body {
    background: #111;
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;

    display: flex;
    justify-content: center;
}

.app-container {
    max-width: 420px;
    width: 100%;
    padding: 20px;
    padding-top: 80px;
    padding-bottom: 80px; /* место для нижнего меню */
    box-sizing: border-box;
}

h1 {
    margin-top: 0;
    font-size: 24px;
    font-weight: bold;
}

/* Экраны */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* Нижняя навигация */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: #181818;
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    border-top: 1px solid #333;
}

.nav-item {
    color: #9a9a9a;
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    min-width: 70px;
}

.nav-item.active {
    color: #2f8cff;
}

.icon {
    font-size: 22px;
    margin-bottom: 3px;
}

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;

    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 20px;

    background: #111;
    border-bottom: 1px solid #333;

    z-index: 1000;
}

.balance {
    display: flex;
    align-items: center;
    margin-right: 14px;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
}

.ton-icon {
    width: 22px;
    height: 22px;
    margin-right: 6px;
}

.add-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: #2f8cff;
    color: #fff;
    font-size: 22px;
    line-height: 32px;
    text-align: center;
    cursor: pointer;
}

.add-btn:active {
    background: #1b66c9;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0 20px 0;
}

.profile-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.profile-name {
    font-size: 20px;
    font-weight: bold;
    color: white;
}