/* ============================================================
   Pennix pipeline demo — brand-guide styles.

   Every token below comes from branding/GUIDES.pdf:
     Midnight Navy  #0F172A   (background)
     Pure White     #FFFFFF   (headline ink)
     Electric Indigo #4F6CF5  (primary accent + tints from the
                               official mark: #BCC8FF · #6F7DFF ·
                               #2A3EB8 · #1F2F8A)
     Bright Cyan    #06B6D4   (success / “done” accent)
     Slate neutrals from the guide's tint strip for dim text.
   Typography: Inter only — Bold 700 / Medium 500 / Light 300
   (the three weights the guide allows). No other font family.
   Logo rules honored: official mark colors untouched, no drop
   shadows on the lockup, generous clear space, ≥45px height.
   ============================================================ */

:root {
  --navy: #0f172a;        /* Midnight Navy */
  --navy-raise: #16203a;  /* navy lifted for panels (navy + white 4%) */
  --white: #ffffff;
  --indigo: #4f6cf5;      /* Electric Indigo */
  --indigo-soft: #6f7dff; /* mark tint */
  --indigo-pale: #bcc8ff; /* mark tint */
  --indigo-deep: #2a3eb8; /* mark tint */
  --cyan: #06b6d4;        /* Bright Cyan */
  --cyan-bright: #22d3ee; /* cyan tint row from the guide */
  --ink: #ffffff;
  --ink-dim: #cbd5e1;     /* slate tint strip */
  --ink-faint: #94a3b8;   /* slate tint strip */
  --card: rgba(255, 255, 255, 0.045);
  --card-edge: rgba(188, 200, 255, 0.14);
  --radius: 14px;
  font-size: clamp(13px, 1.05vw, 17px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-weight: 500; /* Inter Medium is the guide's body weight */
  background:
    radial-gradient(1100px 700px at 75% -10%, rgba(79, 108, 245, 0.16), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(42, 62, 184, 0.14), transparent 55%),
    var(--navy);
  color: var(--ink);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--indigo-deep); color: #fff; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--indigo); outline-offset: 2px; }

/* ---------- chrome: header / footer controls ---------- */

.demo-shell { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }

.demo-topbar {
  display: flex; align-items: center; gap: 0.9rem;
  padding: 0.85rem 1.4rem;
  border-bottom: 1px solid rgba(188, 200, 255, 0.08);
  backdrop-filter: blur(6px);
  z-index: 30;
}

/* Official lockup: mark + wordmark + letterspaced indigo tagline.
   45px min height per the guide; no shadows, no recoloring. */
.lockup { display: flex; align-items: center; gap: 0.55rem; min-height: 45px; }
.lockup .mark { width: 2rem; height: 1.87rem; flex: none; }
.lockup .wordmark { font-weight: 700; letter-spacing: -0.02em; font-size: 1.18rem; line-height: 1.05; color: var(--white); }
.lockup .tagline { font-size: 0.44rem; font-weight: 500; letter-spacing: 0.32em; text-transform: uppercase; color: var(--indigo-soft); margin-top: 0.14rem; white-space: nowrap; }

.demo-topbar .divider { width: 1px; height: 1.4rem; background: rgba(188, 200, 255, 0.18); }
.demo-topbar .scene-title { font-size: 0.92rem; color: var(--ink-dim); font-weight: 500; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.demo-topbar .spacer { flex: 1; }
.demo-topbar .kbd-hint { font-size: 0.72rem; color: var(--ink-faint); font-weight: 500; }
.demo-topbar .kbd-hint kbd {
  font-family: inherit; border: 1px solid rgba(188,200,255,0.25); border-radius: 5px;
  padding: 0.08rem 0.38rem; margin: 0 0.12rem; font-size: 0.68rem; color: var(--ink-dim);
}

.demo-stage {
  position: relative; flex: 1; min-height: 0;
  display: flex; align-items: stretch; justify-content: center;
}

.demo-controls {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.6rem 1.4rem 1rem;
  z-index: 30;
}
.ctl-btn {
  appearance: none; border: 1px solid rgba(188, 200, 255, 0.22);
  background: rgba(255, 255, 255, 0.05); color: var(--ink);
  border-radius: 999px; width: 2.6rem; height: 2.6rem;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 1rem; transition: background 0.2s, transform 0.15s;
  flex: none;
}
.ctl-btn:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-1px); }
.ctl-btn.primary { background: var(--indigo); border-color: var(--indigo); width: 3.1rem; height: 3.1rem; font-size: 1.15rem; }
.ctl-btn.primary:hover { background: var(--indigo-soft); }
.ctl-btn svg { width: 1.05em; height: 1.05em; fill: currentColor; }

.scene-dots { display: flex; gap: 0.42rem; flex-wrap: wrap; align-items: center; flex: 1; justify-content: center; min-width: 0; }
.scene-dot {
  appearance: none; border: 1px solid rgba(188, 200, 255, 0.2); cursor: pointer;
  background: rgba(255, 255, 255, 0.04); color: var(--ink-dim);
  border-radius: 999px; padding: 0.3rem 0.7rem; font-size: 0.7rem; font-weight: 500;
  transition: background 0.2s, border-color 0.2s, color 0.2s; white-space: nowrap;
}
.scene-dot:hover { color: var(--ink); border-color: rgba(188, 200, 255, 0.45); }
.scene-dot.active { background: var(--indigo); border-color: var(--indigo); color: #fff; font-weight: 700; }
.scene-dot .n { opacity: 0.6; margin-right: 0.3rem; }

.progress-rail { position: absolute; left: 0; right: 0; top: 0; height: 3px; background: rgba(188, 200, 255, 0.08); z-index: 40; }
.progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--indigo), var(--indigo-pale)); transition: width 0.25s linear; }

/* ---------- the pipeline rail: the value prop, always on screen ---------- */

.pipe-rail {
  display: flex; align-items: center; gap: 0.55rem;
  margin: 0 auto; padding: 0.5rem 1.1rem;
  width: min(46rem, 94vw);
  border: 1px solid var(--card-edge); border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  opacity: 0; transform: translateY(8px); pointer-events: none;
  transition: opacity 0.5s ease, transform 0.5s ease;
  z-index: 30;
}
.pipe-rail.show { opacity: 1; transform: none; }
.pr-label {
  font-size: 0.6rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--indigo-soft); margin-right: 0.3rem; white-space: nowrap;
}
.pr-stage {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.72rem; font-weight: 500; color: var(--ink-faint); white-space: nowrap;
  transition: color 0.4s;
}
.pr-dot {
  width: 0.62rem; height: 0.62rem; border-radius: 50%; flex: none;
  border: 2px solid rgba(148, 163, 184, 0.55); background: transparent;
  transition: background 0.4s, border-color 0.4s, box-shadow 0.4s;
}
.pr-stage.done { color: var(--ink-dim); }
.pr-stage.done .pr-dot { background: var(--cyan); border-color: var(--cyan); }
.pr-stage.now { color: var(--white); font-weight: 700; }
.pr-stage.now .pr-dot {
  background: var(--indigo); border-color: var(--indigo);
  animation: railPulse 1.4s ease-in-out infinite;
}
@keyframes railPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79, 108, 245, 0.45); }
  50% { box-shadow: 0 0 0 6px rgba(79, 108, 245, 0.12); }
}
.pr-link { flex: 1; height: 2px; background: rgba(148, 163, 184, 0.22); min-width: 0.8rem; transition: background 0.4s; }
.pr-link.done { background: var(--cyan); }

/* ---------- scenes ---------- */

.scene {
  position: absolute; inset: 0; padding: 1.4rem 2rem;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(14px) scale(0.985);
  /* never transition `visibility` — discrete-property transitions strand
     children of `transition: all` elements at `hidden` */
  transition: opacity 0.55s ease, transform 0.55s ease;
  overflow: hidden;
}
.scene.active { opacity: 1; visibility: visible; transform: none; z-index: 10; }
.scene > * { max-width: 100%; min-width: 0; }

.scene-kicker {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--indigo-soft); margin-bottom: 0.5rem;
}
.scene-h {
  font-size: clamp(1.45rem, 2.9vw, 2.3rem); font-weight: 700; letter-spacing: -0.025em;
  text-align: center; margin-bottom: 0.45rem; line-height: 1.18;
}
.scene-sub { color: var(--ink-dim); font-size: 0.98rem; font-weight: 300; text-align: center; max-width: 46rem; margin-bottom: 1.2rem; line-height: 1.55; }
.scene-sub b { font-weight: 700; color: var(--ink); }
.scene-h .hl { color: var(--indigo); }
.hl-strong { color: var(--indigo-pale); font-weight: 700; }
.takeaway { margin-top: 1rem; margin-bottom: 0; font-size: 1.02rem; }

/* step-in reveal primitive: scenes toggle .on per beat */
.beat { opacity: 0; transform: translateY(12px); transition: opacity 0.5s ease, transform 0.5s ease; }
.beat.on { opacity: 1; transform: none; }

/* ---------- hero lockup (intro / finale) ---------- */

.hero-lockup { display: flex; flex-direction: column; align-items: center; padding: 1rem 0 1.4rem; }
.hero-mark { width: clamp(4.6rem, 9vw, 7rem); height: auto; aspect-ratio: 456 / 426; }
.hero-wordmark { font-size: clamp(2rem, 4.4vw, 3.2rem); font-weight: 700; letter-spacing: -0.02em; color: var(--white); margin-top: 0.6rem; line-height: 1; }
.hero-tagline { font-size: clamp(0.55rem, 1vw, 0.72rem); font-weight: 500; letter-spacing: 0.42em; text-transform: uppercase; color: var(--indigo); margin-top: 0.55rem; }

.act-chips { display: flex; align-items: center; gap: 0.7rem; margin-top: 1.1rem; flex-wrap: wrap; justify-content: center; }
.act-chip {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border: 1px solid rgba(188, 200, 255, 0.25); border-radius: 999px;
  padding: 0.5rem 1.1rem; font-size: 0.88rem; font-weight: 700; color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
}
.act-chip .n { color: var(--indigo-soft); font-size: 0.72rem; font-weight: 700; }
.act-chip.done { border-color: rgba(6, 182, 212, 0.5); }
.act-chip.done .n { color: var(--cyan-bright); }
.act-arrow { color: var(--ink-faint); font-weight: 300; }

/* ---------- “the old way” mess cards ---------- */

.mess-row { display: flex; gap: 1rem; margin-top: 0.6rem; flex-wrap: wrap; justify-content: center; }
.mess-card {
  width: 13.5rem; text-align: center; padding: 1.1rem 1rem 1rem;
  background: var(--card); border: 1px solid var(--card-edge); border-radius: var(--radius);
}
.mess-card:nth-child(1) { transform: rotate(-2deg); }
.mess-card:nth-child(3) { transform: rotate(1.6deg); }
.mess-card.beat { transform: translateY(12px); }
.mess-card.beat.on:nth-child(1) { transform: rotate(-2deg); }
.mess-card.beat.on:nth-child(2) { transform: none; }
.mess-card.beat.on:nth-child(3) { transform: rotate(1.6deg); }
.mess-icon { font-size: 1.7rem; margin-bottom: 0.4rem; }
.mess-name { font-weight: 700; font-size: 0.85rem; }
.mess-sub { font-size: 0.72rem; color: var(--ink-dim); font-weight: 300; margin-top: 0.2rem; line-height: 1.4; }
.mess-count { margin-top: 1rem; font-size: 0.9rem; color: var(--ink-dim); font-weight: 300; }
.mess-count b { color: var(--white); font-weight: 700; }

/* ---------- shared mock-UI primitives ---------- */

.browser {
  width: min(58rem, 94vw); background: var(--navy-raise);
  border: 1px solid var(--card-edge); border-radius: var(--radius);
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.6);
  overflow: hidden;
}
.browser-bar {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.55rem 0.9rem;
  background: rgba(255, 255, 255, 0.03); border-bottom: 1px solid rgba(188, 200, 255, 0.08);
}
.browser-bar .b-dot { width: 0.6rem; height: 0.6rem; border-radius: 50%; background: rgba(188, 200, 255, 0.22); }
.browser-bar .b-url {
  flex: 1; margin-left: 0.6rem; background: rgba(255, 255, 255, 0.05);
  border-radius: 7px; padding: 0.28rem 0.8rem; font-size: 0.68rem; color: var(--ink-dim);
  max-width: 26rem; font-weight: 500; letter-spacing: 0.01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.browser-body { padding: 1.1rem 1.3rem; min-height: 18rem; position: relative; }

.pill {
  display: inline-flex; align-items: center; gap: 0.35rem;
  border-radius: 999px; padding: 0.22rem 0.68rem; font-size: 0.68rem; font-weight: 700;
  background: rgba(188, 200, 255, 0.1); color: var(--indigo-pale);
}
.pill.good { background: rgba(6, 182, 212, 0.14); color: var(--cyan-bright); }
.pill.flag { background: rgba(79, 108, 245, 0.16); color: var(--indigo-pale); border: 1px dashed rgba(188, 200, 255, 0.4); }

.card {
  background: var(--card); border: 1px solid var(--card-edge);
  border-radius: var(--radius); padding: 1rem 1.15rem;
}

/* ---------- the Pennix voice (avatar + bubble) ---------- */

.avatar {
  position: relative; width: 3.4rem; height: 3.4rem; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  background: radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.24), transparent 55%), var(--indigo);
  box-shadow: inset 0 -0.55rem 0.9rem rgba(15, 23, 42, 0.35), 0 6px 18px rgba(15, 23, 42, 0.45);
}
.avatar svg { width: 62%; height: 62%; }
.avatar.xs { width: 1.25rem; height: 1.25rem; box-shadow: none; vertical-align: -0.3rem; margin-right: 0.35rem; }

.bubble {
  position: relative; max-width: 26rem;
  background: rgba(79, 108, 245, 0.1); border: 1px solid rgba(111, 125, 255, 0.3);
  border-radius: 14px; padding: 0.7rem 0.95rem; font-size: 0.83rem; font-weight: 300; line-height: 1.5;
}
.bubble b { font-weight: 700; }
.bubble .who {
  display: flex; align-items: center;
  font-size: 0.64rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 0.3rem; color: var(--indigo-pale);
}
.caret { display: inline-block; width: 0; height: 0.9em; border-right: 2px solid var(--indigo-pale); margin-left: 2px; vertical-align: -0.15em; animation: caretBlink 0.9s steps(1) infinite; }
@keyframes caretBlink { 50% { opacity: 0; } }

/* ---------- documents ---------- */

.doc {
  display: flex; align-items: center; gap: 0.65rem;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--card-edge);
  border-radius: 10px; padding: 0.55rem 0.75rem; font-size: 0.78rem;
}
.doc + .doc { margin-top: 0.5rem; }
.doc .icon {
  width: 1.9rem; height: 2.3rem; border-radius: 5px; flex: none;
  background: linear-gradient(160deg, #ffffff, #bcc8ff); position: relative;
}
.doc .icon::after {
  content: ""; position: absolute; left: 0.32rem; right: 0.32rem; top: 0.42rem;
  height: 0.14rem; background: #4f6cf588; border-radius: 2px;
  box-shadow: 0 0.34rem 0 #4f6cf555, 0 0.68rem 0 #4f6cf533;
}
.doc .meta { min-width: 0; flex: 1; }
.doc .name { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doc .sub { color: var(--ink-dim); font-size: 0.68rem; font-weight: 300; margin-top: 0.1rem; }
.doc.named { border-color: rgba(6, 182, 212, 0.28); }

/* generic progress bar */
.bar { height: 0.45rem; border-radius: 999px; background: rgba(188, 200, 255, 0.12); overflow: hidden; }
.bar .fill { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--indigo), var(--indigo-pale)); transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1); }

/* ---------- split pages (read scene) ---------- */

.split-pages { display: flex; gap: 0.6rem; margin-top: 0.7rem; }
.split-pages .pg {
  flex: 1; text-align: center; font-size: 0.72rem; font-weight: 700; line-height: 1.35;
  border: 1px solid rgba(111, 125, 255, 0.35); border-radius: 8px; padding: 0.6rem 0.3rem;
  background: rgba(79, 108, 245, 0.08);
}
.split-pages .pg i { font-style: normal; font-weight: 300; color: var(--ink-dim); font-size: 0.64rem; }

/* ---------- alternate submit ways ---------- */

.alt-way { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.5rem 0; font-size: 0.78rem; border-bottom: 1px solid rgba(188, 200, 255, 0.07); }
.alt-way:last-child { border-bottom: none; }
.alt-way .alt-ic { font-size: 1.05rem; flex: none; margin-top: 0.05rem; }
.alt-way b { font-weight: 700; }
.alt-way span { color: var(--ink-dim); font-weight: 300; font-size: 0.72rem; }

/* ---------- upload dropzone ---------- */

.dropzone {
  border: 2px dashed rgba(188, 200, 255, 0.3); border-radius: var(--radius);
  padding: 1.5rem; text-align: center; color: var(--ink-dim); font-size: 0.85rem; font-weight: 300;
  transition: border-color 0.3s, background 0.3s, color 0.3s;
}
.dropzone.hot { border-color: var(--indigo-pale); background: rgba(79, 108, 245, 0.1); color: var(--ink); }

/* ---------- checklist rows ---------- */

.checklist-row { display: flex; align-items: center; gap: 0.55rem; padding: 0.46rem 0; font-size: 0.8rem; border-bottom: 1px solid rgba(188, 200, 255, 0.06); }
.checklist-row:last-child { border-bottom: none; }
.checklist-row .box {
  width: 1.05rem; height: 1.05rem; border-radius: 5px; flex: none;
  border: 1.6px solid rgba(188, 200, 255, 0.35); display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.66rem; color: var(--navy); font-weight: 700; transition: background 0.35s, border-color 0.35s;
}
.checklist-row.done .box { background: var(--cyan); border-color: var(--cyan); }
.checklist-row.done .lbl { color: var(--ink); }
.checklist-row.flagged .box { background: var(--indigo); border-color: var(--indigo); color: #fff; }
.checklist-row .lbl { color: var(--ink-dim); font-weight: 300; flex: 1; }
.checklist-row .lbl b { font-weight: 700; color: var(--ink); }

/* ---------- phone approval (ask scene) ---------- */

.phone {
  width: 15rem; margin: 0 auto; border-radius: 1.6rem;
  border: 1px solid rgba(188, 200, 255, 0.25); background: var(--navy);
  padding: 0.55rem; position: relative;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.55);
}
.phone-notch { width: 5.5rem; height: 0.85rem; border-radius: 999px; background: rgba(188, 200, 255, 0.12); margin: 0.15rem auto 0.55rem; }
.phone-body { border-radius: 1.1rem; background: rgba(255, 255, 255, 0.04); padding: 0.8rem; min-height: 11rem; }
.phone-title { font-size: 0.64rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--indigo-soft); margin-bottom: 0.6rem; }
.phone-card { background: rgba(255, 255, 255, 0.05); border: 1px solid var(--card-edge); border-radius: 10px; padding: 0.7rem; }
.phone-btn {
  margin-top: 0.2rem; text-align: center; border-radius: 999px; padding: 0.5rem;
  background: var(--indigo); color: #fff; font-weight: 700; font-size: 0.78rem;
  transition: background 0.3s, transform 0.15s; cursor: default;
}
.phone-btn.tapped { background: var(--cyan); color: var(--navy); transform: scale(0.97); }
.phone-sent {
  margin-top: 0.7rem; font-size: 0.72rem; font-weight: 700; color: var(--cyan-bright);
  opacity: 0; transform: translateY(8px); transition: opacity 0.4s, transform 0.4s;
}
.phone-sent.show { opacity: 1; transform: none; }

/* ---------- stats + live feed (scale scene) ---------- */

.stat-row { display: flex; gap: 1rem; margin: 0.6rem 0 1.1rem; flex-wrap: wrap; justify-content: center; }
.stat {
  min-width: 10rem; text-align: center; padding: 0.9rem 1.1rem;
  background: var(--card); border: 1px solid var(--card-edge); border-radius: var(--radius);
}
.stat-n { font-size: 1.9rem; font-weight: 700; letter-spacing: -0.02em; color: var(--indigo-pale); font-variant-numeric: tabular-nums; }
.stat-n.cyan { color: var(--cyan-bright); }
.stat-l { font-size: 0.7rem; color: var(--ink-dim); font-weight: 300; margin-top: 0.15rem; }

.feed-row {
  display: flex; align-items: flex-start; gap: 0.6rem; padding: 0.5rem 0.2rem;
  border-bottom: 1px solid rgba(188, 200, 255, 0.06); font-size: 0.78rem;
  opacity: 0; transform: translateY(8px); transition: opacity 0.4s, transform 0.4s;
}
.feed-row:last-child { border-bottom: none; }
.feed-row.on { opacity: 1; transform: none; }
.feed-row .t { color: var(--ink-faint); font-size: 0.64rem; font-weight: 500; width: 2.6rem; flex: none; padding-top: 0.15rem; font-variant-numeric: tabular-nums; }
.feed-row .txt { color: var(--ink-dim); font-weight: 300; line-height: 1.4; }
.feed-row .txt b { color: var(--ink); font-weight: 700; }

/* ---------- toast ---------- */

.toast {
  position: absolute; right: 1.2rem; bottom: 1.2rem; z-index: 28;
  display: flex; align-items: center; gap: 0.6rem;
  background: var(--navy-raise); border: 1px solid var(--card-edge);
  border-left: 3px solid var(--cyan); border-radius: 10px;
  padding: 0.65rem 1rem; font-size: 0.78rem; font-weight: 700;
  box-shadow: 0 14px 40px rgba(15, 23, 42, 0.55);
  opacity: 0; transform: translateY(12px); transition: opacity 0.4s, transform 0.4s;
}
.toast.show { opacity: 1; transform: none; }

/* two-column scene layout */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; width: min(58rem, 94vw); align-items: start; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .duo { grid-template-columns: 1fr; }
  .demo-topbar .kbd-hint { display: none; }
  .browser-body { min-height: 15rem; }
  .pipe-rail { width: 94vw; }
  .pr-label { display: none; }
}

@media (max-width: 700px) {
  :root { font-size: 13px; }

  /* scenes: top-anchored and internally scrollable instead of clipped */
  .scene {
    padding: 1rem 0.9rem 2rem;
    justify-content: flex-start;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(188, 200, 255, 0.25) transparent;
  }
  .scene::-webkit-scrollbar { width: 4px; }
  .scene::-webkit-scrollbar-thumb { background: rgba(188, 200, 255, 0.25); border-radius: 4px; }
  .scene::-webkit-scrollbar-track { background: transparent; }
  .scene-sub { font-size: 0.85rem; margin-bottom: 1rem; }

  .demo-topbar { padding: 0.6rem 0.9rem; gap: 0.55rem; }
  .demo-topbar .divider { display: none; }
  .lockup .tagline { display: none; }
  .demo-topbar .scene-title { font-size: 0.8rem; }

  .pipe-rail { gap: 0.35rem; padding: 0.45rem 0.8rem; }
  .pr-stage { font-size: 0.62rem; gap: 0.25rem; }
  .pr-dot { width: 0.5rem; height: 0.5rem; }

  /* controls: chip rail becomes a full-width swipeable row above the buttons */
  .demo-controls { flex-wrap: wrap; justify-content: center; gap: 0.5rem; padding: 0.45rem 0.7rem 0.8rem; }
  .scene-dots {
    order: -1; flex: 1 1 100%;
    flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start;
    padding-bottom: 0.3rem; scrollbar-width: none;
  }
  .scene-dots::-webkit-scrollbar { display: none; }
  .ctl-btn { width: 2.5rem; height: 2.5rem; }
  .ctl-btn.primary { width: 2.9rem; height: 2.9rem; }

  .browser-body { padding: 0.8rem 0.7rem; }
  .bubble { max-width: 100%; }
  .mess-card { width: 100%; max-width: 18rem; }
  .stat { min-width: 8.4rem; flex: 1; }
  .phone { width: 100%; max-width: 16rem; }
  .toast { left: 0.8rem; right: 0.8rem; bottom: 0.8rem; font-size: 0.72rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}