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

html,
body {
  width: 100%;
  min-height: 100vh;
  background: #000;
  color: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 45px;
  padding: 5px 10px 0;
  background: #000;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 5px;
}

.logo {
  width: 35px;
  height: 35px;
  object-fit: contain;
}

.brand-name {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

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

.icon {
  width: 20px;
  height: 20px;
  color: #fff;
}

.menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.menu-btn .icon {
  width: 24px;
  height: 24px;
}

/* Hero */
.hero {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.hero-top {
  background: #000 url("assets/bg-mobile.png") no-repeat center top;
  background-size: 100% auto;
  padding: 40px 24px 20px;
}

.hero-text {
  text-align: center;
}

.hero-text h1 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.45;
  color: #fff;
}

.hero-text p {
  margin-top: 20px;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.9);
}

.download-btn {
  display: inline-block;
  margin-top: 28px;
  padding: 14px 48px;
  background: linear-gradient(135deg, #00e676 0%, #00c853 100%);
  color: #000;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
  letter-spacing: 0.3px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 4px 20px rgba(0, 230, 118, 0.35);
}

.download-btn:active {
  transform: scale(0.97);
}

/* Phone mockup */
.hero-phone {
  display: flex;
  justify-content: center;
  padding: 20px 0 60px;
  background: #000;
}

.phone-img {
  width: 63%;
  max-width: 280px;
  height: auto;
  display: block;
}

/* Larger screens */
@media (min-width: 481px) {
  .hero-top {
    padding: 48px 40px 24px;
  }

  .brand-name {
    font-size: 16px;
  }

  .hero-text h1 {
    font-size: 36px;
  }
}