* { box-sizing: border-box; }
body {
    margin: 0;
    background: #0f1115;
    color: #e6e6e6;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.topnav {
    display: flex;
    gap: 20px;
    align-items: center;
    padding: 14px 24px;
    background: #161922;
    border-bottom: 1px solid #262b38;
}
.topnav a[href="logout.php"] { color: #f24c4c; }
.topnav a {
    color: #b6bccb;
    text-decoration: none;
    font-size: 14px;
}
.topnav a:hover { color: #fff; }
.topnav .brand { font-weight: 700; color: #fff; margin-right: 20px; }
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
h1, h2 { font-weight: 600; }
.cards { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.card {
    background: #161922;
    border: 1px solid #262b38;
    border-radius: 10px;
    padding: 18px 22px;
    min-width: 180px;
}
.card .label { font-size: 12px; color: #8a91a3; text-transform: uppercase; letter-spacing: .04em; }
.card .value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.pos { color: #35c98f; }
.neg { color: #f24c4c; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #262b38; font-size: 14px; }
th { color: #8a91a3; font-weight: 600; font-size: 12px; text-transform: uppercase; }
tr:hover td { background: #161922; }
.badge { padding: 2px 8px; border-radius: 5px; font-size: 12px; font-weight: 600; }
.badge.buy { background: #12351f; color: #35c98f; }
.badge.sell { background: #3a1414; color: #f24c4c; }
form.order-form { background: #161922; border: 1px solid #262b38; border-radius: 10px; padding: 24px; max-width: 480px; }
form.order-form label { display: block; margin-bottom: 4px; font-size: 13px; color: #8a91a3; }
form.order-form input, form.order-form select {
    width: 100%; padding: 9px 10px; margin-bottom: 16px;
    background: #0f1115; border: 1px solid #262b38; border-radius: 6px; color: #fff;
}
form.order-form button {
    background: #35c98f; color: #0f1115; border: none; padding: 11px 20px;
    border-radius: 6px; font-weight: 700; cursor: pointer;
}
form.order-form button.sell { background: #f24c4c; color: #fff; }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.alert.error { background: #3a1414; color: #ff8a8a; }
.alert.success { background: #12351f; color: #7fe6b8; }
.hint { color: #8a91a3; font-size: 13px; margin-top: -8px; margin-bottom: 16px; }