/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2d5016;
    --secondary-color: #3d6b1f;
    --accent-color: #4a7c2c;
    --text-color: #333;
    --text-light: #666;
    --background: #f5f7fa;
    --white: #ffffff;
    --card-background: #ffffff;
    --border-color: #e0e0e0;
    --hover-color: #5a9e35;
    --blue-accent: #2c5f7f;
    --blue-light: #4a8fb5;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body.dark-mode {
    --text-color: #e8e8e8;
    --text-light: #b0b0b0;
    --background: #0a0a0a;
    --card-background: #1a1a1a;
    --white: #ffffff;
    --border-color: #333;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.5);
    --blue-accent: #6db3d9;
    --blue-light: #8dc9e8;
    --primary-color: #5a9e35;
    --secondary-color: #6bb03f;
    --accent-color: #7cc24d;
    --hover-color: #8dd35f;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--background);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 2.25rem;
    margin-top: 2.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

h3 {
    font-size: 1.75rem;
    margin-top: 2rem;
    color: var(--secondary-color);
}

h4 {
    font-size: 1.35rem;
    margin-top: 1.5rem;
    color: var(--text-color);
}

p {
    margin-bottom: 1.25rem;
}

strong {
    font-weight: 600;
    color: var(--primary-color);
}

em {
    font-style: italic;
}

a {
    color: var(--blue-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--blue-light);
    text-decoration: underline;
}

/* Navigation */
#nav {
    position: sticky;
    top: 0;
    background: var(--card-background);
    box-shadow: var(--shadow);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 2rem;
}

.logo {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
    letter-spacing: 0.5px;
    line-height: 1;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    flex: 1;
    justify-content: center;
    align-items: center;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-size: 1.05rem;
    font-weight: 500;
    transition: color 0.3s ease;
    line-height: 1;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.nav-links a.active {
    color: var(--accent-color);
    font-weight: 600;
}

.dark-mode-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    transition: transform 0.3s ease;
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

.dark-mode-toggle .sun {
    display: block;
}

.dark-mode-toggle .moon {
    display: none;
}

body.dark-mode .dark-mode-toggle .sun {
    display: none;
}

body.dark-mode .dark-mode-toggle .moon {
    display: block;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #3d6b1f 0%, #4a8fb5 100%);
    color: var(--white);
    padding: 6rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.hero h1 {
    color: var(--white);
    font-size: 4rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
    font-style: italic;
}

.tagline {
    font-size: 1.25rem;
    font-family: 'Georgia', 'Times New Roman', serif;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Sections */
.section {
    margin: 4rem 0;
    background: var(--card-background);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: background-color 0.3s ease;
}

.section:first-of-type {
    margin-top: 4rem;
}

.subsection {
    margin: 2rem 0;
}

.intro {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.note {
    font-style: italic;
    color: var(--text-light);
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(74, 124, 44, 0.05);
    border-left: 4px solid var(--accent-color);
    border-radius: 4px;
}

.placeholder {
    color: var(--text-light);
    font-style: italic;
}

/* Lists */
ul {
    margin: 1rem 0 1.5rem 2rem;
}

li {
    margin-bottom: 0.75rem;
}

.see-also-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.5rem;
    list-style: none;
    margin-left: 0;
}

.see-also-list li {
    padding: 0.5rem 1rem;
    background: rgba(74, 124, 44, 0.05);
    border-radius: 4px;
    border-left: 3px solid var(--accent-color);
}

/* Footer */
footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
}

footer p {
    margin: 0;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        position: relative;
    }

    .nav-toggle {
        display: block;
        order: 2;
        margin-left: auto;
    }

    .dark-mode-toggle {
        order: 3;
    }

    .logo {
        order: 1;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-background);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        box-shadow: var(--shadow);
        display: none;
        order: 4;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        padding: 0.75rem 2rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links a {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .tagline {
        font-size: 1.1rem;
    }

    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.85rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .section {
        padding: 2rem 1.5rem;
    }

    .container {
        padding: 0 1rem;
    }

    .see-also-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .section {
        padding: 1.5rem 1rem;
    }

    .nav-container {
        padding: 1rem;
    }
}

/* Smooth Scrolling Enhancement */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    #nav,
    footer {
        display: none;
    }

    .section {
        box-shadow: none;
        page-break-inside: avoid;
    }

    body {
        background: white;
    }
}