/* ===== hersona demo site — tech / monochrome (Geist-inspired) =====
 * near-black ground, hairline borders, mono labels, single white accent.
 * 外部ランタイム依存なし (GitHub Pages / オフラインでも崩れない)。
 */
:root {
  /* monochrome ramp */
  --bg: #0a0a0a;
  --bg-1: #0e0e0e;
  --bg-2: #131313;
  --panel: #0f0f0f;
  --panel-2: #161616;
  --line: rgba(255, 255, 255, 0.10);
  --line-2: rgba(255, 255, 255, 0.06);
  --line-strong: rgba(255, 255, 255, 0.22);
  --ink: #ededed;
  --ink-dim: #a1a1a1;
  --ink-mute: #6f6f6f;
  --ink-faint: #4d4d4d;
  --accent: #fafafa;        /* single accent = near-white */
  --on-accent: #0a0a0a;
  --warn: #e8b339;
  --danger: #e5484d;
  /* category greys (monochrome differentiation) */
  --cat-personality: #fafafa;
  --cat-speech: #b4b4b4;
  --cat-archetype: #7d7d7d;
  --cat-hobby: #545454;

  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1100px;
  --mono: "Geist Mono", ui-monospace, "SF Mono", "JetBrains Mono", monospace;
  --sans: "Geist", "Noto Sans JP", system-ui, sans-serif;
  --jp: "Noto Sans JP", "Geist", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  /* faint grid */
  background-image:
    linear-gradient(var(--line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 56px 56px;
  color: var(--ink);
  font-family: var(--jp);
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--ink); text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--ink-faint); }
h1, h2, h3, h4 { font-family: var(--sans); line-height: 1.2; letter-spacing: -0.02em; font-weight: 700; }
code, pre, .mono { font-family: var(--mono); }
::selection { background: #fff; color: #000; }

/* ---- language visibility ---- */
body[data-lang="ja"] .t-en, body[data-lang="ja"] [data-en]:not([data-ja]) { display: none; }
body[data-lang="en"] .t-ja { display: none; }
.t-ja, .t-en { display: block; }
body[data-lang="both"] .t-en { color: var(--ink-mute); font-size: .85em; font-weight: 400; letter-spacing: 0; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 20px;
  padding: 0 clamp(16px, 4vw, 40px); height: 60px;
  background: rgba(10, 10, 10, 0.72);
  backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  display: grid; place-items: center;
  width: 28px; height: 28px; border-radius: 7px;
  background: var(--accent); color: var(--on-accent);
  font-family: var(--jp); font-weight: 800; font-size: .95rem;
}
.brand-mark.small { width: 24px; height: 24px; font-size: .8rem; }
.brand-name { font-size: 1.05rem; letter-spacing: -0.02em; font-family: var(--sans); }
.nav { display: flex; gap: 4px; margin-left: auto; font-size: .9rem; }
.nav a { color: var(--ink-dim); padding: 6px 12px; border-radius: 6px; transition: color .15s, background .15s; }
.nav a:hover { color: var(--ink); background: var(--panel-2); }
.lang-toggle { display: flex; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.lang-toggle button {
  background: transparent; color: var(--ink-mute); border: 0;
  padding: 6px 11px; font-size: .78rem; cursor: pointer; transition: .15s; font-family: var(--mono);
}
.lang-toggle button:hover { color: var(--ink); }
.lang-toggle button.active { background: var(--accent); color: var(--on-accent); font-weight: 600; }
@media (max-width: 760px) { .nav { display: none; } }

/* ===== Hero ===== */
.hero { position: relative; padding: clamp(64px, 11vw, 128px) clamp(16px, 4vw, 40px) 64px; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-glow {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(255,255,255,.05), transparent 70%),
    radial-gradient(800px 300px at 50% -40%, rgba(255,255,255,.08), transparent 70%);
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent 80%);
          mask-image: linear-gradient(to bottom, #000, transparent 80%);
}
.hero-inner { max-width: 820px; margin: 0 auto; text-align: center; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .04em;
  color: var(--ink-dim); border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 14px; margin: 0 0 26px; background: var(--panel);
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px rgba(255,255,255,.6); }
.hero-title { font-size: clamp(2.2rem, 6.4vw, 4.2rem); font-weight: 800; margin: 0 0 20px; letter-spacing: -0.045em; }
.hero-title .t-en { font-size: .9em; color: var(--ink-dim); margin-top: 8px; }
body[data-lang="both"] .hero-title .t-en { font-size: .5em; color: var(--ink-mute); letter-spacing: -0.03em; }
.hero-lead { font-size: clamp(1rem, 2.2vw, 1.18rem); color: var(--ink-dim); max-width: 660px; margin: 0 auto 34px; letter-spacing: 0; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 8px; font-weight: 600; font-family: var(--sans);
  cursor: pointer; border: 1px solid transparent; font-size: .94rem; transition: .15s; letter-spacing: -0.01em;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--line-strong); background: var(--panel-2); }
.hero-cmd {
  display: inline-block; font-family: var(--mono); font-size: .85rem;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 10px 16px; color: var(--ink-dim);
}
.hero-cmd::before { content: "$ "; color: var(--ink-faint); }

/* ===== Benefits ===== */
.benefits {
  max-width: var(--maxw); margin: 0 auto; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}
.benefit { padding: 32px clamp(20px, 3vw, 36px); border-right: 1px solid var(--line); }
.benefit:last-child { border-right: 0; }
.benefit-no { font-family: var(--mono); color: var(--ink-faint); font-weight: 500; font-size: .8rem; }
.benefit h3 { margin: 12px 0 8px; font-size: 1.05rem; }
.benefit p { margin: 0; color: var(--ink-dim); font-size: .9rem; }
@media (max-width: 760px) { .benefits { grid-template-columns: 1fr; } .benefit { border-right: 0; border-bottom: 1px solid var(--line); } .benefit:last-child { border-bottom: 0; } }

/* ===== Sections ===== */
.section { max-width: var(--maxw); margin: 0 auto; padding: clamp(56px, 8vw, 96px) clamp(16px, 4vw, 40px); border-bottom: 1px solid var(--line); }
.section-head { margin-bottom: 36px; }
.section-head h2 { font-size: clamp(1.5rem, 3.6vw, 2.1rem); margin: 0 0 10px; letter-spacing: -0.035em; }
.section-head h2 .t-en { color: var(--ink-mute); }
body[data-lang="both"] .section-head h2 .t-en { font-size: .58em; font-weight: 500; }
.section-sub { color: var(--ink-dim); margin: 0; max-width: 700px; letter-spacing: 0; }
.section-sub strong { color: var(--ink); font-family: var(--mono); font-weight: 500; }

/* ===== Demo ===== */
.demo-pickers { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.demo-pick {
  border: 1px solid var(--line); background: var(--panel); color: var(--ink-dim);
  border-radius: 8px; padding: 8px 16px; cursor: pointer; font-weight: 600; transition: .15s; font-family: var(--jp);
}
.demo-pick:hover { color: var(--ink); border-color: var(--line-strong); }
.demo-pick.active { background: var(--accent); color: var(--on-accent); border-color: transparent; }
.demo-pick small { display: block; font-weight: 400; opacity: .7; font-size: .68rem; font-family: var(--mono); }
.demo-stage {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
}
.chat-bubble { border-radius: 10px; padding: 13px 16px; font-size: 1rem; }
.chat-bubble.user {
  background: var(--accent); color: var(--on-accent); max-width: 72%; margin-left: auto;
  border-bottom-right-radius: 3px; margin-bottom: 20px; font-weight: 500;
}
.chat-bubble.user .en-sub { border-top-color: rgba(0,0,0,.15); color: rgba(0,0,0,.55); }
.demo-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.demo-label { font-family: var(--mono); font-size: .74rem; color: var(--ink-mute); margin-bottom: 8px; letter-spacing: .02em; text-transform: uppercase; }
.demo-col.after .demo-label { color: var(--ink); }
.chat-bubble.assistant { border-bottom-left-radius: 3px; min-height: 84px; transition: opacity .18s; }
.chat-bubble.plain { background: var(--bg-2); border: 1px dashed var(--line-strong); color: var(--ink-dim); }
.chat-bubble.applied { background: var(--bg-2); border: 1px solid var(--ink); color: var(--ink); }
.chat-bubble .en-sub { display: block; margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--line); color: var(--ink-mute); font-size: .86em; }
.weight-control { display: flex; align-items: center; gap: 14px; margin-top: 22px; }
.weight-cap { font-family: var(--mono); font-size: .76rem; color: var(--ink-mute); text-transform: uppercase; letter-spacing: .04em; }
.weight-seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.weight-seg button {
  background: transparent; color: var(--ink-dim); border: 0; padding: 7px 16px;
  font-family: var(--mono); font-size: .8rem; cursor: pointer; transition: .15s; border-right: 1px solid var(--line);
}
.weight-seg button:last-child { border-right: 0; }
.weight-seg button:hover { color: var(--ink); background: var(--panel-2); }
.weight-seg button.active { background: var(--accent); color: var(--on-accent); font-weight: 600; }
@media (max-width: 720px) { .demo-compare { grid-template-columns: 1fr; } .chat-bubble.user { max-width: 88%; } }

/* ===== Filters / chips ===== */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.chip {
  border: 1px solid var(--line); background: var(--panel); color: var(--ink-dim);
  border-radius: 7px; padding: 6px 13px; cursor: pointer; font-size: .85rem; transition: .15s; font-family: var(--mono);
}
.chip:hover { color: var(--ink); border-color: var(--line-strong); }
.chip.active { background: var(--accent); color: var(--on-accent); border-color: transparent; font-weight: 600; }

/* ===== Gallery grid ===== */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.card {
  background: var(--panel); padding: 18px; cursor: pointer;
  transition: background .15s; position: relative;
}
.card:hover { background: var(--panel-2); }
.card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--c, var(--accent)); opacity: .55; }
.card:hover::before { opacity: 1; }
.card-cat { font-family: var(--mono); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-mute); }
.card-name { font-size: 1.12rem; font-weight: 700; margin: 5px 0 2px; letter-spacing: -0.02em; }
.card-name .en { font-family: var(--mono); font-size: .76rem; color: var(--ink-mute); font-weight: 400; }
.card-desc { font-size: .85rem; color: var(--ink-dim); margin: 10px 0 0; letter-spacing: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-tags { margin-top: 12px; display: flex; gap: 6px; flex-wrap: wrap; }
.tag { font-family: var(--mono); font-size: .7rem; background: var(--bg-2); border: 1px solid var(--line); border-radius: 5px; padding: 2px 7px; color: var(--ink-mute); }
.w-badge { position: absolute; top: 16px; right: 16px; font-family: var(--mono); font-size: .66rem; color: var(--ink-faint); text-transform: uppercase; }

/* ===== Blend ===== */
.blend-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.blend-pick, .blend-out { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.blend-pick-head { display: flex; justify-content: space-between; align-items: center; font-weight: 600; margin-bottom: 12px; font-size: .9rem; }
.link-btn { background: none; border: 0; color: var(--ink-mute); cursor: pointer; font-size: .8rem; font-family: var(--mono); }
.link-btn:hover { color: var(--ink); }
.blend-chosen { display: flex; flex-wrap: wrap; gap: 7px; min-height: 38px; margin-bottom: 14px; }
.chosen-pill {
  display: inline-flex; align-items: center; gap: 6px; background: var(--bg-2);
  border: 1px solid var(--line-strong); border-radius: 7px; padding: 5px 7px 5px 12px; font-size: .84rem;
}
.chosen-pill button { background: none; border: 0; color: var(--ink-mute); cursor: pointer; font-size: 1rem; line-height: 1; }
.chosen-pill button:hover { color: var(--ink); }
.blend-empty { color: var(--ink-mute); font-size: .85rem; align-self: center; font-family: var(--mono); }
.blend-options { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; max-height: 320px; overflow-y: auto; padding-right: 4px; }
.opt {
  display: flex; flex-direction: column; gap: 2px; text-align: left;
  border: 1px solid var(--line); background: var(--bg-1); color: var(--ink-dim);
  border-radius: var(--radius-sm); padding: 9px 12px; cursor: pointer; transition: .12s; font-size: .84rem;
}
.opt:hover { border-color: var(--line-strong); color: var(--ink); }
.opt.on { border-color: var(--ink); background: var(--panel-2); color: var(--ink); }
.opt small { color: var(--ink-mute); font-size: .7rem; font-family: var(--mono); }
.blend-conflict { margin-bottom: 12px; }
.conflict-warn {
  background: rgba(229,72,77,.10); border: 1px solid rgba(229,72,77,.45); color: #f5a3a6;
  border-radius: var(--radius-sm); padding: 10px 14px; font-size: .82rem; font-family: var(--mono);
}
.prompt-box {
  background: #050505; border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 16px; font-family: var(--mono); font-size: .8rem; line-height: 1.65;
  color: var(--ink-dim); white-space: pre-wrap; word-break: break-word; max-height: 420px; overflow-y: auto; margin: 0 0 14px;
}
#blend-copy { width: 100%; }
@media (max-width: 820px) { .blend-layout { grid-template-columns: 1fr; } .blend-options { grid-template-columns: 1fr; } }

/* ===== Quiz ===== */
.quiz-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(22px, 3vw, 36px); }
.quiz-progress { font-family: var(--mono); color: var(--ink-mute); font-size: .8rem; margin-bottom: 8px; }
.quiz-q { font-size: 1.3rem; font-weight: 700; margin: 0 0 22px; letter-spacing: -0.02em; }
.quiz-opts { display: grid; gap: 10px; }
.quiz-opt {
  text-align: left; border: 1px solid var(--line); background: var(--bg-1); color: var(--ink);
  border-radius: var(--radius-sm); padding: 14px 18px; cursor: pointer; font-size: 1rem; transition: .14s; font-family: var(--jp);
}
.quiz-opt:hover { border-color: var(--ink); background: var(--panel-2); }
.quiz-bar { height: 4px; background: var(--bg-2); border-radius: 999px; overflow: hidden; margin-bottom: 24px; }
.quiz-bar i { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.quiz-result h3 { font-size: 1.35rem; margin: 0 0 6px; letter-spacing: -0.02em; }
.result-blend { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
.result-pill { background: var(--bg-2); border: 1px solid var(--line-strong); border-radius: 9px; padding: 10px 16px; }
.result-pill b { display: block; font-size: 1.02rem; }
.result-pill small { color: var(--ink-mute); font-family: var(--mono); font-size: .7rem; }
.result-dropped { color: var(--warn); font-size: .82rem; margin: 8px 0; font-family: var(--mono); }
.quiz-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

/* ===== Modal ===== */
.modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.7); backdrop-filter: blur(3px); }
.modal-card {
  position: relative; z-index: 1; width: min(620px, 100%); max-height: 86vh; overflow-y: auto;
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 30px;
}
.modal-close { position: absolute; top: 14px; right: 16px; background: none; border: 0; color: var(--ink-mute); font-size: 1.6rem; cursor: pointer; line-height: 1; }
.modal-close:hover { color: var(--ink); }
.m-cat { font-family: var(--mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-mute); }
.m-name { font-size: 1.7rem; margin: 6px 0 0; letter-spacing: -0.03em; }
.m-name .en { font-family: var(--mono); font-size: .9rem; color: var(--ink-mute); font-weight: 400; }
.m-desc { color: var(--ink-dim); margin: 14px 0; }
.m-desc .en { display: block; color: var(--ink-mute); font-size: .9em; margin-top: 6px; }
.m-block { margin-top: 18px; }
.m-block h4 { font-family: var(--mono); font-size: .74rem; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-mute); margin: 0 0 8px; font-weight: 500; }
.m-list { display: flex; flex-wrap: wrap; gap: 6px; }
.m-list span { background: var(--bg-2); border: 1px solid var(--line); border-radius: 6px; padding: 5px 10px; font-size: .84rem; }
.m-meta { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 16px; font-size: .82rem; color: var(--ink-mute); font-family: var(--mono); }
.m-meta code { color: var(--ink); }
.m-add { margin-top: 24px; width: 100%; }

/* ===== Footer ===== */
.site-footer { padding: 44px clamp(16px, 4vw, 40px); }
.foot-inner { max-width: var(--maxw); margin: 0 auto; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: flex-start; }
.foot-inner strong { font-family: var(--sans); }
.foot-note { color: var(--ink-mute); font-size: .82rem; margin: 10px 0 0; max-width: 360px; }
.foot-links { display: flex; gap: 18px; font-family: var(--mono); font-size: .85rem; }
.foot-links a { color: var(--ink-dim); }
.foot-links a:hover { color: var(--ink); }

/* toast */
.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--accent); color: var(--on-accent); padding: 11px 22px; border-radius: 8px;
  font-weight: 600; opacity: 0; transition: .25s; z-index: 200; pointer-events: none; font-family: var(--mono); font-size: .85rem;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }