:root {
    --bg-main: #f1f5f9;
    --bg-sidebar: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #3b82f6;
    --accent-light: #eff6ff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden; /* Prevent body scroll, let iframe scroll */
}

.dashboard-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.sidebar-header {
    padding: 2rem 1.5rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 1.8rem;
}

.sidebar-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-header .subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    overflow-y: auto;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background-color: #f8fafc;
    border-color: var(--border-color);
}

.nav-btn.active {
    background-color: var(--accent-light);
    border-color: #bfdbfe;
    box-shadow: var(--shadow-sm);
}

.nav-btn .icon {
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.nav-btn.active .icon {
    background: var(--accent);
    color: white;
}

.btn-text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.btn-text .title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.nav-btn.active .title {
    color: var(--accent);
}

.btn-text .desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.avatar {
    width: 32px;
    height: 32px;
    background-color: var(--accent);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Main Content Area */
.main-content {
    flex: 1;
    position: relative;
    background-color: var(--bg-main);
}

#content-frame {
    width: 100%;
    height: 100%;
    border: none;
    background-color: white;
}

/* Dark Sidebar Overlay */
.dark-sidebar {
    background-color: #0f172a;
    border-right: 1px solid #1e293b;
    color: #f8fafc;
}

.dark-sidebar .sidebar-header {
    border-bottom: 1px solid #1e293b;
}

.dark-sidebar .sidebar-header h2 {
    color: #f8fafc;
}

.dark-sidebar .sidebar-header .subtitle {
    color: #94a3b8;
}

.dark-sidebar .sidebar-footer {
    background-color: #0b1120;
    border-top: 1px solid #1e293b;
}

.dark-sidebar .user-info {
    color: #f1f5f9;
}

.dark-sidebar .nav-btn:hover {
    background-color: #1e293b;
}

.dark-sidebar .nav-btn.active {
    background-color: #1e3a8a;
    border-color: #1e40af;
}

.dark-sidebar .nav-btn .title {
    color: #f1f5f9;
}

.dark-sidebar .nav-btn.active .title {
    color: #60a5fa;
}

.dark-sidebar .nav-btn .desc {
    color: #94a3b8;
}

.dark-sidebar .nav-btn .icon {
    background-color: #1e293b;
    color: #94a3b8;
    box-shadow: none;
}

.dark-sidebar .nav-btn.active .icon {
    background-color: #3b82f6;
    color: #ffffff;
}