* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #f4f6f8;
    font-family: Arial, sans-serif;
    color: #17202a;
}

.app {
    max-width: 520px;
    min-height: 100vh;
    margin: auto;
    background: white;
}

header {
    padding: 22px;
    border-bottom: 1px solid #eee;
}

.logo {
    font-size: 27px;
    font-weight: 800;
}

.logo span {
    color: #18a558;
}

.subtitle {
    margin-top: 4px;
    color: #6b7280;
    font-size: 14px;
}

main {
    padding: 22px;
}

.hero {
    padding: 25px 0;
}

.hero h1 {
    font-size: 30px;
    line-height: 1.1;
    margin: 0 0 15px;
}

.hero p {
    color: #5f6875;
    line-height: 1.6;
}

button {
    font-family: inherit;
}

.primary {
    width: 100%;
    margin-top: 15px;
    border: 0;
    border-radius: 14px;
    padding: 17px;
    font-size: 17px;
    font-weight: bold;
    background: #18a558;
    color: white;
    cursor: pointer;
}

.menu {
    display: grid;
    gap: 12px;
}

.card {
    background: white;
    border: 1px solid #e6e9ed;
    border-radius: 14px;
    padding: 17px;
    text-align: left;
    cursor: pointer;
}

.card strong {
    display: block;
    font-size: 16px;
}

.card span {
    display: block;
    margin-top: 6px;
    color: #737b87;
    font-size: 13px;
}

.offer {
    margin-top: 25px;
    padding: 20px;
    border-radius: 16px;
    background: #f0faf4;
    text-align: center;
}

.offer small,
.offer span {
    display: block;
}

.offer small {
    font-weight: bold;
    color: #18a558;
}

.offer strong {
    display: block;
    margin: 7px 0;
    font-size: 27px;
}