/* Differences from ../style.css only. Buttons are monochrome (black and grey), like the rest of the light pages.
   Demo classes are prefixed ykd-; the overlay's own rules are scoped under .ykd in assets/yakopop-demo.css. */
.brand-yakopop { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); }
.brand-yakopop img { display: block; height: 28px; width: auto; }
.top-nav { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.top-nav a { font: .7rem/1 var(--mono); text-transform: uppercase; letter-spacing: .14em; color: var(--muted); text-decoration: none; padding: 8px 0; }
.top-nav a:hover, .top-nav a:focus-visible { color: var(--fg); text-decoration: underline; }
@media (max-width: 900px) {
  .top-nav { order: 3; flex-basis: 100%; flex-wrap: nowrap; overflow-x: auto; gap: 18px; padding-bottom: 2px; scrollbar-width: none; }
  .top-nav::-webkit-scrollbar { display: none; }
  .top-nav a { white-space: nowrap; }
}

.hero { min-height: 0; padding-top: 168px; }
.hero-main { align-items: stretch; padding-bottom: 24px; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 40px 56px; }
.hero-copy { position: static; margin: 0; max-width: 34rem; align-self: center; }
.hero-copy h1 { font-size: clamp(2.4rem, 4.6vw, 5.2rem); }
.hero-copy .lead { max-width: 30rem; }
.hero-copy .quiet { max-width: 30rem; text-transform: none; letter-spacing: .02em; font-size: .78rem; }
.hero + .section { padding-top: 6rem; }
@media (max-width: 900px) { .hero-main { grid-template-columns: minmax(0, 1fr); } .hero { padding-top: 136px; } }
@media (max-width: 700px) { .hero + .section { padding-top: 5rem; } .section { padding: 5rem 0; } }

.cta-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 1.4em; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 20px; border-radius: 999px; border: 1px solid var(--faint); background: var(--card); color: var(--fg); text-decoration: none; font: .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .14em; cursor: pointer; }
.btn:hover { border-color: var(--fg); }
.btn.primary { background: var(--sel); border-color: var(--sel); color: var(--sel-fg); }
.btn.primary:hover { filter: brightness(1.1); }

.sub { max-width: 42rem; }
.section > .wrap > h2 { margin-bottom: 16px; }
.section > .wrap > .sub { color: var(--muted); }
.section > .wrap > .sub + .sub { margin-top: -.3em; }
.from { font: .66rem/1.6 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted) !important; max-width: 46rem; overflow-wrap: anywhere; }
.from code { text-transform: none; letter-spacing: 0; }
.mini-h { font: .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .16em; color: var(--muted); margin: 3rem 0 1rem; }

/* status badges: monochrome, told apart by their outline */
.badge.ok { background: var(--sel); color: var(--sel-fg); border-color: var(--sel); }
.badge.proto { color: var(--fg); border-color: var(--fg); background: none; }
.badge.plan { color: var(--muted); border-style: dashed; }
.badge.unv { color: var(--muted); border-style: dotted; }
.legend { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 1.2rem 0 0; padding: 0; list-style: none; font-size: .9rem; color: var(--muted); }
.legend li { display: flex; align-items: center; gap: 8px; }

/* cards and lists */
.grid-cards { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cards li { background: var(--card); border-radius: 28px; padding: 24px; box-shadow: 0 1px 0 var(--faint), 0 18px 40px -28px var(--shadow); min-width: 0; }
.grid-cards h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin-bottom: .6em; }
.grid-cards p { margin: 0 0 .7em; color: var(--muted); font-size: .96rem; }
.grid-cards p:last-child { margin-bottom: 0; }
@media (max-width: 1000px) { .grid-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-cards, .grid-cards.two { grid-template-columns: minmax(0, 1fr); } .grid-cards li { padding: 20px; } }
.grid-cards .from { margin: 0; font-size: .6rem; }

.steps-n { list-style: none; counter-reset: s; padding: 0; margin: 2rem 0 0; display: grid; gap: 0; }
.steps-n > li { counter-increment: s; display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: 4px 12px; padding: 22px 0; border-top: 1px solid var(--faint); }
.steps-n > li::before { content: counter(s); font: 600 .8rem/1.9 var(--mono); color: var(--muted); }
.steps-n h3 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin-bottom: .35em; }
.steps-n p { margin: 0 0 .6em; color: var(--muted); max-width: 46rem; }
.steps-n .from { margin: .2em 0 0; }
.steps-n > li > div { min-width: 0; }

.inv { list-style: none; margin: 1rem 0 0; padding: 0; }
.inv > li { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: 4px 28px; padding: 18px 0; border-top: 1px solid var(--faint); }
.inv h4 { margin: 0; font-size: 1rem; line-height: 1.3; display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: baseline; }
.inv p { margin: 0 0 .4em; color: var(--muted); max-width: 44rem; }
.inv .from { margin: 0; font-size: .6rem; }
.inv > li > div { min-width: 0; }
@media (max-width: 760px) { .inv > li { grid-template-columns: minmax(0, 1fr); } }
.inv-group { margin: 3rem 0 0; font-size: 1.3rem; }

.tbl { width: 100%; border-collapse: collapse; margin: 1.4rem 0 0; font-size: .95rem; }
.tbl th { text-align: left; font: .66rem/1.3 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--muted); padding: 8px 12px 8px 0; border-bottom: 1px solid var(--fg); }
.tbl td { padding: 14px 12px 14px 0; border-bottom: 1px solid var(--faint); vertical-align: top; color: var(--muted); }
.tbl td:first-child { color: var(--fg); font-weight: 600; }
.tbl-wrap { overflow-x: auto; max-width: 100%; }
@media (max-width: 760px) {
  .tbl, .tbl tbody, .tbl tr, .tbl td { display: block; }
  .tbl thead { display: none; }
  .tbl tr { padding: 14px 0; border-bottom: 1px solid var(--faint); }
  .tbl td { border: 0; padding: 2px 0; }
  .tbl td[data-l]::before { content: attr(data-l) ": "; font: .6rem/1 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
}

pre { max-width: 100%; }
.shape { margin: .8rem 0 0; }
.shape summary { cursor: pointer; font: .72rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .12em; padding: 8px 0; }
.shape pre { margin-top: 0; }
.note-card { margin-top: 2rem; background: var(--card); border-radius: 28px; padding: 24px; max-width: 46rem; box-shadow: 0 1px 0 var(--faint), 0 18px 40px -28px var(--shadow); }
.note-card p:last-child { margin-bottom: 0; }
.note-card .mono-h { margin-bottom: 12px; }
.fine { color: var(--muted); font-size: .9rem; max-width: 46rem; }

/* ---------- demos ---------- */
.demo { margin-top: 3rem; background: var(--card); border-radius: 28px; padding: 24px; box-shadow: 0 1px 0 var(--faint), 0 18px 40px -28px var(--shadow); min-width: 0; }
.demo > header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; margin-bottom: .5rem; }
.demo > header h3 { font-size: 1.35rem; }
.demo .sub { margin-bottom: 1rem; }
.fidelity { font: .62rem/1.5 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 1rem; }
.langs { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 1rem; }
.langs button, .ykd-pill { font: inherit; font-size: .9rem; padding: 6px 14px; min-height: 36px; border-radius: 14px; border: 0; background: var(--pill); color: var(--fg); cursor: pointer; }
.langs button:hover, .ykd-pill:hover { filter: brightness(.97); }
.langs button[aria-pressed="true"], .ykd-pill.on { background: var(--sel); color: var(--sel-fg); }
.mount { min-width: 0; min-height: 120px; }
.mount > .loading { color: var(--muted); font: .72rem/1.6 var(--mono); text-transform: uppercase; letter-spacing: .1em; padding: 24px 0; }
@media (max-width: 640px) { .demo { padding: 16px; border-radius: 24px; } }

/* the dark stage the overlay is drawn on (the overlay is made for video) */
.ykd { --text: #e6e9f0; --muted: #8a93a6; --particle: #9aa3b2; --accent: #ececea; --sans: system-ui, -apple-system, "Segoe UI", "Noto Sans JP", Helvetica, Arial, sans-serif; color: var(--text); }
.ykd-frame { position: relative; border-radius: 20px; overflow: hidden; background: #14161d; color: #e6e9f0; min-width: 0; }
.ykd-video { aspect-ratio: 16 / 9; min-height: 440px; }
.ykd-scene { position: absolute; inset: 0; display: flex; justify-content: center; align-items: flex-start; padding-top: 74px; font: .62rem/1.4 ui-monospace, Menlo, monospace; text-transform: uppercase; letter-spacing: .12em; color: rgba(255,255,255,.4); text-align: center; pointer-events: none; }
.ykd-free { padding: 28px 12px 26px; background: #14161d; }
.ykd-free .subs { position: relative; left: auto; right: auto; bottom: auto; padding: 0; }
.ykd-free .src { padding: 8px 10px; border-radius: 14px; background: rgba(0,0,0,var(--box-a, .55)); width: fit-content; max-width: 100%; margin: 0 auto; }
.ykd-free .en { width: fit-content; max-width: 100%; margin: 10px auto 0; padding: 2px 12px; border-radius: 10px; background: rgba(0,0,0,var(--box-a, .55)); }
.ykd-free .subs.no-box .src, .ykd-free .subs.no-box .en { background: none; }
.ykd-free .tok { opacity: .7; }
.ykd-free .tok.spoken { opacity: .88; }
.ykd-free .tok.active, .ykd-free .tok:hover { opacity: 1; }
.ykd-free.ykd-mini { min-height: 150px; margin-top: 12px; }
.ykd-free .wcard { z-index: 6; }
/* the overlay was made for a 1280 px video: scale the rows down on a phone */
@media (max-width: 700px) { .ykd .subs { --k: .66; } .ykd-video { aspect-ratio: auto; height: 520px; min-height: 0; } .ykd-free { padding: 24px 6px 20px; } }
/* the site's classes that share a name with the overlay's (.track, .tag, .pill) must not leak in */
.ykd .yk .track { overflow: visible; padding: 0; gap: 0; scroll-snap-type: none; -webkit-mask-image: none; mask-image: none; list-style: none; }
.ykd .tag { font-family: inherit; text-transform: none; gap: 0; text-align: inherit; margin: 0; align-items: baseline; }
.ykd .yk .pill { text-transform: none; min-height: 0; }
.ykd button { letter-spacing: normal; text-transform: none; }

/* controls under a demo (on the light card) */
.ykd-stackdemo, .ykd-talk, .ykd-tr { min-width: 0; }
.ykd-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 12px 0; }
.ykd-btn { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 18px; border-radius: 999px; border: 1px solid var(--sel); background: var(--sel); color: var(--sel-fg); font: .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .12em; cursor: pointer; }
.ykd-btn:hover:not(:disabled) { filter: brightness(1.15); }
.ykd-btn:disabled { background: var(--pill); color: var(--muted); border-color: var(--faint); cursor: not-allowed; }
.ykd-btn[aria-pressed="true"], .ykd-btn[aria-expanded="true"] { background: #4a4a47; }
.ykd-time { font: .72rem/1 var(--mono); color: var(--muted); }
.ykd-set { border: 0; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: center; min-width: 0; }
.ykd-set legend { font: .62rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); padding: 0; margin-bottom: 6px; float: left; width: 100%; }
.ykd-set legend + * { clear: left; }
.ykd-chip { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 4px 12px; border-radius: 14px; background: var(--pill); cursor: pointer; font-size: .9rem; }
.ykd-chip input { accent-color: #1d1d1b; width: 16px; height: 16px; margin: 0; }
.ykd-vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.ykd-note { color: var(--muted); font-size: .88rem; margin: 8px 0 0; }
.ykd-err { color: #8a2a1a; font-size: .9rem; margin: 8px 0 0; }

/* Talk demo */
.ykd-talk { background: #14161d; border-radius: 20px; padding: 14px; color: #e6e9f0; }
.ykd-talk-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.ykd-talk-who { font: .66rem/1 ui-monospace, Menlo, monospace; text-transform: uppercase; letter-spacing: .14em; color: #aab1c0; }
.ykd-talk .ykd-btn { background: #e6e9f0; color: #14161d; border-color: #e6e9f0; min-height: 40px; padding: 6px 14px; text-transform: none; letter-spacing: 0; font-size: .9rem; }
.ykd-talk .ykd-btn[aria-expanded="true"] { background: #9aa0ad; }
.ykd-card { margin: 12px 0 0; padding: 14px; border-radius: 16px; background: #1e2230; border: 1px solid #2c3244; }
.ykd-card-h { font: .62rem/1 ui-monospace, Menlo, monospace; text-transform: uppercase; letter-spacing: .12em; color: #8f97a8; margin: 0 0 8px; }
.ykd-card .ykd-chip { background: #2a3042; color: #e6e9f0; margin: 0 6px 6px 0; }
.ykd-card .ykd-chip input { accent-color: #e6e9f0; }
.ykd-langs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.ykd-card .ykd-pill { background: #2a3042; color: #e6e9f0; }
.ykd-card .ykd-pill.on { background: #e6e9f0; color: #14161d; }
.ykd-card .ykd-note { color: #8f97a8; }
.ykd-bubbles { display: grid; gap: 10px; margin: 16px 0 6px; min-height: 230px; align-content: end; }
.ykd-bub { max-width: min(92%, 34rem); padding: 10px 14px 12px; border-radius: 18px; background: #f3f2ee; color: #1b1d24; font-size: 1.02rem; line-height: 1.45; position: relative; transition: opacity .25s; min-width: 0; }
.ykd-bub.them { justify-self: start; border-bottom-left-radius: 4px; }
.ykd-bub.me { justify-self: end; background: #d9dce4; border-bottom-right-radius: 4px; }
.ykd-bub.think { background: #e9ebf3; color: #3a4056; font-style: italic; border-style: dashed; border-width: 2px; border-color: #b7bccb; }
.ykd-bub.shout { background: #ffe9a8; font-weight: 700; }
.ykd-bub.old { opacity: .55; }
.ykd-tk-ghost { opacity: .22; }
.ykd-tk-words { display: flex; flex-wrap: wrap; gap: 4px 6px; align-items: flex-end; }
.ykd-tk-word { display: inline-flex; flex-direction: column; align-items: center; border: 0; background: none; color: inherit; font: inherit; padding: 2px 3px; border-radius: 8px; cursor: pointer; line-height: 1.25; }
.ykd-tk-word:hover, .ykd-tk-word:focus-visible { background: rgba(0,0,0,.08); }
.ykd-tk-word .rd { font-size: .62em; color: #5f6578; min-height: 1.1em; }
.ykd-tk-word .og { font-size: 1.15em; font-weight: 600; }
.ykd-tk-word .ro { font-size: .66em; color: #5f6578; font-style: italic; min-height: 1.1em; }
.ykd-tk-words .en { flex-basis: 100%; font-size: .78em; color: #4a5064; margin-top: 4px; font-style: normal; font-weight: 400; }
.ykd-tk-words .en.ghost { opacity: .35; }
.ykd-blip { position: absolute; right: 12px; top: 8px; width: 6px; height: 6px; border-radius: 50%; background: #1b1d24; opacity: .5; }
.ykd-choices { display: grid; gap: 8px; margin-top: 10px; justify-items: end; }
.ykd-choice { border: 1px dashed #5b6277; background: #1e2230; color: #e6e9f0; border-radius: 16px; padding: 8px 14px; cursor: pointer; text-align: left; max-width: 100%; font: inherit; }
.ykd-choice:hover, .ykd-choice:focus-visible { background: #2a3042; border-color: #e6e9f0; }
.ykd-choice.think { font-style: italic; }
.ykd-choice.shout { font-weight: 700; }
.ykd-choice .ykd-tk-word { color: #e6e9f0; }
.ykd-choice .ykd-tk-word:hover { background: rgba(255,255,255,.12); }
.ykd-choice .ykd-tk-word .rd, .ykd-choice .ykd-tk-word .ro, .ykd-choice .ykd-tk-words .en { color: #aab1c0; }
.ykd-talk .ykd-note { color: #8f97a8; }

/* transcript demo */
.ykd-tr { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px 28px; }
.ykd-tr-col { min-width: 0; }
.ykd-tr-col.wide { grid-column: 1 / -1; }
.ykd-tr-h { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; font-size: 1rem; margin-bottom: 4px; }
.ykd-tr-h span { font: .62rem/1.9 var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--muted); }
.ykd-ta { width: 100%; font: .78rem/1.5 var(--mono); border: 1px solid var(--faint); border-radius: 14px; background: #fff; color: var(--fg); padding: 12px; resize: vertical; min-height: 160px; }
.ykd-cues { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 300px; overflow-y: auto; }
.ykd-cue { width: 100%; text-align: left; display: grid; grid-template-columns: 4.2rem minmax(0, 1fr); gap: 0 8px; padding: 8px 12px; border-radius: 14px; border: 1px solid var(--faint); background: #fff; color: var(--fg); font: inherit; cursor: pointer; }
.ykd-cue.on { border-color: var(--fg); box-shadow: inset 0 0 0 1px var(--fg); }
.ykd-cue small { grid-row: 1 / 3; font: .64rem/1.8 var(--mono); color: var(--muted); }
.ykd-cue .o { font-weight: 600; overflow-wrap: anywhere; }
.ykd-cue .t { color: var(--muted); font-size: .9rem; overflow-wrap: anywhere; }
.ykd-pre { max-height: 220px; overflow: auto; }
@media (max-width: 860px) { .ykd-tr { grid-template-columns: minmax(0, 1fr); } }

.kam-note { display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: center; }
.kam-note img { height: 36px; width: auto; }
.links a { font-weight: 600; }
.site-footer p { margin: 0; }

/* hero: a still of the real stack (the same markup SubtitleStack draws) */
.hero-art { min-width: 0; }
.hero-art .ykd-frame { border-radius: 28px; padding: 40px 12px 30px; box-shadow: 0 1px 0 var(--faint), 0 18px 40px -28px var(--shadow); }
.hero-art figcaption { font: .62rem/1.6 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-top: 10px; }
.hero-art .subs { --s-rd: 16; --s-og: 34; --s-ro: 16; --s-gl: 13; --s-gr: 11; --s-en: 21; --o-og: 0; --o-rd: 1; --o-ro: 2; --o-gl: 3; --o-gr: 4; }
.hero-art .tok { opacity: .85; cursor: default; }
.hero-art .tok.active { opacity: 1; }
@media (max-width: 700px) { .hero-art .subs { --k: .62; } .hero-art .ykd-frame { padding: 28px 4px 22px; } }

/* phones: the player's control bar wraps (time on its own row) and the player runs edge to edge in its card */
@media (max-width: 640px) {
  .demo { padding: 14px 10px; }
  .mount[data-demo="player"] { margin: 0 -10px; }
  .mount[data-demo="player"] .ykd-frame { border-radius: 14px; }
  .ykd .yk .cbar { flex-wrap: wrap; }
  .ykd .yk .time { order: -1; flex: 1 0 100%; margin: 0 0 0 8px; }
  .ykd .yk .cbtn { width: 40px; height: 40px; }
}
@media (max-width: 640px) {
  .ykd-video { height: 600px; }
  .ykd .yk.ui .yk-subs { transform: translateY(-172px); }
}