:root {
  /* Colors */
  --bg-base: #0a0b0d;
  --bg-surface: #111316;
  --bg-surface-elevated: #171a1e;
  --text-primary: #e6e8eb;
  --text-secondary: #8a8f98;
  --text-muted: #545963;
  --accent-green: #8ba882;
  --accent-amber: #e0a96d;
  --border-color: #202327;
  --border-hover: #40454e;
  
  /* Fonts */
  --font-sans: 'Geist', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Layout & Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Animations */
  --transition-fast: 0.1s ease;
  --transition-base: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- RESET & BASICS --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  background: var(--bg-base);
}

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

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

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

/* --- ACCESSIBILITY --- */
.skip-link {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--accent-green);
  color: var(--bg-base);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  transform: translateY(-150%);
  transition: transform var(--transition-fast);
  z-index: 200;
}

.skip-link:focus {
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 3px;
}

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

/* Monospace Labels & Details */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-green);
  text-transform: lowercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.mono-label.amber {
  color: var(--accent-amber);
}

/* --- COMMON COMPONENTS --- */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Buttons */
.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--accent-green);
}

.btn-primary {
  background: var(--accent-green);
  color: var(--bg-base);
  border-color: var(--accent-green);
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--bg-base);
  color: var(--accent-green);
  border-color: var(--accent-green);
}

.btn-secondary {
  background: transparent;
}

/* Status Indicator */
.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 6px;
  height: 6px;
  background-color: var(--accent-green);
  border-radius: 50%;
  display: inline-block;
  box-shadow: 0 0 8px var(--accent-green);
}

.status-dot.pulse {
  animation: pulse-dot 2.5s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.5; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.1); box-shadow: 0 0 12px var(--accent-green); }
}

/* Grid & Structure */
.section {
  padding: var(--space-20) 0;
  border-bottom: 1px solid var(--border-color);
}

.section-header-left {
  text-align: left;
  margin-bottom: var(--space-12);
}

.section-title-large {
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
  margin-top: var(--space-2);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
}

/* --- NAVIGATION --- */
nav {
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-base);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo span {
  color: var(--accent-green);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

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

/* --- HERO SECTION --- */
.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-12);
  align-items: center;
  min-height: calc(100vh - 64px - 100px);
  padding: var(--space-12) 0;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 580px;
}

.hero-keywords {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

/* Hero Diagram - Custom Blueprint Layout */
.hero-diagram {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: var(--space-6);
  border-radius: 4px;
  overflow-x: auto;
}

.diagram-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0;
  margin-bottom: var(--space-4);
}

.diagram-tabs {
  display: flex;
  gap: var(--space-1);
}

.diagram-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.diagram-tab:hover {
  color: var(--text-primary);
}

.diagram-tab.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

.diagram-body {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre;
}

.diagram-content {
  display: none;
}

.diagram-content.active {
  display: block;
}

.diagram-content .highlight-green {
  color: var(--accent-green);
}

.diagram-content .highlight-amber {
  color: var(--accent-amber);
}

/* --- PROOF SECTION --- */
.proof-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.proof-row {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  border-bottom: 1px dashed var(--border-color);
}

.proof-row:last-child {
  border-bottom: none;
}

.proof-problem {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.proof-remedy {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- CASE STUDIES --- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.case-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition-base);
}

.case-card:hover {
  border-color: var(--accent-green);
}

.case-card h3 {
  font-size: 1.2rem;
}

.case-detail {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.case-meta {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.case-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* --- SERVICES SECTION --- */
.services-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.service-card {
  border: 1px solid var(--border-color);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--transition-base);
}

.service-card:hover {
  border-color: var(--accent-green);
}

.service-card h3 {
  font-size: 1.15rem;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.service-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-2);
}

.service-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: var(--bg-surface-elevated);
  padding: 2px 6px;
  color: var(--text-secondary);
}

/* --- TIMELINE (EXPERIENCE) --- */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  position: relative;
  padding-left: var(--space-6);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -27px;
  top: 8px;
  width: 7px;
  height: 7px;
  background: var(--accent-green);
  border-radius: 50%;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.timeline-title {
  font-size: 1.2rem;
  font-weight: 600;
}

.timeline-company {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-green);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.timeline-bullets {
  list-style: none;
  padding-left: var(--space-4);
}

.timeline-bullets li {
  position: relative;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}

.timeline-bullets li::before {
  content: '→';
  position: absolute;
  left: -16px;
  color: var(--accent-green);
  font-family: var(--font-mono);
}

/* --- BLOG INDEX HOMEPAGE WIDGET --- */
.blog-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.blog-item-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition-base);
}

.blog-item-card:hover {
  border-color: var(--accent-green);
}

.blog-item-card h3 {
  font-size: 1.15rem;
}

.blog-item-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.blog-item-card .link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-green);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.blog-item-card:hover .link {
  color: var(--text-primary);
}

/* --- EDUCATION & CERTIFICATIONS --- */
.credentials-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.credential-card {
  border: 1px solid var(--border-color);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.credential-card h3 {
  font-size: 1.15rem;
}

.credential-card .org {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.credential-card .details {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.credential-card a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-green);
  margin-top: var(--space-2);
}

/* --- CONTACT SECTION --- */
.contact-container {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-10);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.contact-channel {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.contact-channel:hover {
  color: var(--accent-green);
}

/* Form Styles */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.form-label span.optional {
  color: var(--text-muted);
}

.form-input,
.form-select,
.form-textarea {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: var(--space-3);
  border-radius: 0;
  width: 100%;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-green);
  background: var(--bg-surface-elevated);
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238a8f98' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-8);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-honeypot {
  position: absolute;
  left: -9999px;
}

/* --- FOOTER --- */
footer {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--border-color);
  background: var(--bg-surface);
}

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

footer p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

footer .copyright-year {
  color: var(--accent-green);
}

/* --- RESPONSIVE ADJUSTMENTS --- */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: left;
  }

  .hero-diagram {
    width: 100%;
  }

  .contact-container {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .proof-row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) var(--space-6);
    flex-direction: column;
    gap: var(--space-3);
  }

  nav.is-open .nav-links {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }

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

  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
  }
}