:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --surface: #ffffff;
  --surface-strong: #f9fbff;
  --ink: #101828;
  --muted: #5b667a;
  --subtle: #8893a7;
  --line: #dfe5ef;
  --line-strong: #c9d3e2;
  --blue: #0a66ff;
  --blue-dark: #084ec1;
  --blue-soft: #e8f0ff;
  --orange: #ff7a1a;
  --orange-soft: #fff1e7;
  --green: #20b26b;
  --shadow-soft: 0 24px 70px rgba(16, 24, 40, 0.12);
  --shadow-panel: 0 16px 44px rgba(16, 24, 40, 0.08);
  --radius: 8px;
  --page-width: 1180px;
  --font-ui: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Code", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-ui);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(245, 247, 251, 0.86) 0, rgba(255, 255, 255, 0) 420px),
    linear-gradient(90deg, rgba(10, 102, 255, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(10, 102, 255, 0.04) 1px, transparent 1px);
  background-size: auto, 44px 44px, 44px 44px;
  pointer-events: none;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

svg {
  display: block;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(10, 102, 255, 0.35);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.section-shell {
  width: min(100% - 40px, var(--page-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 0 max(20px, calc((100vw - var(--page-width)) / 2));
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(223, 229, 239, 0.86);
  backdrop-filter: saturate(160%) blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.05rem;
  font-weight: 760;
  text-decoration: none;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(16, 24, 40, 0.16);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
}

.nav-links a,
.site-footer nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 640;
  text-decoration: none;
}

.nav-links a:hover,
.site-footer nav a:hover {
  color: var(--blue);
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.language-select {
  width: 142px;
  min-height: 40px;
  padding: 0 34px 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink);
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) calc(100% - 17px) 17px / 6px 6px no-repeat,
    linear-gradient(135deg, var(--muted) 50%, transparent 50%) calc(100% - 12px) 17px / 6px 6px no-repeat,
    #fff;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 680;
  appearance: none;
  cursor: pointer;
}

.language-select:focus-visible {
  outline: 3px solid rgba(10, 102, 255, 0.35);
  outline-offset: 3px;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 0.96rem;
  font-weight: 720;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.header-cta svg,
.button svg {
  width: 18px;
  height: 18px;
}

.header-cta,
.button-primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 12px 28px rgba(10, 102, 255, 0.22);
}

.button-secondary {
  color: var(--blue);
  background: #fff;
  border-color: rgba(10, 102, 255, 0.28);
}

.header-cta:hover,
.button-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.button-secondary:hover {
  border-color: var(--blue);
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(480px, 1.14fr);
  gap: 44px;
  align-items: center;
  min-height: 600px;
  padding: 42px 0 32px;
}

.hero-copy h1,
.section-heading h2 {
  margin: 0;
  color: var(--ink);
  line-height: 1.04;
}

.hero-copy h1 {
  font-size: 4.05rem;
  font-weight: 820;
  overflow-wrap: normal;
}

.hero-subtitle {
  margin: 16px 0 0;
  color: #1d2738;
  font-size: 2.05rem;
  font-weight: 640;
  line-height: 1.2;
}

.hero-description {
  max-width: 37rem;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 24px 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.94rem;
  list-style: none;
}

.hero-proof li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.hero-proof li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

.hero-media {
  position: relative;
}

.hero-app-screenshot {
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #111827;
  box-shadow: var(--shadow-soft);
  object-fit: cover;
  object-position: center;
}

.tutorial-shot figcaption {
  padding: 12px 14px;
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.feature-band,
.platforms,
.faq {
  padding: 74px 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.58fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 30px;
}

.section-heading h2 {
  font-size: 2.65rem;
  font-weight: 820;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.feature-card,
.seo-columns article {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 30px rgba(16, 24, 40, 0.06);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: var(--radius);
}

.feature-icon svg {
  width: 30px;
  height: 30px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card:nth-child(5) .feature-icon {
  color: var(--orange);
  background: var(--orange-soft);
}

.feature-card h3,
.tutorial-panel h3,
.platform-panel h3,
.seo-columns h3 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.28;
}

.feature-card p,
.tutorial-panel p,
.tutorial-panel li,
.platform-panel p,
.seo-columns p,
.faq-list p,
.site-footer p {
  color: var(--muted);
}

.feature-card p {
  margin: 12px 0 0;
  font-size: 0.94rem;
}

.latest-section {
  padding: 78px 0;
}

.latest-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.latest-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fff 0, var(--surface-strong) 100%);
  box-shadow: 0 12px 30px rgba(16, 24, 40, 0.06);
}

.latest-card h3 {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.28;
}

.latest-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.type-section {
  padding: 78px 0;
}

.type-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.type-group {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 30px rgba(16, 24, 40, 0.06);
}

.type-group h3 {
  margin: 0 0 14px;
  font-size: 1.02rem;
  line-height: 1.28;
}

.type-group ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.type-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid rgba(10, 102, 255, 0.18);
  border-radius: var(--radius);
  color: #244061;
  background: #f4f8ff;
  font: 0.82rem/1 var(--font-mono);
  direction: ltr;
  unicode-bidi: isolate;
}

.type-note {
  max-width: 780px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.tutorial,
.seo-section {
  padding: 82px 0;
}

.tutorial-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.36fr) minmax(0, 0.64fr);
  gap: 18px;
  align-items: start;
}

.tutorial-tabs {
  display: grid;
  gap: 8px;
}

.tutorial-tab,
.platform-tab {
  appearance: none;
  width: 100%;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  background: #fff;
  font: inherit;
  font-size: 0.96rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.tutorial-tab.is-active,
.platform-tab.is-active {
  color: var(--blue);
  background: var(--blue-soft);
  border-color: rgba(10, 102, 255, 0.38);
  box-shadow: inset 3px 0 0 var(--blue);
}

.tutorial-panel-wrap {
  min-height: 278px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-panel);
}

.tutorial-panel p {
  margin: 12px 0 0;
}

.tutorial-panel ul {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.tutorial-panel li {
  position: relative;
  padding-left: 25px;
}

.tutorial-panel li::before {
  content: "";
  position: absolute;
  top: 0.66em;
  left: 0;
  width: 10px;
  height: 10px;
  border: 2px solid var(--blue);
  border-radius: 50%;
  background: #fff;
}

.tutorial-shot {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-panel);
}

.platform-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.platform-tab {
  text-align: center;
}

.platform-tab.is-active {
  box-shadow: inset 0 -3px 0 var(--blue);
}

.platform-panel {
  display: grid;
  grid-template-columns: minmax(240px, 0.34fr) minmax(0, 0.66fr);
  gap: 28px;
  align-items: center;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-panel);
}

.platform-panel[hidden],
.tutorial-panel[hidden] {
  display: none;
}

.platform-panel img {
  width: 100%;
  max-height: 560px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
}

.platform-panel .phone-shot {
  max-width: 300px;
  margin: 0 auto;
}

.seo-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.seo-columns p {
  margin: 12px 0 0;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 10px 26px rgba(16, 24, 40, 0.05);
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 58px;
  padding: 0 18px;
  font-weight: 760;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary::after {
  content: "";
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--blue);
  border-bottom: 2px solid var(--blue);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 160ms ease;
}

.faq-list details[open] summary::after {
  transform: rotate(225deg) translateY(-2px);
}

.faq-list p {
  margin: 0;
  padding: 0 18px 18px;
}

.site-footer {
  padding: 38px 0;
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto minmax(220px, 0.8fr);
  gap: 28px;
  align-items: center;
}

.footer-brand img {
  width: 38px;
  height: 38px;
}

.site-footer p {
  margin: 12px 0 0;
}

.site-footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-note {
  text-align: right;
  font-size: 0.92rem;
}

html[dir="rtl"] .language-select {
  padding: 0 12px 0 34px;
  background-position:
    17px 17px,
    12px 17px,
    0 0;
}

html[dir="rtl"] .tutorial-tab {
  text-align: right;
}

html[dir="rtl"] .tutorial-tab.is-active {
  box-shadow: inset -3px 0 0 var(--blue);
}

html[dir="rtl"] .tutorial-panel li {
  padding-right: 25px;
  padding-left: 0;
}

html[dir="rtl"] .tutorial-panel li::before {
  right: 0;
  left: auto;
}

html[dir="rtl"] .footer-note {
  text-align: left;
}

@media (max-width: 1080px) {
  .site-header {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .nav-links {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 48px;
  }

  .hero-copy h1 {
    font-size: 4rem;
  }

  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .latest-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .section-shell {
    width: min(100% - 28px, var(--page-width));
  }

  .site-header {
    gap: 14px;
    min-height: 66px;
    padding: 0 14px;
  }

  .header-actions {
    gap: 8px;
  }

  .language-select {
    width: 128px;
    font-size: 0.86rem;
  }

  .brand span {
    font-size: 0.98rem;
  }

  .header-cta {
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.9rem;
  }

  .hero-copy h1 {
    font-size: 3rem;
  }

  .hero-subtitle {
    font-size: 1.55rem;
  }

  .section-heading,
  .tutorial-layout,
  .platform-panel,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section-heading h2 {
    font-size: 2.2rem;
  }

  .feature-grid,
  .latest-grid,
  .type-grid,
  .seo-columns,
  .faq-list {
    grid-template-columns: 1fr;
  }

  .platform-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-note {
    text-align: left;
  }
}

@media (max-width: 520px) {
  .brand img {
    width: 38px;
    height: 38px;
  }

  .brand span {
    display: none;
  }

  .header-cta {
    width: 40px;
    padding: 0;
  }

  .header-cta span {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
  }

  .hero {
    padding: 28px 0 0;
  }

  .hero-copy h1 {
    font-size: 2.45rem;
  }

  .hero-subtitle {
    font-size: 1.35rem;
  }

  .hero-description,
  .section-heading p {
    font-size: 1rem;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .feature-band,
  .latest-section,
  .type-section,
  .platforms,
  .faq,
  .tutorial,
  .seo-section {
    padding: 56px 0;
  }

  .tutorial-panel-wrap,
  .platform-panel,
  .feature-card,
  .latest-card,
  .type-group,
  .seo-columns article {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}