/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Countryside Green Palette */
    --primary-green: #2d5016;
    --primary-green-light: #4a7c2c;
    --primary-green-lighter: #6b9d3a;
    --accent-green: #8bc34a;
    --accent-green-light: #aed581;

    /* Neutral Colors */
    --white: #ffffff;
    --off-white: #fafafa;
    --light-gray: #f5f5f5;
    --gray: #e0e0e0;
    --medium-gray: #9e9e9e;
    --dark-gray: #424242;
    --black: #1a1a1a;

    /* Semantic Colors */
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;
    --info: #2196f3;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--off-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--black);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
}

h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--primary-green);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-green-lighter);
}

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

/* ===================================
   Layout Components
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--medium-gray);
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   Header
   =================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-green);
}

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

.nav-link {
    font-weight: 500;
    color: var(--dark-gray);
    transition: color var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-green);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--primary-green);
}

.nav-link:hover::after {
    width: 100%;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    color: var(--white);
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><path d="M10 10h80v80H10z" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="1"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    line-height: 1.7;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.feature-badge .icon {
    width: 20px;
    height: 20px;
}

/* ===================================
   Introduction Section
   =================================== */
.intro-section {
    padding: var(--spacing-xl) 0;
    background: var(--white);
}

.intro-content {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.0625rem;
    line-height: 1.8;
}

/* ===================================
   Calculator Section
   =================================== */
.calculator-section {
    padding: var(--spacing-2xl) 0;
    background: var(--light-gray);
}

.calculator-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    margin: 0 auto;
}

.calculator-form {
    margin-bottom: var(--spacing-xl);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--gray);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all var(--transition-base);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(45, 80, 22, 0.1);
}

.input-hint {
    font-size: 0.875rem;
    color: var(--medium-gray);
    margin-top: var(--spacing-xs);
}

.btn-calculate {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-green-light) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-calculate:active {
    transform: translateY(0);
}

.btn-calculate .icon {
    width: 24px;
    height: 24px;
}

/* ===================================
   Result Container
   =================================== */
.result-container {
    background: linear-gradient(135deg, #f0f7ed 0%, #e8f5e9 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 2px solid var(--accent-green-light);
}

.result-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    color: var(--primary-green);
}

.result-header .icon {
    width: 28px;
    height: 28px;
}

.result-header h3 {
    margin: 0;
    color: var(--primary-green);
}

.result-main {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--accent-green-light);
}

.result-label {
    display: block;
    font-size: 1rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-green);
    font-family: var(--font-display);
}

.result-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.result-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-md);
}

.result-item-label {
    display: block;
    font-size: 0.875rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xs);
}

.result-item-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green-light);
}

.result-disclaimer {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--dark-gray);
    line-height: 1.6;
    margin: 0;
}

.result-disclaimer .icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--primary-green);
}

/* ===================================
   FAQ Section
   =================================== */
.faq-section {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: var(--spacing-md);
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--black);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.faq-question:hover {
    color: var(--primary-green);
}

.faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    transition: transform var(--transition-base);
    color: var(--primary-green);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
    color: var(--dark-gray);
    line-height: 1.8;
    margin: 0;
}

/* ===================================
   SEO Content Section
   =================================== */
.seo-section {
    padding: var(--spacing-2xl) 0;
    background: var(--light-gray);
}

.seo-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.seo-content h2 {
    color: var(--primary-green);
    border-bottom: 3px solid var(--accent-green-light);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.seo-content h3 {
    color: var(--primary-green-light);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.seo-content p {
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--primary-green);
    color: var(--white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo {
    height: 40px;
    filter: brightness(0) invert(1);
}

.footer-logo .logo-text {
    color: var(--white);
}

.footer-description {
    opacity: 0.9;
    line-height: 1.7;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    color: var(--white);
    opacity: 0.9;
    transition: opacity var(--transition-base);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--accent-green-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    opacity: 0.8;
    font-size: 0.9375rem;
}

.footer-disclaimer {
    font-size: 0.875rem !important;
    margin-top: var(--spacing-sm) !important;
}

/* ===================================
   Icons
   =================================== */
.icon {
    display: inline-block;
    vertical-align: middle;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero {
        padding: var(--spacing-xl) 0;
    }

    .hero-features {
        flex-direction: column;
        align-items: center;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .result-details {
        grid-template-columns: 1fr;
    }

    .result-value {
        font-size: 2.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .calculator-card,
    .seo-content {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .logo-text {
        display: none;
    }

    .result-value {
        font-size: 2rem;
    }

    .result-item-value {
        font-size: 1.25rem;
    }
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.result-container {
    animation: fadeIn 0.5s ease;
}

/* ===================================
   Print Styles
   =================================== */
@media print {

    .header,
    .footer,
    .nav,
    .btn-calculate {
        display: none;
    }

    .result-container {
        border: 2px solid var(--black);
    }
}



/* ===================================
   Mobile Menu Additions
   =================================== */
.mobile-menu-toggle {
    display: none;
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        padding: 0.5rem;
        z-index: 1001;
    }

    .bar {
        display: block;
        width: 25px;
        height: 3px;
        margin: 5px auto;
        transition: all 0.3s ease-in-out;
        background-color: var(--primary-green);
    }

    .nav {
        display: flex !important;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: var(--shadow-md);
        padding: 1rem 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease-in-out;
        z-index: 999;
    }

    .nav.nav-active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        text-align: center;
        padding: 1rem 0;
        display: block;
    }

    /* Hamburger animation */
    .mobile-menu-toggle.is-active .bar:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.is-active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .mobile-menu-toggle.is-active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

/* ===================================
   Blog Section
   =================================== */
.blog-section {
    padding: var(--spacing-2xl) 0;
    background: var(--off-white);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 1200px) {
    .blog-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.blog-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.blog-image-wrapper {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.blog-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-image {
    transform: scale(1.05);
}

.blog-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-meta {
    font-size: 0.8rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-xs);
    display: flex;
    justify-content: space-between;
}

.blog-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    flex-grow: 1;
}

.blog-card-link {
    text-decoration: none;
    color: inherit;
}

.blog-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.btn-blog {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-base);
}

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

.blog-loader {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--medium-gray);
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: var(--primary-green);
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-sm);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}