* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, Segoe UI, Roboto, sans-serif;
    background: #10131a;
    color: #eaeef2;
}

/* Login */
.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-box { background: #1a1f2b; padding: 30px; border-radius: 12px; width: 90%; max-width: 340px; }
.login-box h1 { text-align: center; margin-top: 0; }
.login-box label { display: block; margin-top: 12px; font-size: 14px; color: #9aa4b2; }
.login-box input { width: 100%; padding: 10px; margin-top: 4px; border-radius: 8px; border: 1px solid #333; background: #10131a; color: #fff; }
.login-box button { width: 100%; margin-top: 20px; padding: 12px; border: none; border-radius: 8px; background: #2f6bff; color: #fff; font-size: 16px; }
.error-msg { background: #4a1f1f; color: #ff8a8a; padding: 10px; border-radius: 8px; margin-bottom: 10px; }

/* App */
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: #1a1f2b; }
.brand { font-weight: bold; font-size: 18px; }
.logout-link { color: #9aa4b2; text-decoration: none; font-size: 14px; }

.account-panel { display: flex; gap: 10px; padding: 16px; }
.account-box { flex: 1; background: #1a1f2b; border-radius: 10px; padding: 12px; text-align: center; }
.account-box .label { font-size: 12px; color: #9aa4b2; }
.account-box .value { font-size: 18px; font-weight: bold; margin-top: 4px; }

.order-panel, .trades-panel { background: #1a1f2b; margin: 0 16px 16px 16px; padding: 16px; border-radius: 12px; }
.order-panel h2, .trades-panel h2 { margin-top: 0; font-size: 16px; color: #9aa4b2; }
.order-panel label { display: block; margin-top: 10px; font-size: 13px; color: #9aa4b2; }
.order-panel input { width: 100%; padding: 10px; margin-top: 4px; border-radius: 8px; border: 1px solid #333; background: #10131a; color: #fff; font-size: 15px; }

.button-row { display: flex; gap: 10px; margin-top: 16px; }
.btn { flex: 1; padding: 14px; border: none; border-radius: 10px; font-size: 16px; font-weight: bold; color: #fff; }
.btn-buy { background: #1fbf6f; }
.btn-sell { background: #e5484d; }
.msg { margin-top: 10px; font-size: 13px; color: #9aa4b2; min-height: 16px; }

.trade-card { background: #10131a; border-radius: 10px; padding: 12px; margin-top: 10px; }
.trade-card .row { display: flex; justify-content: space-between; font-size: 14px; margin-top: 4px; }
.trade-card .profit-pos { color: #1fbf6f; font-weight: bold; }
.trade-card .profit-neg { color: #e5484d; font-weight: bold; }
.trade-card .btn-close { margin-top: 10px; width: 100%; padding: 10px; border: none; border-radius: 8px; background: #333; color: #fff; }