justify-content:center;
        z-index:200;
    }
    .global-nav.is-open ul { flex-direction:column; gap:2rem; font-size:1rem; }
    .nav-toggle { display:block; z-index:201; }
    .about-grid { grid-template-columns:1fr; gap:40px; }
    .activity-item { grid-template-columns:1fr; gap:.5rem; }
    .papers-grid { grid-template-columns:1fr; }
    .hero__scroll { display:none; }
    .news-modal__panel { padding:32px 24px 28px; }
    .site-footer__inner { flex-direction:column; align-items:flex-start; }
}
@media (max-width:640px) {
    .section { padding:70px 0; }
    .hero { padding-bottom:60px; }
}