:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --bg-card: #1a1f2e;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-yellow: #f59e0b;
    --accent-purple: #8b5cf6;
    --border-color: #374151;
    --sidebar-width: 250px;
    --header-height: 60px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
}

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

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-header {
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 24px;
    color: var(--accent-blue);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    font-size: 18px;
    display: none;
}

.exchange-selector {
    padding: 16px;
}

.exchange-select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.exchange-select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.nav-item {
    margin: 2px 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active > .nav-link {
    background: var(--bg-tertiary);
    color: var(--accent-blue);
}

.nav-label {
    flex: 1;
}

.submenu-icon {
    font-size: 12px;
    transition: transform 0.2s ease;
}

.nav-item.has-submenu.open > .nav-link .submenu-icon {
    transform: rotate(180deg);
}

.submenu {
    display: none;
    padding-left: 24px;
}

.nav-item.has-submenu.open > .submenu {
    display: block;
}

.submenu-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 6px;
    font-size: 13px;
    transition: all 0.2s ease;
}

.submenu-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.submenu-link.active {
    color: var(--accent-blue);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.version-info {
    text-align: center;
    color: var(--text-muted);
    font-size: 12px;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.main-header {
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.page-title {
    font-size: 20px;
    font-weight: 600;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.exchange-badge {
    background: var(--bg-tertiary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

.update-time {
    color: var(--text-muted);
    font-size: 12px;
}

.countdown {
    color: var(--accent-blue);
    font-size: 11px;
    margin-left: 4px;
    opacity: 0.7;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.view-toggle {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 6px;
    padding: 4px;
}

.view-btn {
    background: none;
    border: none;
    padding: 8px 12px;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.view-btn:hover {
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--bg-card);
    color: var(--accent-blue);
}

.filters {
    display: flex;
    gap: 8px;
}

.filter-select {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.market-pulse {
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 24px;
    overflow-x: auto;
}

.pulse-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    white-space: nowrap;
}

.pulse-item i {
    font-size: 14px;
}

.pulse-rising i { color: var(--accent-green); }
.pulse-falling i { color: var(--accent-red); }
.pulse-neutral i { color: var(--text-muted); }
.pulse-volume i { color: var(--accent-yellow); }
.pulse-long i { color: var(--accent-green); }
.pulse-short i { color: var(--accent-red); }

.pulse-label {
    font-size: 12px;
    color: var(--text-muted);
}

.pulse-value {
    font-weight: 600;
    font-size: 14px;
}

.content-area {
    padding: 24px;
}