:root {
    --primary: #9f58db;
    --primary-hover: #8646b9;
    --pastel: #f8dfcc;
    --bg: #f4f1f7;
    --card: #ffffff;
    --text: #2d1b3e;
    --border: #e2d7ed;
}

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    margin: 0; 
    display: flex; 
    min-height: 100vh; 
    background: var(--bg); 
    color: var(--text);
}

nav { 
    width: 260px; 
    background: var(--card); 
    border-right: 1px solid var(--border); 
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

nav .logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); margin-bottom: 20px; padding-left: 10px; }

nav button { 
    width: 100%; 
    padding: 12px 16px; 
    border: none; 
    background: transparent; 
    text-align: left; 
    cursor: pointer; 
    color: var(--text);
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.2s;
}

nav button:hover { background: var(--pastel); color: var(--primary); }
nav button.active { background: var(--primary); color: #fff; }

main { flex: 1; padding: 40px; }

.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }

.btn-primary { 
    background: var(--primary); 
    color: #fff; 
    padding: 12px 24px; 
    border: none; 
    border-radius: 8px; 
    cursor: pointer; 
    font-weight: 600;
    transition: background 0.2s;
}

.btn-primary:hover { background: var(--primary-hover); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; transition: transform 0.2s; }
.card:hover { transform: translateY(-3px); box-shadow: 0 4px 12px rgba(0,0,0,0.05); }

.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.3); display: flex; justify-content: center; align-items: center; backdrop-filter: blur(4px); }
.modal-content { background: var(--card); padding: 30px; border-radius: 16px; width: 90%; max-width: 600px; max-height: 90vh; overflow-y: auto; box-shadow: 0 10px 25px rgba(0,0,0,0.1); }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--text); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); }

@media (max-width: 600px) {
    body { flex-direction: column; }
    nav { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
    main { padding: 20px; }
}