/* neekOS Remote — unified portal: public landing + tutorial styles.
   Layers on top of css/app.css (design tokens live there — do not redefine).
   Prefixes: .ld-* landing · .tut-* tutorials · role pills .role-manager/.role-host.
   No external assets, no fonts, no images. CSP-clean. */

/* ---------- [hidden] guard ----------
   app.css gives .btn / .stage-bar display:flex, which would silently override
   the HTML hidden attribute. This file loads after app.css, so at equal
   specificity this wins for the default state — while inline styles set by
   JS still win over it (both toggle idioms stay safe). */
[hidden] { display: none; }

/* ============================================================
   LANDING SHELL — scrolls itself; body overflow stays untouched
   ============================================================ */
.landing {
  position: fixed;
  inset: 0;
  overflow-y: auto;
  overflow-x: clip;
  z-index: 1;
  scroll-behavior: smooth;
  background:
    radial-gradient(1200px 700px at 12% -8%, rgba(124, 92, 255, 0.14), transparent 60%),
    radial-gradient(1000px 620px at 108% 4%, rgba(34, 211, 238, 0.10), transparent 55%),
    var(--ink-900);
}

/* ---------- ambient background ---------- */
.ld-bg { position: absolute; top: 0; left: 0; right: 0; height: 1200px; overflow: hidden; pointer-events: none; }
.ld-orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; }
.ld-orb.a {
  width: 560px; height: 560px; top: -180px; left: -140px;
  background: radial-gradient(circle at 35% 35%, rgba(124, 92, 255, 0.34), transparent 70%);
  animation: ld-drift-a 26s ease-in-out infinite alternate;
}
.ld-orb.b {
  width: 640px; height: 640px; top: 60px; right: -220px;
  background: radial-gradient(circle at 60% 40%, rgba(34, 211, 238, 0.22), transparent 70%);
  animation: ld-drift-b 32s ease-in-out infinite alternate;
}
@keyframes ld-drift-a { from { transform: translate(0, 0); } to { transform: translate(70px, 50px); } }
@keyframes ld-drift-b { from { transform: translate(0, 0); } to { transform: translate(-60px, 70px); } }
.ld-gridlines {
  position: absolute; inset: 0;
  background:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(900px 620px at 50% 0%, #000 30%, transparent 78%);
          mask-image: radial-gradient(900px 620px at 50% 0%, #000 30%, transparent 78%);
}

/* ============================================================
   TOPNAV — sticky glass
   ============================================================ */
.ld-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(6, 8, 15, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.ld-nav-in {
  max-width: 1140px; margin: 0 auto;
  display: flex; align-items: center; gap: 26px;
  padding: 12px 24px;
}
.ld-brand { display: flex; align-items: center; gap: 11px; color: var(--txt); }
.ld-brand .logo { width: 32px; height: 32px; flex: none; }
.ld-brand .nm { font-weight: 700; font-size: 15.5px; letter-spacing: -0.01em; line-height: 1.15; }
.ld-brand .nm small { display: block; font-weight: 600; font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--txt-3); }
.ld-links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.ld-links a { color: var(--txt-2); font-size: 13.5px; font-weight: 500; transition: color .15s; }
.ld-links a:hover { color: var(--txt); }
.ld-nav-in > .btn { margin-left: 8px; }

/* ============================================================
   HERO
   ============================================================ */
.ld-hero { position: relative; }
.ld-hero-in {
  max-width: 1140px; margin: 0 auto;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
  padding: 84px 24px 76px;
}
.ld-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--txt-2); margin-bottom: 18px;
}
.ld-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-grad); flex: none; }
.ld-hero-copy h1 {
  margin: 0 0 18px;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.06; letter-spacing: -0.035em; font-weight: 800;
}
.ld-grad {
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.ld-sub { margin: 0 0 26px; max-width: 540px; color: var(--txt-2); font-size: 16px; line-height: 1.7; }
.ld-sub b { color: var(--txt); }
.ld-cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.ld-lg { padding: 13px 22px; font-size: 15px; border-radius: 12px; }
.ld-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.ld-chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; font-weight: 600; color: var(--txt-2);
  padding: 6px 12px; border: 1px solid var(--line-2); border-radius: 999px;
  background: rgba(12, 16, 25, 0.55);
}
.ld-chip i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-grad); flex: none; }

/* ---------- pure-CSS console mock ---------- */
.ld-hero-visual { min-width: 0; }
.ld-mock {
  border: 1px solid var(--line-2); border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(21, 27, 40, 0.92), rgba(9, 12, 21, 0.94));
  box-shadow: var(--shadow-glow);
  overflow: hidden;
  animation: ld-float 7s ease-in-out infinite alternate;
}
@keyframes ld-float { from { transform: translateY(0); } to { transform: translateY(-10px); } }
.ld-mock-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px; border-bottom: 1px solid var(--line);
  background: rgba(6, 8, 15, 0.6);
}
.ld-mock-bar .d { width: 10px; height: 10px; border-radius: 50%; flex: none; opacity: .85; }
.ld-mock-bar .d.r { background: #F87171; } .ld-mock-bar .d.y { background: #FBBF24; } .ld-mock-bar .d.g { background: #34D399; }
.ld-mock-url {
  flex: 1; margin: 0 10px; text-align: center;
  font-family: var(--mono); font-size: 11.5px; color: var(--txt-3);
  background: var(--ink-800); border: 1px solid var(--line); border-radius: 8px;
  padding: 5px 10px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ld-mock-lock {
  display: inline-flex; align-items: center; gap: 5px; flex: none;
  font-size: 10px; font-weight: 800; letter-spacing: 0.08em; color: var(--ok);
  background: rgba(52, 211, 153, 0.1); border: 1px solid rgba(52, 211, 153, 0.3);
  border-radius: 999px; padding: 3px 9px;
}
.ld-mock-lock svg { width: 11px; height: 11px; }
.ld-mock-body { display: grid; grid-template-columns: 118px 1fr; }
.ld-mock-side { display: flex; flex-direction: column; gap: 9px; padding: 14px 12px; border-right: 1px solid var(--line); }
.ld-mock-side .row { display: flex; align-items: center; gap: 7px; padding: 6px 7px; border-radius: 7px; }
.ld-mock-side .row i { width: 9px; height: 9px; border-radius: 3px; background: var(--ink-600); flex: none; }
.ld-mock-side .row b { height: 6px; border-radius: 4px; background: var(--ink-600); flex: 1; }
.ld-mock-side .row.on { background: var(--accent-grad-soft); box-shadow: inset 0 0 0 1px rgba(124, 92, 255, 0.25); }
.ld-mock-side .row.on i { background: var(--accent-grad); }
.ld-mock-side .row.on b { background: rgba(234, 240, 251, 0.4); }
.ld-mock-side .gap { height: 1px; background: var(--line); margin: 3px 2px; }
.ld-mock-stage { padding: 14px; display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.ld-mock-screen {
  position: relative; aspect-ratio: 16 / 9; border-radius: 10px; overflow: hidden;
  border: 1px solid var(--line-2);
  background:
    radial-gradient(320px 180px at 60% 30%, rgba(124, 92, 255, 0.16), transparent 70%),
    radial-gradient(260px 160px at 25% 80%, rgba(34, 211, 238, 0.10), transparent 70%),
    #04060B;
}
.ld-mock-live {
  position: absolute; top: 10px; left: 10px; z-index: 2;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 10px; font-weight: 700; color: var(--ok);
  background: rgba(9, 12, 21, 0.8); border: 1px solid rgba(52, 211, 153, 0.3);
  border-radius: 999px; padding: 4px 9px;
}
.ld-mock-live i { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); animation: pulse 2.4s infinite; }
.ld-mock-win {
  position: absolute; top: 26%; left: 12%; width: 46%; height: 46%;
  border-radius: 8px; border: 1px solid var(--line-2);
  background: linear-gradient(180deg, rgba(27, 34, 49, 0.95), rgba(16, 21, 31, 0.95));
  box-shadow: 0 14px 30px -14px rgba(0, 0, 0, 0.8);
}
.ld-mock-win::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 16px;
  border-bottom: 1px solid var(--line); background: rgba(6, 8, 15, 0.5);
  border-radius: 8px 8px 0 0;
}
.ld-mock-win::after {
  content: ""; position: absolute; left: 12%; top: 34%; width: 62%; height: 7px;
  border-radius: 4px; background: var(--ink-600);
  box-shadow: 0 14px 0 0 var(--ink-600), 0 28px 0 0 rgba(35, 44, 62, 0.6);
}
.ld-mock-win.b { top: 40%; left: 44%; width: 42%; height: 40%; }
.ld-mock-cursor {
  position: absolute; z-index: 2; top: 56%; left: 58%; width: 0; height: 0;
  border-left: 8px solid var(--txt); border-right: 5px solid transparent;
  border-bottom: 13px solid transparent; border-top: 4px solid transparent;
  transform: rotate(-8deg);
  filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.7));
  animation: ld-cursor 9s ease-in-out infinite alternate;
}
@keyframes ld-cursor { 0% { top: 56%; left: 58%; } 45% { top: 38%; left: 30%; } 100% { top: 62%; left: 70%; } }
.ld-mock-caption { font-family: var(--mono); font-size: 10.5px; color: var(--txt-3); text-align: center; letter-spacing: 0.03em; }

/* ============================================================
   SECTIONS
   ============================================================ */
.ld-sec { max-width: 1140px; margin: 0 auto; padding: 68px 24px; scroll-margin-top: 76px; }
.ld-sec-head { max-width: 680px; margin-bottom: 38px; }
.ld-sec-head h2 { margin: 0 0 12px; font-size: clamp(26px, 3.2vw, 36px); letter-spacing: -0.03em; line-height: 1.12; }
.ld-sec-head p { margin: 0; color: var(--txt-2); font-size: 15px; line-height: 1.7; }

/* ---------- features ---------- */
.ld-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.ld-card {
  padding: 24px 22px;
  background: linear-gradient(180deg, rgba(18, 23, 34, 0.7), rgba(12, 16, 25, 0.7));
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color .18s, transform .18s, box-shadow .18s;
}
.ld-card:hover { border-color: rgba(124, 92, 255, 0.35); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.ld-card .ic {
  width: 42px; height: 42px; border-radius: 11px; margin-bottom: 16px;
  background: var(--accent-grad-soft); border: 1px solid rgba(124, 92, 255, 0.25);
  display: grid; place-items: center;
}
.ld-card .ic svg { width: 21px; height: 21px; color: var(--cyan); }
.ld-card h3 { margin: 0 0 8px; font-size: 15.5px; letter-spacing: -0.01em; }
.ld-card p { margin: 0; color: var(--txt-2); font-size: 13.5px; line-height: 1.65; }

/* ---------- security ---------- */
.ld-points { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin-bottom: 22px; }
.ld-point {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 20px;
  background: linear-gradient(180deg, rgba(18, 23, 34, 0.7), rgba(12, 16, 25, 0.7));
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.ld-point .ck {
  width: 26px; height: 26px; flex: none; border-radius: 8px;
  background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.3);
  display: grid; place-items: center; color: var(--ok); margin-top: 1px;
}
.ld-point .ck svg { width: 14px; height: 14px; }
.ld-point b { display: block; font-size: 14px; margin-bottom: 5px; letter-spacing: -0.01em; }
.ld-point p { margin: 0; color: var(--txt-2); font-size: 13px; line-height: 1.65; }
.ld-specstrip {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px;
  padding: 14px 18px;
  background: rgba(6, 8, 15, 0.6); border: 1px solid var(--line-2); border-radius: 12px;
}
.ld-specstrip .k {
  font-size: 10px; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  margin-right: 4px;
}
.ld-specstrip .s { font-family: var(--mono); font-size: 12px; color: var(--txt-2); white-space: nowrap; }
.ld-specstrip .sep { color: var(--txt-3); }

/* ---------- how it works ---------- */
.ld-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.ld-step {
  position: relative; padding: 26px 22px;
  background: linear-gradient(180deg, rgba(18, 23, 34, 0.7), rgba(12, 16, 25, 0.7));
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  overflow: hidden;
}
.ld-step::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--accent-grad); opacity: .7;
}
.ld-step .n {
  display: block; font-size: 42px; font-weight: 800; line-height: 1; margin-bottom: 14px;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.ld-step h3 { margin: 0 0 8px; font-size: 16px; letter-spacing: -0.01em; }
.ld-step p { margin: 0; color: var(--txt-2); font-size: 13.5px; line-height: 1.65; }

/* ---------- roles ---------- */
.ld-roles { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.ld-role {
  padding: 22px;
  background: linear-gradient(180deg, rgba(18, 23, 34, 0.7), rgba(12, 16, 25, 0.7));
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  transition: border-color .18s, transform .18s;
}
.ld-role:hover { border-color: var(--line-2); transform: translateY(-3px); }
.ld-role .role-pill { display: inline-block; margin-bottom: 14px; }
.ld-role h3 { margin: 0 0 8px; font-size: 15px; letter-spacing: -0.01em; }
.ld-role p { margin: 0; color: var(--txt-2); font-size: 13px; line-height: 1.65; }
.ld-roles-note { margin: 22px 0 0; text-align: center; color: var(--txt-3); font-size: 12.5px; }

/* role pills beyond app.css (match role-pill idiom) */
.role-manager { color: #6EE7B7; background: rgba(52, 211, 153, 0.16); }
.role-host { color: #F0ABFC; background: rgba(232, 121, 249, 0.14); }

/* ---------- tutorials teaser ---------- */
.ld-teaser-sec { padding-top: 20px; padding-bottom: 20px; }
.ld-teaser {
  display: flex; align-items: center; gap: 28px;
  padding: 30px 32px;
  background: var(--accent-grad-soft);
  border: 1px solid rgba(124, 92, 255, 0.3); border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.ld-teaser .tx { flex: 1; min-width: 0; }
.ld-teaser h2 { margin: 0 0 8px; font-size: 20px; letter-spacing: -0.02em; }
.ld-teaser p { margin: 0; color: var(--txt-2); font-size: 13.5px; line-height: 1.65; max-width: 640px; }
.ld-teaser .btn { flex: none; }

/* ---------- CTA band ---------- */
.ld-cta { max-width: 1140px; margin: 0 auto; padding: 48px 24px 84px; }
.ld-cta-in {
  position: relative; text-align: center; padding: 56px 30px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(18, 23, 34, 0.85), rgba(9, 12, 21, 0.9)) padding-box,
    var(--accent-grad) border-box;
  border: 1px solid transparent;
  box-shadow: var(--shadow-glow);
  overflow: hidden;
}
.ld-cta-in::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(560px 260px at 50% -30%, rgba(124, 92, 255, 0.22), transparent 70%);
}
.ld-cta-in h2 { position: relative; margin: 0 0 10px; font-size: clamp(24px, 3vw, 34px); letter-spacing: -0.03em; }
.ld-cta-in p { position: relative; margin: 0 auto 26px; max-width: 520px; color: var(--txt-2); font-size: 14.5px; line-height: 1.7; }
.ld-cta-in .btn { position: relative; }

/* ---------- landing footer ---------- */
.ld-foot { border-top: 1px solid var(--line); background: rgba(6, 8, 15, 0.6); }
.ld-foot-in {
  max-width: 1140px; margin: 0 auto; padding: 30px 24px 38px;
  display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center;
}
.ld-foot-brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 14px; }
.ld-foot-brand .logo { width: 24px; height: 24px; }
.ld-foot-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 20px; }
.ld-foot-links a { color: var(--txt-2); font-size: 12.5px; }
.ld-foot-links a:hover { color: var(--txt); }
.ld-foot-legal { font-size: 11.5px; color: var(--txt-3); }
.ld-foot-legal a { color: var(--txt-2); }

/* ---------- auth extras ---------- */
.ld-signin-note { margin: 14px 0 0; font-size: 12px; color: var(--txt-3); line-height: 1.6; }
.ld-signin-note b { color: var(--txt-2); }
#authBack { margin: -6px 0 10px; font-size: 13px; }

/* ============================================================
   APP-SHELL SCROLL FIX (portal only)
   app.css sizes .app as a 100vh grid but leaves the implicit row
   free to grow with content; with body{overflow:hidden} tall static
   pages (Tutorials) would clip unscrollably. Constrain the row and
   let .content own the scroll, as intended.
   ============================================================ */
.app.on { grid-template-rows: minmax(0, 1fr); }
.app.on .main { min-height: 0; }
.app.on .content { min-height: 0; }

/* ============================================================
   TUTORIALS (inside app shell)
   ============================================================ */
.tut-tabs {
  display: inline-flex; gap: 6px;
  background: var(--ink-800); padding: 5px; border-radius: 12px;
  border: 1px solid var(--line); margin-bottom: 22px;
}
.tut-tabs button {
  padding: 9px 20px; border: none; background: transparent;
  color: var(--txt-2); border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background .12s, color .12s;
}
.tut-tabs button:hover { color: var(--txt); }
.tut-tabs button.on { color: var(--txt); background: var(--ink-650); box-shadow: inset 0 0 0 1px var(--line-2); }

.tut-panel { display: none; }
.tut-panel.on { display: block; animation: fade .2s ease; }

/* ---------- video slot: responsive 16:9, accent gradient border ---------- */
.tut-video {
  position: relative; aspect-ratio: 16 / 9;
  max-width: 820px; margin-bottom: 24px;
  border-radius: var(--radius-lg); overflow: hidden;
  background:
    linear-gradient(180deg, rgba(16, 21, 31, 0.96), rgba(9, 12, 21, 0.98)) padding-box,
    var(--accent-grad) border-box;
  border: 1px solid transparent;
  box-shadow: var(--shadow);
}
.tut-video video, .tut-video iframe {
  position: absolute; inset: 0; width: 100%; height: 100%;
  border: 0; object-fit: cover; background: #000;
}
.tut-ph {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 7px; text-align: center; padding: 20px;
  background:
    radial-gradient(420px 220px at 50% 30%, rgba(124, 92, 255, 0.12), transparent 70%),
    radial-gradient(360px 200px at 70% 80%, rgba(34, 211, 238, 0.07), transparent 70%);
}
.tut-ph .ic {
  width: 56px; height: 56px; border-radius: 15px; margin-bottom: 10px;
  background: var(--accent-grad-soft); border: 1px solid rgba(124, 92, 255, 0.3);
  display: grid; place-items: center;
}
.tut-ph .ic svg { width: 26px; height: 26px; color: var(--cyan); }
.tut-ph b { font-size: 15px; letter-spacing: -0.01em; }
.tut-ph p { margin: 0; font-size: 12.5px; color: var(--txt-3); }

/* ---------- tutorial content ---------- */
.tut-quick { max-width: 820px; margin-bottom: 26px; }
.tut-quick h3 { margin: 0 0 6px; }
.tut-sec { max-width: 820px; margin-top: 28px; }
.tut-sec h3, .tut-quick h3 { font-size: 15px; letter-spacing: -0.01em; margin-bottom: 10px; }
.tut-sec > h3 {
  padding-bottom: 8px; border-bottom: 1px solid var(--line); margin: 0 0 12px;
}
.tut-p { margin: 0; color: var(--txt-2); font-size: 13.5px; line-height: 1.75; }
.tut-p + .tut-p { margin-top: 8px; }
.tut-sec b, .tut-quick b, .tut-sec strong { color: var(--txt); }

ol.tut-steps { margin: 0; padding-left: 22px; }
ol.tut-steps li { margin: 8px 0; color: var(--txt-2); font-size: 13.5px; line-height: 1.75; }
ol.tut-steps li::marker { color: var(--violet); font-weight: 700; }

/* kbd-style chip for UI labels */
.tut-chip {
  display: inline-block; padding: 1px 8px 2px; margin: 0 1px;
  font-family: var(--mono); font-size: 12px; color: var(--txt); white-space: nowrap;
  background: var(--ink-700); border: 1px solid var(--line-2); border-bottom-width: 2px;
  border-radius: 6px; vertical-align: baseline;
}

/* info callout */
.tut-note { border-left: 3px solid var(--cyan); margin-top: 14px; }
.tut-note b { display: block; font-size: 13.5px; margin-bottom: 8px; }

/* role guide list */
.tut-roles { list-style: none; margin: 0; padding: 0; }
.tut-roles li { display: flex; align-items: center; gap: 10px; margin: 7px 0; color: var(--txt-2); font-size: 13px; line-height: 1.6; }
.tut-roles .role-pill { flex: none; min-width: 74px; text-align: center; }

/* "cannot do" list */
.tut-cannot { list-style: none; margin: 0 0 12px; padding: 0; }
.tut-cannot li {
  position: relative; margin: 7px 0; padding: 9px 14px 9px 36px;
  color: var(--txt-2); font-size: 13.5px; line-height: 1.6;
  background: rgba(248, 113, 113, 0.05); border: 1px solid rgba(248, 113, 113, 0.18);
  border-radius: 10px;
}
.tut-cannot li::before {
  content: "✕"; position: absolute; left: 14px; top: 9px;
  color: var(--err); font-weight: 700; font-size: 12px;
}

/* good-to-know list */
.tut-notes-list { list-style: none; margin: 0; padding: 0; }
.tut-notes-list li {
  position: relative; margin: 7px 0; padding: 9px 14px 9px 36px;
  color: var(--txt-2); font-size: 13.5px; line-height: 1.6;
  background: rgba(34, 211, 238, 0.05); border: 1px solid rgba(34, 211, 238, 0.16);
  border-radius: 10px;
}
.tut-notes-list li::before {
  content: "◆"; position: absolute; left: 14px; top: 9px;
  color: var(--cyan); font-size: 11px;
}

/* troubleshooting list */
.tut-trouble { list-style: none; margin: 0; padding: 0; }
.tut-trouble li {
  margin: 8px 0; padding: 11px 14px;
  color: var(--txt-2); font-size: 13.5px; line-height: 1.65;
  background: var(--ink-800); border: 1px solid var(--line);
  border-left: 3px solid var(--warn); border-radius: 10px;
}
.tut-trouble li b { color: var(--txt); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 980px) {
  .ld-hero-in { grid-template-columns: 1fr; gap: 44px; padding-top: 60px; }
  .ld-hero-visual { max-width: 620px; }
  .ld-steps { grid-template-columns: 1fr; }
  .ld-teaser { flex-direction: column; align-items: flex-start; gap: 18px; }
}
@media (max-width: 760px) {
  .ld-links { display: none; }
  .ld-nav-in { gap: 12px; }
  .ld-nav-in > .btn { margin-left: auto; }
  .ld-sec { padding: 48px 18px; }
  .ld-hero-in { padding: 48px 18px 56px; }
  .ld-cta { padding: 32px 18px 64px; }
  .ld-cta-in { padding: 42px 20px; }
}
@media (max-width: 480px) {
  .ld-brand .nm small { display: none; }
  .ld-hero-copy h1 { font-size: 31px; }
  .ld-sub { font-size: 14.5px; }
  .ld-cta-row .btn { width: 100%; }
  .ld-mock-body { grid-template-columns: 1fr; }
  .ld-mock-side { flex-direction: row; border-right: none; border-bottom: 1px solid var(--line); padding: 10px 12px; }
  .ld-mock-side .row b { width: 26px; flex: none; }
  .ld-mock-side .gap { display: none; }
  .ld-specstrip .s { white-space: normal; }
  .tut-tabs { display: flex; }
  .tut-tabs button { flex: 1; padding: 9px 6px; font-size: 12px; }
  .tut-ph .ic { width: 44px; height: 44px; margin-bottom: 6px; }
  .tut-ph b { font-size: 13px; }
  .tut-ph p { font-size: 11.5px; }
}

/* ============================================================
   REDUCED MOTION — kill all landing/tutorial animation
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .landing { scroll-behavior: auto; }
  .landing *, .landing *::before, .landing *::after,
  .tut-panel, .tut-panel * {
    animation: none !important;
    transition: none !important;
  }
}