/* --- General Styles --- */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    color: #333;
    background-color: #fdfdfd;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex-grow: 1;
    padding: 40px 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* --- Header --- */
.main-header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo-container a {
    text-decoration: none;
    color: #333;
    font-size: 1.8em;
    font-weight: bold;
}

.logo-container .ac {
    color: #83eb57;
}

.main-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    align-items: center;
}

.main-nav li {
    margin-left: 25px;
}

.main-nav a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
    transition: color 0.3s, border-bottom-color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    color: #83eb57;
    border-bottom-color: #83eb57;
}

.btn {
    padding: 10px 25px;
    border-radius: 5px;
    text-decoration: none;
    color: #fff;
    background-color: #83eb57;
    font-weight: bold;
    transition: background-color 0.3s, transform 0.2s;
}

.btn:hover {
    background-color: #5bbd2a;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: #83eb57;
    border: 2px solid #83eb57;
}