:root {
    --primary: #0052cc;
    --secondary: #003d99;
    --accent: #4c84ff;
    --success: #00c896;
    --warning: #f59e0b;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --glass: rgba(255, 255, 255, 0.9);
    --border: #e2e8f0;
    --blue-light: #e8f0fe;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
}

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

/* Sidebar */
.app-sidebar {
    width: 280px;
    background: var(--card-bg);
    color: var(--text-main);
    border-right: 1px solid var(--border);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.app-logo {
    margin-bottom: 40px;
    text-align: center;
}
.app-logo img {
    max-width: 140px;
}

.nav-menu {
    list-style: none;
    flex-grow: 1;
}

.nav-menu li {
    margin-bottom: 5px;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 8px;
    transition: 0.3s;
    font-weight: 600;
    font-size: 0.95rem;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--blue-light);
    color: var(--primary);
}

.nav-menu i {
    width: 20px;
    font-size: 1.1rem;
    text-align: center;
}

.sidebar-user-info {
    margin-top: auto; 
    padding-top: 20px; 
    border-top: 1px solid var(--border);
}

.sidebar-user-name {
    font-weight: 700; 
    font-size: 0.9rem; 
    color: var(--text-main);
}

.sidebar-user-status {
    font-size: 0.8rem; 
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 5px;
}
.sidebar-user-status::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
}

.app-main {
    flex-grow: 1;
    margin-left: 280px;
    padding: 40px;
}

.page-header {
    margin-bottom: 40px;
}

.page-header h1 {
    font-weight: 800;
    font-size: 2.2rem;
    color: var(--text-main);
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.page-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 800px;
}

/* Responsividade Básica */
@media (max-width: 900px) {
    .app-sidebar {
        display: none;
    }
    .app-main {
        margin-left: 0;
        padding: 20px;
    }
}