/* ============================================================
   plateau-route-3d · Landing
   Aesthetic: Aerospace Mission Console
   ============================================================ */

:root {
  --bg:          #070a0f;
  --bg-2:        #0d1320;
  --surface:     rgba(15, 21, 30, 0.78);
  --surface-2:   rgba(24, 32, 44, 0.92);
  --border:      rgba(148, 163, 184, 0.14);
  --border-2:    rgba(148, 163, 184, 0.28);
  --ink:         #e6edf5;
  --ink-mu:      #94a3b8;
  --ink-dim:     #64748b;
  --accent:      #3b82f6;
  --accent-a:    #e879f9;
  --accent-b:    #e879f9;

  --font-jp:   "Zen Kaku Gothic New", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --radius:   14px;
  --radius-sm: 10px;
  --container-w: 1120px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.7;
  color-scheme: dark;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

a { color: inherit; }
img, svg { display: block; max-width: 100%; }

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  min-height: 100dvh;
  padding: 20px 24px 60px;
  padding-top: calc(20px + env(safe-area-inset-top));
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  overflow: hidden;
  background: radial-gradient(ellipse at top, #0d1320 0%, #070a0f 55%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.grid-overlay {
  position: absolute;
  inset: -2px;
  background:
    linear-gradient(to right, rgba(148, 163, 184, 0.04) 1px, transparent 1px) 0 0/64px 64px,
    linear-gradient(to bottom, rgba(148, 163, 184, 0.04) 1px, transparent 1px) 0 0/64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 40%, transparent 85%);
}
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  will-change: transform;
}
.glow-a {
  width: 420px; height: 420px;
  background: radial-gradient(circle, #0891b2, transparent 70%);
  top: -120px; left: -120px;
}
.glow-b {
  width: 460px; height: 460px;
  background: radial-gradient(circle, #a21caf, transparent 70%);
  bottom: -140px; right: -140px;
}

.topnav {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--container-w);
  margin: 0 auto;
}

.brand-card {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 10px;
  background: rgba(15, 21, 30, 0.5);
  border: 1px solid var(--border);
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink);
  transition: border-color .15s, background .15s;
}
.brand-card:hover,
.brand-card:focus-visible {
  border-color: var(--border-2);
  background: rgba(24, 32, 44, 0.7);
}
.brand-card:focus-visible { outline: 2px solid var(--accent-a); outline-offset: 2px; }
.brand-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-a);
  box-shadow: 0 0 10px var(--accent-a);
}
.brand-text { display: inline-flex; flex-direction: column; line-height: 1; }
.brand-prefix {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.brand-name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-top: 2px;
}
.brand-arrow { opacity: 0.6; transition: transform .15s, opacity .15s; }
.brand-card:hover .brand-arrow { opacity: 1; transform: translate(1px, -1px); }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--ink-mu);
  border-radius: 999px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  transition: color .15s, border-color .15s;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ink);
  border-color: var(--border-2);
}
.nav-link:focus-visible { outline: 2px solid var(--accent-a); outline-offset: 2px; }

/* Hero inner */
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin: 72px auto 0;
  text-align: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(34, 211, 238, 0.06);
  border: 1px solid rgba(34, 211, 238, 0.25);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent-a);
  text-transform: uppercase;
}
.kicker-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-a);
  box-shadow: 0 0 8px var(--accent-a);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .35; }
}

.hero-title {
  margin: 24px 0 20px;
  font-size: clamp(2.1rem, 6.2vw, 4.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.title-line { display: block; }
.title-accent {
  background: linear-gradient(90deg, var(--accent-a), var(--accent-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  max-width: 640px;
  margin: 0 auto;
  color: var(--ink-mu);
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  line-height: 1.8;
  text-wrap: pretty;
}

/* Route SVG visualization */
.hero-visual {
  max-width: 640px;
  margin: 40px auto 36px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(24, 32, 44, 0.4), rgba(15, 21, 30, 0.6));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
.route-diagram { width: 100%; height: auto; }

.route-solid {
  stroke-dasharray: 800;
  stroke-dashoffset: 800;
  animation: draw-route 3s ease-out forwards;
}
@keyframes draw-route {
  to { stroke-dashoffset: 0; }
}

.drone {
  animation: drone-fly 8s ease-in-out 3s infinite;
  offset-path: path("M 60 160 Q 120 100 180 80 Q 240 60 300 40 Q 360 60 420 100 Q 480 90 540 70");
  offset-rotate: auto;
}
@keyframes drone-fly {
  0%   { offset-distance: 0%; opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .route-solid { animation: none; stroke-dashoffset: 0; }
  .drone { animation: none; offset-distance: 50%; opacity: 1; }
  .kicker-dot { animation: none; }
}

/* CTA */
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-family: var(--font-jp);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s, background .15s, border-color .15s, box-shadow .15s;
  touch-action: manipulation;
  min-height: 48px;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent-a); outline-offset: 3px; }

.btn-primary {
  background: linear-gradient(180deg, #06b6d4, #0891b2);
  color: #02131a;
  box-shadow: 0 1px 0 rgba(255,255,255,0.2) inset, 0 10px 30px rgba(34, 211, 238, 0.28);
}
.btn-primary:hover {
  background: linear-gradient(180deg, #e879f9, #06b6d4);
  box-shadow: 0 1px 0 rgba(255,255,255,0.25) inset, 0 12px 36px rgba(34, 211, 238, 0.38);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border-2);
}
.btn-ghost:hover {
  background: rgba(148, 163, 184, 0.08);
  border-color: rgba(148, 163, 184, 0.45);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 28px;
  padding: 16px 8px 0;
  border-top: 1px solid var(--border);
  max-width: 720px;
  margin: 0 auto;
}
.meta-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.meta-k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.meta-v {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

/* ============================================================
   SECTION
   ============================================================ */

.sec {
  padding: 88px 24px;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  border-top: 1px solid var(--border);
}
.sec-dark {
  background: linear-gradient(180deg, #080b12 0%, #0d1320 100%);
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
}

.sec-head {
  max-width: 720px;
  margin-bottom: 48px;
}
.sec-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent-a);
  text-transform: uppercase;
  margin-bottom: 10px;
  padding: 3px 10px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.24);
  border-radius: 999px;
}
.sec h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 3.8vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.25;
  text-wrap: balance;
}
.sec-sub {
  margin: 0;
  color: var(--ink-mu);
  font-size: 1rem;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.step {
  padding: 24px;
  background: linear-gradient(180deg, rgba(24, 32, 44, 0.6) 0%, rgba(15, 21, 30, 0.4) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.step::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-a), transparent 70%);
  opacity: 0.7;
}
.step:nth-child(2)::before {
  background: linear-gradient(90deg, transparent, var(--accent-a), var(--accent-b), transparent);
}
.step:nth-child(3)::before {
  background: linear-gradient(90deg, transparent 30%, var(--accent-b));
}
.step-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.step h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.step p {
  margin: 0 0 16px;
  color: var(--ink-mu);
  font-size: 0.93rem;
  line-height: 1.7;
}
.step-visual {
  padding: 8px 4px;
  background: rgba(7, 10, 15, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* Features */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.feat {
  padding: 22px;
  background: rgba(24, 32, 44, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .15s, border-color .15s;
}
.feat:hover {
  border-color: var(--border-2);
  transform: translateY(-2px);
}
.feat-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.25);
  color: var(--accent-a);
  margin-bottom: 14px;
}
.feat h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
}
.feat p {
  margin: 0;
  color: var(--ink-mu);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ============================================================
   02·5 · MORE WAYS TO FLY (mission cards)
   ─ HUD トーンの 4 カード。.feat の派生で .feat--mission を載せる。
   ─ 上部に小さな LED + tag ピル、左上に 1px シアン or マゼンタ罫線。
   ============================================================ */

.feat-grid-mission {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.feat--mission {
  position: relative;
  padding-top: 18px;
  background:
    linear-gradient(180deg, rgba(15, 21, 30, 0.78) 0%, rgba(11, 16, 26, 0.62) 100%);
  overflow: hidden;
}
.feat--mission::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-a), transparent 70%);
  opacity: 0.85;
}
.feat--mission:nth-child(2)::before,
.feat--mission:nth-child(4)::before {
  background: linear-gradient(90deg, transparent 30%, var(--accent-b));
}
.feat--mission:hover {
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: 0 4px 18px rgba(34, 211, 238, 0.08);
}

.feat-mission-head {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.feat-led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-a);
  box-shadow: 0 0 8px var(--accent-a);
  animation: feat-led-pulse 2.4s ease-in-out infinite;
}
.feat-led-b {
  background: var(--accent-b);
  box-shadow: 0 0 8px var(--accent-b);
  animation-delay: 0.6s;
}
@keyframes feat-led-pulse {
  0%, 100% { opacity: 0.55; }
  50%      { opacity: 1; }
}

.feat-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent-a);
  text-transform: uppercase;
  padding: 3px 8px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.28);
  border-radius: 999px;
}
.feat-tag-b {
  color: var(--accent-b);
  background: rgba(232, 121, 249, 0.08);
  border-color: rgba(232, 121, 249, 0.28);
}

.feat-ico-b {
  background: rgba(232, 121, 249, 0.1);
  border-color: rgba(232, 121, 249, 0.28);
  color: var(--accent-b);
}

@media (prefers-reduced-motion: reduce) {
  .feat-led, .feat-led-b { animation: none; opacity: 0.85; }
}

/* ============================================================
   03 · CAMERA CONTROLS (HUD panel)
   ============================================================ */

.sec-controls {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(34, 211, 238, 0.06), transparent 60%),
    radial-gradient(ellipse at 100% 100%, rgba(232, 121, 249, 0.05), transparent 55%),
    linear-gradient(180deg, #080b12 0%, #0b1220 100%);
}

.hud-panel {
  position: relative;
  padding: 20px 22px 22px;
  background:
    linear-gradient(180deg, rgba(11, 18, 32, 0.9) 0%, rgba(7, 10, 15, 0.92) 100%);
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgba(34, 211, 238, 0.04) inset,
    0 24px 80px -40px rgba(34, 211, 238, 0.4);
  overflow: hidden;
}
.hud-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to right, rgba(148, 163, 184, 0.05) 1px, transparent 1px) 0 0/48px 48px,
    linear-gradient(to bottom, rgba(148, 163, 184, 0.04) 1px, transparent 1px) 0 0/48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 55%, transparent 95%);
  opacity: 0.6;
}
.hud-frame {
  position: absolute;
  inset: 8px;
  pointer-events: none;
  border-radius: 8px;
  background:
    linear-gradient(#e879f9, #e879f9) top left / 14px 1px no-repeat,
    linear-gradient(#e879f9, #e879f9) top left / 1px 14px no-repeat,
    linear-gradient(#e879f9, #e879f9) top right / 14px 1px no-repeat,
    linear-gradient(#e879f9, #e879f9) top right / 1px 14px no-repeat,
    linear-gradient(#e879f9, #e879f9) bottom left / 14px 1px no-repeat,
    linear-gradient(#e879f9, #e879f9) bottom left / 1px 14px no-repeat,
    linear-gradient(#e879f9, #e879f9) bottom right / 14px 1px no-repeat,
    linear-gradient(#e879f9, #e879f9) bottom right / 1px 14px no-repeat;
  opacity: 0.9;
}

.hud-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 12px 14px;
  border-bottom: 1px dashed rgba(148, 163, 184, 0.18);
  margin-bottom: 18px;
}
.hud-led {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #e879f9;
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2), 0 0 10px rgba(34, 211, 238, 0.65);
  animation: hud-pulse 1.6s ease-in-out infinite;
}
@keyframes hud-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.hud-mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ink-mu);
  text-transform: uppercase;
}
.hud-live {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--accent-a);
  padding: 2px 8px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.08);
}

.ctrl-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}
.ctrl {
  position: relative;
  padding: 16px 16px 14px;
  background: linear-gradient(180deg, rgba(24, 32, 44, 0.55), rgba(15, 21, 30, 0.35));
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color .2s, transform .2s;
}
.ctrl:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-2px);
}
.ctrl::before {
  content: "";
  position: absolute;
  top: 0; left: 14px; right: 14px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-a), transparent);
  opacity: 0.55;
}
.ctrl header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.ctrl-name {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  margin-right: 8px;
}
.ctrl-mono {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.ctrl-value {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 500;
  color: var(--ink);
  font-feature-settings: "tnum";
  line-height: 1;
  letter-spacing: -0.02em;
}
.ctrl-unit {
  font-size: 0.82rem;
  color: var(--ink-mu);
  margin-left: 3px;
  font-weight: 400;
}
.ctrl-viz {
  width: 100%;
  height: 56px;
  background: rgba(7, 10, 15, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 6px;
}
.ctrl p {
  margin: 0;
  color: var(--ink-mu);
  font-size: 0.86rem;
  line-height: 1.65;
}
.ctrl footer {
  display: flex;
  align-items: center;
  padding-top: 6px;
  border-top: 1px dashed rgba(148, 163, 184, 0.12);
}
.ctrl-range {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

.hud-footer {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-top: 18px;
  padding: 12px 14px;
  background: rgba(34, 211, 238, 0.06);
  border: 1px dashed rgba(34, 211, 238, 0.28);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--ink-mu);
  line-height: 1.65;
}
.hud-footer .hud-mono {
  flex-shrink: 0;
  padding: 3px 8px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.32);
  color: var(--accent-a);
  border-radius: 4px;
  font-size: 10px;
  letter-spacing: 0.2em;
}

@media (max-width: 640px) {
  .hud-panel { padding: 14px 14px 16px; }
  .ctrl { padding: 14px 14px 12px; }
  .ctrl-value { font-size: 1.35rem; }
  .hud-footer { flex-direction: column; gap: 8px; }
}

/* ---- Free Look (mouse) section ---- */
.hud-led-b {
  background: #e879f9;
  box-shadow: 0 0 0 3px rgba(232, 121, 249, 0.2), 0 0 10px rgba(232, 121, 249, 0.65);
}
.hud-live-b {
  color: var(--accent-b, #e879f9);
  border-color: rgba(232, 121, 249, 0.4);
  background: rgba(232, 121, 249, 0.08);
}

.ctrl-grid-mouse {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.ctrl-badge {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--accent-a);
  padding: 3px 9px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.08);
  white-space: nowrap;
}
.ctrl-badge-b {
  color: #e879f9;
  border-color: rgba(232, 121, 249, 0.45);
  background: rgba(232, 121, 249, 0.1);
}

.ctrl-hero {
  border-color: rgba(232, 121, 249, 0.35);
  background: linear-gradient(180deg, rgba(40, 24, 48, 0.55), rgba(24, 16, 30, 0.35));
  grid-column: span 2;
  box-shadow: 0 0 0 1px rgba(232, 121, 249, 0.1) inset, 0 20px 60px -30px rgba(232, 121, 249, 0.35);
}
.ctrl-hero::before {
  background: linear-gradient(90deg, transparent, #e879f9, transparent);
}
.ctrl-hero:hover {
  border-color: rgba(232, 121, 249, 0.6);
}
@media (max-width: 760px) {
  .ctrl-hero { grid-column: auto; }
}

.ctrl-viz-tall { height: 90px; }

.ctrl-range-b {
  color: #e879f9;
}

.hi-accent {
  color: var(--ink);
  background: linear-gradient(180deg, transparent 60%, rgba(232, 121, 249, 0.2) 60%);
  padding: 0 2px;
}

.ctrl kbd {
  display: inline-block;
  padding: 1px 7px;
  font-family: var(--font-mono);
  font-size: 0.8em;
  color: #e879f9;
  background: rgba(232, 121, 249, 0.12);
  border: 1px solid rgba(232, 121, 249, 0.45);
  border-bottom-width: 2px;
  border-radius: 4px;
  line-height: 1.3;
  vertical-align: baseline;
}

/* Badges */
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.badge {
  display: inline-block;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
  background: rgba(24, 32, 44, 0.7);
  border: 1px solid var(--border);
  border-radius: 999px;
  letter-spacing: 0.01em;
}

/* ============================================================
   FOOTER
   ============================================================ */

.foot {
  padding: 40px 24px calc(40px + env(safe-area-inset-bottom));
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  border-top: 1px solid var(--border);
  background: #060810;
}
.foot-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.foot-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-dim);
  flex-wrap: wrap;
}
.foot-meta a {
  color: var(--ink-mu);
  text-decoration: none;
  transition: color .15s;
}
.foot-meta a:hover,
.foot-meta a:focus-visible { color: var(--ink); }
.foot-meta a:focus-visible { outline: 2px solid var(--accent-a); outline-offset: 2px; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 640px) {
  .hero { padding: 16px 16px 48px; }
  .hero-inner { margin-top: 48px; }
  .hero-visual { margin: 32px auto 28px; padding: 12px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { width: 100%; }
  .hero-meta { gap: 8px 20px; }
  .sec { padding: 64px 20px; }
  .sec-head { margin-bottom: 32px; }
  .step { padding: 20px; }
  .topnav { flex-wrap: wrap; }
  .brand-prefix { display: none; }
  .foot-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 400px) {
  .hero-title { font-size: 1.85rem; }
  .nav-link span { display: none; }
  .nav-link { padding: 7px 10px; }
}

/* ============================================================
   Community Board (section 07)
   ============================================================ */
.board-actions { margin: 24px 0; display: flex; justify-content: center; }
.board-form {
  display: grid; gap: 12px;
  max-width: 640px; margin: 0 auto 32px;
  padding: 20px;
  background: rgba(15, 21, 30, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 12px;
}
.board-form label { display: grid; gap: 4px; font-size: 12px; color: var(--ink-mu, #94a3b8); letter-spacing: 0.04em; }
.board-form input, .board-form textarea {
  background: rgba(7, 10, 15, 0.6); color: var(--ink, #e6edf5);
  border: 1px solid rgba(148, 163, 184, 0.22); border-radius: 8px;
  padding: 10px 12px; font-family: inherit; font-size: 13px;
}
.board-form input:focus, .board-form textarea:focus { outline: none; border-color: var(--accent-a, #e879f9); }
.board-form textarea { resize: vertical; min-height: 60px; }
.board-form-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 4px; }
.board-error { color: var(--danger, #f43f5e); font-size: 12px; margin: 8px 0 0; }
.board-block { margin: 32px 0; }
.board-block h3 {
  font-size: 11px; color: var(--accent-b, #e879f9);
  letter-spacing: 0.08em; text-transform: uppercase;
  margin: 0 0 12px;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
}
.board-grid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.board-card {
  background: rgba(15, 21, 30, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 10px;
  padding: 14px 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.board-card.top { border-color: var(--accent-a, #e879f9); box-shadow: inset 0 0 0 1px var(--accent-a, #e879f9); }
.board-card .card-title {
  font-weight: 700; font-size: 14px; line-height: 1.35;
  color: var(--ink, #e6edf5);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.board-card .card-comment {
  font-size: 12px; color: var(--ink-mu, #94a3b8); line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.board-card .card-meta {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--ink-dim, #64748b);
  margin-top: auto; padding-top: 6px;
}
.board-card .card-actions { display: flex; gap: 8px; margin-top: 8px; }
.board-card .like-btn {
  background: transparent; color: var(--accent-b, #e879f9);
  border: 1px solid var(--accent-b, #e879f9);
  border-radius: 6px; padding: 5px 10px;
  font-size: 12px; cursor: pointer;
  font-family: var(--font-mono, monospace);
  transition: all 0.15s;
}
.board-card .like-btn:hover { background: rgba(232, 121, 249, 0.1); }
.board-card .like-btn.voted { background: var(--accent-b, #e879f9); color: var(--bg, #070a0f); }
.board-card .open-btn {
  background: var(--accent-a, #e879f9); color: var(--bg, #070a0f);
  text-decoration: none; border-radius: 6px; padding: 5px 10px;
  font-size: 12px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 4px;
  transition: opacity 0.15s;
}
.board-card .open-btn:hover { opacity: 0.85; }
#board-loadmore { display: block; margin: 16px auto 0; }
@media (max-width: 599px) {
  .board-grid { grid-template-columns: 1fr; }
}

/* ─── board card: composition badge ─────────────────────── */
.card-title-row { display: flex; align-items: center; gap: 0.5rem; }
.card-badge {
  font-size: 0.7em;
  padding: 0.15em 0.5em;
  border-radius: 3px;
  font-weight: bold;
  white-space: nowrap;
  flex-shrink: 0;
}
.badge-composition { background: #e879f9; color: #fff; }
.badge-preset { background: #e879f9; color: #0a0e14; }