/* ==========================================================================
   Takuro Fujii — personal site
   Theme: "Cosmic Ink" — 深宇宙 × 水に垂れるインク × ターミナル
   - ダーク（デフォルト）/ ライトの2テーマ（html.light で切替）
   - 英語（デフォルト）/ 日本語の2言語(html.lang-ja で切替)
   - 配色は背景系 + グレー/白 + アクセント1色。ランダム色はインクのみ
   ========================================================================== */

:root{
  --bg-deep:#04050e;
  --bg:#070918;
  --fg:#dbe4f5;
  --muted:#8d99b5;
  --faint:#5b6781;
  --text-strong:#eef2ff;
  --label:#cdd6ea;
  --meta-em:#b9c5db;

  --accent:#6ee7f7;          /* 唯一のアクセントカラー */
  --accent-rgb:110,231,247;
  --link:#6ee7f7;
  --link-hover:#aef4ff;
  --sel-fg:#ffffff;

  --card:rgba(11,14,29,.86);
  --card-hover:rgba(14,18,36,.9);
  --card-border:rgba(255,255,255,.12);
  --card-border-hover:rgba(var(--accent-rgb),.4);
  --term-bg:rgba(9,11,26,.88);
  --opt-bg:#0b0e22;

  --line:rgba(255,255,255,.07);
  --line-strong:rgba(255,255,255,.12);
  --bump:rgba(255,255,255,.04);
  --hover-bg:rgba(255,255,255,.05);

  --shadow-card:0 8px 30px rgba(0,0,0,.35);
  --shadow-term:0 12px 40px rgba(0,0,0,.4);

  --page-bg:
    radial-gradient(1000px 600px at 75% -10%, rgba(255,255,255,.045), transparent 60%),
    linear-gradient(180deg,#05060f,#070918 45%,#05060f);

  --radius:8px;
  --mono:'JetBrains Mono','M PLUS 1 Code',ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;

  color-scheme:dark;
  font-size:16px;
}

/* ---- ライトテーマ ---- */
html.light{
  --bg-deep:#e9edf4;
  --bg:#f4f6fa;
  --fg:#2a3550;
  --muted:#5d6a85;
  --faint:#8a94ab;
  --text-strong:#121d36;
  --label:#3d4c6b;
  --meta-em:#4d5d7a;

  --accent:#0b7490;
  --accent-rgb:11,116,144;
  --link:#0b7490;
  --link-hover:#085c73;
  --sel-fg:#08222e;

  --card:rgba(255,255,255,.86);
  --card-hover:rgba(255,255,255,.97);
  --card-border:rgba(15,25,50,.14);
  --term-bg:rgba(255,255,255,.92);
  --opt-bg:#ffffff;

  --line:rgba(15,25,50,.1);
  --line-strong:rgba(15,25,50,.16);
  --bump:rgba(15,25,50,.05);
  --hover-bg:rgba(15,25,50,.06);

  --shadow-card:0 8px 30px rgba(35,50,90,.12);
  --shadow-term:0 12px 40px rgba(35,50,90,.14);

  --page-bg:
    radial-gradient(1000px 600px at 75% -10%, rgba(20,50,110,.05), transparent 60%),
    linear-gradient(180deg,#e8ecf3,#f6f8fb 45%,#e8ecf3);

  color-scheme:light;
}

/* --------------------------------------------------------------------------
   言語切替（デフォルト EN。html.lang-ja で日本語表示）
   -------------------------------------------------------------------------- */
html.lang-ja [lang="en"]{display:none !important}
html:not(.lang-ja) [lang="ja"]{display:none !important}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
*{box-sizing:border-box}
html{
  background:var(--bg-deep);
  scroll-behavior:smooth;
  scrollbar-color:var(--line-strong) transparent;
  scrollbar-width:thin;
}
html,body{height:100%;max-width:100%;overflow-x:hidden}
body{
  margin:0;
  font-family:var(--mono);
  background:var(--page-bg);
  color:var(--fg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

::selection{background:rgba(var(--accent-rgb),.28);color:var(--sel-fg)}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  background:var(--line-strong);
  border-radius:8px;
  border:2px solid var(--bg-deep);
}

:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

img,iframe,embed,object{max-width:100%;height:auto}

/* 長い語・URL は折り返してレイアウトを崩さない */
.content,.cv-box,.publication-item{
  width:100%;max-width:100%;
  hyphens:auto;-webkit-hyphens:auto;
  word-break:break-word;overflow-wrap:anywhere;
}
.cv-period a,.cv-role a,.publication-item a,.pub-links a{
  word-break:break-word;overflow-wrap:anywhere;
}

[hidden]{display:none !important}

/* --------------------------------------------------------------------------
   Fluid background（JS が .cosmos を body 直下に注入する）
   レイヤー順: 煙シェーダ → 粒状ノイズ
   -------------------------------------------------------------------------- */
.cosmos{
  position:fixed;inset:0;
  z-index:-1;
  overflow:hidden;
  pointer-events:none;
}

/* 流れる液体（WebGL 描画）。低解像度で描いて少しぼかし、滑らかさを出す */
.fluid{
  position:absolute;inset:0;
  width:100%;height:100%;
}

/* WebGL が使えない環境のフォールバック */
.fluid-fallback{
  background:
    radial-gradient(60% 60% at 25% 25%, rgba(76,128,189,.30), rgba(76,128,189,0) 70%),
    radial-gradient(60% 60% at 80% 70%, rgba(30,58,107,.40), rgba(30,58,107,0) 70%),
    linear-gradient(160deg, #06070f, #0b132b 60%, #0a1020);
  filter:none;
}
html.light .fluid-fallback{
  background:
    radial-gradient(60% 60% at 25% 25%, rgba(185,204,230,.55), rgba(185,204,230,0) 70%),
    radial-gradient(60% 60% at 80% 70%, rgba(221,230,242,.6), rgba(221,230,242,0) 70%),
    linear-gradient(160deg, #eef3fa, #dde6f2 60%, #e9edf4);
}

/* タップ／スライドで立ちのぼる白い煙（JS 描画）
   ダーク: screen 合成で発光する煙 / ライト: 通常合成で薄い煙 */
.inkfield{
  position:fixed;inset:0;width:100%;height:100%;
  z-index:5;
  pointer-events:none;
  filter:blur(12px);
  mix-blend-mode:screen;
  opacity:1;
}
html.light .inkfield{mix-blend-mode:normal;opacity:.5}

/* 煙の質感を出す微細な粒状ノイズ */
.grain{
  position:absolute;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity:.045;
  mix-blend-mode:overlay;
}
html.light .grain{opacity:.06}

/* --------------------------------------------------------------------------
   言語・テーマ切替ドック（JS が body 直下に注入する）
   -------------------------------------------------------------------------- */
.ctrl-dock{
  position:fixed;top:16px;right:16px;z-index:30;
  display:flex;gap:8px;align-items:stretch;
}
.lang-switch{
  display:flex;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:8px;
  overflow:hidden;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.lang-btn{
  font-family:var(--mono);
  font-size:.72rem;font-weight:600;letter-spacing:.06em;
  padding:0 10px;height:30px;
  background:transparent;border:0;
  color:var(--muted);
  cursor:pointer;
  transition:color .2s ease,background .2s ease;
}
.lang-btn + .lang-btn{border-left:1px solid var(--card-border)}
.lang-btn:hover{color:var(--accent)}
.lang-btn[aria-pressed="true"]{
  color:var(--accent);
  background:rgba(var(--accent-rgb),.1);
}
.theme-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:8px;
  color:var(--muted);
  cursor:pointer;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:color .2s ease,border-color .2s ease;
}
.theme-btn:hover{color:var(--accent);border-color:var(--card-border-hover)}
.theme-btn svg{width:15px;height:15px;display:block}
.theme-btn .icon-sun{display:none}
html.light .theme-btn .icon-sun{display:block}
html.light .theme-btn .icon-moon{display:none}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.site{
  min-height:100vh;
  display:grid;
  grid-template-columns:264px minmax(0,1fr);
  gap:32px;
  max-width:1140px;
  margin:0 auto;
  padding:44px 32px 64px;
}

.content{max-width:100%}
.content > * + *{margin-top:34px}

/* --------------------------------------------------------------------------
   Sidebar
   -------------------------------------------------------------------------- */
.sidebar{
  position:sticky;top:36px;
  align-self:start;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:12px;
  padding:28px 20px 20px;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  box-shadow:var(--shadow-card);
}

.profile{display:flex;flex-direction:column;align-items:center;gap:14px;width:100%}
.profile-meta{min-width:0;width:100%;text-align:center}

.avatar-ring{
  padding:3px;
  border-radius:50%;
  background:var(--line-strong);
}
.avatar{
  display:block;
  width:104px;height:104px;
  border-radius:50%;
  border:3px solid var(--bg-deep);
  object-fit:cover;
}

.name{
  margin:0;
  font-size:1.28rem;font-weight:700;letter-spacing:.01em;
  white-space:normal;
  color:var(--text-strong);
}

.social-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.social-row a{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:8px;
  color:var(--muted);
  background:var(--bump);
  border:1px solid var(--line-strong);
  transition:color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.social-row a svg{width:18px;height:18px;display:block;fill:currentColor}
.social-row a:hover{
  color:var(--accent);
  border-color:rgba(var(--accent-rgb),.45);
  box-shadow:0 0 16px rgba(var(--accent-rgb),.2);
}

.nav{
  display:flex;flex-direction:column;width:100%;gap:4px;
  margin-top:14px;padding-top:16px;
  border-top:1px solid var(--line-strong);
}
.nav a{
  font-size:.9rem;font-weight:500;
  color:var(--muted);text-decoration:none;
  padding:8px 12px;border-radius:6px;
  border:1px solid transparent;
  transition:color .22s ease,background .22s ease,border-color .22s ease;
}
.nav a::before{content:'❯ ';color:var(--accent);opacity:.45;transition:opacity .22s ease}
.nav a:hover{color:var(--text-strong);background:var(--hover-bg);border-color:var(--line-strong)}
.nav a:hover::before{opacity:1}
.nav a[aria-current="page"]{
  color:var(--accent);
  background:rgba(var(--accent-rgb),.08);
  border-color:rgba(var(--accent-rgb),.3);
}
.nav a[aria-current="page"]::before{opacity:1}

/* --------------------------------------------------------------------------
   Content generic
   セクション見出し＝大文字トラッキングの小ラベル（構造を示す）
   -------------------------------------------------------------------------- */
.content h4{
  display:flex;align-items:center;gap:10px;
  margin:40px 0 14px;
  font-size:.82rem;font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--label);
}
.content h4::before{
  content:'##';
  flex:none;
  white-space:nowrap;
  letter-spacing:0;
  color:var(--accent);
  text-shadow:0 0 12px rgba(var(--accent-rgb),.5);
}
.content h4::after{
  content:'';
  flex:1;height:1px;
  background:var(--line-strong);
}
.content section > h4:first-child{margin-top:0}

.content a{
  color:var(--link);
  text-decoration:underline dotted;
  text-underline-offset:3px;
  transition:color .2s ease,text-shadow .2s ease;
}
.content a:hover{color:var(--link-hover);text-shadow:0 0 14px rgba(var(--accent-rgb),.6)}

/* --------------------------------------------------------------------------
   Terminal（About Me のタイプライター演出）
   -------------------------------------------------------------------------- */
.terminal{
  background:var(--term-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  overflow:hidden;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  box-shadow:var(--shadow-term);
}
.terminal.is-typing{cursor:pointer}

.terminal-bar{
  display:flex;align-items:center;gap:8px;
  padding:10px 14px;
  background:var(--bump);
  border-bottom:1px solid var(--line);
}
.t-dot{width:11px;height:11px;border-radius:50%;flex:none;background:var(--line-strong)}
.terminal-title{
  margin-left:10px;
  color:var(--faint);
  font-size:.76rem;letter-spacing:.05em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

.terminal-body{
  padding:18px 22px 22px;
  font-size:.92rem;
  line-height:1.9;
}

.term-line{margin:0 0 12px}
.t-prompt{color:var(--accent);font-weight:600}
.t-cmd{color:var(--text-strong)}

/* JS 有効時はタイプ開始までソーステキストを隠す（FOUC 防止） */
.js .type-target:not(.typing):not(.typed){visibility:hidden}

.terminal-body h4{
  display:block;
  margin:0 0 10px;
  font-size:1.1rem;font-weight:700;
  letter-spacing:.02em;
  text-transform:none;
  color:var(--text-strong);
}
.terminal-body h4::before{
  content:'# ';
  color:var(--accent);
  text-shadow:0 0 12px rgba(var(--accent-rgb),.4);
}
.terminal-body h4::after{content:none}
.terminal-body p{margin:0 0 10px;color:var(--fg)}
.terminal-body p:last-child{margin-bottom:0}

.t-cursor{
  display:inline-block;
  width:.58em;height:1.15em;
  margin-left:2px;
  vertical-align:-.18em;
  background:var(--accent);
  box-shadow:0 0 10px rgba(var(--accent-rgb),.8);
  animation:cursor-blink 1.1s step-end infinite;
}
.t-cursor.busy{animation:none;opacity:1}
@keyframes cursor-blink{0%,55%{opacity:1}56%,100%{opacity:0}}

/* --------------------------------------------------------------------------
   News（日付が縦に揃うログ形式）
   -------------------------------------------------------------------------- */
.news{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:18px 22px 10px;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.news h4{margin-top:0}

.news ul{list-style:none;margin:0;padding:0}
.news li{
  display:grid;
  grid-template-columns:10ch 1fr;
  gap:0 10px;
  margin:0;padding:9px 0;
  font-size:.86rem;line-height:1.75;
  color:var(--fg);
  border-top:1px solid var(--line);
}
.news li:first-child{border-top:0}
/* li は en→ja の順で対になっている前提。JA 表示時は2番目の li が先頭になる */
html.lang-ja .news li[lang="ja"]:nth-child(2){border-top:0}
.news-date{color:var(--accent);font-weight:600}

/* 6件目以降の折りたたみ（展開時は順番にポップイン。delay は JS が設定） */
.news ul:not(.news-open) li.news-extra{display:none !important}
@keyframes pop-in{
  from{opacity:0;transform:translateY(8px)}
  to{opacity:1;transform:none}
}
.news ul.news-open li.news-extra{animation:pop-in .38s cubic-bezier(.2,.7,.3,1) both}
.news-toggle{
  display:block;width:100%;
  margin:0;padding:10px 0 12px;
  background:transparent;border:0;
  border-top:1px solid var(--line);
  font-family:var(--mono);font-size:.8rem;letter-spacing:.04em;
  color:var(--muted);text-align:left;cursor:pointer;
  transition:color .2s ease;
}
.news-toggle::before{content:'\276f ';color:var(--accent);opacity:.6}
.news-toggle:hover{color:var(--accent)}

/* --------------------------------------------------------------------------
   Publications
   -------------------------------------------------------------------------- */
.publications{margin-top:0}
.pub-grid{
  display:grid;grid-template-columns:1fr;gap:14px;margin-bottom:8px;
  counter-reset:pub;
}

.publication-item{
  position:relative;
  counter-increment:pub;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:16px 18px;
  overflow:hidden;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:border-color .25s ease,background .25s ease,transform .25s ease,box-shadow .25s ease;
}
.publication-item::before{
  content:'';
  position:absolute;left:0;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,rgba(var(--accent-rgb),.8),rgba(var(--accent-rgb),.25),transparent);
  opacity:.45;
  transition:opacity .25s ease;
}
.publication-item::after{
  content:'[' counter(pub,decimal-leading-zero) ']';
  position:absolute;top:13px;right:14px;
  font-size:.72rem;letter-spacing:.05em;
  color:var(--faint);
}
.publication-item:hover{
  border-color:var(--card-border-hover);
  background:var(--card-hover);
  transform:translateY(-2px);
  box-shadow:0 10px 28px rgba(0,0,0,.25);
}
.publication-item:hover::before{opacity:1}

.pub-title{
  margin:0 0 10px;padding-right:48px;
  font-size:.96rem;font-weight:600;line-height:1.6;
  color:var(--text-strong);
}
.pub-meta{margin:0 0 6px;color:var(--muted);font-size:.79rem;line-height:1.65}
.pub-meta em{font-style:normal;color:var(--meta-em)}
/* 掲載先（venue）行のアクセントバー。言語切替で重複するため em を含む行にも適用 */
.publication-item .pub-meta:first-of-type,
.publication-item .pub-meta:has(em){
  border-left:2px solid rgba(var(--accent-rgb),.4);
  padding-left:10px;
  margin-bottom:8px;
}
.publication-item > p{margin:8px 0 0}

.pub-links{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:10px 0 0;padding:0}
.pub-link,
.content a.pub-link{
  display:inline-block;
  padding:2px 8px;
  border:1px solid rgba(var(--accent-rgb),.25);
  border-radius:4px;
  background:rgba(var(--accent-rgb),.06);
  color:var(--accent);
  font-size:.74rem;
  text-decoration:none;
  white-space:nowrap;
  transition:background .25s ease,border-color .25s ease;
}
.pub-link:hover,
.content a.pub-link:hover{
  background:rgba(var(--accent-rgb),.14);
  border-color:rgba(var(--accent-rgb),.5);
  text-shadow:none;
}

/* 年フィルタ */
.pub-controls{display:flex;gap:10px;align-items:center;margin:0 0 18px}
.pub-controls select{
  font-family:var(--mono);
  background:var(--card);
  color:var(--fg);
  border:1px solid var(--card-border);
  border-radius:6px;
  padding:7px 12px;
  font-size:.84rem;
  cursor:pointer;
}
.pub-controls select option{background:var(--opt-bg);color:var(--fg)}

/* --------------------------------------------------------------------------
   CV
   -------------------------------------------------------------------------- */
.cv-box{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:4px 20px;
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.cv-item{
  padding:14px 12px;
  margin:0 -12px;
  border-top:1px solid var(--line);
  border-radius:6px;
  transition:background .25s ease;
}
.cv-item:first-child{border-top:0}
.cv-item:hover{background:var(--hover-bg)}
.cv-period{margin:0 0 4px;color:var(--text-strong);font-weight:600;font-size:.88rem;line-height:1.7}
.cv-role{margin:0;color:var(--muted);font-size:.82rem;line-height:1.75}
.cv-item > p{margin:0 0 4px}
.cv-item > p:last-child{margin-bottom:0}

/* --------------------------------------------------------------------------
   Reveal on scroll（出入りのたびに再生。--rv-y はスクロール方向で JS が設定）
   -------------------------------------------------------------------------- */
.reveal{
  opacity:0;
  transform:translateY(var(--rv-y,12px));
  transition:opacity .55s cubic-bezier(.2,.7,.3,1),transform .55s cubic-bezier(.2,.7,.3,1);
}
.reveal.is-visible{opacity:1;transform:none}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width:960px){
  .site{grid-template-columns:1fr;gap:24px;padding:56px 18px 48px}
  .sidebar{position:relative;top:0;padding:22px 16px 14px}
  .avatar{width:84px;height:84px}
  .nav{flex-direction:row;justify-content:center;flex-wrap:wrap;margin-top:10px;padding-top:14px}
  .nav a{padding:7px 12px;font-size:.86rem}
}

@media (max-width:520px){
  :root{font-size:15px}
  .site{padding:54px 12px 40px}
  .ctrl-dock{top:12px;right:12px}
  .terminal-body{padding:14px 14px 18px;font-size:.88rem}
  .news{padding:14px 14px 8px}
  .news li{grid-template-columns:1fr;gap:0}
  .publication-item{padding:14px 14px}
  .cv-box{padding:2px 14px}
  .fluid{filter:none}
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .t-cursor{animation:none;opacity:1}
  .reveal,.reveal.is-visible{transition:none !important;transform:none !important;opacity:1 !important}
  .news ul.news-open li.news-extra{animation:none !important}
  .publication-item,.social-row a,.nav a,.cv-item{transition:none}
  .publication-item:hover{transform:none}
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

/* Safari / iOS のデータ自動検出リンク（日付・電話番号等）を無効化 */
a[href^="x-apple-data-detectors"],
a[x-apple-data-detectors]{
  color:inherit !important;
  text-decoration:none !important;
  pointer-events:none !important;
  cursor:default !important;
}
.no-detect{color:inherit;text-decoration:none;pointer-events:none;cursor:default}