/* =========================
   blog/assets/css/styles.css
   Notebook UI + Light/Dark
========================= */
:root{
  --bg: #f4f6fb;
  --paper: #ffffff;
  --paper2: rgba(255,255,255,.84);

  --text: #0f172a;
  --muted: #64748b;
  --border: rgba(148,163,184,.35);

  --ink: rgba(15,23,42,.08);
  --line: rgba(59,130,246,.10); /* 罫線 */
  --ring: rgba(15,23,42,.10);

  --accent: #38bdf8;
  --accent2: #a78bfa;

  --shadow: 0 18px 50px rgba(15,23,42,.10);
  --radius: 16px;

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
}

:root[data-theme="dark"]{
  --bg: #0b1220;
  --paper: rgba(17,24,39,.72);
  --paper2: rgba(17,24,39,.60);

  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: rgba(148,163,184,.22);

  --ink: rgba(255,255,255,.06);
  --line: rgba(56,189,248,.12);
  --ring: rgba(255,255,255,.08);

  --shadow: 0 18px 60px rgba(0,0,0,.35);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(900px 500px at 12% 0%, rgba(56,189,248,.18), transparent 55%),
    radial-gradient(900px 500px at 90% 10%, rgba(167,139,250,.14), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.0), rgba(0,0,0,.02)),
    var(--bg);
}

/* Topbar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(255,255,255,.72), rgba(255,255,255,.35));
  border-bottom: 1px solid var(--border);
}
:root[data-theme="dark"] .topbar{
  background: linear-gradient(180deg, rgba(11,18,32,.70), rgba(11,18,32,.35));
}

.topbar__inner{
  max-width: 1180px;
  margin: 0 auto;
  padding: .8rem 1rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 1rem;
}

.brand{
  display:flex;
  align-items:center;
  gap:.65rem;
  text-decoration:none;
  color: var(--text);
}
.brand__logo{
  font-size: 1.25rem;
  filter: drop-shadow(0 8px 18px rgba(0,0,0,.15));
}
.brand__text{
  font-weight: 800;
  letter-spacing: .2px;
}

/* Mode button */
.modeBtn{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding: .55rem .8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--paper2);
  color: var(--text);
  cursor:pointer;
  box-shadow: 0 10px 26px rgba(15,23,42,.10);
}
.modeBtn:hover{ transform: translateY(-1px); }
.modeBtn:active{ transform: translateY(0); }
.modeBtn__icon{ font-size: 1rem; }
.modeBtn__label{ font-family: var(--mono); font-size: .85rem; opacity: .85; }

/* Layout */
.wrap{
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.2rem 1rem 2.2rem;
  display:grid;
  grid-template-columns: 320px 1fr;
  gap: 1.1rem;
}
@media (max-width: 980px){
  .wrap{ grid-template-columns: 1fr; }
  .sidebar{ order: 2; }
}

.card{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.card--note{
  position: relative;
  overflow:hidden;
  background: var(--paper);
}
.card--note::before{
  /* 左のリング穴っぽい点列 */
  content:"";
  position:absolute;
  left: 14px;
  top: 18px;
  bottom: 18px;
  width: 16px;
  background:
    radial-gradient(circle at 8px 10px, var(--ring) 0 3px, transparent 4px) 0 0/16px 18px;
  opacity: .9;
  pointer-events:none;
}
.card--note::after{
  /* ノートの罫線 */
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(transparent 0 34px, var(--line) 35px, transparent 36px) 0 0/100% 36px;
  opacity: .9;
  pointer-events:none;
}

.card--paper{
  position: relative;
  overflow:hidden;
  background: var(--paper);
}
.card--paper::after{
  /* 薄い罫線を本文側にも */
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(transparent 0 40px, var(--line) 41px, transparent 42px) 0 0/100% 42px;
  opacity: .55;
  pointer-events:none;
}

.card__title{
  position:relative;
  padding: 1rem 1rem .7rem 3rem;
  font-weight: 900;
  letter-spacing: .3px;
}
.divider{
  position: relative;
  height: 1px;
  background: var(--border);
  margin: .5rem 1rem;
}

/* Sidebar menus */
.menu{
  position: relative;
  padding: .35rem 1rem .8rem 3rem;
}
.menu__summary{
  cursor:pointer;
  font-weight: 800;
  opacity: .95;
  list-style: none;
}
.menu__summary::-webkit-details-marker{ display:none; }
.menu__summary::after{
  content: "▾";
  margin-left: .5rem;
  font-size: .9rem;
  opacity: .6;
}
details[open] .menu__summary::after{ content:"▴"; }

.menu__list{
  margin-top: .6rem;
  display:flex;
  flex-direction:column;
  gap: .35rem;
}
.menu__item{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding: .45rem .6rem;
  border-radius: 12px;
  text-decoration:none;
  color: var(--text);
  border: 1px solid transparent;
  background: rgba(255,255,255,.0);
  position:relative;
}
:root[data-theme="dark"] .menu__item{ background: rgba(0,0,0,.0); }
.menu__item:hover{
  border-color: var(--border);
  background: rgba(56,189,248,.08);
}
.menu__item.is-active{
  border-color: rgba(56,189,248,.40);
  background: rgba(56,189,248,.14);
}
.menu__dot{
  width:10px; height:10px; border-radius:999px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
  box-shadow: 0 8px 16px rgba(56,189,248,.25);
}

/* Chips */
.chips{
  position:relative;
  padding: .1rem 1rem .2rem 3rem;
  display:flex;
  flex-wrap:wrap;
  gap: .45rem;
}
.chip{
  display:inline-flex;
  align-items:center;
  padding:.38rem .65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--paper2);
  color: var(--text);
  text-decoration:none;
  font-size: .85rem;
}
.chip--active{
  border-color: rgba(56,189,248,.55);
  background: rgba(56,189,248,.18);
  font-weight: 800;
}
.chip--ghost{
  background: transparent;
  opacity: .9;
}

/* Sidebar meta */
.meta{
  position:relative;
  padding: .6rem 1rem 1rem 3rem;
  display:flex;
  flex-direction:column;
  gap:.4rem;
}
.meta__row{
  display:flex;
  justify-content:space-between;
  color: var(--muted);
  font-size: .92rem;
}
.meta__row b{ color: var(--text); }

/* Content */
.content{ min-width: 0; }

.headline{
  padding: 1.05rem 1.1rem;
  margin-bottom: 1rem;
  position:relative;
}
.headline__top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: .8rem;
  position:relative;
  z-index: 1;
}
.headline__title{
  margin:0;
  font-size: 1.55rem;
  letter-spacing: .2px;
}
.headline__sub{
  margin:.4rem 0 0;
  color: var(--muted);
  position:relative;
  z-index: 1;
}
.badge{
  display:inline-flex;
  padding:.35rem .6rem;
  border-radius:999px;
  border: 1px solid var(--border);
  background: rgba(167,139,250,.12);
  font-size: .85rem;
}

/* List / posts */
.list{
  display:flex;
  flex-direction:column;
  gap: .9rem;
}
.post{
  padding: 1.05rem 1.1rem;
  position:relative;
}
.post > *{ position:relative; z-index: 1; }
.post__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap: .5rem;
  color: var(--muted);
  font-size: .9rem;
}
.tag{
  display:inline-flex;
  padding: .28rem .55rem;
  border-radius: 999px;
  border: 1px solid rgba(56,189,248,.35);
  background: rgba(56,189,248,.12);
  color: var(--text);
  font-weight: 800;
}
.sep{ opacity:.6; }

.post__title{
  margin:.55rem 0 .25rem;
  font-size: 1.22rem;
}
.post__desc{
  margin:.15rem 0 0;
  color: var(--muted);
  line-height: 1.8;
}

/* detail */
.prose{
  margin-top: .8rem;
  padding-top: .8rem;
  border-top: 1px dashed rgba(148,163,184,.45);
  line-height: 1.9;
}
.prose code{
  font-family: var(--mono);
  padding: .12rem .3rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(15,23,42,.06);
}
:root[data-theme="dark"] .prose code{
  background: rgba(255,255,255,.06);
}
.prose pre{
  overflow:auto;
  padding: .9rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(15,23,42,.06);
}
:root[data-theme="dark"] .prose pre{
  background: rgba(0,0,0,.30);
}

/* =========================
   Post media (thumbnail)
========================= */
.post__media{
  margin-top: .85rem;
}
.imgBtn{
  width: 100%;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.imgBtn:hover{ transform: translateY(-1px); }
.imgBtn:active{ transform: translateY(0); }

.thumb{
  display:block;
  width: 100%;
  height: auto;
}

img.thumb{
  max-width: 500px;
  height: auto;
}
.imgBtn:hover .thumb{
  transform: scale(1.03);
}

.zoomHint{
  position:absolute;
  right: .65rem;
  bottom: .65rem;
  padding: .35rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.35);
  color: #fff;
  font-family: var(--mono);
  font-size: .8rem;
  backdrop-filter: blur(8px);
}

/* =========================
   Link button
========================= */
.post__actions{
  margin-top: .7rem;
  display:flex;
  gap:.6rem;
  flex-wrap:wrap;
}
.linkBtn{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding: .55rem .8rem;
  border-radius: 999px;
  border: 1px solid rgba(56,189,248,.35);
  background: rgba(56,189,248,.12);
  color: var(--text);
  text-decoration:none;
  font-weight: 800;
}
.linkBtn:hover{
  background: rgba(56,189,248,.18);
  transform: translateY(-1px);
}
.linkBtn:active{ transform: translateY(0); }
.linkBtn__icon{ opacity: .8; font-weight: 900; }

/* =========================
   Fullscreen image modal
========================= */
.imgModal{
  position: fixed;
  inset: 0;
  display: none;
  z-index: 999;
}
.imgModal.is-open{ display:block; }

.imgModal__backdrop{
  position:absolute;
  inset:0;
  background: rgba(0,0,0,.72);
}

.imgModal__panel{
  position: absolute;
  inset: 0;
  display:flex;
  flex-direction:column;
  padding: 1rem;
}

.imgModal__close{
  align-self:flex-end;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(0,0,0,.35);
  color: #fff;
  cursor:pointer;
  font-size: 1.1rem;
}

.imgModal__title{
  margin: .6rem auto .8rem;
  max-width: 1100px;
  width: 100%;
  color: #fff;
  font-weight: 900;
  letter-spacing: .2px;
  text-shadow: 0 10px 24px rgba(0,0,0,.45);
}

.imgModal__img{
  margin: 0 auto;
  max-width: 1100px;
  width: 100%;
  height: auto;
  max-height: calc(100vh - 140px);
  object-fit: contain;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 30px 80px rgba(0,0,0,.45);
  background: rgba(255,255,255,.06);
}


/* Empty */
.empty{
  padding: 1.2rem 1.1rem;
  text-align:center;
}
.empty__icon{ font-size: 1.6rem; }
.empty__text{ color: var(--muted); margin-top: .4rem; }

/* Footer */
.footer{
  margin: 1.2rem 0 .4rem;
  padding: .8rem .2rem;
  color: var(--muted);
}
.footer__inner{
  display:flex;
  justify-content:space-between;
  gap: 1rem;
  flex-wrap:wrap;
}
.footer__right{ opacity:.9; }