* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #220033, #000);
  color: #39ff14;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.appbar {
  padding: 20px;
  text-align: center;
  background: rgba(0,0,0,0.7);
  border-bottom: 1px solid #39ff14;
}

.appbar h1 {
  margin: 0;
  letter-spacing: 4px;
}

.content {
  flex: 1;
  padding: 30px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
}

.card {
  background: rgba(0,0,0,0.6);
  border: 1px solid #39ff14;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 0 15px rgba(57,255,20,0.4);
}

.card h2 {
  margin-top: 0;
}

.btn {
  height: 42px;              /* беше ~48–50 */
  padding: 0 18px;
  border-radius: 14px;       /* по-app-like */
  font-size: 14px;
  font-weight: 600;
  background: #39ff14;
  color: #000;
  border: none;
  box-shadow: 0 0 8px rgba(57,255,20,0.4);
}

.navbar {
  display: flex;
  justify-content: space-around;
  padding: 15px;
  background: rgba(0,0,0,0.85);
  border-top: 1px solid #39ff14;
}

.navbar a {
  color: #39ff14;
  text-decoration: none;
}

.navbar a.active {
  text-shadow: 0 0 8px #39ff14;
}

input {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border-radius: 8px;
  border: 1px solid #39ff14;
  background: black;
  color: #39ff14;
}

label {
  margin-top: 15px;
  display: block;
}

.center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.full {
  width: 100%;
  margin-top: 20px;
}
/* SCREEN */
.screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* APPBAR */
.appbar {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.85);
  border-bottom: 1px solid #39ff14;
}

.appbar h1 {
  font-size: 20px;
  letter-spacing: 3px;
}

/* CONTENT */
.content {
  flex: 1;
  padding: 20px 16px 90px;
}

/* SECTION */
.section {
  margin-bottom: 18px;
}

/* CARD */
.card {
  padding: 18px;
  border-radius: 14px;
}

/* BUTTON */
.btn {
  height: 48px;
  border-radius: 24px;
  font-size: 15px;
}

/* NAVBAR */
.navbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: rgba(0,0,0,0.9);
  border-top: 1px solid #39ff14;
}

.navbar a {
  font-size: 13px;
  opacity: 0.7;
}

.navbar a.active {
  opacity: 1;
  text-shadow: 0 0 10px #39ff14;
}