:root {
    --bg-color: #ffffff;
    --surface-color: #f4f4f4;
    --surface-hover: #e0e0e0;
    --primary: #0078D7;
    --primary-hover: #005A9E;
    --secondary: #603cba;
    --success: #107C10;
    --success-bg: rgba(16, 124, 16, 0.1);
    --warning: #FF8C00;
    --warning-bg: rgba(255, 140, 0, 0.1);
    --danger: #E81123;
    --danger-bg: rgba(232, 17, 35, 0.1);
    --info: #0078D7;
    --info-bg: rgba(0, 120, 215, 0.1);
    --text-primary: #000000;
    --text-secondary: #505050;
    --border: #cccccc;
    --glass-blur: 0px;
    --shadow-sm: none;
    --shadow-md: none;
    --shadow-lg: none;
    --transition: none;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Background Effects */
.bg-glow {
    display: none;
}

.bg-glow-secondary {
    display: none;
}

/* Glassmorphism Panel (Replaced by flat tiles) */
.glass-panel {
    background: var(--surface-color);
    border: 2px solid var(--border);
    border-radius: 0;
    box-shadow: none;
}

/* Layout */
.layout {
    display: flex;
    min-height: 100vh;
    transition: var(--transition);
}

.layout.login-mode #sidebar {
    display: none;
}

.layout.login-mode #main-content {
    margin-left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

/* Sidebar */
.sidebar {
    width: 220px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--surface-color);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
}

.logo-icon {
    background: var(--primary);
    width: 36px;
    height: 36px;
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: none;
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0;
    transition: none;
    font-size: 0.9rem;
}

.nav-item:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--surface-hover);
    color: var(--primary);
    border-left: 4px solid var(--primary);
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--surface-hover);
}

.connection-status {
    margin-bottom: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 0;
}

.status-dot.connected { background: var(--success); }
.status-dot.disconnected { background: var(--danger); }

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 0;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.user-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.user-name { font-size: 0.9rem; font-weight: 500; }
.user-role { font-size: 0.75rem; color: var(--text-secondary); text-transform: capitalize; }

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: var(--transition);
}

.icon-btn:hover { background: var(--surface-hover); color: var(--danger); }

/* Main Content */
#main-content {
    flex: 1;
    margin-left: 220px;
    padding: 1.5rem;
    transition: none;
}

.page-container {
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 600;
}

.hidden { display: none !important; }

/* Components */
.card {
    background: var(--surface-color);
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 1.5rem;
    box-shadow: none;
}

.card:hover {
    border-color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 0;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: none;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}
.btn-secondary:hover { background: var(--surface-hover); }

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}
.btn-danger:hover { background: var(--danger); color: white; }

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    border-radius: 0;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%2394a3b8%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem top 50%;
    background-size: 0.65rem auto;
    padding-right: 2.5rem;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: 0;
    border: 1px solid var(--border);
    background: var(--surface-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.table th, .table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.table th {
    background: rgba(0, 0, 0, 0.3);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.table tbody tr:last-child td { border-bottom: none; }

/* Login Page specific */
.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
    text-align: center;
}

.login-header {
    margin-bottom: 2rem;
}

.login-header .logo-icon {
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
    margin: 0 auto 1rem;
}

.login-error {
    color: var(--danger);
    background: var(--danger-bg);
    padding: 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    display: none;
}

/* Dashboard specific */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    flex-direction: column;
}

.stat-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dashboard-panels {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.panel-header {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
}

.live-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.live-data-table th, .live-data-table td {
    padding: 0.25rem 0.5rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.live-data-table th {
    background: var(--surface-color);
    font-weight: 600;
    color: var(--text-secondary);
    position: sticky;
    top: 0;
}

.live-data-table tr {
    transition: background-color 0.1s;
}

.live-data-table tr.flash-up { background-color: var(--success-bg); }
.live-data-table tr.flash-down { background-color: var(--danger-bg); }

.inst-symbol { font-weight: 600; }
.inst-token { color: var(--text-secondary); font-family: monospace; }
.inst-price { font-weight: 700; font-family: monospace; }

.activity-feed {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}
.activity-item:last-child { border-bottom: none; }
.act-time { color: var(--text-secondary); margin-right: 0.5rem; font-family: monospace; }
.act-msg { color: var(--text-primary); }

/* Badges */
.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}
.badge.error { background: var(--danger-bg); color: var(--danger); }
.badge.warn { background: var(--warning-bg); color: var(--warning); }
.badge.info { background: var(--info-bg); color: var(--info); }
.badge.success { background: var(--success-bg); color: var(--success); }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    transform: translateY(0);
    transition: transform 0.3s;
}

.modal-overlay.hidden .modal-content { transform: translateY(20px); }

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
.modal-title { font-size: 1.25rem; font-weight: 600; }
.modal-close { background: none; border: none; color: var(--text-secondary); font-size: 1.5rem; cursor: pointer; }

/* Toasts */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--surface-color);
    backdrop-filter: blur(8px);
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    font-size: 0.9rem;
    animation: slideInRight 0.3s ease-out forwards;
    opacity: 0;
    transform: translateX(100%);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }

.toast.fade-out {
    animation: slideOutRight 0.3s ease-in forwards;
}

@keyframes slideInRight { to { opacity: 1; transform: translateX(0); } }
@keyframes slideOutRight { to { opacity: 0; transform: translateX(100%); } }

/* Loaders */
.loader {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toolbar */
.toolbar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.toolbar .form-control {
    width: auto;
    min-width: 200px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}
.page-btn {
    padding: 0.5rem 0.75rem;
    background: var(--surface-color);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    cursor: pointer;
}
.page-btn:hover:not(:disabled) { background: var(--surface-hover); }
.page-btn.active { background: var(--primary); border-color: var(--primary); }
.page-btn:disabled { opacity: 0.5; cursor: not-allowed; }

@media (max-width: 768px) {
    .layout:not(.login-mode) #sidebar { transform: translateX(-100%); }
    .layout:not(.login-mode) #main-content { margin-left: 0; }
    .dashboard-panels { grid-template-columns: 1fr; }
}