/* ==========================================================================
   CreatorTax India — Modern CSS Design System
   Optimized for Fast Loading, Mobile Responsiveness, SEO & Google AdSense
   ========================================================================== */

:root {
  /* Brand Color Palette */
  --color-primary: #1e3a8a;       /* Deep Trust Navy Blue */
  --color-primary-light: #3b82f6; /* Modern Vibrant Blue */
  --color-primary-dark: #0f172a;  /* Rich Dark Slate */
  --color-accent: #059669;        /* Tax Savings Emerald Green */
  --color-accent-light: #10b981;
  --color-accent-bg: #ecfdf5;
  --color-warning: #d97706;       /* Amber Warning */
  --color-warning-bg: #fffbeb;
  --color-purple: #7c3aed;        /* International USD / Remittance */
  --color-purple-bg: #f5f3ff;
  --color-danger: #dc2626;        /* Tax Penalty / Notice */
  --color-danger-bg: #fef2f2;

  /* Neutrals & Surfaces */
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --bg-surface-elevated: #ffffff;
  --border-color: #e2e8f0;
  --border-color-dark: #cbd5e1;

  /* Typography Colors */
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --text-inverse: #ffffff;

  /* Typography Scale */
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Spacing */
  --container-max: 1200px;
  --container-prose: 760px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-body);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  color: var(--text-main);
}

img, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

button, input, select, textarea {
  font: inherit;
}

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 1rem;
}

/* Reading Progress Bar */
#reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-accent));
  width: 0%;
  z-index: 1000;
  transition: width 0.1s ease;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-prose {
  width: 100%;
  max-width: var(--container-prose);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Announcement Banner */
.announcement-bar {
  background: linear-gradient(90deg, #0f172a 0%, #1e3a8a 100%);
  color: #ffffff;
  padding: 0.5rem 1rem;
  font-size: 0.84rem;
  font-weight: 500;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.announcement-bar a {
  color: #93c5fd;
  text-decoration: underline;
  margin-left: 0.35rem;
  font-weight: 600;
}
.announcement-bar a:hover {
  color: #ffffff;
}

/* Site Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 900;
  transition: box-shadow var(--transition-normal);
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.025em;
}
.brand-logo svg {
  width: 34px;
  height: 34px;
}
.brand-logo .brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  background-color: #dbeafe;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  margin-left: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color var(--transition-fast);
  position: relative;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  text-align: center;
}
.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}
.btn-lg {
  padding: 0.85rem 1.65rem;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(30, 58, 138, 0.2);
}
.btn-primary:hover {
  background-color: #172554;
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(30, 58, 138, 0.3);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-alt);
  border-color: var(--border-color-dark);
  color: var(--color-primary);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(5, 150, 105, 0.25);
}
.btn-accent:hover {
  background-color: #047857;
  color: #ffffff;
  transform: translateY(-1px);
}

/* Mobile Nav Toggle Button */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-main);
  border-radius: var(--radius-sm);
}
.mobile-nav-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
}

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 82%;
  max-width: 320px;
  height: 100vh;
  background: #ffffff;
  box-shadow: var(--shadow-xl);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}
.mobile-nav-drawer.open {
  right: 0;
}

.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-nav-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
.mobile-nav-item a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--text-main);
  background-color: var(--bg-surface-alt);
  transition: all var(--transition-fast);
}
.mobile-nav-item a:hover {
  background-color: #e0e7ff;
  color: var(--color-primary);
}

/* ==========================================================================
   Google AdSense Space Components (Responsive, Clean, Policy-Compliant)
   ========================================================================== */
.ad-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 2rem auto;
  width: 100%;
  text-align: center;
  position: relative;
}

.ad-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-light);
  margin-bottom: 0.4rem;
  font-weight: 600;
  display: block;
}

.ad-placeholder {
  background-color: #fafbfc;
  border: 1px dashed #e2e8f0;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0;
  width: 100%;
  box-sizing: border-box;
  transition: border-color var(--transition-fast);
  overflow: hidden;
}

.ad-placeholder:hover {
  border-color: #cbd5e1;
}

.ad-slot-leaderboard {
  max-width: 970px;
  min-height: 90px;
}
.ad-slot-in-article {
  max-width: 728px;
  min-height: 250px;
  margin: 2.5rem auto;
}
.ad-slot-sidebar {
  max-width: 300px;
  min-height: 250px;
  margin: 1.5rem 0;
}
.ad-slot-in-feed {
  max-width: 100%;
  min-height: 120px;
  margin: 1.5rem 0;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 4rem 0 3.5rem;
  background: radial-gradient(circle at 80% 20%, #e0e7ff 0%, #f8fafc 60%);
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: #dbeafe;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  border: 1px solid #bfdbfe;
}
.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #2563eb;
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-primary-dark);
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}
.hero-title .highlight {
  background: linear-gradient(120deg, #1e3a8a, #2563eb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-title .tax-free {
  color: var(--color-accent);
  -webkit-text-fill-color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.25rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  width: 100%;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.stat-item h4 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary-dark);
}
.stat-item p {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.3;
  margin-top: 0.2rem;
}

/* Hero Interactive Mini-Calculator Card */
.hero-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  padding: 1.75rem;
  position: relative;
}
.hero-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}
.hero-card-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-card-header .badge {
  font-size: 0.72rem;
  font-weight: 700;
  background: #ecfdf5;
  color: #059669;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
}

.calc-input-group {
  margin-bottom: 1.25rem;
}
.calc-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}
.calc-label span.value-display {
  color: var(--color-primary);
  font-weight: 700;
}
.calc-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.calc-currency-symbol {
  position: absolute;
  left: 0.85rem;
  font-weight: 700;
  color: var(--text-light);
}
.calc-input {
  width: 100%;
  padding: 0.65rem 0.85rem 0.65rem 2.2rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  outline: none;
  transition: border-color var(--transition-fast);
}
.calc-input:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.calc-preset-pills {
  display: flex;
  gap: 0.45rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}
.preset-btn {
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.preset-btn:hover {
  background: #e2e8f0;
  color: var(--color-primary-dark);
}

.calc-results {
  background: #f8fafc;
  border-radius: var(--radius-md);
  padding: 1rem;
  border: 1px solid var(--border-color);
  margin-top: 1rem;
}
.calc-result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0;
  font-size: 0.86rem;
}
.calc-result-row:not(:last-child) {
  border-bottom: 1px dashed #e2e8f0;
}
.calc-result-row.highlight {
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.95rem;
  padding-top: 0.65rem;
}

/* ==========================================================================
   Category Cards Hub
   ========================================================================== */
.section-padding {
  padding: 4.5rem 0;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-light);
  margin-bottom: 0.5rem;
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1.25;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.category-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  text-decoration: none;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}

.category-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
}
.cat-gst .category-icon-box { background-color: #eff6ff; color: #2563eb; }
.cat-income .category-icon-box { background-color: #ecfdf5; color: #059669; }
.cat-remittance .category-icon-box { background-color: #f5f3ff; color: #7c3aed; }
.cat-tools .category-icon-box { background-color: #fffbeb; color: #d97706; }

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}
.category-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}
.category-meta {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ==========================================================================
   Article Grid & Cards
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}

.article-thumb {
  position: relative;
  height: 190px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  color: #ffffff;
  overflow: hidden;
}
.article-thumb-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.12;
  background-image: radial-gradient(#ffffff 1px, transparent 1px);
  background-size: 16px 16px;
}
.thumb-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-primary-dark);
  backdrop-filter: blur(4px);
}
.thumb-icon {
  font-size: 2.8rem;
  z-index: 2;
}

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

.article-meta-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-light);
  margin-bottom: 0.75rem;
}
.article-meta-top .read-time {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.article-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}
.article-title a {
  color: inherit;
}
.article-title a:hover {
  color: var(--color-primary-light);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.author-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: #dbeafe;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}
.author-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
}
.read-more-link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary-light);
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

/* ==========================================================================
   Interactive Deduction Matrix / Cheat Sheet
   ========================================================================== */
.cheat-sheet-section {
  background-color: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.cheat-sheet-box {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}
.matrix-table th {
  background: #0f172a;
  color: #ffffff;
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.matrix-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}
.matrix-table tr:last-child td {
  border-bottom: none;
}
.matrix-table tr:hover {
  background-color: #f1f5f9;
}
.badge-allowed {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  background: #dcfce7;
  color: #15803d;
  font-weight: 700;
  font-size: 0.78rem;
  border-radius: var(--radius-full);
}
.badge-not-allowed {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  background: #fee2e2;
  color: #b91c1c;
  font-weight: 700;
  font-size: 0.78rem;
  border-radius: var(--radius-full);
}
.badge-partial {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  background: #fef3c7;
  color: #b45309;
  font-weight: 700;
  font-size: 0.78rem;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   Newsletter & Lead Magnet
   ========================================================================== */
.lead-magnet-card {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: center;
  box-shadow: var(--shadow-xl);
  margin: 3rem 0;
}
.lead-magnet-card h3 {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}
.lead-magnet-card p {
  color: #cbd5e1;
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.lead-perks {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.lead-perks li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: #e2e8f0;
}
.lead-perks svg {
  color: #10b981;
  flex-shrink: 0;
}
.lead-form {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}
.lead-form input[type="email"],
.lead-form input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: #ffffff;
  color: var(--text-main);
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
}
.lead-form .form-note {
  font-size: 0.75rem;
  color: #94a3b8;
  margin-top: 0.65rem;
  text-align: center;
}

/* ==========================================================================
   Article Detail Page Layout (SEO Optimized Reading Experience)
   ========================================================================== */
.article-header {
  padding: 3rem 0 2rem;
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
}
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-light);
  margin-bottom: 1.25rem;
}
.breadcrumbs a {
  color: var(--text-muted);
}
.breadcrumbs a:hover {
  color: var(--color-primary);
}
.breadcrumbs span.separator {
  color: #cbd5e1;
}

.article-main-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-primary-dark);
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-color);
  font-size: 0.88rem;
  color: var(--text-muted);
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.article-container-layout {
  display: grid;
  grid-template-columns: 260px 1fr 300px;
  gap: 2.5rem;
  padding: 3rem 0;
  align-items: start;
}
.article-container-layout.two-column {
  grid-template-columns: 1fr 320px;
}

/* Table of Contents Sticky Sidebar */
.toc-sidebar {
  position: sticky;
  top: 5.5rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
}
.toc-title {
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-dark);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.85rem;
}
.toc-list li a {
  color: var(--text-muted);
  display: block;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  line-height: 1.35;
  transition: all var(--transition-fast);
}
.toc-list li a:hover,
.toc-list li a.active {
  color: var(--color-primary);
  background-color: #eff6ff;
  font-weight: 600;
}

/* Article Prose Typography */
.prose {
  font-size: 1.06rem;
  line-height: 1.8;
  color: #1e293b;
}
.prose h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.prose h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 2rem 0 0.85rem;
  line-height: 1.35;
}
.prose p {
  margin-bottom: 1.35rem;
}
.prose ul, .prose ol {
  margin-bottom: 1.35rem;
  padding-left: 1.5rem;
}
.prose li {
  margin-bottom: 0.5rem;
}
.prose strong {
  color: var(--color-primary-dark);
  font-weight: 700;
}

/* Callout Boxes */
.callout {
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  border-left: 4px solid transparent;
}
.callout-title {
  font-weight: 700;
  font-size: 0.98rem;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.callout p:last-child {
  margin-bottom: 0;
}
.callout-tip {
  background-color: #ecfdf5;
  border-left-color: #059669;
  color: #064e3b;
}
.callout-tip .callout-title {
  color: #059669;
}
.callout-warning {
  background-color: #fffbeb;
  border-left-color: #d97706;
  color: #78350f;
}
.callout-warning .callout-title {
  color: #d97706;
}
.callout-notice {
  background-color: #eff6ff;
  border-left-color: #2563eb;
  color: #1e3a8a;
}
.callout-notice .callout-title {
  color: #2563eb;
}

/* Prose Tables */
.prose-table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 500px;
}
.prose th {
  background: #f1f5f9;
  color: var(--color-primary-dark);
  font-weight: 700;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}
.prose td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}
.prose tr:last-child td {
  border-bottom: none;
}

/* Share & Author Box */
.article-share-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin: 2.5rem 0;
}
.share-buttons {
  display: flex;
  gap: 0.5rem;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  border: none;
}
.share-x { background-color: #0f172a; }
.share-linkedin { background-color: #0a66c2; }
.share-whatsapp { background-color: #25d366; }

.author-box {
  display: flex;
  gap: 1.25rem;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 2.5rem 0;
}
.author-box-img {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #dbeafe;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  flex-shrink: 0;
}
.author-box-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}
.author-credentials {
  font-size: 0.82rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.author-box-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* FAQ Accordion */
.faq-accordion {
  margin: 2.5rem 0;
}
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
  background: #ffffff;
  overflow: hidden;
}
.faq-question {
  width: 100%;
  padding: 1.15rem 1.25rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background-color var(--transition-fast);
}
.faq-question:hover {
  background-color: #f8fafc;
}
.faq-icon {
  transition: transform var(--transition-fast);
  color: var(--text-light);
}
.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--color-primary);
}
.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem;
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.faq-item.active .faq-answer {
  display: block;
}

/* Article Sidebar Widget */
.sidebar-widget {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
}
.widget-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}
.related-posts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.related-post-item a {
  display: flex;
  flex-direction: column;
}
.related-post-item .post-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 0.25rem;
  transition: color var(--transition-fast);
}
.related-post-item a:hover .post-title {
  color: var(--color-primary);
}
.related-post-item .post-meta {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* ==========================================================================
   Full Dedicated Tax Calculator Styles
   ========================================================================== */
.calculator-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-lg);
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}
.calc-field-group {
  margin-bottom: 1.5rem;
}
.calc-field-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.4rem;
}
.calc-help-text {
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 0.35rem;
}
.regime-comparison-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}
.regime-card {
  background: #f8fafc;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
  position: relative;
  transition: all var(--transition-fast);
}
.regime-card.recommended {
  border-color: var(--color-accent);
  background: #f0fdf4;
}
.regime-card.recommended::before {
  content: 'RECOMMENDED';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: #ffffff;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}
.regime-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.regime-tax-amount {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}
.regime-diff {
  font-size: 0.78rem;
  font-weight: 600;
}

/* Advance Tax Calendar Matrix */
.advance-tax-calendar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}
.advance-tax-quarter {
  background: #f8fafc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  text-align: center;
}
.advance-tax-quarter .q-date {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}
.advance-tax-quarter .q-pct {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}
.advance-tax-quarter .q-amt {
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary-dark);
}

/* ==========================================================================
   Static Pages: Contact, About, Disclaimer, Privacy Policy
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  padding: 3rem 0;
}
.contact-form-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
}
.form-group {
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.4rem;
}
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}
.form-control:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}
textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
  margin: 3rem 0;
}
.about-feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}
.about-feature-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}

/* Legal & Disclaimer Banner */
.disclaimer-banner {
  background: #fffbeb;
  border: 1.5px solid #fde68a;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.disclaimer-banner svg {
  color: #d97706;
  flex-shrink: 0;
  margin-top: 0.2rem;
}
.disclaimer-banner p {
  font-size: 0.88rem;
  color: #92400e;
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 4.5rem 0 2rem;
  margin-top: auto;
  border-top: 1px solid #1e293b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand .brand-logo {
  color: #ffffff;
  margin-bottom: 1rem;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #94a3b8;
  margin-bottom: 1.5rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.92rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #ffffff;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.footer-links a {
  color: #94a3b8;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.82rem;
  color: #64748b;
}
.footer-disclaimer-note {
  font-size: 0.78rem;
  color: #64748b;
  line-height: 1.5;
  margin-top: 1rem;
  max-width: 800px;
}

/* Filter & Search Bar */
.search-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2.5rem;
  background: #ffffff;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.search-input-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.85rem;
  flex-grow: 1;
  max-width: 360px;
}
.search-input-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 0.9rem;
}
.category-filter-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.filter-pill {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--bg-surface-alt);
  color: var(--text-muted);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter-pill.active,
.filter-pill:hover {
  background: var(--color-primary);
  color: #ffffff;
}

/* ==========================================================================
   Responsive Breakpoints & Media Queries
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .article-container-layout {
    grid-template-columns: 1fr 300px;
  }
  .toc-sidebar {
    display: none; /* Collapsed or rendered inline on tablets/mobiles */
  }
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .lead-magnet-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .header-actions .btn-tax-guide {
    display: none;
  }
  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .hero-section {
    padding: 2.5rem 0;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .categories-grid {
    grid-template-columns: 1fr;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-container-layout,
  .article-container-layout.two-column {
    grid-template-columns: 1fr;
  }
  .calc-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .about-features {
    grid-template-columns: 1fr;
  }
  .advance-tax-calendar {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .ad-slot-leaderboard {
    min-height: 50px;
  }
  .lead-magnet-card {
    padding: 2rem 1.5rem;
  }
}