/* ============================================================
   KRATANT JAIN — AUTOMATION PLATFORM ARCHITECT
   Portfolio CV — Style System
   ============================================================ */

/* 1. CSS Custom Properties
   ============================================================ */
:root {
  /* Background layers */
  --bg:           #090B0F;
  --bg-surface:   #0D1016;
  --bg-elevated:  #121620;
  --bg-accent-bg: #0A0D14;

  /* Borders */
  --border:        #1C2234;
  --border-subtle: #141826;

  /* Text */
  --text-primary:   #EAE6DC;
  --text-secondary: #7C8899;
  --text-muted:     #3D4858;

  /* Brand accent: warm amber/gold — distinctive, not clichéd */
  --accent:       #C9A261;
  --accent-light: #E5C280;
  --accent-dim:   rgba(201, 162, 97, 0.11);
  --accent-glow:  rgba(201, 162, 97, 0.05);

  /* Structural blue accent */
  --accent-blue: #4B7FC0;

  /* Typography */
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body:    'Outfit', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Spacing */
  --section-pad:    6.5rem;
  --container-max:  1120px;
  --container-pad:  2rem;
  --radius:         6px;
  --radius-lg:      10px;

  /* Transitions */
  --t-fast:   0.2s ease;
  --t-base:   0.3s ease;
  --t-slow:   0.65s ease;
}

/* 2. Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img        { max-width: 100%; display: block; }
a          { color: inherit; text-decoration: none; }
ul, ol     { list-style: none; }
button     { cursor: pointer; }

/* 3. Typography
   ============================================================ */
h1, h2, h3, h4, h5 {
  font-family: var(--font-body);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

/* Italic em — display font in amber */
em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}

/* 4. Layout Utilities
   ============================================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section {
  padding: var(--section-pad) 0;
}

.section-dark {
  background-color: var(--bg-surface);
}

/* Section label — monospace eyebrow text */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}

.section-label.light {
  color: var(--accent-light);
}

.section-heading {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  line-height: 1.2;
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-subtext {
  max-width: 520px;
  color: var(--text-secondary);
  margin-top: 1rem;
  font-size: 1rem;
  line-height: 1.75;
}

/* 5. Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  transition: all var(--t-base);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background-color: var(--accent);
  color: #0A0B0E;
  font-weight: 600;
}
.btn-primary:hover {
  background-color: var(--accent-light);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-sm  { padding: 0.45rem 1rem;  font-size: 0.82rem; }
.btn-lg  { padding: 0.85rem 1.9rem; font-size: 1rem; }

/* 6. Navigation
   ============================================================ */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--t-base), border-color var(--t-base);
}

.nav-header.scrolled {
  background: rgba(9, 11, 15, 0.93);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 1.15rem var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-style: italic;
  font-weight: 300;
  color: #090B0F;
  flex-shrink: 0;
}

.logo-name {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.86rem;
  color: var(--text-secondary);
  transition: color var(--t-fast);
  font-weight: 400;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--t-base);
  transform-origin: left;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after,
.nav-link:hover::after {
  transform: scaleX(1);
}

/* Nav actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  transition: all var(--t-base);
  border-radius: 1px;
}

/* 7. Hero Section
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 9rem 0 5rem;
}

/* Subtle grid overlay */
.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.016) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.016) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 85% 90% at 40% 50%, black 25%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 90% at 40% 50%, black 25%, transparent 100%);
  pointer-events: none;
}

/* Ambient glow spots */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}

.hero-glow-1 {
  top: 5%;
  left: -15%;
  width: 55%;
  height: 55%;
  background: radial-gradient(ellipse, rgba(201,162,97,0.055) 0%, transparent 65%);
}

.hero-glow-2 {
  bottom: 0;
  right: -10%;
  width: 45%;
  height: 55%;
  background: radial-gradient(ellipse, rgba(75,127,192,0.045) 0%, transparent 65%);
}

.hero-content {
  position: relative;
  z-index: 1;
}

/* Availability badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.9rem;
  background: rgba(201,162,97,0.08);
  border: 1px solid rgba(201,162,97,0.22);
  border-radius: 100px;
  font-size: 0.76rem;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 2.75rem;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  animation: badgePulse 2.5s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(201,162,97,0.35); }
  50%       { opacity: 0.7; box-shadow: 0 0 0 4px rgba(201,162,97,0); }
}

/* Hero name */
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(4.2rem, 10vw, 8rem);
  font-weight: 300;
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 1.75rem;
}

.hero-name em {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 200;
  color: var(--accent);
  display: block;
  letter-spacing: -0.02em;
}

/* Title line */
.hero-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.01em;
  margin-bottom: 1.75rem;
}

.title-sep {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Tagline */
.hero-tagline {
  max-width: 580px;
  font-size: 1.08rem;
  line-height: 1.78;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* CTA buttons */
.hero-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

/* Meta info row */
.hero-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.meta-sep { color: var(--border); }

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 30px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollDrop 2.2s ease-in-out infinite;
}

@keyframes scrollDrop {
  0%, 100% { opacity: 0.8; transform: scaleY(1) translateY(0); }
  50%       { opacity: 0.3; transform: scaleY(0.5) translateY(4px); }
}

/* 8. About Section
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 5rem;
  align-items: start;
}

.about-content .section-heading {
  margin-bottom: 2rem;
}

.about-text {
  color: var(--text-secondary);
  font-size: 1.03rem;
  line-height: 1.82;
  margin-bottom: 1.25rem;
}

.about-quote {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border-left: 2px solid var(--accent);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-style: italic;
  font-weight: 300;
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--accent-glow);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Profile photo */
.profile-photo-wrap {
  margin-bottom: 1.5rem;
  position: relative;
}

.profile-photo-wrap::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius-lg) + 1px);
  background: linear-gradient(145deg, rgba(201,162,97,0.4), rgba(75,127,192,0.15), transparent 70%);
  z-index: -1;
}

.profile-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  display: block;
}

/* Quick facts */
.about-quick-facts {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.quick-fact {
  padding: 0.85rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
}

.fact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.fact-value {
  font-size: 0.86rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.45;
}

/* 9. Capabilities Grid
   ============================================================ */

/* Grid trick: gap shows through as thin border lines */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.cap-card {
  padding: 1.75rem;
  background: var(--bg-elevated);
  transition: background var(--t-base);
  position: relative;
}

.cap-card:hover {
  background: linear-gradient(135deg, var(--bg-elevated) 0%, #0F1520 100%);
}

.cap-card:hover .cap-title {
  color: var(--accent-light);
}

.cap-icon {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.cap-title {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  line-height: 1.35;
  transition: color var(--t-base);
}

.cap-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.68;
}

/* 10. Impact Stats
   ============================================================ */
.impact-section {
  background: var(--bg-accent-bg);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 1rem;
}

.impact-stat {
  padding: 2.75rem 2rem;
  text-align: center;
  border-right: 1px solid var(--border);
  background: var(--bg-elevated);
  position: relative;
}

.impact-stat:last-child { border-right: none; }

/* Top accent line */
.impact-stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent), transparent);
}

.stat-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.1rem;
  margin-bottom: 0.6rem;
  line-height: 1;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3.8rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  font-style: normal;
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.84rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.45;
  margin-bottom: 0.4rem;
}

.stat-context {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* 11. Experience / Timeline
   ============================================================ */
.timeline {
  position: relative;
}

.timeline-item {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 0.45rem;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--bg);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.timeline-dot.current {
  background: var(--accent);
  border-color: var(--bg);
  box-shadow: 0 0 0 4px var(--accent-dim), 0 0 12px rgba(201,162,97,0.25);
}

.timeline-line {
  width: 1px;
  flex: 1;
  background: var(--border);
  margin-top: 4px;
  min-height: 2rem;
}

/* Timeline card */
.timeline-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  transition: border-color var(--t-base);
}

.timeline-card:hover { border-color: var(--border); }

.timeline-card.current-role {
  border-color: rgba(201,162,97,0.18);
  background: var(--bg-surface);
}

.timeline-card.current-role:hover {
  border-color: rgba(201,162,97,0.32);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.7rem;
}

.card-period {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.card-badge {
  padding: 0.18rem 0.55rem;
  background: var(--accent-dim);
  border: 1px solid rgba(201,162,97,0.28);
  border-radius: 100px;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--accent);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-role {
  font-size: 1.12rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.card-company {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.card-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 1.25rem;
}

.card-achievements {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.card-achievements li {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.62;
  padding-left: 1.1rem;
  position: relative;
}

.card-achievements li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.72rem;
  top: 0.06em;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border-subtle);
}

/* 12. Tags
   ============================================================ */
.tag {
  display: inline-block;
  padding: 0.24rem 0.6rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-secondary);
  white-space: nowrap;
  line-height: 1.4;
}

.tag-primary {
  background: var(--accent-dim);
  border-color: rgba(201,162,97,0.22);
  color: var(--accent);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* 13. Architecture Lens
   ============================================================ */
.section-accent {
  background: linear-gradient(160deg, #0A0F1C 0%, #090B0F 55%, #0B0D14 100%);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.section-accent::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 55%;
  height: 120%;
  background: radial-gradient(ellipse, rgba(201,162,97,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.arch-content {
  max-width: 820px;
  position: relative;
  z-index: 1;
}

.arch-heading {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  font-weight: 300;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 3.5rem;
  line-height: 1.18;
}

.arch-principles {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.arch-principle {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  gap: 1.5rem;
  align-items: start;
}

.principle-marker {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--accent);
  padding-top: 0.1rem;
  line-height: 1;
}

.arch-principle h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.arch-principle p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.78;
}

/* 14. Tech Stack
   ============================================================ */
.stack-groups {
  display: flex;
  flex-direction: column;
}

.stack-group {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.stack-group:first-child { padding-top: 0; }
.stack-group:last-child  { border-bottom: none; padding-bottom: 0; }

.group-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 0.25rem;
}

/* 15. Future Direction Cards
   ============================================================ */
.direction-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.direction-card {
  padding: 1.9rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--t-base), transform var(--t-base);
}

.direction-card:hover {
  border-color: rgba(201,162,97,0.28);
  transform: translateY(-2px);
}

.dir-icon {
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}

.direction-card h4 {
  font-size: 0.97rem;
  font-weight: 600;
  margin-bottom: 0.7rem;
  color: var(--text-primary);
  line-height: 1.35;
}

.direction-card p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.72;
}

/* 16. Education
   ============================================================ */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.edu-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.4rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-top: 1.5rem;
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 0.15rem;
}

.edu-degree {
  font-size: 0.97rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.edu-institution {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.cert-categories {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.cert-cat {
  padding: 1.1rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
}

.cert-cat-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.7rem;
}

/* 17. Contact
   ============================================================ */
.contact-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
}

.contact-content {
  max-width: 600px;
}

.contact-heading {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  line-height: 1.2;
  margin: 0.75rem 0 1.25rem;
}

.contact-text {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.78;
  margin-bottom: 2.5rem;
}

.contact-actions {
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.84rem;
  color: var(--text-muted);
  transition: color var(--t-base);
}

.contact-link:hover { color: var(--text-secondary); }

/* 18. Footer
   ============================================================ */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border-subtle);
  padding: 1.6rem 0;
}

.footer-content {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-name {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
  flex-shrink: 0;
}

.footer-role {
  font-size: 0.8rem;
  color: var(--text-muted);
  flex: 1;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* 19. Reveal Animations
   ============================================================ */
.reveal-item {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--t-slow), transform var(--t-slow);
}

.reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays — capabilities */
.capabilities-grid .reveal-item:nth-child(1) { transition-delay: 0.04s; }
.capabilities-grid .reveal-item:nth-child(2) { transition-delay: 0.09s; }
.capabilities-grid .reveal-item:nth-child(3) { transition-delay: 0.14s; }
.capabilities-grid .reveal-item:nth-child(4) { transition-delay: 0.19s; }
.capabilities-grid .reveal-item:nth-child(5) { transition-delay: 0.24s; }
.capabilities-grid .reveal-item:nth-child(6) { transition-delay: 0.29s; }
.capabilities-grid .reveal-item:nth-child(7) { transition-delay: 0.34s; }
.capabilities-grid .reveal-item:nth-child(8) { transition-delay: 0.39s; }

/* Stagger delays — impact */
.impact-grid .reveal-item:nth-child(1) { transition-delay: 0.05s; }
.impact-grid .reveal-item:nth-child(2) { transition-delay: 0.12s; }
.impact-grid .reveal-item:nth-child(3) { transition-delay: 0.19s; }
.impact-grid .reveal-item:nth-child(4) { transition-delay: 0.26s; }

/* Stagger delays — direction cards */
.direction-grid .reveal-item:nth-child(1) { transition-delay: 0.05s; }
.direction-grid .reveal-item:nth-child(2) { transition-delay: 0.12s; }
.direction-grid .reveal-item:nth-child(3) { transition-delay: 0.19s; }
.direction-grid .reveal-item:nth-child(4) { transition-delay: 0.26s; }

/* Stagger delays — hero (fires on page load since in-viewport) */
.hero-content .reveal-item:nth-child(1) { transition-delay: 0.1s; }
.hero-content .reveal-item:nth-child(2) { transition-delay: 0.3s; }
.hero-content .reveal-item:nth-child(3) { transition-delay: 0.48s; }
.hero-content .reveal-item:nth-child(4) { transition-delay: 0.62s; }
.hero-content .reveal-item:nth-child(5) { transition-delay: 0.76s; }
.hero-content .reveal-item:nth-child(6) { transition-delay: 0.9s; }

/* 20. Scrollbar
   ============================================================ */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* 21. Selection
   ============================================================ */
::selection {
  background: var(--accent-dim);
  color: var(--accent-light);
}

/* 22. Focus (accessibility)
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Large tablets and small desktops */
@media (max-width: 1024px) {
  :root { --section-pad: 5rem; }

  .capabilities-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .about-sidebar {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    align-items: start;
  }

  .profile-photo {
    aspect-ratio: 1;
    max-width: 220px;
  }
}

/* Tablets */
@media (max-width: 768px) {
  :root {
    --section-pad:   4rem;
    --container-pad: 1.25rem;
  }

  /* Mobile nav */
  .nav-links {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(9, 11, 15, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 1.5rem var(--container-pad);
    gap: 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    z-index: 99;
  }

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

  .nav-toggle {
    display: flex;
  }

  /* Hero */
  .hero-name {
    font-size: clamp(3.8rem, 16vw, 5.5rem);
  }

  .hero-title {
    flex-direction: column;
    gap: 0.2rem;
    align-items: flex-start;
  }

  .title-sep { display: none; }

  .hero-scroll { display: none; }

  /* Capabilities */
  .capabilities-grid {
    grid-template-columns: 1fr;
    border-radius: var(--radius-lg);
  }

  /* Impact */
  .impact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .impact-stat {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .impact-stat:nth-child(odd)  { border-right: 1px solid var(--border); }
  .impact-stat:nth-child(3),
  .impact-stat:nth-child(4)    { border-bottom: none; }

  /* Timeline */
  .timeline-item {
    grid-template-columns: 14px 1fr;
    gap: 1rem;
  }

  .timeline-card { padding: 1.25rem 1.4rem; }

  /* Stack */
  .stack-group { grid-template-columns: 1fr; gap: 0.7rem; }

  /* Direction */
  .direction-grid { grid-template-columns: 1fr; }

  /* Education */
  .edu-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  /* About sidebar */
  .about-sidebar {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact-actions { flex-direction: column; }
}

/* Mobile phones */
@media (max-width: 480px) {
  .hero-name {
    font-size: 3.4rem;
    letter-spacing: -0.03em;
  }

  .hero-badge {
    font-size: 0.68rem;
    padding: 0.35rem 0.75rem;
  }

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

  .impact-stat {
    border-right: none !important;
    border-bottom: 1px solid var(--border);
  }

  .impact-stat:last-child { border-bottom: none; }

  .stat-number { font-size: 3.2rem; }
  .stat-suffix { font-size: 1.9rem; }

  .section-heading {
    font-size: 1.65rem;
  }

  .arch-heading {
    font-size: 1.9rem;
  }

  .timeline-card { padding: 1.1rem; }
}