html {
  scroll-behavior: smooth;
}

body {
  background: var(--nap-ink);
  color: var(--nap-text);
  font-family: var(--nap-font-human);
  font-size: 1rem;
  line-height: 1.6;
}

::selection {
  background: var(--nap-signal);
  color: var(--nap-ink);
}

a {
  color: var(--nap-signal);
}

a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--nap-playhead);
  outline-offset: 2px;
}

.navbar {
  background: var(--nap-panel);
  border-color: var(--nap-grid) !important;
}

.navbar-brand img {
  height: 30px;
  width: auto;
  display: block;
}

.navbar .nav-link {
  font-family: var(--nap-font-machine);
  font-size: 0.85rem;
  color: var(--nap-muted);
}

.navbar .nav-link:hover,
.navbar .nav-link:focus {
  color: var(--nap-text);
}

h2 {
  font-family: var(--nap-font-machine);
  font-weight: 600;
  color: var(--nap-text);
}

section {
  scroll-margin-top: 70px;
}

.panel,
.card {
  background: var(--nap-panel);
  border: 1px solid var(--nap-grid);
}

.card-title {
  font-family: var(--nap-font-machine);
  font-weight: 600;
  color: var(--nap-signal);
}

.btn-nap {
  background: var(--nap-signal);
  color: color-mix(in srgb, var(--nap-ink), var(--nap-signal) 10%);
  border: none;
}

.btn-nap:hover {
  filter: brightness(1.1);
  color: color-mix(in srgb, var(--nap-ink), var(--nap-signal) 10%);
}

.kbd-hint {
  color: var(--nap-muted);
  font-size: 0.78rem;
}

kbd {
  font-family: var(--nap-font-machine);
  background: color-mix(in srgb, var(--nap-text) 8%, var(--nap-panel));
  border: 1px solid var(--nap-grid);
  border-bottom-width: 3px;
  color: var(--nap-text);
}

.text-muted2 {
  color: var(--nap-muted);
}

.lead {
  color: var(--nap-muted);
}

.hero {
  position: relative;
  padding: 5.5rem 0 4.5rem;
  background:
    radial-gradient(circle, var(--nap-grid) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--nap-ink);
  border-bottom: 1px solid var(--nap-grid);
}

.hero-mark {
  display: block;
}

.hero-title {
  font-family: var(--nap-font-machine);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: clamp(2.8rem, 7vw, 4.6rem);
  line-height: 1;
  color: var(--nap-signal);
}

.hero-sub {
  font-family: var(--nap-font-machine);
  font-size: 1.1rem;
  letter-spacing: 0.14em;
  color: var(--nap-playhead);
}

.hero-sub a {
  color: inherit;
  text-decoration: none;
}

.hero-sub a:hover {
  text-decoration: underline;
}

.view-card {
  transition: border-color 0.15s, transform 0.15s;
}

.view-card:hover {
  border-color: var(--nap-signal);
  transform: translateY(-2px);
}

.demo {
  position: relative;
  height: 170px;
  margin-top: 0.75rem;
  border: 1px solid var(--nap-grid);
  border-radius: var(--nap-radius);
  background: var(--nap-ink);
  overflow: hidden;
}

.demo-meters {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  justify-content: center;
  height: 100%;
  padding: 0 16px 10px;
}

.demo-meters .meter {
  width: 16px;
  height: 85%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.demo-meters .meter-fill {
  width: 100%;
  height: 5%;
  background: var(--nap-signal);
  border-radius: 3px 3px 0 0;
  transition: height 0.1s linear;
}

.demo-meters .meter:nth-child(odd) .meter-fill {
  background: var(--nap-playhead);
}

/* F1 overview demo: song order + mixer strips */

.demo-mix {
  display: flex;
  gap: 8px;
  padding: 8px;
}

.mix-order {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 104px;
  flex: none;
  border-right: 1px solid var(--nap-grid);
  padding-right: 8px;
  overflow: hidden;
}

.mix-order .order-row {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 1px 5px;
  border-radius: 3px;
  cursor: pointer;
}

.mix-order .order-row.active {
  background: color-mix(in srgb, var(--nap-signal) 10%, transparent);
}

.mix-order .ord-num {
  font-family: var(--nap-font-machine);
  font-size: 0.68rem;
  color: var(--nap-muted);
  width: 2.4ch;
  text-align: right;
}

.mix-order .order-row.active .ord-num {
  color: var(--nap-signal);
  font-weight: 700;
}

.mix-order .ord-pat {
  font-family: var(--nap-font-machine);
  font-size: 0.68rem;
  color: var(--nap-text);
}

.mix-order .mix-total {
  margin-top: auto;
  padding-top: 4px;
}

.mix-strips {
  flex: 1;
  display: flex;
  gap: 8px;
  min-width: 0;
  overflow: hidden;
}

.demo-strip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  width: 62px;
  flex: none;
  padding: 6px 4px;
  background: color-mix(in srgb, var(--nap-text) 2%, transparent);
  border: 1px solid var(--nap-grid);
  border-radius: 6px;
  height: 100%;
}

.demo-strip .meter-track {
  flex: 1 1 auto;
  min-height: 0;
  width: 10px;
  background: color-mix(in srgb, var(--nap-text) 6%, var(--nap-panel));
  border-radius: 5px;
  position: relative;
  overflow: hidden;
}

.demo-strip .meter-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  background: var(--nap-signal);
  border-radius: 0 0 5px 5px;
}

.demo-strip .fx-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-family: var(--nap-font-machine);
  font-size: 0.55rem;
  color: var(--nap-muted);
  background: color-mix(in srgb, var(--nap-text) 6%, var(--nap-panel));
  border: 1px solid var(--nap-grid);
  border-radius: 3px;
  padding: 0 3px;
}

.demo-strip .fx-del {
  background: none;
  border: none;
  color: #e06c75;
  padding: 0;
  font-size: 0.7rem;
  line-height: 1;
}

.demo-strip .vol {
  writing-mode: vertical-lr;
  direction: rtl;
  width: 18px;
  height: 40px;
  flex: none;
  min-height: 0;
  margin: 0;
}

.demo-strip .pan {
  width: 100%;
  height: 10px;
  flex: none;
  min-height: 0;
  margin: 0;
}

.demo-grid {
  border-collapse: collapse;
  font-family: var(--nap-font-machine);
  font-size: 0.7rem;
  color: var(--nap-muted);
  margin: 8px;
  user-select: none;
}

.demo-grid td {
  padding: 1px 8px;
  white-space: pre;
}

.demo-grid td.rownum {
  opacity: 0.75;
  text-align: right;
}

.demo-grid tr.beat td {
  background: color-mix(in srgb, var(--nap-text) 3%, transparent);
}

.demo-grid tr.playing td {
  color: var(--nap-playhead);
  background: color-mix(in srgb, var(--nap-playhead) 8%, transparent);
}

.demo-grid tr.playing td.rownum {
  font-weight: 700;
  opacity: 1;
}

.demo-node {
  position: absolute;
  min-width: 96px;
  background: var(--nap-panel);
  border: 1px solid var(--nap-grid);
  border-radius: 0.4rem;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

.demo-node .node-header {
  padding: 4px 8px;
  font-family: var(--nap-font-machine);
  font-size: 0.68rem;
  font-weight: 600;
  color: color-mix(in srgb, var(--nap-ink), var(--nap-signal) 10%);
  background: var(--nap-signal);
  border-radius: 0.35rem 0.35rem 0 0;
}

.demo-node.audio .node-header {
  background: var(--nap-playhead);
  color: color-mix(in srgb, var(--nap-ink), var(--nap-playhead) 10%);
}

.demo-node .node-body {
  padding: 3px 8px;
  font-family: var(--nap-font-machine);
  font-size: 0.62rem;
  color: var(--nap-muted);
}

.demo-node .port {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--nap-grid);
  border: 1px solid var(--nap-grid);
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.demo-node .port.in { left: -5px; }
.demo-node .port.out { right: -5px; }

.demo-wires {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.demo-timeline {
  position: absolute;
  inset: 8px;
}

.demo-track {
  position: relative;
  height: 42px;
  border-bottom: 1px solid var(--nap-grid);
}

.demo-clip {
  position: absolute;
  top: 6px;
  bottom: 6px;
  border-radius: 3px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--nap-signal) 20%, transparent), color-mix(in srgb, var(--nap-signal) 7%, transparent));
  border: 1px solid var(--nap-signal);
  color: var(--nap-signal);
  font-family: var(--nap-font-machine);
  font-size: 0.62rem;
  padding: 1px 6px;
  overflow: hidden;
  white-space: nowrap;
}

.demo-clip.video {
  background: linear-gradient(180deg, color-mix(in srgb, var(--nap-playhead) 20%, transparent), color-mix(in srgb, var(--nap-playhead) 7%, transparent));
  border-color: var(--nap-playhead);
  color: var(--nap-playhead);
}

.demo-playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--nap-playhead);
  left: 0;
  pointer-events: none;
}

/* F5 output demo: composite with mesh mapping + video wall */

.demo-out {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px;
}

.out-source {
  position: relative;
  flex: 1;
  min-height: 0;
  border: 1px solid var(--nap-grid);
  border-radius: var(--nap-radius);
  background: var(--nap-panel);
  overflow: hidden;
}

.out-tag {
  position: absolute;
  top: 5px;
  left: 7px;
  z-index: 2;
  font-family: var(--nap-font-machine);
  font-size: 0.62rem;
  color: var(--nap-muted);
  pointer-events: none;
}

.out-content {
  position: absolute;
  inset: 0;
}

.oc {
  position: absolute;
  background: color-mix(in srgb, var(--nap-signal) 14%, transparent);
  border: 1px solid var(--nap-signal);
  border-radius: 3px;
}

.oc-a { left: 10%; top: 22%; width: 20%; height: 50%; }
.oc-b { left: 38%; top: 48%; width: 24%; height: 30%; }
.oc-c { left: 72%; top: 16%; width: 14%; height: 58%; }

.out-mesh {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.out-mesh path {
  stroke: var(--nap-signal);
  stroke-width: 1;
  opacity: 0.55;
  fill: none;
  vector-effect: non-scaling-stroke;
}

.out-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--nap-playhead);
  left: 0;
  z-index: 1;
  pointer-events: none;
}

.out-wall {
  display: flex;
  gap: 6px;
  height: 52px;
  flex: none;
}

.out-screen {
  position: relative;
  flex: 1;
  min-width: 0;
  border: 1px solid var(--nap-grid);
  border-radius: 3px;
  background: var(--nap-ink);
  overflow: hidden;
}

.out-video {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 400%;
}

/* cluster section: one ui seat, many core machines, rendered in three.js */

.stage3d {
  position: relative;
  height: 480px;
  overflow: hidden;
  background: var(--nap-ink);
  touch-action: none;
}

.stage3d canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

.stage3d canvas:active {
  cursor: grabbing;
}

.path-chip {
  display: inline-block;
  font-family: var(--nap-font-machine);
  font-size: 0.72rem;
  color: var(--nap-signal);
  background: var(--nap-panel);
  border: 1px solid var(--nap-grid);
  border-radius: var(--nap-radius);
  padding: 0 8px;
}

.cluster-cap {
  margin-top: 14px;
  text-align: center;
}

@media (max-width: 767.98px) {
  .stage3d {
    height: 340px;
  }
}

.keycap {
  display: inline-block;
  min-width: 3rem;
  text-align: center;
  padding: 0.6rem 0.8rem;
  font-family: var(--nap-font-machine);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--nap-signal);
  background: color-mix(in srgb, var(--nap-text) 8%, var(--nap-panel));
  border: 1px solid var(--nap-grid);
  border-bottom-width: 3px;
  border-radius: var(--nap-radius);
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}

.keycap.pressed,
a:hover .keycap {
  background: var(--nap-signal);
  color: color-mix(in srgb, var(--nap-ink), var(--nap-signal) 10%);
  border-color: var(--nap-signal);
}

.tech-icon {
  font-size: 1.6rem;
  color: var(--nap-signal);
}

footer {
  background: var(--nap-panel);
  border-top: 1px solid var(--nap-grid);
  color: var(--nap-muted);
  font-family: var(--nap-font-machine);
  font-size: 0.85rem;
}

footer a {
  color: var(--nap-muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--nap-signal);
}

.signup .form-control {
  background: var(--nap-ink);
  border: 1px solid var(--nap-grid);
  color: var(--nap-text);
  font-family: var(--nap-font-machine);
}

.signup .form-control::placeholder {
  color: var(--nap-muted);
}

.signup .form-control:focus {
  background: var(--nap-ink);
  border-color: var(--nap-signal);
  color: var(--nap-text);
  box-shadow: none;
}

.captcha-box {
  background: var(--nap-ink);
  border: 1px solid var(--nap-grid);
  border-radius: var(--nap-radius);
  overflow: hidden;
  line-height: 0;
}

.captcha-box img {
  display: block;
}

.hp-field {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
}

#signup-msg.ok {
  color: var(--nap-signal);
}

#signup-msg.err {
  color: var(--nap-playhead);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .view-card, .keycap { transition: none; }
}