:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-alt: #eef3fb;
    --text: #172033;
    --muted: #6b7485;
    --border: #d9e1ef;
    --primary: #1f6feb;
    --success: #198754;
    --danger: #dc3545;
    --warning: #b7791f;
    --shadow: 0 20px 45px rgba(23, 32, 51, 0.08);
    --sidebar: #0e1523;
    --sidebar-soft: #162238;
}

body {
    background:
        radial-gradient(circle at top right, rgba(31, 111, 235, 0.10), transparent 30%),
        linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
    color: var(--text);
    min-height: 100vh;
}

.app-shell-body {
    margin: 0;
}

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: linear-gradient(180deg, var(--sidebar) 0%, #121b2d 100%);
    color: #eef3ff;
    padding: 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    color: #fff;
    text-decoration: none;
    margin-bottom: 2rem;
}

.sidebar-brand strong,
.sidebar-brand small {
    display: block;
}

.sidebar-brand small {
    color: #9db0d3;
}

.sidebar-brand-logo,
.login-logo {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, #1f6feb 0%, #6ea8fe 100%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #fff;
}

.sidebar-nav {
    display: grid;
    gap: 0.5rem;
}

.sidebar-link {
    width: 100%;
    border: 0;
    background: transparent;
    color: #dce7fb;
    text-align: left;
    text-decoration: none;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    transition: 0.2s ease;
}

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--sidebar-soft);
    color: #fff;
}

.sidebar-button {
    cursor: pointer;
}

.sidebar-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 1rem;
    color: #9db0d3;
}

.sidebar-footer span,
.sidebar-footer strong {
    display: block;
}

.content-shell {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.4rem 1.8rem;
}

.topbar-title {
    font-size: 1.4rem;
    margin: 0;
}

.topbar-subtitle {
    margin: 0.2rem 0 0;
    color: var(--muted);
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.topbar-user-name {
    font-weight: 700;
}

.topbar-user-meta {
    color: var(--muted);
    font-size: 0.92rem;
}

.content-main {
    padding: 0 1.8rem 1.8rem;
}

.content-footer {
    margin-top: auto;
    padding: 1rem 1.8rem 1.6rem;
    color: var(--muted);
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card,
.panel-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.stat-card {
    padding: 1.25rem;
}

.stat-label {
    display: block;
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-date {
    font-size: 1rem;
}

.panel-card-header {
    padding: 1.25rem 1.25rem 0;
}

.panel-card-body {
    padding: 1.25rem;
}

.table thead th {
    background: var(--surface-alt);
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.table td,
.table th {
    padding: 0.95rem 1rem;
    white-space: nowrap;
}

.table-link {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

.table-link:hover {
    text-decoration: underline;
}

.side-badge {
    font-weight: 600;
    padding: 0.45rem 0.65rem;
}

.side-buy {
    background: rgba(25, 135, 84, 0.16);
    color: var(--success);
}

.side-sell {
    background: rgba(220, 53, 69, 0.14);
    color: var(--danger);
}

.side-close_buy,
.side-close_sell {
    background: rgba(183, 121, 31, 0.14);
    color: var(--warning);
}

.detail-grid {
    display: grid;
    grid-template-columns: minmax(140px, 180px) 1fr;
    gap: 0.9rem 1rem;
}

.detail-grid dt {
    color: var(--muted);
    font-weight: 600;
}

.detail-grid dd {
    margin: 0;
}

.payload-box {
    background: #0f1726;
    color: #d3dcef;
    border-radius: 14px;
    padding: 1rem;
    margin: 0;
    min-height: 320px;
    overflow: auto;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.info-grid span {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.info-grid strong {
    font-size: 1rem;
}

.login-page {
    background:
        radial-gradient(circle at top, rgba(31, 111, 235, 0.22), transparent 30%),
        linear-gradient(180deg, #09111f 0%, #10192b 100%);
    color: #fff;
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
}

.login-panel {
    width: min(100%, 460px);
    background: rgba(15, 23, 38, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
    padding: 2.2rem;
    backdrop-filter: blur(16px);
}

.login-title {
    margin: 1.1rem 0 0.35rem;
    font-size: 1.65rem;
}

.login-subtitle {
    color: #9db0d3;
    margin-bottom: 1.8rem;
}

.login-form .form-control,
.panel-card .form-control {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.12);
    color: inherit;
}

.login-form .form-control:focus,
.panel-card .form-control:focus {
    border-color: rgba(110, 168, 254, 0.65);
    box-shadow: 0 0 0 0.25rem rgba(31, 111, 235, 0.16);
}

.panel-card .form-label,
.login-form .form-label {
    font-weight: 600;
}

@media (max-width: 768px) {
    .app-shell {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
    }

    .topbar,
    .content-main,
    .content-footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .page-header,
    .topbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .detail-grid {
        grid-template-columns: 1fr;
        gap: 0.35rem;
    }

    .table td,
    .table th {
        white-space: normal;
    }
}