/* ==========================================================================
   DuoSound Product Website Stylesheet
   Clean Apple Pure White Aesthetic : Interactive Audio Mixer
   ========================================================================== */

:root {
  --ink: #111111;
  --ink-secondary: #3a3a3c;
  --muted: #6e6e73;
  --line: #e8e8ed;
  --line-subtle: rgba(0, 0, 0, 0.05);
  --bg: #ffffff;
  --card: #fbfbfd;
  --accent-blue: #0071e3;
  --accent-purple: #9b51e0;
  --accent-mint: #34c759;
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-family);
  font-feature-settings: "cv11", "ss01";
  font-weight: 500;
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.stage {
  max-width: 780px;
  margin: 0 auto;
  padding: 110px 24px 72px;
}

/* Presence Counter Pill */
.presence-counter {
  position: relative;
  top: auto;
  right: auto;
  z-index: 1;
  margin: 0;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  cursor: default;
  user-select: none;
  transition: all 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  overflow: hidden;
}

.presence-counter:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.14);
}

.counter-content {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--ink);
}

.counter-live {
  font-weight: 500;
}

.counter-live strong {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
}

.presence-label {
  color: var(--muted);
  font-size: 12.5px;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34c759;
  box-shadow: 0 0 0 2.5px rgba(52, 199, 89, 0.24);
  animation: livePulse 2.4s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes livePulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(0.9);
  }
}

.counter-info {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  filter: blur(4px);
  transform: translateY(10px);
  pointer-events: none;
}

/* Top Navigation Bar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--line);
}

.topbar-actions {
  display: flex;
  align-items: center;
  margin-left: auto;
  flex-shrink: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.avatar-logo {
  border-radius: 50%;
  border: 1px solid var(--line);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.atlas-logo-mark {
  width: 22px;
  height: 22px;
  border-radius: 0;
  border: none;
  box-shadow: none;
  flex-shrink: 0;
}

.brand-name {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.015em;
}

.nav-divider {
  color: rgba(0, 0, 0, 0.22);
  font-weight: 400;
  font-size: 15px;
  margin: 0 2px;
}

.crumb-app {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--ink);
}

.crumb-icon {
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.crumb-name {
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.015em;
}

.app-logo {
  border-radius: 7px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.badge.os {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 8px;
  border-radius: 6px;
  background: #f0f0f4;
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  background: #f5f5f7;
  color: var(--ink-secondary);
  text-decoration: none;
  font-size: 12.5px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: all 0.2s ease;
}

.pill:hover {
  background: #e8e8ed;
  color: var(--ink);
}

.back-pill {
  font-weight: 600;
  color: var(--accent-blue);
  background: rgba(0, 113, 227, 0.06);
  border-color: rgba(0, 113, 227, 0.18);
}

/* Intro Section */
.intro {
  margin-bottom: 28px;
}

.pill-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 26px;
  padding: 0 11px;
  border-radius: var(--radius-pill);
  background: #f2f2f7;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.kicker-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-purple);
}

h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin: 0 0 16px;
  color: var(--ink);
}

.lede {
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-secondary);
  margin: 0;
}

/* CTAs */
.actions {
  margin-bottom: 48px;
}

.purchase-row {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 12px;
}

@media (max-width: 640px) {
  .purchase-row {
    flex-wrap: wrap;
  }
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.button.primary {
  background: var(--ink);
  color: #ffffff;
}

.button.primary:hover {
  background: #2a2a2e;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}

.button .amount {
  font-size: 12px;
  font-weight: 500;
  opacity: 0.72;
}

.brew-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: #f5f5f7;
  border: 1px solid var(--line);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  color: var(--ink);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.18s ease;
}

.brew-box:hover {
  background: #ebebee;
  border-color: rgba(0, 0, 0, 0.14);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-secondary);
  cursor: pointer;
  transition: all 0.18s ease;
}

.copy-btn:hover {
  background: var(--ink);
  color: #ffffff;
  border-color: var(--ink);
}

/* -------------------------------------------------------------
   Interactive Audio Simulator
   ------------------------------------------------------------- */
.figure {
  margin: 0 0 64px;
}

.simulator-card {
  background: var(--card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.04);
  padding: 24px;
  transition: all 0.3s ease;
}

.sim-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.sim-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mac-status-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--surface-alt);
  color: var(--accent);
  flex-shrink: 0;
}

#toneIcon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sim-title-group h3 {
  margin: 0 0 3px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sim-title-group p {
  margin: 0;
  font-size: 12.5px;
  color: var(--muted);
}

.sim-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.test-tone-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 14px;
  border-radius: var(--radius-pill);
  background: var(--accent-blue);
  color: #ffffff;
  border: none;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
}

.test-tone-btn:hover {
  background: #0077ed;
  transform: scale(1.02);
}

.test-tone-btn.playing {
  background: var(--accent-mint);
}

.hotkey-pill {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 10px;
  border-radius: 6px;
  background: #ffffff;
  border: 1px solid var(--line);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* Mixer Board */
.mixer-board {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  padding: 18px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.mixer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.mixer-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.active-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-mint);
  background: rgba(52, 199, 89, 0.10);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Device Row */
.device-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 12px;
  border-radius: var(--radius-md);
  margin-bottom: 8px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  flex-wrap: wrap;
  gap: 12px;
}

.device-row.active {
  background: #f9f9fc;
  border-color: rgba(0, 0, 0, 0.06);
}

.device-row:not(.active) {
  opacity: 0.65;
}

.device-checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.device-checkbox-wrap input {
  display: none;
}

.custom-check {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1.5px solid #d1d1d6;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.18s ease;
}

.device-checkbox-wrap input:checked + .custom-check {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

.device-checkbox-wrap input:checked + .custom-check::after {
  content: "";
  width: 5px;
  height: 9px;
  border: solid #ffffff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

.device-info {
  display: flex;
  flex-direction: column;
}

.device-name-line {
  display: flex;
  align-items: center;
  gap: 8px;
}

.device-name-line strong {
  font-size: 14px;
  color: var(--ink);
}

.transport-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  background: #f0f0f4;
  color: var(--muted);
}

.transport-tag.bluetooth {
  background: rgba(0, 113, 227, 0.08);
  color: var(--accent-blue);
}

.device-sample-rate {
  font-size: 12px;
  color: var(--muted);
}

.device-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Waveform Visualizer Bars */
.visualizer-bars {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
  height: 16px;
  width: 24px;
}

.vbar {
  width: 3px;
  border-radius: 2px;
  background: var(--accent-blue);
  animation: bounceBar 1.2s ease infinite alternate;
}

.vbar:nth-child(1) { height: 40%; animation-delay: 0.1s; }
.vbar:nth-child(2) { height: 90%; animation-delay: 0.3s; }
.vbar:nth-child(3) { height: 60%; animation-delay: 0.2s; }
.vbar:nth-child(4) { height: 75%; animation-delay: 0.4s; }

.visualizer-bars.inactive .vbar {
  animation: none;
  height: 20%;
  background: #d1d1d6;
}

@keyframes bounceBar {
  0% { height: 20%; }
  100% { height: 100%; }
}

.volume-slider {
  width: 100px;
  accent-color: var(--accent-blue);
}

.vol-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  width: 32px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Mixer Footer */
.mixer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.mixer-footer-left {
  display: flex;
  align-items: center;
  gap: 7px;
}

.drift-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-mint);
}

.drift-text {
  font-size: 12px;
  color: var(--muted);
}

.primary-toggle-btn {
  height: 32px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: #ffffff;
  border: none;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
}

.primary-toggle-btn:hover {
  background: #2a2a2e;
}

/* -------------------------------------------------------------
   Content Cards
   ------------------------------------------------------------- */
.stack {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.card {
  background: var(--card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  padding: 36px 32px;
}

.card h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  color: var(--ink);
}

dl {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

dt {
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}

dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

/* Specs Grid */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.spec-col {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.spec-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.spec-val {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.spec-val a {
  color: var(--accent-blue);
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-all;
}

/* Developer Card */
.dev-flex {
  display: flex;
  align-items: center;
  gap: 18px;
}

.dev-avatar {
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.dev-text h3 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 700;
}

.dev-text p {
  margin: 0 0 10px;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.5;
}

.dev-links {
  display: flex;
  gap: 12px;
}

.dev-link {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent-blue);
  text-decoration: none;
}

.dev-link:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 12px;
}

footer .links {
  display: flex;
  gap: 16px;
}

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

footer .links a:hover {
  color: var(--ink);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .topbar .badge.os {
    display: none;
  }
  .topbar .brand .pill:not(.back-pill) span {
    display: none;
  }
  .topbar .brand .pill:not(.back-pill) {
    padding: 0 8px;
  }
  .topbar .presence-label {
    display: none;
  }
}

@media (max-width: 768px) {
  .topbar {
    padding: 0 14px;
    height: 56px;
  }
  .topbar-actions {
    display: none;
  }
  .topbar .brand .pill:not(.back-pill) {
    display: none;
  }
  .brand {
    gap: 8px;
  }
  .stage {
    padding: 76px 14px 60px;
  }
  h1 {
    font-size: clamp(26px, 5.5vw, 36px);
  }
  .lede {
    font-size: 16px;
  }
  .card {
    padding: 24px 16px;
  }
  .simulator-card {
    padding: 18px 14px;
  }
  .device-row {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 10px;
  }
  .device-controls {
    width: 100%;
    justify-content: space-between;
  }
  .volume-slider {
    flex: 1;
    min-width: 100px;
  }
  .row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .specs-grid {
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 14px;
  }
  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
}

@media (max-width: 420px) {
  .topbar {
    padding: 0 10px;
  }
  .brand {
    gap: 6px;
  }
  .brand-name {
    font-size: 13.5px;
  }
  .crumb-name {
    font-size: 13.5px;
  }
  .back-pill {
    padding: 0 8px;
    font-size: 11.5px;
  }
  .pill-kicker {
    font-size: 11.5px;
    padding: 4px 10px;
  }
  .brew-box {
    max-width: 100%;
    padding: 0 8px 0 10px;
  }
  .brew-box code {
    font-size: 11.5px;
  }
  .purchase-row .button.primary {
    width: 100%;
    padding: 0 12px;
    font-size: 13px;
    justify-content: center;
  }
  .purchase-row .button.primary .amount {
    font-size: 11px;
  }
  .specs-grid {
    grid-template-columns: 1fr;
  }
  .sim-title-group h3 {
    font-size: 15px;
  }
  .test-tone-btn {
    padding: 0 10px;
    font-size: 11.5px;
  }
  .hotkey-pill {
    display: none;
  }
}

@media (max-width: 360px) {
  .purchase-row .button.primary .amount {
    display: none;
  }
}