:root {
  --bg: #f4efe5;
  --card: #fffdf9;
  --ink: #14211a;
  --muted: #55615b;
  --accent: #0f7b63;
  --accent-2: #de7a1c;
  --border: #d8d3c7;
  --shadow: 0 14px 40px rgba(20, 33, 26, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(circle at 8% 10%, #ffe7c8 0%, rgba(255, 231, 200, 0) 28%),
    radial-gradient(circle at 90% 0%, #cbebde 0%, rgba(203, 235, 222, 0) 35%),
    linear-gradient(170deg, #f7f1e7 0%, #eef6f0 100%);
  color: var(--ink);
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 253, 249, 0.8);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
}

.brand-logo {
  height: 2rem;
  width: auto;
  display: block;
}

nav a {
  margin-left: 0.9rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  opacity: 0.82;
  transition: opacity 120ms ease;
}

nav a:hover {
  opacity: 1;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.4rem 1rem 2rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1.1rem;
  padding: 1.35rem;
  margin-bottom: 1.1rem;
  box-shadow: var(--shadow);
  animation: rise 240ms ease-out;
}

h1, h2 {
  margin-top: 0;
}

input, button {
  width: 100%;
  padding: 0.82rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  font-size: 1rem;
  font-family: inherit;
}

button, .btn {
  background: linear-gradient(140deg, var(--accent), #11a684);
  color: white;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-secondary {
  background: linear-gradient(140deg, var(--accent-2), #f09a3d);
}

label {
  display: block;
  margin: 0.7rem 0 0.3rem;
  font-weight: 600;
}

.muted {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: 1fr;
}

.hero {
  padding: 1.8rem 1.6rem;
  background:
    radial-gradient(circle at 0% 0%, #fff 0%, rgba(255, 255, 255, 0) 55%),
    linear-gradient(150deg, #fff7ea 0%, #ebfbf5 100%);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.feature {
  background: rgba(255, 255, 255, 0.85);
}

.qr-preview {
  width: min(256px, 100%);
  height: auto;
  display: block;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #fff;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 900px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}