:root {
  --brand: #67945b;
  --ios: #0066CC;
  --bg: #f6f7f8;
  --card: #ffffff;
  --text: #222;
  --muted: #666;
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
}

/* ===== Layout ===== */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

/* ===== Header ===== */
header {
  background: linear-gradient(135deg, var(--brand), #4e7e5c);
  color: #fff;
  text-align: center;
  padding: 60px 20px;
}

header .logo {
  width: 110px;
  border-radius: 20px;
  margin-bottom: 15px;
}

header h1 {
  margin: 10px 0;
  font-size: 2.2rem;
}

header p {
  opacity: 0.95;
  font-size: 1.1rem;
}

/* ===== Downloads ===== */
.downloads {
  background: var(--card);
  margin: -40px auto 40px;
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,.08);
  padding: 30px;
  text-align: center;
  max-width: 700px;
}

.downloads h2 {
  margin-bottom: 20px;
  color: var(--brand);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  margin: 8px;
  border-radius: 12px;
  font-weight: bold;
  text-decoration: none;
  color: #fff;
  transition: transform .15s ease, box-shadow .15s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0,0,0,.15);
}

.btn.android {
  background: var(--brand);
}

.btn.ios {
  background: var(--ios);
}

/* ===== Sections ===== */
section {
  background: var(--card);
  margin: 30px auto;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: 0 8px 25px rgba(0,0,0,.06);
  max-width: 900px;
}

section h3 {
  color: var(--brand);
  margin-bottom: 15px;
}

ul {
  padding-right: 20px;
}

/* ===== Contact ===== */
.contact form {
  display: grid;
  gap: 12px;
  max-width: 450px;
  margin: auto;
}

.contact input,
.contact textarea {
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 1rem;
}

.contact textarea {
  min-height: 120px;
}

.contact button {
  background: var(--brand);
  color: white;
  border: none;
  padding: 14px;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 30px 15px;
  font-size: 0.9rem;
  color: var(--muted);
}

footer a {
  color: var(--brand);
  text-decoration: none;
}

/* ===== Mobile ===== */
@media (max-width: 600px) {
  header h1 {
    font-size: 1.7rem;
  }

  .downloads {
    margin-top: -20px;
  }

  section {
    padding: 20px;
  }
}