/* NFC Command - Quiet Signal (web) */

:root {
  --qs-bg-base: #e8eef2;
  --qs-bg-elevated: #f3f6f8;
  --qs-surface: #f7fafb;
  --qs-text: #12181c;
  --qs-text-secondary: #5a6b75;
  --qs-text-tertiary: #8a9aa3;
  --qs-accent: #0f6e6a;
  --qs-accent-muted: rgba(15, 110, 106, 0.12);
  --qs-border: rgba(18, 24, 28, 0.08);
  --qs-data: #1a3038;
  --qs-warning: #9a6b12;
}

html {
  scroll-behavior: smooth;
}

body.qs {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, var(--qs-accent-muted), transparent 55%),
    linear-gradient(180deg, var(--qs-bg-base) 0%, #dfe7ec 100%);
  color: var(--qs-text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

.qs a {
  color: var(--qs-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.qs a:hover {
  text-decoration: none;
}

.qs :focus-visible {
  outline: 2px solid var(--qs-accent);
  outline-offset: 3px;
}

.qs-wrap {
  width: min(68rem, calc(100% - 2.5rem));
  margin-inline: auto;
}

.qs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.15rem 0 1.25rem;
}

.qs-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
}

.qs-brand img {
  width: 2rem;
  height: 2rem;
  display: block;
}

.qs-wordmark {
  font-family: Sora, -apple-system, sans-serif;
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--qs-text);
}

.qs-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 1.15rem 1.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.qs-nav a {
  color: var(--qs-text-secondary);
  text-decoration: none;
}

.qs-nav a:hover,
.qs-nav a[aria-current="page"] {
  color: var(--qs-text);
}

.qs-nav a[aria-current="page"] {
  box-shadow: inset 0 -1px 0 var(--qs-accent);
}

.qs-hero {
  display: grid;
  gap: 2.75rem;
  padding: 1.5rem 0 3.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .qs-hero {
    grid-template-columns: 1fr 22rem;
    gap: 4rem;
    padding-top: 2.5rem;
  }
}

.qs-kicker {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--qs-accent);
}

.qs-hero h1 {
  margin: 0;
  font-family: Sora, -apple-system, sans-serif;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.qs-lede {
  margin: 1.15rem 0 0;
  max-width: 34rem;
  font-size: 1.12rem;
  color: var(--qs-text-secondary);
}

.qs-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: 1.75rem;
}

.qs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  background: var(--qs-accent);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: 0;
}

.qs-btn:hover {
  filter: brightness(1.06);
  color: #fff;
}

.qs-btn-quiet {
  background: transparent;
  color: var(--qs-text);
  padding-left: 0;
  padding-right: 0;
  border-radius: 0;
  box-shadow: inset 0 -1px 0 var(--qs-text);
}

.qs-btn-quiet:hover {
  color: var(--qs-accent);
  filter: none;
  box-shadow: inset 0 -1px 0 var(--qs-accent);
}

.qs-device {
  justify-self: center;
  width: min(100%, 22rem);
  background: var(--qs-surface);
  border: 1px solid var(--qs-border);
  border-radius: 2rem;
  padding: 0.7rem;
  box-shadow: 0 24px 50px rgba(18, 24, 28, 0.08);
}

.qs-device img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1.45rem;
}

.qs-section {
  padding: 0 0 3.5rem;
}

.qs-panel {
  background: var(--qs-surface);
  border: 1px solid var(--qs-border);
  border-radius: 1.25rem;
  padding: 1.5rem 1.4rem;
}

@media (min-width: 700px) {
  .qs-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .qs-panel {
    padding: 1.75rem 1.6rem;
  }
}

.qs-panel h2,
.qs-prose h2 {
  margin: 0 0 0.65rem;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-family: Sora, -apple-system, sans-serif;
}

.qs-panel p,
.qs-panel li {
  color: var(--qs-text-secondary);
}

.qs-panel ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}

.qs-panel li + li {
  margin-top: 0.35rem;
}

.qs-fleet {
  margin-top: 1.25rem;
}

.qs-fleet .qs-price {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--qs-text-tertiary);
}

.qs-mono {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--qs-data);
}

.qs-prose {
  width: min(40rem, 100%);
  padding-bottom: 4rem;
}

.qs-prose h1 {
  margin: 0 0 0.35rem;
  font-family: Sora, -apple-system, sans-serif;
  font-size: clamp(1.85rem, 4vw, 2.4rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.qs-meta {
  margin: 0 0 2rem;
  font-size: 0.88rem;
  color: var(--qs-text-tertiary);
}

.qs-prose h2 {
  margin: 2rem 0 0.55rem;
  font-size: 1.15rem;
}

.qs-prose p,
.qs-prose li {
  color: var(--qs-text-secondary);
}

.qs-prose ul {
  padding-left: 1.15rem;
}

.qs-faq {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.qs-faq details {
  background: var(--qs-surface);
  border: 1px solid var(--qs-border);
  border-radius: 0.9rem;
  padding: 0.9rem 1.1rem;
}

.qs-faq summary {
  cursor: pointer;
  font-weight: 600;
  letter-spacing: -0.02em;
  list-style: none;
}

.qs-faq summary::-webkit-details-marker {
  display: none;
}

.qs-faq details p {
  margin: 0.7rem 0 0.15rem;
  color: var(--qs-text-secondary);
}

.qs-footer {
  border-top: 1px solid var(--qs-border);
  padding: 1.5rem 0 2.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--qs-text-tertiary);
}

.qs-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
}

.qs-footer a {
  color: var(--qs-text-secondary);
  text-decoration: none;
}

.qs-footer a:hover {
  color: var(--qs-accent);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}