<style>
/* =========================
   RESET
========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #f6f7fb;
    color: #333;
}

/* =========================
   APP WRAPPER
========================= */
.app {
    width: 100%;
    max-width: 420px;
    margin: auto;
    padding: 20px;
    padding-bottom: 80px; /* space for bottom nav */
}

/* =========================
   TOP BAR
========================= */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.top-bar h3 {
    font-size: 18px;
    font-weight: 600;
}

.avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: #ddd;
}

/* =========================
   BALANCE CARD
========================= */
.balance-card {
    background: #111;
    color: #fff;
    padding: 18px;
    border-radius: 16px;
    margin-bottom: 20px;
}

.balance-card h4 {
    font-size: 14px;
    margin-bottom: 10px;
    opacity: 0.8;
}

.balance-card p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 4px;
}

/* =========================
   SWITCH (NGN / USD)
========================= */
.switch {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 14px;
    opacity: 0.9;
}

.switch span {
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 8px;
}

.switch span:hover {
    background: rgba(255,255,255,0.1);
}

/* =========================
   INPUTS
========================= */
input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid #ddd;
    font-size: 14px;
    background: #fff;
    outline: none;
    margin-top: 5px;
}

input:focus,
select:focus {
    border-color: #ff7a00;
}

/* =========================
   FORM GROUP
========================= */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 6px;
    color: #333;
}

/* =========================
   BUTTONS
========================= */
.send-btn,
.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    background: #ff7a00;
    color: #fff;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
}

.send-btn:hover {
    background: #e86f00;
}

/* =========================
   TRANSACTIONS
========================= */
.transactions {
    margin-top: 20px;
}

.transaction {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
    font-size: 14px;
}

/* =========================
   SEND AGAIN
========================= */
.send-again {
    margin: 20px 0;
}

/* =========================
   BOTTOM NAV (FOOTER)
========================= */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    display: flex;
    justify-content: space-around;
    padding: 12px 0;
    border-top: 1px solid #eee;
    z-index: 999;
}

.bottom-nav a {
    text-decoration: none;
    color: #333;
    font-size: 13px;
    font-weight: 500;
}

.bottom-nav a:hover {
    color: #ff7a00;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 480px) {
    .app {
        padding: 15px;
    }
}
.convert-box{
    margin-top:20px;
    background:#fff;
    padding:15px;
    border-radius:12px;
    box-shadow:0 8px 20px rgba(0,0,0,0.05);
}

.form-row{
    display:flex;
    gap:10px;
    align-items:center;
    margin-top:10px;
}

.form-row input,
.form-row select{
    flex:1;
    padding:10px;
    border:1px solid #ddd;
    border-radius:8px;
}

.convert-result{
    margin-top:10px;
    font-size:14px;
    color:#444;
}
</style>