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

body {
    background-color: #0f172a; /* Deep slate dark mode */
    color: #f8fafc;
    height: 100vh;
    overflow: hidden;
}

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

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    z-index: 30;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    transform: translateX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.logo {
    padding: 0 24px 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #38bdf8 0%, #3b82f6 100%);
    border-radius: 6px;
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

.logo h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #f8fafc;
    letter-spacing: 0.5px;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 0 16px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    color: #94a3b8;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.04);
    color: #f8fafc;
    transform: translateX(4px);
}

.nav-item.active {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    color: #38bdf8;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.nav-item.active .icon {
    filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.5));
}

.nav-item .icon {
    font-size: 1.25rem;
    margin-right: 14px;
    transition: filter 0.2s ease;
}

.nav-item .text {
    font-weight: 500;
    font-size: 0.95rem;
}

.sidebar-footer {
    padding: 24px;
    font-size: 0.8rem;
    color: #64748b;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Main Content Area */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #020617;
    position: relative;
    margin-left: 280px;
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.content-area.expanded {
    margin-left: 0;
}

/* Menu Button */
.menu-btn {
    background: transparent;
    border: none;
    color: #f8fafc;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 8px;
    transition: background 0.2s;
}

.menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Top Navigation Bar */
.topbar {
    height: 76px;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 10;
}

.topbar h1 {
    font-size: 1.25rem;
    font-weight: 500;
    color: #f8fafc;
}

.user-profile img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid #1e293b;
    cursor: pointer;
}

/* Iframe Container */
.iframe-container {
    flex: 1;
    padding: 24px;
    overflow: hidden;
    position: relative;
}

#app-frame {
    width: 100%;
    height: 100%;
    border-radius: 16px;
    background: #0f172a;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    transform: translateY(0);
}

/* Animation classes for switching tabs */
.fade-out {
    opacity: 0 !important;
    transform: translateY(10px) !important;
}