:root {
  --bg: #0b1020;
  --bg-soft: #121a2f;
  --card: rgba(17, 24, 39, 0.8);
  --card-strong: #121b2c;
  --line: rgba(148, 163, 184, 0.2);
  --text: #edf3ff;
  --muted: #a3b3cf;
  --accent: #ff6a3d;
  --accent-2: #ffb347;
  --cyan: #4ad7ff;
  --green: #57d99d;
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: radial-gradient(circle at top, rgba(255, 106, 61, 0.12), transparent 30%), var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(11, 16, 32, 0.75);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(255, 106, 61, 0.8);
}

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

.nav-links a {
  color: var(--muted);
  font-size: 0.96rem;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1c110d;
  box-shadow: 0 10px 20px rgba(255, 106, 61, 0.35);
}

.btn-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.hero {
  padding: 80px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
}

h1, h2, h3 {
  margin: 0 0 14px;
  line-height: 1.05;
}

h1 {
  font-size: clamp(2.7rem, 5vw, 5rem);
  letter-spacing: -0.05em;
}

h2 {
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.05em;
}

.lead {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin-top: 32px;
}

.stat strong {
  display: block;
  font-size: 1.7rem;
  letter-spacing: -0.04em;
}

.stat span {
  color: var(--muted);
  font-size: 0.8rem;
}

.preview-card {
  position: relative;
  background: linear-gradient(180deg, rgba(18, 27, 44, 0.96), rgba(12, 18, 31, 0.96));
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.preview-window {
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(74, 215, 255, 0.15), rgba(255, 106, 61, 0.12), rgba(87, 217, 157, 0.1));
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 420px;
  padding: 18px;
  position: relative;
  overflow: hidden;
}

.preview-window::before,
.preview-window::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(22px);
  opacity: 0.75;
}

.preview-window::before {
  width: 180px;
  height: 180px;
  background: rgba(255, 106, 61, 0.35);
  right: -40px;
  top: 30px;
}

.preview-window::after {
  width: 200px;
  height: 200px;
  background: rgba(74, 215, 255, 0.2);
  left: -30px;
  bottom: -30px;
}

.preview-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.timeline {
  margin-top: 18px;
  display: grid;
  gap: 12px;
}

.timeline-bar {
  height: 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.timeline-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--accent), var(--accent-2));
}

.preview-card-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.preview-card-label::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(87, 217, 157, 0.6);
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.section {
  padding: 30px 0 80px;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 30px;
}

.section-header p {
  margin: 0;
  color: var(--muted);
  max-width: 560px;
}

.card {
  background: rgba(17, 24, 39, 0.72);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.2);
}

.card .tag {
  display: inline-block;
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 106, 61, 0.12);
  color: #ffc9b2;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1.45rem;
  margin-bottom: 8px;
}

.card p {
  color: var(--muted);
  margin: 0;
}

.card ul {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
  color: var(--text);
}

.card li::before {
  content: "•";
  color: var(--accent-2);
  margin-right: 10px;
}

.feature-list {
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.feature-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  background: rgba(17, 24, 39, 0.7);
}

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  background: linear-gradient(135deg, rgba(74, 215, 255, 0.12), rgba(255, 106, 61, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-list strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.feature-list p {
  margin: 0;
  color: var(--muted);
}

.tutorial-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  background: rgba(17, 24, 39, 0.72);
}

.tutorial-thumb {
  min-height: 200px;
  background: linear-gradient(135deg, rgba(255, 106, 61, 0.22), rgba(74, 215, 255, 0.15), rgba(87, 217, 157, 0.1));
  position: relative;
}

.tutorial-thumb::before {
  content: "▶";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 2.4rem;
  color: white;
  opacity: 0.9;
}

.tutorial-body {
  padding: 20px;
}

.meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 12px;
}

.tutorial-card h3 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.tutorial-card p {
  margin: 0;
  color: var(--muted);
}

.tutorial-card .btn {
  margin-top: 18px;
}

.steps {
  display: grid;
  gap: 18px;
}

.step {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 18px;
  padding: 18px 20px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(17, 24, 39, 0.72);
}

.step-number {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(255, 106, 61, 0.18), rgba(255, 179, 71, 0.14));
  color: var(--accent-2);
  font-weight: 800;
}

.step h3 {
  margin-bottom: 4px;
  font-size: 1.25rem;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.resource-panel {
  padding: 28px 26px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(255, 106, 61, 0.1), rgba(74, 215, 255, 0.08));
}

.resource-panel h3 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.resource-panel p {
  margin: 0 0 12px;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--line);
  padding: 26px 0 34px;
  color: var(--muted);
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .hero-grid,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .section-header {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .nav {
    min-height: auto;
    flex-direction: column;
    padding: 18px 0;
  }

  .nav-links {
    justify-content: center;
  }

  .hero {
    padding-top: 58px;
  }

  .hero-actions,
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}