/* Design tokens */
:root {
  --color-brand: #00aae4;
  --color-brand-hover: #0097cb;
  --color-ink: #172c39;
  --color-muted: #526571;
  --color-accent-text: #007ca7;
  --color-line: #e4ebef;
  --color-surface: #f5f9fb;
  --color-white: #fff;
  --color-brand-tint: rgb(0 170 228 / 5%);
  --container-width: 1200px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 5rem;
  --radius-button: 0.75rem;
}

/* Base and accessibility */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-ink);
  font-family: Tahoma, Arial, sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--color-accent-text); outline-offset: 5px; }
.container { width: min(var(--container-width), calc(100% - 4rem)); margin-inline: auto; }
.skip-link {
  position: absolute;
  inset-block-start: 1rem;
  inset-inline-start: 1rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  background: var(--color-ink);
  color: var(--color-white);
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); }

/* Header */
.site-header { border-block-end: 1px solid var(--color-line); }
.header-inner { display: flex; align-items: center; gap: var(--space-3); min-height: 88px; }
.brand { display: inline-flex; align-items: center; gap: 0.35rem; flex-shrink: 0; font-size: 1.15rem; font-weight: 700; }
.brand-icon { display: block; width: 58px; height: 58px; object-fit: contain; flex-shrink: 0; }
.navigation { display: flex; align-items: center; justify-content: space-between; flex: 1; gap: var(--space-3); }
.nav-links { display: flex; align-items: center; gap: clamp(0.8rem, 1.5vw, 1.5rem); list-style: none; margin: 0; padding: 0; }
.nav-links a { display: inline-flex; align-items: center; min-height: 44px; font-size: 0.875rem; white-space: nowrap; color: var(--color-muted); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--color-accent-text); }
.nav-links a[aria-current="page"] { font-weight: 700; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; min-height: 54px; padding: 0.8rem 1.35rem; border: 1px solid transparent; border-radius: var(--radius-button); font-size: 0.95rem; font-weight: 700; text-align: center; }
.button-brand { background: var(--color-brand); color: var(--color-ink); }
.button-brand:hover { background: var(--color-brand-hover); }
.button-secondary { background: var(--color-white); border-color: var(--color-line); }
.button-secondary:hover { border-color: var(--color-accent-text); color: var(--color-accent-text); }
.header-download { min-height: 46px; font-size: 0.875rem; white-space: nowrap; }
.menu-toggle { align-items: center; gap: 0.6rem; min-height: 44px; padding: 0.5rem 0.75rem; border: 1px solid var(--color-line); border-radius: var(--radius-button); background: var(--color-white); color: var(--color-ink); cursor: pointer; }
.menu-icon { display: grid; gap: 4px; width: 19px; }
.menu-icon span { height: 2px; background: currentColor; }
.menu-label { font-size: 0.8rem; }

/* Hero and real application screenshot */
.hero { padding-block: var(--space-4) var(--space-2); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: var(--space-5); align-items: center; }
.hero-content { padding-block: var(--space-2); }
.eyebrow { display: inline-flex; align-items: center; gap: 0.6rem; margin: 0 0 var(--space-2); padding: 0.35rem 0.85rem; border: 1px solid rgb(0 170 228 / 12%); border-radius: 100px; background: var(--color-brand-tint); color: var(--color-accent-text); font-size: 0.8rem; font-weight: 700; }
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--color-brand); }
h1 { margin: 0; font-size: clamp(2.15rem, 3.5vw, 3rem); line-height: 1.55; font-weight: 700; }
.headline-line { display: block; }
.headline-accent { color: var(--color-brand); }
.hero-description { max-width: 36rem; margin: var(--space-3) 0 0; font-size: 1.08rem; line-height: 2.1; color: var(--color-muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-block-start: var(--space-4); }
.hero-visual { display: grid; place-items: center; position: relative; isolation: isolate; padding: var(--space-2); }
.hero-visual::before { content: ""; position: absolute; inset: 17% 2%; z-index: -1; border-radius: 46% 54% 48% 52%; background: rgb(0 170 228 / 3%); }
.device { position: relative; width: min(264px, 100%); padding: 23px 7px 20px; border: 1px solid #b8c5cd; border-radius: 30px; background: #e8eef2; box-shadow: 0 14px 28px -22px rgb(23 44 57 / 30%); }
/* Hardware details stay in the bezel, never on top of the screenshot. */
.device-screen { border: 1px solid #cdd7dd; background: var(--color-white); }
.app-screenshot { display: block; width: 100%; height: auto; object-fit: contain; }
.device-camera { position: absolute; inset-block-start: 9px; inset-inline-start: calc(50% - 24px); width: 48px; height: 5px; border-radius: 20px; background: #b8c5cd; }
.device-home { position: absolute; inset-block-end: 8px; inset-inline-start: calc(50% - 30px); width: 60px; height: 3px; border-radius: 4px; background: #b8c5cd; }

/* Compact statistics and core features */
.stats-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0; padding-block: var(--space-3); border-block: 1px solid var(--color-line); }
.stat { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 0.25rem; padding: 0.25rem var(--space-2); text-align: center; }
.stat + .stat { border-inline-start: 1px solid var(--color-line); }
.stat dt { color: var(--color-muted); font-size: 0.85rem; }
.stat dd { order: -1; margin: 0; color: var(--color-ink); font-size: clamp(1.15rem, 2vw, 1.5rem); font-weight: 700; }
.stat:first-child dd { color: var(--color-accent-text); }
.features { padding-block: var(--space-6); scroll-margin-block-start: var(--space-3); }
.section-intro { max-width: 44rem; margin-inline: auto; margin-block-end: var(--space-4); text-align: center; }
.section-intro h2 { margin: 0; font-size: clamp(1.6rem, 2.7vw, 2.2rem); line-height: 1.65; }
.section-description { margin: var(--space-2) 0 0; color: var(--color-muted); font-size: 1rem; line-height: 2; }
.features-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); }
.feature-card { padding: var(--space-4); border: 1px solid var(--color-line); border-radius: 1rem; background: var(--color-white); }
.feature-icon { display: block; width: 48px; height: 48px; padding: 10px; margin-block-end: var(--space-3); border-radius: 0.75rem; color: var(--color-accent-text); background: var(--color-brand-tint); }
.feature-card h3 { margin: 0 0 var(--space-1); font-size: 1.1rem; line-height: 1.7; }
.feature-card p { margin: 0; color: var(--color-muted); font-size: 0.95rem; line-height: 1.95; }
/* Informational cards are not added to the keyboard tab order. */
@media (hover: hover) and (pointer: fine) {
  .feature-card:hover, .feature-card:focus-within { border-color: rgb(0 170 228 / 35%); background: #fcfeff; }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@media (min-width: 1101px) {
  .device { width: min(296px, 100%); }
}
@media (max-width: 1000px) {
  .features-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Editorial product showcase: text stays first in the document reading order. */
.showcase { padding-block: var(--space-6); background: #f8fbfd; }
.showcase .section-intro { margin-block-end: var(--space-5); }
.showcase-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); grid-template-areas: "copy visual"; align-items: center; gap: clamp(2rem, 6vw, 5rem); padding-block: var(--space-5); }
.showcase-row:nth-child(even) { grid-template-areas: "visual copy"; }
.showcase-row + .showcase-row { border-block-start: 1px solid var(--color-line); }
.showcase-copy { grid-area: copy; min-width: 0; max-width: 29rem; justify-self: center; }
.showcase-number { display: inline-block; margin-block-end: var(--space-2); color: var(--color-accent-text); font-size: 0.8rem; letter-spacing: 0.15em; }
.showcase-copy h3 { margin: 0; font-size: clamp(1.45rem, 2.3vw, 2rem); line-height: 1.7; }
.showcase-copy p { margin: var(--space-2) 0 0; color: var(--color-muted); font-size: 1rem; line-height: 2; }
.showcase-visual { grid-area: visual; position: relative; isolation: isolate; display: grid; place-items: center; min-width: 0; padding: var(--space-2); }
.showcase-visual::before { content: ""; position: absolute; z-index: -1; inset: 13% 4%; border-radius: 48% 52% 45% 55%; background: rgb(0 170 228 / 4%); }
.showcase-row:nth-child(2) .showcase-visual::before { inset: 18% 7%; border: 1px solid rgb(0 170 228 / 12%); border-radius: 2rem; background: transparent; }
.showcase-row:nth-child(3) .showcase-visual::before { inset: 10% 9%; border-radius: 50% 50% 2rem 2rem; background: rgb(0 170 228 / 3%); }
.showcase-row:nth-child(4) .showcase-visual::before { inset: 20% 2%; border-radius: 2rem 5rem; background: rgb(0 170 228 / 4%); }
.showcase-device { position: relative; width: min(244px, 100%); padding: 16px 6px; border: 1px solid #c9d5dc; border-radius: 22px; background: #edf2f5; box-shadow: 0 12px 24px -22px rgb(23 44 57 / 25%); }
.showcase-device::before { content: ""; position: absolute; top: 6px; left: calc(50% - 17px); width: 34px; height: 3px; border-radius: 3px; background: #b8c5cd; }
.showcase-device img { display: block; width: 100%; height: auto; object-fit: contain; }
@media (max-width: 760px) {
  .showcase { padding-block: var(--space-5); }
  .showcase .section-intro { margin-block-end: var(--space-2); }
  .showcase-row, .showcase-row:nth-child(even) { grid-template-columns: minmax(0, 1fr); grid-template-areas: "copy" "visual"; gap: var(--space-3); padding-block: var(--space-4); }
  .showcase-copy { width: 100%; max-width: 32rem; }
  .showcase-visual { width: min(100%, 380px); justify-self: center; }
  .showcase-device { width: min(208px, 100%); }
}

/* Target audience: scoped styles preserve the approved sections above. */
.audience { padding-block: var(--space-6); }
.audience-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); }
.audience-card { min-width: 0; padding: var(--space-4); border: 1px solid var(--color-line); border-radius: 1rem; background: var(--color-white); }
.audience-card h3 { margin: 0 0 var(--space-1); font-size: 1.1rem; line-height: 1.7; }
.audience-card p { margin: 0; color: var(--color-muted); font-size: 0.95rem; line-height: 1.95; }
.audience-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); margin-block-start: var(--space-4); padding: var(--space-4); border: 1px solid var(--color-line); border-radius: 1rem; background: var(--color-brand-tint); }
.audience-cta h3 { margin: 0; font-size: 1.2rem; line-height: 1.7; }
.audience-cta p { margin: var(--space-1) 0 0; color: var(--color-muted); font-size: 0.95rem; line-height: 1.95; }
.audience-cta .button { max-width: 100%; }
@media (max-width: 1000px) {
  .audience-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .audience { padding-block: var(--space-5); }
}
@media (max-width: 600px) {
  .audience-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }
  .audience-card, .audience-cta { padding: var(--space-3); }
  .audience-cta { flex-direction: column; align-items: stretch; }
  .audience-cta .button { padding-inline: 0.5rem; font-size: 0.875rem; }
}

/* Advanced capabilities: two prominent panels followed by four compact items. */
.advanced { padding-block: var(--space-6); background: #f8fbfd; }
.advanced-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3); }
.advanced-card { min-width: 0; padding: var(--space-3); border: 1px solid var(--color-line); border-radius: 1rem; background: var(--color-white); }
.advanced-icon { display: block; width: 44px; height: 44px; padding: 9px; margin-block-end: var(--space-2); color: var(--color-accent-text); background: var(--color-brand-tint); border-radius: 0.75rem; }
.advanced-card h3 { margin: 0 0 var(--space-1); font-size: 1.05rem; line-height: 1.75; }
.advanced-card p { margin: 0; max-width: 34rem; color: var(--color-muted); font-size: 0.95rem; line-height: 1.95; overflow-wrap: break-word; }
.advanced-card--prominent { grid-column: span 2; position: relative; padding: var(--space-4); background: #eef8fc; border-color: #d9edf5; }
.advanced-card--prominent:nth-child(2) { background: #f3f9fc; }
.advanced-card--prominent::before { content: ""; position: absolute; inset-block-start: var(--space-4); inset-inline-end: var(--space-4); width: 48px; height: 3px; border-radius: 3px; background: rgb(0 170 228 / 25%); }
.advanced-card--prominent .advanced-icon { width: 52px; height: 52px; padding: 12px; background: var(--color-white); }
.advanced-card--prominent h3 { font-size: 1.3rem; }
@media (hover: hover) and (pointer: fine) {
  .advanced-card:hover { border-color: rgb(0 170 228 / 40%); }
}
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .advanced-card { transition: border-color 160ms ease; }
}
@media (max-width: 1000px) {
  .advanced-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advanced-card--prominent { grid-column: auto; padding: var(--space-3); }
  .advanced-card--prominent h3 { font-size: 1.15rem; }
}
@media (max-width: 600px) {
  .advanced { padding-block: var(--space-5); }
  .advanced-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }
  .advanced-card--prominent .advanced-icon { width: 44px; height: 44px; padding: 9px; }
  .advanced-card--prominent h3 { font-size: 1.1rem; }
}

/* Lightweight YouTube links; no embedded players or scripted controls. */
.tutorials { padding-block: var(--space-5); border-block-start: 1px solid var(--color-line); scroll-margin-block-start: var(--space-3); }
.tutorials-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); }
.tutorial-card { min-width: 0; border: 1px solid var(--color-line); border-radius: 1rem; background: var(--color-white); box-shadow: 0 8px 20px -18px rgb(23 44 57 / 20%); }
.tutorial-link { display: block; height: 100%; border-radius: 1rem; }
.tutorial-preview { position: relative; display: grid; place-items: center; aspect-ratio: 4 / 3; overflow: hidden; border-radius: 1rem 1rem 0 0; background: var(--color-surface); }
.tutorial-preview img { display: block; width: 100%; height: 100%; object-fit: contain; }
/* The Short remains uncropped in its supplied thumbnail, within the same compact canvas. */
.tutorial-card--short .tutorial-preview { background: var(--color-brand-tint); }
.tutorial-play { position: absolute; display: grid; place-items: center; width: 62px; height: 62px; border: 3px solid var(--color-white); border-radius: 50%; background: var(--color-brand); color: var(--color-ink); box-shadow: 0 2px 10px rgb(23 44 57 / 18%); }
.tutorial-play svg { width: 28px; height: 28px; margin-inline-end: 3px; }
.tutorial-info { padding: var(--space-2) var(--space-3) var(--space-3); }
.tutorial-label { display: inline-flex; padding: 0.15rem 0.55rem; border-radius: 0.4rem; margin-block-end: var(--space-1); background: var(--color-brand-tint); color: var(--color-accent-text); font-size: 0.75rem; font-weight: 700; }
.tutorial-info h3 { margin: 0; color: var(--color-muted); font-size: 0.9rem; font-weight: 400; line-height: 1.8; }
.tutorial-watch { display: flex; align-items: center; justify-content: space-between; gap: var(--space-1); margin-block-start: 0.65rem; color: var(--color-accent-text); font-size: 0.85rem; font-weight: 700; }
.tutorial-watch > span { font-size: 1.15rem; }
.tutorial-link:focus-visible { outline-offset: 5px; }
.tutorials-cta { margin-block-start: var(--space-4); text-align: center; }
.tutorials-cta .button { max-width: 100%; flex-wrap: wrap; }
.tutorial-channel-icon { width: 22px; height: 22px; flex-shrink: 0; color: var(--color-accent-text); }
.tutorial-card:focus-within { border-color: var(--color-accent-text); }
@media (hover: hover) and (pointer: fine) {
  .tutorial-card:hover { border-color: rgb(0 170 228 / 30%); box-shadow: 0 10px 24px -16px rgb(23 44 57 / 22%); }
  .tutorial-link:hover .tutorial-play { background: var(--color-brand-hover); }
}
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .tutorial-card { transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease; }
  .tutorial-card:hover { transform: translateY(-2px); }
  .tutorial-play { transition: background-color 160ms ease, color 160ms ease; }
}
@media (min-width: 601px) and (max-width: 1000px) {
  .tutorials-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tutorial-card:first-child { grid-column: 1 / -1; }
  .tutorial-card:first-child .tutorial-link { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: center; }
  .tutorial-card:first-child .tutorial-preview { border-radius: 0 1rem 1rem 0; }
}
@media (max-width: 600px) {
  .tutorials { padding-block: var(--space-5); }
  .tutorials-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-3); }
  .tutorial-preview { aspect-ratio: 16 / 10; }
  .tutorial-info { padding: var(--space-2) var(--space-3); }
  .tutorials-cta .button { width: 100%; padding-inline: 0.5rem; font-size: 0.875rem; }
}

/* Tablet and mobile navigation; links remain visible without JavaScript. */
@media (max-width: 1100px) {
  .header-inner { flex-wrap: wrap; justify-content: space-between; gap: 0; min-height: 84px; padding-block: var(--space-2); }
  .menu-toggle:not([hidden]) { display: inline-flex; }
  .navigation { flex-basis: 100%; flex-direction: column; align-items: stretch; gap: var(--space-2); padding-block-start: var(--space-2); }
  .nav-links { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-links a { display: flex; padding: 0.6rem 0.75rem; border-radius: 0.5rem; }
  .nav-links a:hover { background: var(--color-surface); }
  .header-download { align-self: flex-start; }
  .hero-grid { gap: var(--space-4); }
  .hero-actions .button { padding-inline: 1rem; }
}
@media (max-width: 760px) {
  .container { width: calc(100% - 2.5rem); }
  .hero { padding-block: var(--space-3) var(--space-2); }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .hero-content { padding: 0; }
  h1 { font-size: clamp(1.85rem, 6vw, 2.65rem); }
  .hero-description { font-size: 1rem; }
  .hero-visual { width: min(100%, 440px); margin-inline: auto; }
  .device { width: min(224px, 100%); }
  .stats-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); padding-block: var(--space-1); }
  .stat { padding: var(--space-2) var(--space-1); }
  .stat:nth-child(3) { border-inline-start: 0; }
  .stat:nth-child(n + 3) { border-block-start: 1px solid var(--color-line); }
  .features { padding-block: var(--space-5); }
}
@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; gap: var(--space-2); }
  .feature-card { padding: var(--space-3); }
}
@media (max-width: 420px) {
  .brand { font-size: 1rem; gap: 0.15rem; }
  .brand-icon { width: 46px; height: 46px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .button { padding-inline: 0.5rem; font-size: 0.875rem; }
}