@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
    --primary-color: #4f46e5;
    --secondary-color: #007bff;
    --background-color: #f0f2f5;
    --card-bg-color: #ffffff;
    --text-color-dark: #212529;
    --text-color-light: #6c757d;
    --border-color: #dee2e6;
    --hover-shadow: rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color-dark);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 16px;
}

/* Nav Bar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-logo {
    font-weight: 900;
    font-size: 1.6rem;
    letter-spacing: -0.05em;
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.navbar-logo:hover {
    color: var(--secondary-color);
}

.navbar-links {
    display: none;
    gap: 1.8rem;
}

.navbar-links a {
    color: var(--text-color-dark);
    font-weight: 600;
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

.navbar-links a:hover {
    color: var(--primary-color);
}

.navbar-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: -8px;
    left: 0;
    background-color: var(--secondary-color);
    transition: width 0.3s ease-in-out;
}

.navbar-links a:hover::after {
    width: 100%;
}

.mobile-menu-icon {
    display: block;
    cursor: pointer;
    font-size: 1.7rem;
    color: var(--primary-color);
}

@media (min-width: 768px) {
    .navbar-links {
        display: flex;
    }

    .mobile-menu-icon {
        display: none;
    }
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--card-bg-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem 0;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.dropdown-menu a {
    padding: 0.75rem 0;
    width: 80%;
    text-align: center;
    text-decoration: none;
    color: var(--text-color-dark);
    font-weight: 500;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.dropdown-menu a:hover {
    background-color: var(--background-color);
    color: var(--primary-color);
}

.dropdown-menu.active {
    display: flex;
}

/* Common Content & Button Styles */
.page-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 3rem;
    background-color: var(--card-bg-color);
    border-radius: 1rem;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    animation: fadeIn 1s ease-in-out;
}

.page-container h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1.5rem;
}

.page-container h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-top: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.page-container h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 1.5rem;
}

.page-container h4 {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-top: 1rem;
}

.page-container p,
.page-container ul,
.page-container ol {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-color-dark);
}

.page-container ol,
.page-container ul {
    padding-left: 25px;
}

.page-container li {
    margin-bottom: 0.5rem;
}

.page-container strong {
    color: var(--primary-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.8rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px var(--hover-shadow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.footer {
    text-align: center;
    padding: 2.5rem 0;
    font-size: 0.9rem;
    color: var(--text-color-light);
    border-top: 1px solid var(--border-color);
    margin-top: 5rem;
    background-color: var(--card-bg-color);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}