/* 
========================================================================
GROW A GARDEN CALCULATOR - PREMIUM STYLE SYSTEM
========================================================================
Description: Modern, premium botanical design theme. Fully responsive, 
             SEO-friendly, high-performance, and ready for AdSense.
========================================================================
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* --- CSS Variables & Theme Engine --- */
:root {
  /* Font Families */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Border Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  /* Light Mode Colors (Botanical Theme) */
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --primary: #1b4332;
  --primary-hover: #2d6a4f;
  --primary-light: #d8f3dc;
  
  --secondary: #40916c;
  --secondary-hover: #52b788;
  
  --accent: #ffb703;
  --accent-light: #fef3c7;
  
  --border-color: #e2e8f0;
  --input-bg: #ffffff;
  
  --success: #2ec4b6;
  --danger: #e63946;
  --warning: #ffb703;
  
  --nav-bg: rgba(255, 255, 255, 0.85);
  --nav-border: rgba(241, 245, 249, 0.8);
  
  --card-glow: rgba(27, 67, 50, 0.03);
}

[data-theme="dark"] {
  /* Dark Mode Colors (Forest Obsidian) */
  --bg-primary: #0b0f19;
  --bg-secondary: #131a2c;
  --bg-tertiary: #1e293b;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --primary: #52b788;
  --primary-hover: #74c69d;
  --primary-light: #1b4332;
  
  --secondary: #40916c;
  --secondary-hover: #2d6a4f;
  
  --accent: #ffb703;
  --accent-light: #332a15;
  
  --border-color: #1e293b;
  --input-bg: #1e293b;
  
  --nav-bg: rgba(11, 15, 25, 0.85);
  --nav-border: rgba(30, 41, 59, 0.8);
  
  --card-glow: rgba(82, 183, 136, 0.03);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.25rem;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 4px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
  margin-top: 0.5rem;
  transition: background-color var(--transition-normal);
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.text-center {
  text-align: center;
}

.highlight-green {
  color: var(--primary);
}

/* --- App Layout Elements --- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Premium Navigation Header --- */
header.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nav-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo-wrapper a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  border-radius: 8px;
  font-size: 1.2rem;
  box-shadow: var(--shadow-sm);
}

nav.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

nav.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.95rem;
  position: relative;
  padding: 0.25rem 0;
}

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

nav.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: width var(--transition-fast);
}

nav.nav-links a:hover::after, nav.nav-links a.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle Custom Switch */
.theme-toggle-btn {
  background: none;
  border: 1px solid var(--border-color);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--primary);
  border-color: var(--primary);
}

.theme-toggle-btn svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: currentColor;
}

.sun-icon {
  display: none;
}

[data-theme="dark"] .sun-icon {
  display: block;
}

[data-theme="dark"] .moon-icon {
  display: none;
}

/* CTA Header button */
.header-cta {
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid transparent;
}

.header-cta:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.5rem;
}

/* --- Hero Section --- */
.hero-section {
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 400px;
  background: radial-gradient(circle, var(--card-glow) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-subtitle {
  text-transform: uppercase;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--secondary);
  margin-bottom: 0.75rem;
}

.hero-description {
  font-size: 1.15rem;
  max-width: 720px;
  margin: 0 auto 2.5rem;
  color: var(--text-secondary);
}

/* --- Breadcrumb Navigation --- */
.breadcrumb-container {
  margin: 1rem auto;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumbs a {
  color: var(--text-secondary);
}

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

.breadcrumbs .separator::after {
  content: '/';
  margin-left: 0.25rem;
}

.breadcrumbs .current {
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Premium Tool Layout --- */
.calculator-wrapper {
  display: grid;
  grid-template-columns: 1.1fr 1.2fr;
  gap: 2.5rem;
  margin: 2rem 0 5rem;
}

.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.calculator-title {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.calculator-title svg {
  color: var(--primary);
}

/* Form Styling */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full-width {
  grid-column: span 2;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-with-badge {
  position: relative;
  display: flex;
  align-items: center;
}

input[type="number"], select, input[type="text"], input[type="email"], textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--input-bg);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-normal);
  outline: none;
}

input[type="number"]:focus, select:focus, input[type="text"]:focus, input[type="email"]:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.input-badge {
  position: absolute;
  right: 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
}

.input-with-badge input {
  padding-right: 3.5rem;
}

/* Form Actions Button */
.form-actions {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  margin-top: 1.75rem;
}

.btn {
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--transition-normal);
  border: none;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

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

/* Error validation styling */
.error-msg {
  color: var(--danger);
  font-size: 0.8rem;
  margin-top: 0.25rem;
  display: none;
}

.form-group.has-error input {
  border-color: var(--danger);
}

.form-group.has-error .error-msg {
  display: block;
}

/* Results Panel Styling */
.results-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.result-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: background-color var(--transition-normal);
}

.result-card.full-width {
  grid-column: span 2;
}

.result-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.result-label svg {
  color: var(--primary);
}

.result-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.result-subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Interactive Raised Bed Visualizer Mock */
.viz-container {
  grid-column: span 2;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  background-color: var(--bg-tertiary);
  margin-top: 1rem;
}

.viz-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.viz-grid {
  display: grid;
  gap: 6px;
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  max-height: 200px;
  overflow-y: auto;
  align-items: center;
  justify-content: center;
}

.viz-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--secondary);
  border: 2px solid var(--primary-light);
  display: inline-block;
  animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

/* Empty State Results */
.results-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--text-muted);
  gap: 1rem;
  padding: 3rem 0;
}

.results-empty-state svg {
  font-size: 3rem;
  color: var(--border-color);
}

/* --- SEO Content Styling --- */
.seo-content-section {
  padding: 4rem 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 2.8fr 1.2fr;
  gap: 3rem;
}

.seo-rich-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.seo-rich-text h2 {
  margin: 2.5rem 0 1.25rem;
  color: var(--text-primary);
  display: block;
}

.seo-rich-text h3 {
  margin: 1.75rem 0 1rem;
  color: var(--text-primary);
}

.seo-rich-text p {
  margin-bottom: 1.5rem;
}

.seo-rich-text ul, .seo-rich-text ol {
  margin: 0 0 1.5rem 1.5rem;
}

.seo-rich-text li {
  margin-bottom: 0.5rem;
}

/* Table of Contents Box */
.toc-box {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0 2.5rem;
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.toc-list {
  list-style: none !important;
  margin: 0 !important;
}

.toc-list li {
  margin-bottom: 0.5rem;
}

.toc-list li.toc-h3 {
  padding-left: 1.25rem;
  font-size: 0.95rem;
}

.toc-list a {
  color: var(--text-secondary);
}

.toc-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* Info Box / Alert Banner inside SEO articles */
.info-box {
  background-color: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 2rem 0;
  color: var(--primary);
}

.info-box p {
  margin-bottom: 0;
  color: var(--primary);
  font-weight: 500;
}

/* Featured Images */
.featured-image-container {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
  aspect-ratio: 16 / 9;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.featured-image-container svg {
  width: 4rem;
  height: 4rem;
  color: var(--text-muted);
  opacity: 0.3;
}

.article-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Meta metadata display for articles */
.article-meta-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* FAQ Accordion */
.faq-container {
  margin: 3rem 0;
}

.faq-item {
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform var(--transition-normal);
  color: var(--primary);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

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

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* Sidebar Ads / Widgets */
.sidebar-sticky {
  position: sticky;
  top: 6rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.sidebar-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

/* AdSense Mock Area */
.adsense-placeholder {
  background-color: var(--bg-tertiary);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  min-height: 250px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.adsense-placeholder::before {
  content: 'ADVERTISEMENT';
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

/* --- Call To Action Section --- */
.cta-banner {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 4rem 3rem;
  text-align: center;
  box-shadow: var(--shadow-xl);
  margin: 4rem 0;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
  transform: rotate(30deg);
  pointer-events: none;
}

.cta-banner h2 {
  color: #ffffff;
  margin-bottom: 1rem;
}

.cta-banner h2::after {
  background-color: var(--accent);
  margin: 0.5rem auto 0;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 1.1rem;
}

.cta-btn {
  background-color: var(--accent);
  color: var(--text-primary);
  border: 1px solid transparent;
  font-weight: 700;
}

.cta-btn:hover {
  background-color: #ffc300;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* --- Related Articles Card Grid --- */
.related-articles-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

.section-header {
  margin-bottom: 2.5rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-img-wrapper {
  position: relative;
  aspect-ratio: 16 / 10;
  background-color: var(--bg-tertiary);
  overflow: hidden;
}

.card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.article-card:hover .card-img-wrapper img {
  transform: scale(1.05);
}

.card-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.article-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.article-card-title a:hover {
  color: var(--primary);
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.article-card-link:hover {
  color: var(--primary-hover);
}

/* --- Search & Filter System for Blog Page --- */
.blog-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.search-box-wrapper {
  position: relative;
  flex-grow: 1;
  max-width: 450px;
}

.search-box-wrapper input {
  padding-left: 2.5rem;
}

.search-icon-svg {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 1.1rem;
  height: 1.1rem;
}

.category-filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* --- Core Pages Specific Layouts --- */

/* Contact Page Form & Layout */
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  margin: 3rem 0;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-detail-card {
  display: flex;
  gap: 1rem;
}

.contact-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-detail-text h4 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.contact-detail-text p {
  margin: 0;
  font-size: 0.95rem;
}

.success-alert {
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  display: none;
}

/* --- Premium Footer --- */
footer.main-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 2rem;
  margin-top: 5rem;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-column h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: 0.75rem;
}

.footer-column ul li a {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.footer-column ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-about-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-btn {
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-btn:hover {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.social-btn svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

.newsletter-form input {
  padding: 0.625rem 0.875rem;
}

.newsletter-form button {
  padding: 0.625rem 1.25rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-legal-links {
  display: flex;
  gap: 1.5rem;
}

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

/* --- Animations --- */
@keyframes scaleUp {
  from {
    transform: scale(0);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

/* --- Responsive Media Queries --- */
@media (max-width: 1024px) {
  h1 {
    font-size: 2.2rem;
  }
  .calculator-wrapper {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .article-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  .container {
    padding: 0 1rem;
  }
  .nav-links {
    display: none !important; /* Managed by mobile drawer script later */
  }
  .header-actions .header-cta {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero-section {
    padding: 3.5rem 0 2.5rem;
  }
  h1 {
    font-size: 1.8rem;
  }
  h2 {
    font-size: 1.5rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-group.full-width {
    grid-column: span 1;
  }
  .form-actions {
    grid-template-columns: 1fr;
  }
  .results-grid {
    grid-template-columns: 1fr;
  }
  .result-card.full-width {
    grid-column: span 1;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
  .cta-banner {
    padding: 2.5rem 1.5rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .footer-legal-links {
    justify-content: center;
  }
}