/* ==========================================
   AI SEO Course - Swiss International Style
   Single Minimized CSS for TTFB < 100ms
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Pixelify+Sans:wght@400..700&family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --bg-primary: #fcfcf9;
  --bg-secondary: #ffffff;
  --bg-dark: #0f1115;
  --bg-subdued: #f3f4f1;
  --text-main: #111318;
  --text-muted: #525866;
  --text-light: #ffffff;
  --border-color: #e2e4df;
  --border-dark: #2a2e37;
  --accent-black: #000000;
  --accent-green: #10b981;
  --accent-green-bg: #ecfdf5;
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-pixel: 'Pixelify Sans', cursive, var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;
  --container-max: 1140px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
  max-width: 100vw;
}

/* Header Pixel Banner (Ryze Style) */
.pixel-banner-wrap {
  width: 100%;
  height: 110px;
  overflow: hidden;
  background-color: #1a2e1a;
  position: relative;
  border-bottom: 2px solid var(--accent-black);
}

.pixel-banner-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  opacity: 0.95;
}

.pixel-banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.1) 50%, rgba(0,0,0,0.5) 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pixel-badge {
  background: #000000;
  color: #22c55e;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid #22c55e;
  box-shadow: 2px 2px 0px #000000;
}

/* Pixel Art Decorative Band / Section Divider */
.pixel-divider-band {
  width: 100%;
  height: 140px;
  margin: 4rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  border: 2px solid var(--accent-black);
  box-shadow: 4px 4px 0px var(--accent-black);
}

.pixel-divider-band img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.pixel-divider-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  color: #ffffff;
  font-family: var(--font-mono);
}

/* Split Layout with Pixel Art Side Graphic (Ryze Audit Box Style) */
.pixel-split-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  background: var(--bg-secondary);
  border: 2px solid var(--accent-black);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 6px 6px 0px rgba(0,0,0,0.1);
  margin: 3.5rem 0;
}

.pixel-split-graphic {
  position: relative;
  min-height: 280px;
  background: #1e3a29;
}

.pixel-split-graphic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.pixel-split-content {
  padding: 2.5rem;
}

/* Pixel Frame Card Header */
.pixel-card-header {
  height: 120px;
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--accent-black);
}

.pixel-card-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
}

/* Header & Navigation */
header.site-header {
  background: rgba(252, 252, 249, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo-img {
  height: 32px;
  width: auto;
  display: block;
  object-fit: contain;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  flex-wrap: nowrap;
}

nav.main-nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.88rem;
  white-space: nowrap;
  transition: color 0.15s ease;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--accent-black);
}

/* Specificity fix for CTA Button: Force readable pure white text on black */
nav.main-nav a.btn-cta,
.btn-cta {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 0.55rem 1.15rem !important;
  background: #000000 !important;
  color: #ffffff !important;
  font-family: 'Pixelify Sans', cursive !important;
  font-weight: 700 !important;
  font-size: 0.92rem !important;
  text-decoration: none !important;
  border-radius: var(--radius-sm) !important;
  border: 1px solid #000000 !important;
  box-shadow: 2px 2px 0px rgba(0,0,0,0.2) !important;
  transition: all 0.15s ease !important;
  letter-spacing: 0.02em !important;
  white-space: nowrap !important;
}

nav.main-nav a.btn-cta:hover,
.btn-cta:hover {
  background: #252830 !important;
  color: #ffffff !important;
  transform: translateY(-1px) !important;
  box-shadow: 3px 3px 0px #000000 !important;
}

/* Layout Containers */
main {
  flex: 1;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-hero {
  padding: 4rem 0 3rem 0;
}

/* Typography Scale - Retro Pixel Vibe */
h1, h2, h3, h4, h5, h6, h1.hero-title, .site-logo, summary.module-summary, .footer-brand h4, .footer-links-col h5 {
  font-family: 'Pixelify Sans', cursive, var(--font-sans) !important;
}

h1, h1.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--accent-black);
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent-black);
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-black);
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

/* AI Overview Snippet Box (GEO Optimization Block) */
.ai-overview-snippet {
  background: #ffffff;
  border: 2px solid var(--accent-black);
  border-left: 6px solid var(--accent-black);
  border-radius: var(--radius-md);
  padding: 1.75rem 2rem;
  margin: 2rem 0 3rem 0;
  box-shadow: 4px 4px 0px rgba(0, 0, 0, 0.08);
}

.ai-overview-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--accent-green-bg);
  color: #065f46;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  border: 1px solid #a7f3d0;
}

.ai-overview-snippet p.snippet-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Grid & Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin: 2.5rem 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin: 2.5rem 0;
}

.card {
  background: var(--bg-secondary);
  border: 2px solid var(--accent-black);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 4px 4px 0px var(--accent-black);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--accent-black);
  transform: translateY(-3px);
  box-shadow: 7px 7px 0px var(--accent-black);
}

.card-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--accent-green-bg);
  color: #065f46;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  border: 1px solid #a7f3d0;
  margin-bottom: 0.75rem;
  width: fit-content;
}

/* Evidence Classification System */
.evidence-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  width: fit-content;
}

.evidence-tag.observed {
  background: #dcfce7;
  color: #15803d;
  border: 1px solid #86efac;
}

.evidence-tag.documented {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #93c5fd;
}

.evidence-tag.hypothesized {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

/* Blog Section Styling */
.blog-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
}

.blog-card:hover {
  border-color: var(--accent-black);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.blog-card-header {
  height: 180px;
  overflow: hidden;
  position: relative;
  background: #fafaf7;
}

.blog-card-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  display: block;
}

.blog-card-header::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: 0; right: 0;
  background: linear-gradient(to bottom, rgba(250, 250, 247, 0) 0%, rgba(250, 250, 247, 0.3) 50%, #fafaf7 100%);
  pointer-events: none;
}

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

.blog-meta-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* Mastermind Recommendation Box */
.mastermind-section {
  background: var(--bg-dark);
  color: var(--text-light);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  margin: 4rem 0;
  border: 1px solid var(--border-dark);
}

.mastermind-section h2 {
  color: #ffffff;
  margin-bottom: 1rem;
}

.mastermind-section p {
  color: #a0a6b5;
  font-size: 1.1rem;
  line-height: 1.7;
}

/* Tables (Swiss Clean Comparison) */
.comparison-table-wrap {
  overflow-x: auto;
  margin: 2.5rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
}

table.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

table.comparison-table th {
  background: var(--accent-black);
  color: #ffffff;
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

table.comparison-table td {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
  vertical-align: top;
}

table.comparison-table tr:last-child td {
  border-bottom: none;
}

table.comparison-table tr:nth-child(even) {
  background-color: rgba(0,0,0,0.015);
}

/* Syllabus Details / Accordions */
.module-accordion {
  margin: 1.5rem 0;
}

details.module-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

details.module-item[open] {
  border-color: var(--accent-black);
}

summary.module-summary {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-pixel);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-black);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

summary.module-summary::-webkit-details-marker {
  display: none;
}

summary.module-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-muted);
}

details[open] summary.module-summary::after {
  content: "−";
}

.module-content {
  padding: 0 1.5rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border-color);
  background: #fafaf7;
  overflow: hidden;
  position: relative;
}

.module-content ul {
  padding-left: 1.25rem;
  margin-top: 1rem;
}

.module-content li {
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

/* Course Metadata Strip */
.course-meta-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  background: var(--bg-secondary);
  border: 2px solid var(--accent-black);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  box-shadow: 4px 4px 0px var(--accent-black);
}

.course-meta-item {
  display: flex;
  flex-direction: column;
}

.course-meta-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.course-meta-value {
  font-family: 'Pixelify Sans', cursive, var(--font-sans);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-black);
}

/* Course Exercise & Outcome Callouts (Swiss Retro Style) */
.exercise-box {
  background: #ffffff;
  border: 2px solid var(--accent-black);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  box-shadow: 3px 3px 0px var(--accent-black);
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.6;
}

.exercise-box strong {
  display: inline-flex;
  align-items: center;
  background: #000000;
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 4px;
  border-left: 3px solid #3b82f6;
  margin-right: 0.55rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.outcome-box {
  background: #ffffff;
  border: 2px solid var(--accent-black);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  box-shadow: 3px 3px 0px var(--accent-black);
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.6;
}

.outcome-box strong {
  display: inline-flex;
  align-items: center;
  background: #000000;
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 4px;
  border-left: 3px solid #10b981;
  margin-right: 0.55rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Curriculum Module Layout: Native Parent Container Background Image (Un-distorted Aspect Ratio + Clean Color Fade Overlay) */
.module-content-bg-left {
  position: relative;
  background-color: #fafaf7;
  overflow: hidden;
  padding: 0 !important;
}

.module-content-bg-left::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 380px;
  background-image: 
    linear-gradient(to right, rgba(250, 250, 247, 0) 0%, rgba(250, 250, 247, 0.25) 45%, rgba(250, 250, 247, 0.85) 80%, #fafaf7 100%),
    var(--bg-img);
  background-size: cover;
  background-position: left center;
  background-repeat: no-repeat;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  z-index: 1;
  pointer-events: none;
}

.module-content-bg-right {
  position: relative;
  background-color: #fafaf7;
  overflow: hidden;
  padding: 0 !important;
}

.module-content-bg-right::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  width: 380px;
  background-image: 
    linear-gradient(to left, rgba(250, 250, 247, 0) 0%, rgba(250, 250, 247, 0.25) 45%, rgba(250, 250, 247, 0.85) 80%, #fafaf7 100%),
    var(--bg-img);
  background-size: cover;
  background-position: right center;
  background-repeat: no-repeat;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  z-index: 1;
  pointer-events: none;
}

.module-text-grid-left {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 1.5rem;
  align-items: start;
  position: relative;
  z-index: 2;
  padding: 1.5rem 1.5rem 1.5rem 0;
}

.module-text-grid-right {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 1.5rem;
  align-items: start;
  position: relative;
  z-index: 2;
  padding: 1.5rem 0 1.5rem 1.5rem;
}

.module-img-spacer {
  height: 100%;
  min-height: 1px;
}

/* Contact & Feature Split Cards: Image Extends Under Form with Crisp Contact Overlay */
.pixel-split-card {
  display: grid;
  grid-template-columns: 340px 1fr;
  background: #fafaf7;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  position: relative;
}

.pixel-split-graphic {
  position: relative;
  height: 100%;
  min-height: 420px;
  overflow: visible;
  z-index: 1;
}

.pixel-split-graphic img {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 520px;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  display: block;
}

.pixel-split-graphic::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 520px;
  background: linear-gradient(to right, rgba(250, 250, 247, 0) 0%, rgba(250, 250, 247, 0.12) 28%, rgba(250, 250, 247, 0.65) 62%, rgba(250, 250, 247, 0.95) 88%, #fafaf7 100%);
  pointer-events: none;
  z-index: 2;
}

.pixel-split-content {
  padding: 2.5rem 2.5rem 2.5rem 2rem;
  position: relative;
  z-index: 3;
}

.pixel-card-header {
  height: 170px;
  overflow: hidden;
  position: relative;
  background: #fafaf7;
}

.pixel-card-header img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: pixelated;
  display: block;
}

.pixel-card-header::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to bottom, rgba(250, 250, 247, 0) 0%, rgba(250, 250, 247, 0.3) 50%, #fafaf7 100%);
  pointer-events: none;
}

/* Instructor Bio Styling */
.instructor-profile {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: start;
  margin: 2.5rem 0;
}

.instructor-img-wrap {
  border: none;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #fafaf7;
  position: relative;
}

.instructor-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.15);
  transform-origin: center;
  image-rendering: pixelated;
  display: block;
}

.instructor-img-wrap::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to bottom, rgba(250, 250, 247, 0) 40%, rgba(250, 250, 247, 0.8) 80%, #fafaf7 100%);
  pointer-events: none;
}

.instructor-bio h2 {
  margin-bottom: 0.5rem;
}

.instructor-subtitle {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

ul.experience-list {
  list-style: none;
  margin: 1.5rem 0;
}

ul.experience-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.85rem;
  color: var(--text-main);
  font-weight: 500;
}

ul.experience-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent-black);
  font-weight: 800;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.link-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.15rem;
  border: 2px solid var(--accent-black);
  background: var(--bg-secondary);
  color: var(--accent-black);
  text-decoration: none;
  font-family: 'Pixelify Sans', cursive, var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
  box-shadow: 3px 3px 0px var(--accent-black);
}

.link-button:hover {
  border-color: var(--accent-black);
  background: var(--accent-black);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 5px 5px 0px #000000;
}

/* Forms (Contact Page) */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-black);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text-main);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-black);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.1);
}

textarea.form-control {
  min-height: 140px;
  resize: vertical;
}

/* Footer & Entire Footer Pixel Art Background */
.footer-pixel-strip {
  display: none; /* Replaced by full pixel art footer background */
}

footer.site-footer {
  position: relative;
  background-image: url('/assets/aeo-geo-course-nature-landscape.webp');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  color: #ffffff;
  border-top: 3px solid var(--accent-black);
  padding: 4.5rem 0 2rem 0;
  margin-top: auto;
  overflow: hidden;
}

footer.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(8, 10, 14, 0.72) 0%, rgba(8, 10, 14, 0.88) 100%);
  z-index: 1;
}

.footer-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  position: relative;
  z-index: 2;
}

.footer-brand h4 {
  font-family: 'Plus Jakarta Sans', sans-serif !important;
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 0.75rem;
  text-shadow: 0 2px 6px rgba(0,0,0,0.8);
}

.footer-brand p {
  color: #e2e8f0;
  font-size: 1rem;
  line-height: 1.65;
}

.footer-brand h4 a {
  color: #ffffff !important;
  text-decoration: none;
}

.footer-brand h4 a:hover {
  color: #22c55e !important;
}

.footer-brand p a {
  color: #ffffff !important;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: #22c55e;
  text-underline-offset: 3px;
}

.footer-brand p a:hover {
  color: #22c55e !important;
}

.footer-links-col h5 {
  font-family: 'Plus Jakarta Sans', sans-serif !important;
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #22c55e;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.9);
}

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

.footer-links-col li {
  margin-bottom: 0.65rem;
}

.footer-links-col a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.footer-links-col a:hover {
  color: #ffffff;
  text-shadow: 0 0 8px rgba(255,255,255,0.6);
}

.footer-bottom {
  max-width: var(--container-max);
  margin: 3.5rem auto 0 auto;
  padding: 1.5rem 1.5rem 0 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-pixel);
  font-size: 0.95rem;
  color: #94a3b8;
  position: relative;
  z-index: 2;
}

/* Responsive Grid & Layout Helper Classes */
.hero-split-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 3rem;
  align-items: center;
}

.section-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 2rem;
  gap: 1.5rem;
}

/* ==========================================
   Responsive Breakpoints & Mobile Fixes
   ========================================== */
@media (max-width: 992px) {
  .hero-split-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 1120px) and (min-width: 861px) {
  nav.main-nav {
    gap: 0.85rem;
  }
  nav.main-nav a {
    font-size: 0.82rem;
  }
  nav.main-nav a.btn-cta {
    padding: 0.45rem 0.95rem !important;
    font-size: 0.88rem !important;
  }
}

@media (max-width: 860px) {
  .header-container {
    padding: 1rem 1.25rem;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  .site-logo {
    font-size: 1.25rem;
  }
  nav.main-nav {
    gap: 0.75rem 1.25rem;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
  }
  nav.main-nav a {
    font-size: 0.9rem;
  }
  nav.main-nav a.btn-cta,
  .btn-cta {
    padding: 0.5rem 1.1rem !important;
    font-size: 0.95rem !important;
  }
  .grid-3 { grid-template-columns: 1fr; gap: 1.5rem; }
  .grid-2 { grid-template-columns: 1fr; gap: 1.5rem; }
  .instructor-profile { grid-template-columns: 1fr; gap: 2rem; }
  .pixel-split-card { grid-template-columns: 1fr; }
  .course-meta-strip { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .module-text-grid-left,
  .module-text-grid-right {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
    padding: 1.25rem !important;
  }
  .module-img-spacer {
    display: none !important;
  }
  .module-content-bg-left::before,
  .module-content-bg-right::before {
    display: none !important;
  }
  .footer-container { grid-template-columns: 1fr; gap: 2rem; }
  .section-header-flex { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

@media (max-width: 640px) {
  h1, h1.hero-title { font-size: 2.1rem; line-height: 1.15; }
  h2 { font-size: 1.65rem; }
  p, p.lead { font-size: 1rem !important; }
  .container { padding: 2rem 1rem; }
  .section-hero { padding: 2rem 0 1.5rem 0; }
  .pixel-banner-wrap { height: auto; min-height: 85px; }
  .pixel-banner-overlay {
    padding: 0.65rem 1rem;
    flex-direction: column;
    justify-content: center;
    gap: 0.4rem;
    text-align: center;
    font-size: 0.75rem;
  }
  .pixel-divider-band {
    height: auto !important;
    min-height: 95px;
    margin: 2rem 0 !important;
  }
  .pixel-divider-overlay {
    padding: 0.65rem 1rem;
    flex-direction: column;
    justify-content: center;
    gap: 0.4rem;
    text-align: center;
    font-size: 0.75rem;
  }
  .pixel-badge { padding: 2px 6px; font-size: 0.7rem; }
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; margin-top: 2rem; }
  .pixel-split-content { padding: 1.5rem 1.25rem; }
  .ai-overview-snippet { padding: 1.25rem 1.25rem; margin: 1.5rem 0 2rem 0; }
}

/* ==========================================
   Certificates Slider Component
   ========================================== */
.cert-slider-section {
  margin: 3.5rem 0;
  padding: 3rem 0;
  background: var(--bg-secondary, #ffffff);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: var(--radius-lg, 14px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.cert-slider-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
}

.cert-slider-wrapper {
  position: relative;
  width: 100%;
  padding: 0 1.5rem;
}

.cert-slider-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 1.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-black, #000000) transparent;
}

.cert-slider-track::-webkit-scrollbar {
  height: 6px;
}
.cert-slider-track::-webkit-scrollbar-thumb {
  background: var(--accent-black, #000000);
  border-radius: 4px;
}

.cert-slide-card {
  flex: 0 0 310px;
  scroll-snap-align: start;
  background: #ffffff;
  border: 1.5px solid var(--border-color, #e5e7eb);
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.cert-slide-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-black, #111827);
}

.cert-slide-img-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #111827;
  position: relative;
}

.cert-slide-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cert-slide-body {
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.cert-slider-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.cert-slider-btn {
  background: var(--accent-black, #111827);
  color: #ffffff;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.25rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.1s ease;
}

.cert-slider-btn:hover {
  background: #374151;
  transform: scale(1.05);
}