/* ODAF 2026 Topics — AIx{} Project
   Tone: 白基調・細い罫線・余白多め・等幅フォントのアクセント */

:root {
  --ink: #0d0f12;
  --ink-2: #3d4650;
  --muted: #6b7480;
  --line: #e6e8ec;
  --line-2: #f0f2f5;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --accent: #1f4bff;
  --accent-ink: #14309e;
  --accent-soft: #eef2ff;
  --warn: #b45309;
  --ok: #157347;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(13, 15, 18, .04), 0 8px 24px rgba(13, 15, 18, .06);
  --maxw: 1120px;
  --mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 15px;
  letter-spacing: .01em;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 16px;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 9px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand img { width: 22px; height: 22px; display: block; }
.brand .mark { font-family: var(--mono); font-weight: 600; font-size: 15px; letter-spacing: -.01em; }
.brand .sep { color: var(--line); }
.brand .site { font-size: 13px; color: var(--muted); white-space: nowrap; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--ink-2); font-size: 13.5px; padding: 7px 11px;
  border-radius: 999px;
}
.nav a:hover { background: var(--bg-soft); text-decoration: none; }
.nav a.active { color: var(--accent); background: var(--accent-soft); }
.nav .cta {
  background: var(--ink); color: #fff; padding: 8px 15px; border-radius: 999px;
}
.nav .cta:hover { background: var(--accent); text-decoration: none; }
.lang-btn {
  font-family: var(--mono); font-size: 12px; border: 1px solid var(--line);
  background: #fff; color: var(--ink-2); border-radius: 999px;
  padding: 5px 10px; cursor: pointer;
}
.lang-btn:hover { border-color: var(--ink); }

/* ---------- hero ---------- */
.hero { border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.hero .wrap { padding-top: 44px; padding-bottom: 40px; }
.kicker {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 10px;
}
h1 { font-size: 30px; line-height: 1.35; margin: 0 0 12px; letter-spacing: -.02em; font-weight: 700; }
.lede { color: var(--ink-2); margin: 0; max-width: 60ch; }
.meta-row {
  display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 18px;
  font-size: 13px; color: var(--muted);
}
.meta-row b { color: var(--ink-2); font-weight: 600; }

/* ---------- search ---------- */
.searchbar { padding: 22px 0 6px; }
.search-input-row { display: flex; gap: 10px; }
.search-input {
  flex: 1; font: inherit; padding: 12px 16px;
  border: 1px solid var(--line); border-radius: 999px; outline: none;
  background: #fff;
}
.search-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; align-items: center; }
select.filter, .chip {
  font: inherit; font-size: 13px; padding: 7px 12px;
  border: 1px solid var(--line); border-radius: 999px; background: #fff;
  color: var(--ink-2); cursor: pointer;
}
select.filter:focus { outline: none; border-color: var(--accent); }
.chip:hover { border-color: var(--ink); }
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip.ghost { border-style: dashed; }

.result-count { font-size: 13px; color: var(--muted); margin: 18px 0 10px; }
.result-count b { color: var(--ink); }

/* ---------- cards ---------- */
.grid {
  display: grid; gap: 14px; padding-bottom: 56px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; padding: 18px; position: relative;
  display: flex; flex-direction: column; gap: 10px;
  transition: box-shadow .15s ease, border-color .15s ease, transform .15s ease;
}
.card:hover { box-shadow: var(--shadow); border-color: #d7dbe2; transform: translateY(-1px); }
.card .booth {
  font-family: var(--mono); font-size: 11px; color: var(--accent-ink);
  background: var(--accent-soft); border-radius: 6px; padding: 2px 7px;
  display: inline-block;
}
.card h3 { font-size: 16px; line-height: 1.5; margin: 0; letter-spacing: -.01em; }
.card h3 a { color: var(--ink); }
.card .who { font-size: 12.5px; color: var(--muted); }
.card .excerpt {
  font-size: 13px; color: var(--ink-2); margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.kw-row { display: flex; flex-wrap: wrap; gap: 6px; }
.kw {
  font-family: var(--mono); font-size: 11px; color: var(--ink-2);
  border: 1px solid var(--line); border-radius: 6px; padding: 2px 7px;
  background: var(--bg-soft); cursor: pointer;
}
.kw:hover { border-color: var(--accent); color: var(--accent); }
.kw .x { color: var(--muted); }

.fav-btn {
  position: absolute; top: 12px; right: 12px;
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  width: 32px; height: 32px; cursor: pointer; font-size: 14px; line-height: 1;
  color: var(--muted); display: grid; place-items: center; padding: 0;
}
.fav-btn:hover { border-color: var(--accent); color: var(--accent); }
.fav-btn.on { background: var(--accent); border-color: var(--accent); color: #fff; }

.empty {
  border: 1px dashed var(--line); border-radius: var(--radius);
  padding: 48px 24px; text-align: center; color: var(--muted); font-size: 14px;
}

/* ---------- detail ---------- */
.detail { padding: 34px 0 64px; }
.back { font-size: 13px; color: var(--muted); }
.detail h1 { margin-top: 14px; }
.detail .who { color: var(--ink-2); font-size: 14px; }
.detail .abstract { white-space: pre-wrap; margin: 22px 0; color: var(--ink-2); }
.panel {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; background: var(--bg-soft); margin: 18px 0;
}
.panel h2 { font-size: 13px; margin: 0 0 10px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 600; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 6px 14px; font-size: 14px; }
.kv dt { color: var(--muted); font-size: 13px; }
.kv dd { margin: 0; }
.shots { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin: 18px 0; }
.shots img { width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--line); display: block; }
.map-img { width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--line); display: block; margin-top: 10px; }

/* ---------- buttons / forms ---------- */
.btn {
  font: inherit; font-size: 14px; border-radius: 999px; padding: 10px 20px;
  border: 1px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn:hover { background: var(--accent); border-color: var(--accent); text-decoration: none; }
.btn.ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--ink); background: #fff; color: var(--ink); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

label.field { display: block; margin: 20px 0 0; }
label.field > .lab { font-size: 13.5px; font-weight: 600; display: block; margin-bottom: 6px; }
label.field .req { color: #c02626; font-weight: 400; }
label.field .hint { font-weight: 400; color: var(--muted); font-size: 12px; display: block; margin-top: 2px; }
input[type=text], input[type=email], input[type=url], textarea, select {
  width: 100%; font: inherit; font-size: 14px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; color: var(--ink);
}
textarea { min-height: 160px; resize: vertical; line-height: 1.7; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.pub-toggle { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.counter { font-family: var(--mono); font-size: 11.5px; color: var(--muted); float: right; }
.counter.over { color: #c02626; }
.checks { display: grid; gap: 8px; margin-top: 8px; }
.checks label { display: flex; gap: 8px; align-items: flex-start; font-size: 13.5px; }
.err { color: #c02626; font-size: 12.5px; margin-top: 6px; }
.note { font-size: 12.5px; color: var(--muted); }

.savebar {
  position: sticky; bottom: 0; background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px); border-top: 1px solid var(--line);
  padding: 12px 0; margin-top: 32px; z-index: 20;
}
.savebar .wrap { display: flex; align-items: center; gap: 12px; }
.save-state { font-size: 12.5px; color: var(--muted); font-family: var(--mono); }
.save-state.ok { color: var(--ok); }
.save-state.err { color: #c02626; }

/* ---------- modal ---------- */
.modal-bg {
  position: fixed; inset: 0; background: rgba(13,15,18,.42); z-index: 60;
  display: grid; place-items: center; padding: 20px;
}
.modal {
  background: #fff; border-radius: 16px; max-width: 520px; width: 100%;
  padding: 26px; box-shadow: var(--shadow); max-height: 88vh; overflow: auto;
}
.modal h2 { margin: 0 0 6px; font-size: 18px; }
[hidden] { display: none !important; }

/* ---------- plan ---------- */
.plan-group { margin-bottom: 30px; }
.plan-group h2 {
  font-size: 14px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted); border-bottom: 1px solid var(--line); padding-bottom: 8px;
}
.plan-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid var(--line-2);
}
.plan-item .booth { flex: none; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); background: var(--bg-soft);
  padding: 34px 0 44px; margin-top: 40px;
}
.site-footer .cols { display: flex; flex-wrap: wrap; gap: 26px 40px; }
.site-footer a { color: var(--ink-2); font-size: 13px; }
.site-footer a:hover { color: var(--accent); }
.foot-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.foot-brand img { width: 20px; height: 20px; }
.foot-brand .mark { font-family: var(--mono); font-size: 13.5px; }
.foot-note { font-size: 12px; color: var(--muted); margin-top: 22px; }
.foot-links { display: flex; flex-direction: column; gap: 6px; }

/* ---------- AI chat ---------- */
.ai-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 50;
  width: 54px; height: 54px; border-radius: 50%; border: none; cursor: pointer;
  background: linear-gradient(135deg, #4285f4, #9b72cb 55%, #d96570);
  box-shadow: 0 6px 20px rgba(31, 75, 255, .3);
  display: grid; place-items: center; color: #fff;
}
.ai-fab:hover { transform: translateY(-1px); }
.ai-fab svg { width: 24px; height: 24px; }
.ai-panel {
  position: fixed; right: 20px; bottom: 84px; z-index: 51;
  width: min(400px, calc(100vw - 32px)); height: min(560px, calc(100vh - 130px));
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 18px 50px rgba(13,15,18,.18);
  display: flex; flex-direction: column; overflow: hidden;
}
.ai-head {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px;
  border-bottom: 1px solid var(--line); font-size: 13.5px; font-weight: 600;
}
.ai-head .dot {
  width: 18px; height: 18px; border-radius: 50%;
  background: linear-gradient(135deg, #4285f4, #9b72cb 55%, #d96570);
}
.ai-head button {
  margin-left: auto; border: none; background: none; cursor: pointer;
  font-size: 18px; color: var(--muted); line-height: 1;
}
.ai-log { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.ai-msg { font-size: 13.5px; line-height: 1.75; max-width: 92%; }
.ai-msg.user {
  align-self: flex-end; background: var(--accent); color: #fff;
  padding: 9px 13px; border-radius: 14px 14px 4px 14px; white-space: pre-wrap;
}
.ai-msg.bot {
  align-self: flex-start; background: var(--bg-soft); color: var(--ink);
  padding: 9px 13px; border-radius: 14px 14px 14px 4px; border: 1px solid var(--line-2);
}
.ai-msg.bot a { word-break: break-all; }
.ai-suggest { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 14px 10px; }
.ai-suggest button {
  font: inherit; font-size: 12px; border: 1px solid var(--line); background: #fff;
  border-radius: 999px; padding: 5px 10px; cursor: pointer; color: var(--ink-2);
}
.ai-suggest button:hover { border-color: var(--accent); color: var(--accent); }
.ai-form { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--line); }
.ai-form textarea {
  flex: 1; min-height: 40px; max-height: 110px; font-size: 13.5px;
  padding: 9px 12px; border-radius: 12px; resize: none;
}
.ai-form button {
  border: none; background: var(--ink); color: #fff; border-radius: 50%;
  width: 38px; height: 38px; flex: none; cursor: pointer; font-size: 15px;
}
.ai-form button:disabled { opacity: .4; }
.ai-disclaimer { font-size: 10.5px; color: var(--muted); padding: 0 14px 10px; text-align: center; }

/* ---------- legal ---------- */
.legal { padding: 40px 0 70px; }
.legal h2 { font-size: 17px; margin: 34px 0 8px; }
.legal h3 { font-size: 14.5px; margin: 20px 0 4px; }
.legal p, .legal li { font-size: 14px; color: var(--ink-2); }
.legal ul { padding-left: 1.2em; }

@media (max-width: 640px) {
  h1 { font-size: 24px; }
  .brand .site { display: none; }
  .nav a { padding: 6px 8px; font-size: 13px; }
  .kv { grid-template-columns: 1fr; }
  .hero .wrap { padding-top: 30px; padding-bottom: 28px; }
}


/* ---------- avatar ---------- */
.avatar {
  width: 30px; height: 30px; border-radius: 50%; object-fit: cover;
  border: 1px solid var(--line); background: var(--bg-soft); flex: none; display: block;
}
.avatar-lg { width: 52px; height: 52px; }
.avatar-sm { width: 24px; height: 24px; }
.who-row { display: flex; align-items: center; gap: 9px; }
.who-row .who { margin: 0; }

/* カード全体をクリック可能に */
.card[data-href] { cursor: pointer; }

/* ---------- publish switch ---------- */
.switch { display: inline-flex; align-items: center; gap: 9px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch .track {
  width: 40px; height: 23px; border-radius: 999px; background: #cfd4dc;
  position: relative; transition: background .15s ease; flex: none;
}
.switch .track::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 19px; height: 19px; border-radius: 50%; background: #fff;
  box-shadow: 0 1px 3px rgba(13,15,18,.25); transition: transform .15s ease;
}
.switch input:checked + .track { background: var(--ok); }
.switch input:checked + .track::after { transform: translateX(17px); }
.switch input:focus-visible + .track { box-shadow: 0 0 0 3px var(--accent-soft); }
.switch .label { font-size: 13px; color: var(--ink-2); white-space: nowrap; }

/* 顔写真アップロード */
.photo-row { display: flex; align-items: center; gap: 14px; margin-top: 8px; }
.photo-row .avatar { width: 64px; height: 64px; }
.photo-empty {
  width: 64px; height: 64px; border-radius: 50%; border: 1px dashed var(--line);
  display: grid; place-items: center; color: var(--muted); font-size: 11px; flex: none;
}