*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --blue: #1565C0;
  --blue-light: #1976D2;
  --blue-dark: #0D47A1;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #5a6478;
  --border: #e0e4ed;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Header ── */
header {
  background: var(--blue);
  color: #fff;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 60px;
}

header .logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

header .logo img {
  height: 44px;
  width: 44px;
  object-fit: contain;
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-light) 100%);
  color: #fff;
  text-align: center;
  padding: 72px 24px 80px;
}

.hero-logo {
  width: 450px;
  max-width: 90vw;
  margin-bottom: 32px;
  border-radius: 32px;
}

.hero h1 {
  font-size: clamp(28px, 6vw, 48px);
  font-weight: 800;
  letter-spacing: -.5px;
  line-height: 1.15;
}

.hero p {
  font-size: clamp(15px, 2.5vw, 19px);
  opacity: .88;
  margin-top: 16px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.55;
}

.cta-row {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 36px;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--blue-dark);
  font-weight: 700;
  font-size: 16px;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  transition: transform .15s, box-shadow .15s;
  box-shadow: 0 4px 14px rgba(0,0,0,.25);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(0,0,0,.3);
}

.btn-download svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* ── Feature cards ── */
.features {
  max-width: 1000px;
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
}

.card .icon {
  font-size: 32px;
  margin-bottom: 14px;
}

.card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

/* ── How it works ── */
.section-how {
  background: var(--card);
  border-top: 1px solid var(--border);
}

.section-how-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
}

.section-how-inner h2 {
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 800;
  margin-bottom: 12px;
}

.section-how-inner .subtitle {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 40px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  text-align: left;
}

.step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.step-num {
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  min-width: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.step-body h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.step-body p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

/* ── Download section ── */
.download-section {
  max-width: 600px;
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
}

.download-section h2 {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  margin-bottom: 12px;
}

.download-section > p {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 32px;
  line-height: 1.55;
}

.download-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.download-card .app-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  overflow: hidden;
}

.download-card .app-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.download-card h3 {
  font-size: 20px;
  font-weight: 700;
}

.download-card .meta {
  color: var(--muted);
  font-size: 14px;
}

.btn-apk {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: 8px;
  text-decoration: none;
  transition: background .15s;
}

.btn-apk:hover {
  background: var(--blue-dark);
}

.sideload-note {
  font-size: 13px;
  color: var(--muted);
  max-width: 380px;
  text-align: center;
  line-height: 1.5;
}

/* ── Contact ── */
.contact-section {
  max-width: 600px;
  margin: 0 auto;
  padding: 48px 24px;
  text-align: center;
}

.contact-section h2 {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  margin-bottom: 12px;
}

.contact-section p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.contact-section a {
  color: var(--blue);
  text-decoration: none;
}

.contact-section a:hover {
  text-decoration: underline;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 13px;
}