:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Menlo, Monaco, monospace;
  
  --bg-primary: #090D16;
  --bg-secondary: #0F172A;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(56, 189, 248, 0.35);

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  --accent-cyan: #38BDF8;
  --accent-blue: #0284C7;
  --accent-indigo: #818CF8;
  --accent-emerald: #10B981;
  --accent-glow: rgba(56, 189, 248, 0.15);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 36px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.2);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  color-scheme: dark light;
}

[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(241, 245, 249, 0.95);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-accent: rgba(2, 132, 199, 0.4);

  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #64748B;

  --accent-cyan: #0284C7;
  --accent-blue: #2563EB;
  --accent-indigo: #6366F1;
  --accent-emerald: #059669;
  --accent-glow: rgba(2, 132, 199, 0.1);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 16px 36px -10px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 30px rgba(2, 132, 199, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, var(--bg-secondary) 0%, var(--bg-primary) 75%);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(9, 13, 22, 0.78);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s ease;
}

[data-theme="light"] header.site-header {
  background: rgba(248, 250, 252, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  font-weight: 600;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

nav.main-nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav.main-nav a:hover {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.4);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-icon:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 56px;
}

.hero-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-headline {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-headline .gradient-text {
  background: linear-gradient(135deg, #38BDF8 20%, #818CF8 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subhead {
  font-size: 1.18rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item h3 {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
  letter-spacing: -0.03em;
}

.stat-item h3 span {
  color: var(--accent-cyan);
}

.stat-item p {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-top: 4px;
}

/* Hero Portrait Card */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.portrait-wrapper {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 4/5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
  background: var(--bg-secondary);
}

.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%;
  display: block;
}

.floating-badge {
  position: absolute;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid var(--border-accent);
  backdrop-filter: blur(12px);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  font-size: 0.85rem;
  font-weight: 600;
  animation: float 4s ease-in-out infinite;
}

.floating-badge.badge-top {
  top: 24px;
  left: -20px;
}

.floating-badge.badge-bottom {
  bottom: 24px;
  right: -20px;
  animation-delay: -2s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* Sections Common */
section {
  padding: 96px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.service-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 22px;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.service-bullets {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-bullets li {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-bullets li svg {
  color: var(--accent-emerald);
  flex-shrink: 0;
}

/* Interactive ROI FinOps Calculator */
.calculator-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.calc-group label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.calc-slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calc-slider-wrap input[type="range"] {
  width: 100%;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.calc-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.calc-option-btn {
  padding: 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}

.calc-option-btn.active, .calc-option-btn:hover {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  color: var(--text-primary);
}

.calc-results {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.calc-result-number {
  font-size: 2.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
  line-height: 1.1;
  margin: 12px 0 6px;
}

/* Case Studies Section */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 32px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 36px;
  display: flex;
  flex-direction: column;
  transition: all 0.3s;
}

.case-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

.case-tag {
  font-size: 0.74rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  font-weight: 700;
}

.case-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.case-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.case-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  border: 1px solid var(--border-subtle);
}

.metric-item strong {
  display: block;
  font-size: 1.4rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.metric-item span {
  font-size: 0.76rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.case-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stack-pill {
  font-size: 0.76rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

/* Skills Matrix */
.skills-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
}

.skill-category h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-badge {
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all 0.2s;
}

.skill-badge:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  background: rgba(56, 189, 248, 0.1);
}

/* Experience Timeline */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-cyan), var(--accent-indigo), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 48px;
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

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

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.timeline-bullets {
  list-style: none;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timeline-bullets li {
  position: relative;
  padding-left: 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.timeline-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

/* Education & Credentials */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 6px;
}

.edu-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.edu-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* Contact Section & Dialog Modal */
.contact-banner {
  background: radial-gradient(circle at 50% 50%, rgba(56, 189, 248, 0.15), transparent 70%), var(--bg-secondary);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 64px 32px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.contact-email-box {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  margin: 28px 0 36px;
}

.contact-email-text {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

dialog.modal-dialog {
  margin: auto;
  padding: 0;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  max-width: 540px;
  width: 90vw;
}

dialog.modal-dialog::backdrop {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
}

.modal-content {
  padding: 32px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--accent-cyan);
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0;
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* Print Styles for Executive CV export */
@media print {
  header.site-header, .hero-actions, .calc-box, .btn, .theme-toggle, .floating-badge, dialog {
    display: none !important;
  }
  body {
    background: #FFFFFF !important;
    color: #000000 !important;
  }
  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .service-card, .case-card, .timeline-content, .edu-card {
    border: 1px solid #CCCCCC !important;
    background: #FFFFFF !important;
    color: #000000 !important;
    box-shadow: none !important;
    break-inside: avoid;
  }
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  .hero-headline {
    font-size: 2.4rem;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .floating-badge {
    display: none;
  }
  .calculator-box {
    grid-template-columns: 1fr;
  }
  nav.main-nav {
    display: none;
  }
}