/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-image: url('defaultbg.jpg');
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

/* ========================================
   HEADER STYLES
   ======================================== */

.header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.6) 0%, rgba(118, 75, 162, 0.6) 30%);
    border-radius: 5px;
    color: white;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    max-width: 1400px;
    width: 100%;
    margin: 20px auto 0;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(20, 20, 20, 0.8);

}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1em;
    opacity: 0.9;
}

/* ========================================
   MAIN CONTAINER (Two-Column Layout)
   ======================================== */

.container {
    display: flex;
    flex: 1;
    gap: 20px;
    padding: 20px 0px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ========================================
   SIDEBAR (LEFT COLUMN - MENU)
   ======================================== */

.sidebar {
    flex: 0 0 200px;

    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    height: fit-content;
    position: sticky;
    top: 20px;
    background-color: rgba(20, 20, 20, 0.9);
    backdrop-filter: blur(10px);
}

.menu {
    list-style: none;
}

.menu li {
    margin: 0;
    border-bottom: 1px solid #eee;
}

.menu li:last-child {
    border-bottom: none;
}

.menu a {
    display: block;
    padding: 12px 15px;
    color: #667eea;
    text-decoration: none;
    transition: all 0.3s ease;
}

.menu a:hover {
    background-color: #f0f0f0;
    padding-left: 20px;

}

.menu a:active {
    background-color: #f0f0f0;
    padding-left: 20px;

}

/* ========================================
   MAIN CONTENT AREA (RIGHT COLUMN)
   ======================================== */

.content {
    flex: 1;
    color: #aaaaaa;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    background-color: rgba(20, 20, 20, 0.9);
    backdrop-filter: blur(10px);
}

.content h2 {
    color: #667eea;
    margin-top: 20px;
    margin-bottom: 15px;
    font-size: 1.8em;
}

.content h2:first-child {
    margin-top: 0;
}

.content p {
    margin-bottom: 15px;
    text-align: justify;
}

.content section {
    margin-bottom: 30px;
}

.content section:last-child {
    margin-bottom: 0;
}

/* ========================================
   FOOTER STYLES
   ======================================== */

.footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px;
    margin-top: auto;
}

/* ========================================
   RESPONSIVE DESIGN (Mobile Devices)
   ======================================== */

@media (max-width: 768px) {
    .container {
        flex-direction: column;
        gap: 15px;
        padding: 15px 0px;
    }

    .sidebar {
        flex: 0 0 auto;
        position: static;
    }

    .header {
        padding: 20px 15px;
    }

    .header h1 {
        font-size: 1.8em;
    }

    .header p {
        font-size: 1em;
    }

    .content {
        padding: 20px;
    }
}