:root {
    /* Colors - Nature inspired palette (Greens, Earth tones, Clean Whites) */
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-surface-alt: #e9ecef;
    --color-text: #2c3e50;
    --color-text-muted: #6c757d;
    --color-primary: #2d6a4f;
    /* Deep Forest Green */
    --color-primary-hover: #1b4332;
    --color-accent: #d8f3dc;
    /* Light Green */
    --color-border: #dee2e6;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    /* Layout */
    --container-width: 1200px;
    --border-radius: 12px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn.primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hidden {
    display: none !important;
}

/* Header */
.header {
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 500;
}

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

/* Hero */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-accent) 100%);
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

/* Sections */
.section {
    padding: var(--spacing-lg) 0;
}

.section.alt-bg {
    background-color: var(--color-surface-alt);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--color-text-muted);
}

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.card {
    background: var(--color-surface);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--color-border);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Article Cards specific */
.article-card {
    cursor: pointer;
}

.card-img {
    height: 200px;
    background-color: var(--color-surface-alt);
    object-fit: cover;
    width: 100%;
}

.card-content {
    padding: var(--spacing-sm);
}

.card h3 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.25rem;
}

.card p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-accent);
    color: var(--color-primary);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Tip Cards specific */
.tip-card {
    cursor: pointer;
    position: relative;
    height: 100%;
}

.tip-card::after {
    content: 'Read More';
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tip-card:hover::after {
    opacity: 1;
}


/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.modal-content {
    background-color: var(--color-surface);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: var(--shadow-md);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close-btn {
    color: var(--color-text);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: var(--color-primary);
}

/* Reader View */
.reader-view {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg);
    overflow-y: auto;
    z-index: 200;
    animation: fadeIn 0.3s ease;
}

.reader-container {
    max-width: 800px;
    /* Optimal reading width */
    padding: var(--spacing-lg) var(--spacing-sm);
    margin: 0 auto;
}

.back-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-weight: 500;
    transition: color 0.2s ease;
}

.back-btn:hover {
    color: var(--color-primary);
}

/* Reader Content Typography */
.reader-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.reader-header h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.reader-meta {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.reader-img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.reader-body {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
}

.reader-body h2 {
    font-size: 2rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.reader-body p {
    margin-bottom: var(--spacing-md);
}

.reader-body ul {
    list-style: disc;
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.reader-body li {
    margin-bottom: 0.5rem;
}

.reader-body a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.reader-body a:hover {
    background-color: var(--color-accent);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Resource List */
.resource-list {
    display: grid;
    gap: var(--spacing-sm);
}

.resource-item {
    background: var(--color-surface);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--color-border);
    transition: background 0.2s ease;
}

.resource-item:hover {
    background-color: var(--color-accent);
}

.resource-info h3 {
    font-size: 1.1rem;
    margin-bottom: 0.2rem;
}

.resource-info p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Footer */
.footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    background-color: var(--color-primary);
    color: white;
    margin-top: var(--spacing-lg);
}

@media (max-width: 768px) {
    .reader-header h1 {
        font-size: 2.25rem;
    }

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

    .nav-links {
        display: none;
        /* Mobile menu todo */
    }
}