:root {
    --primary-green: #4ade80;
    --primary-green-dark: #22c55e;
    --primary-green-light: #86efac;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-green);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-green-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(74, 222, 128, 0.4);
}

.btn-secondary {
    background-color: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background-color: var(--gray-300);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-selected {
    border: 2px solid var(--primary-green);
    background-color: var(--primary-green-light);
}

/* Form */
.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 14px;
    transition: border 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.1);
}

/* Navbar */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    text-decoration: none;
}

.navbar-brand img {
    height: 40px;
}

/* Sidebar */
.sidebar {
    background: var(--white);
    width: 250px;
    min-height: 100vh;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li a {
    display: block;
    padding: 12px 20px;
    color: var(--gray-700);
    text-decoration: none;
    transition: all 0.3s ease;
}

.sidebar-menu li a:hover,
.sidebar-menu li a.active {
    background-color: var(--primary-green-light);
    color: var(--primary-green-dark);
    border-left: 4px solid var(--primary-green);
}

/* Container Layout */
.container-fluid {
    display: flex;
}

.main-content {
    flex: 1;
    padding: 30px;
}

/* Checkmark */
.checkmark {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-color: var(--primary-green);
    border-radius: 50%;
    color: white;
    text-align: center;
    line-height: 24px;
    font-size: 16px;
}

/* Grid */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}