/* ==========================================================================
   Sai Gopal Rathod — Portfolio
   "Neural Dark" design system
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Surfaces */
  --bg-0: #0a0b0f;
  --bg-1: #0f1117;
  --bg-2: #161922;
  --surface-glass: rgba(20, 23, 32, 0.6);
  --surface-glass-strong: rgba(22, 25, 34, 0.82);

  /* Accent */
  --accent: #22e3d6;
  --accent-2: #5b8cff;
  --accent-soft: rgba(34, 227, 214, 0.12);
  --accent-ink: #04201e;

  /* Text */
  --text-0: #f2f5f7;
  --text-1: #aeb6c2;
  --text-2: #727a88;

  /* Lines */
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);

  /* Type */
  --font-display: "Bricolage Grotesque", system-ui, sans-serif;
  --font-body: "Sora", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --fs-display: clamp(2.6rem, 6vw, 5rem);
  --fs-h2: clamp(1.9rem, 4vw, 2.9rem);
  --fs-h3: 1.4rem;
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;

  /* Spacing */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6.5rem;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  /* Shadows / glows */
  --shadow-card: 0 18px 50px -22px rgba(0, 0, 0, 0.75);
  --glow-accent: 0 0 0 1px rgba(34, 227, 214, 0.25), 0 0 32px -6px rgba(34, 227, 214, 0.4);
  --glow-soft: 0 0 60px -18px rgba(91, 140, 255, 0.5);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.18s;
  --dur: 0.45s;
  --dur-slow: 0.8s;

  --maxw: 1180px;
  --nav-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text-1);
  background-color: var(--bg-0);
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Global dot-grid atmosphere */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 35%, transparent 80%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 35%, transparent 80%);
  opacity: 0.6;
  pointer-events: none;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--text-0);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}

::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 1000;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
}
.skip-link:focus {
  left: 0;
}

/* --------------------------------------------------------------------------
   Section rhythm & headings
   -------------------------------------------------------------------------- */
section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.about,
.skills,
.education {
  background: var(--bg-1);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  margin-bottom: var(--space-2xl);
  max-width: 720px;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.section-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.section-title {
  font-size: var(--fs-h2);
  color: var(--text-0);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur) var(--ease-out), background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 0 0 0 rgba(34, 227, 214, 0);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-accent);
}

.btn-secondary {
  background: transparent;
  color: var(--text-0);
  border-color: var(--line-strong);
}
.btn-secondary:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   Navbar
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: rgba(10, 11, 15, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .navbar {
    background: var(--bg-1);
  }
}

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

.nav-brand a {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-0);
}
.nav-monogram {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  box-shadow: var(--glow-accent);
}
.nav-name {
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.85rem;
  font-size: 0.92rem;
  color: var(--text-1);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.35rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.nav-link:hover,
.nav-link.active {
  color: var(--text-0);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-0);
  border-radius: 2px;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast);
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + var(--space-xl));
  padding-bottom: var(--space-2xl);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-bg .glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}
.hero-bg .glow-1 {
  width: 46vw;
  height: 46vw;
  max-width: 620px;
  max-height: 620px;
  top: -8%;
  right: -6%;
  background: radial-gradient(circle, rgba(34, 227, 214, 0.5), transparent 65%);
  animation: glowPulse 9s ease-in-out infinite;
}
.hero-bg .glow-2 {
  width: 40vw;
  height: 40vw;
  max-width: 540px;
  max-height: 540px;
  bottom: -12%;
  left: -8%;
  background: radial-gradient(circle, rgba(91, 140, 255, 0.45), transparent 65%);
  animation: glowPulse 11s ease-in-out infinite reverse;
}

.hero .container {
  position: relative;
  z-index: 1;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
}
.hero-eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px 1px var(--accent);
  animation: blink 2.4s ease-in-out infinite;
}

.hero-title {
  font-size: var(--fs-display);
  margin-bottom: var(--space-md);
}
.hero-title #heroGreeting {
  display: block;
  font-size: 0.42em;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0;
  margin-bottom: 0.4rem;
}
.hero-title .highlight {
  background: linear-gradient(110deg, var(--accent) 10%, var(--accent-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  font-weight: 500;
  color: var(--text-0);
  line-height: 1.4;
  margin-bottom: var(--space-md);
  max-width: 36ch;
}

.hero-description {
  color: var(--text-1);
  max-width: 52ch;
  margin-bottom: var(--space-lg);
}
.hero-description strong {
  color: var(--text-0);
  font-weight: 600;
}

.hero-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}
.highlight-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.85rem;
  color: var(--text-1);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
}
.highlight-item i {
  color: var(--accent);
  font-size: 0.85rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.social-links {
  display: flex;
  gap: var(--space-sm);
}
.social-links a {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: var(--text-1);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  font-size: 1.05rem;
  transition: transform var(--dur-fast) var(--ease-out), color var(--dur-fast),
    border-color var(--dur-fast), box-shadow var(--dur);
}
.social-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--glow-accent);
}

/* Headshot */
.hero-media {
  display: flex;
  justify-content: center;
}
.headshot-frame {
  position: relative;
  width: min(360px, 80vw);
  aspect-ratio: 1;
  border-radius: 28px;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-card), var(--glow-soft);
  overflow: hidden;
}
.headshot-frame::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: conic-gradient(
    from 180deg,
    var(--accent),
    var(--accent-2),
    transparent 55%,
    var(--accent) 100%
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  animation: ringSpin 12s linear infinite;
  opacity: 0.9;
}
.headshot-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(34, 227, 214, 0.16), transparent 55%);
  pointer-events: none;
}
.headshot-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.12) contrast(1.05);
}
.headshot-monogram {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 9vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.headshot-frame:not(.is-placeholder) .headshot-monogram {
  display: none;
}
.headshot-frame.is-placeholder img {
  display: none;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  display: grid;
  place-items: start center;
  padding-top: 7px;
  z-index: 1;
}
.hero-scroll span {
  width: 4px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  animation: scrollDot 1.8s ease-in-out infinite;
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about-content {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
.about-text p {
  color: var(--text-1);
  margin-bottom: var(--space-md);
}
.about-text p:last-child {
  margin-bottom: 0;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.stat-item {
  position: relative;
  padding: var(--space-lg);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out), border-color var(--dur);
}
.stat-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.stat-item:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}
.stat-item:hover::before {
  transform: scaleX(1);
}
.stat-item h3,
.stat-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text-0);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.stat-value .stat-suffix {
  color: var(--accent);
}
.stat-item p {
  font-size: 0.86rem;
  color: var(--text-2);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Experience timeline
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  padding-left: 2.2rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: var(--space-xl);
}
.timeline-item:last-child {
  margin-bottom: 0;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: calc(-2.2rem + 1px);
  top: 1.6rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px rgba(34, 227, 214, 0.12);
}
.timeline-content {
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur),
    box-shadow var(--dur);
}
.timeline-content:hover {
  transform: translateX(4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card);
}
.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}
.timeline-headline {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.timeline-logo {
  flex-shrink: 0;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  border: 1px solid var(--line);
}
.timeline-logo img {
  height: 100%;
  max-height: 30px;
  width: auto;
  max-width: 130px;
  object-fit: contain;
}
.timeline-logo--text {
  width: 48px;
  height: 48px;
  padding: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.03em;
}
.timeline-title {
  font-size: 1.2rem;
  color: var(--text-0);
}
.timeline-company {
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 500;
}
.timeline-location {
  font-size: 0.78rem;
  color: var(--text-2);
  font-family: var(--font-mono);
}
.timeline-period {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-1);
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.timeline-description > p {
  color: var(--text-1);
  margin-bottom: var(--space-sm);
}
.timeline-description ul {
  list-style: none;
  display: grid;
  gap: 0.55rem;
}
.timeline-description li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-1);
  font-size: 0.94rem;
}
.timeline-description li::before {
  content: "\25B9";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   Skills
   -------------------------------------------------------------------------- */
.skills-marquee {
  position: relative;
  overflow: hidden;
  margin-bottom: var(--space-xl);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track {
  display: flex;
  gap: var(--space-md);
  width: max-content;
  animation: marquee 36s linear infinite;
}
.skills-marquee:hover .marquee-track {
  animation-play-state: paused;
}
.marquee-item {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-1);
  padding: 0.45rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  background: var(--bg-2);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}
.skill-category {
  padding: var(--space-lg);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur);
}
.skill-category:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}
.skill-category h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.05rem;
  color: var(--text-0);
  margin-bottom: var(--space-md);
}
.skill-category h3 i {
  color: var(--accent);
  font-size: 1rem;
}
.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-tag {
  font-size: 0.82rem;
  color: var(--text-1);
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-2);
  transition: color var(--dur-fast), border-color var(--dur-fast),
    background var(--dur-fast), transform var(--dur-fast);
}
.skill-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   Projects
   -------------------------------------------------------------------------- */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-xl);
}
.filter-pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--text-1);
  padding: 0.5rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast),
    background var(--dur-fast);
}
.filter-pill:hover {
  color: var(--text-0);
  border-color: var(--line-strong);
}
.filter-pill.is-active {
  color: var(--accent-ink);
  background: var(--accent);
  border-color: var(--accent);
}

/* Case studies (featured) */
.case-studies {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.case-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: linear-gradient(160deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur),
    border-color var(--dur);
}
.case-cover {
  position: relative;
  height: 200px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.case-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.case-card:hover .case-cover img {
  transform: scale(1.04);
}
.case-cover .case-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(10, 11, 15, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.case-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-xl);
}
.case-card::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -30%;
  width: 60%;
  height: 120%;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  pointer-events: none;
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: var(--accent);
}
.case-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}
.case-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.3rem;
  border: 1px solid var(--line);
}
.case-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.case-badge i {
  font-size: 0.7rem;
}
.case-title {
  font-size: 1.4rem;
  color: var(--text-0);
  margin-bottom: var(--space-sm);
  position: relative;
}
.case-description {
  color: var(--text-1);
  font-size: 0.95rem;
  margin-bottom: var(--space-lg);
  position: relative;
}
.case-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  padding: var(--space-md) 0;
  margin-bottom: var(--space-md);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.case-metric .metric-value {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  line-height: 1;
}
.case-metric .metric-label {
  font-size: 0.78rem;
  color: var(--text-2);
  margin-top: 0.25rem;
}
.case-award {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-0);
  margin-bottom: var(--space-md);
}
.case-award i {
  color: #f5c451;
}
.case-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

/* Repo cards */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: var(--space-lg);
}
.project-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out), border-color var(--dur),
    box-shadow var(--dur);
}
.project-card.is-hidden {
  display: none;
}
.project-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: var(--shadow-card), var(--glow-soft);
}
.project-image {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 172px;
  font-size: 2rem;
  color: var(--accent);
  background: radial-gradient(circle at 50% 120%, var(--accent-soft), transparent 70%),
    var(--bg-2);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.project-card:hover .project-image img {
  transform: scale(1.05);
}
.project-content {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-lg);
}
.project-title {
  font-size: 1.05rem;
  color: var(--text-0);
  margin-bottom: 0.5rem;
  word-break: break-word;
}
.project-description {
  font-size: 0.88rem;
  color: var(--text-1);
  margin-bottom: var(--space-md);
}
.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-md);
  margin-top: auto;
}
.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-2);
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.project-links {
  display: flex;
  gap: var(--space-md);
}
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-1);
  transition: color var(--dur-fast);
}
.project-link:hover {
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   Education
   -------------------------------------------------------------------------- */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}
.education-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: transform var(--dur) var(--ease-out), border-color var(--dur);
}
.education-item:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}
.education-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}
.education-logo {
  flex-shrink: 0;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 7px;
  border: 1px solid var(--line);
}
.education-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}
.education-logo--text {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
  font-family: var(--font-display);
  font-weight: 800;
  padding: 0;
}
.education-degree {
  font-size: 1.1rem;
  color: var(--text-0);
}
.education-school {
  font-size: 0.9rem;
  color: var(--accent);
}
.education-period {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-2);
}
.education-item .timeline-description {
  display: inline-flex;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-1);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}
.certifications.is-empty {
  display: none;
}
.certifications {
  margin-top: var(--space-xl);
}
.certifications h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
  color: var(--text-0);
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}
.cert-item {
  padding: var(--space-md);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-0);
}

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */
.contact-intro {
  color: var(--text-1);
  margin-top: var(--space-md);
}
.contact-content {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-2xl);
  align-items: start;
}
.contact-info {
  display: grid;
  gap: var(--space-md);
}
.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color var(--dur), transform var(--dur);
}
.contact-item:hover {
  border-color: var(--line-strong);
  transform: translateX(3px);
}
.contact-item > i {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
}
.contact-item h3 {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.contact-item a,
.contact-item p {
  font-size: 0.95rem;
  color: var(--text-0);
}
.contact-item a:hover {
  color: var(--accent);
}

.contact-form {
  display: grid;
  gap: var(--space-md);
  padding: var(--space-xl);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.form-group label {
  display: block;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 0.4rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-0);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
  resize: vertical;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-2);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.contact-form .btn {
  justify-content: center;
}
.form-note {
  font-size: 0.82rem;
  color: var(--text-2);
  text-align: center;
}
.form-note a {
  color: var(--accent);
}
.form-status {
  font-size: 0.88rem;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  display: none;
}
.form-status.is-visible {
  display: block;
}
.form-status.is-success {
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(34, 227, 214, 0.3);
}
.form-status.is-error {
  color: #ff8d8d;
  background: rgba(255, 99, 99, 0.1);
  border: 1px solid rgba(255, 99, 99, 0.3);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--bg-1);
  border-top: 1px solid var(--line);
  padding: var(--space-2xl) 0 var(--space-xl);
  text-align: center;
}
.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.footer-tagline {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--text-0);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
}
.footer-links a {
  font-size: 0.9rem;
  color: var(--text-1);
  transition: color var(--dur-fast);
}
.footer-links a:hover {
  color: var(--accent);
}
#footerCopyright {
  font-size: 0.85rem;
  color: var(--text-2);
  margin-bottom: var(--space-sm);
}
.footer-disclaimer {
  font-size: 0.74rem;
  color: var(--text-2);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
  opacity: 0.8;
}

/* --------------------------------------------------------------------------
   Reveal animation
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--dur-slow) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   Keyframes
   -------------------------------------------------------------------------- */
@keyframes glowPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.45;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.6;
  }
}
@keyframes ringSpin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}
@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}
@keyframes scrollDot {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  70% {
    transform: translateY(14px);
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: left;
  }
  .hero-media {
    order: -1;
    justify-content: flex-start;
  }
  .headshot-frame {
    width: min(220px, 60vw);
  }
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-1);
    border-bottom: 1px solid var(--line);
    padding: var(--space-sm) var(--space-lg) var(--space-lg);
    transform: translateY(-130%);
    transition: transform var(--dur) var(--ease-out);
    box-shadow: var(--shadow-card);
  }
  .nav-menu.active {
    transform: translateY(0);
  }
  .nav-link {
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid var(--line);
  }
  .nav-link::after {
    display: none;
  }
  .nav-name {
    display: none;
  }
  section {
    padding: var(--space-2xl) 0;
  }
  .case-studies {
    grid-template-columns: 1fr;
  }
  .timeline-header {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta .btn {
    justify-content: center;
  }
  .about-stats {
    grid-template-columns: 1fr;
  }
  .case-metrics {
    gap: var(--space-md);
  }
}

/* --------------------------------------------------------------------------
   Scroll progress + back-to-top
   -------------------------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px -1px var(--accent);
  z-index: 200;
  transition: width 0.1s linear;
}
.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 150;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface-glass-strong);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-0);
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out),
    color var(--dur-fast), border-color var(--dur-fast), box-shadow var(--dur);
}
.back-to-top.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.back-to-top:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--glow-accent);
}

/* --------------------------------------------------------------------------
   Availability badge + clickable cards + hero entrance
   -------------------------------------------------------------------------- */
.hero-availability {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-1);
}
.avail-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #2bd96b;
  box-shadow: 0 0 0 0 rgba(43, 217, 107, 0.6);
  animation: availPulse 2.2s ease-out infinite;
}

.project-card.is-clickable {
  cursor: pointer;
}

.hero-content > * {
  opacity: 0;
  animation: heroIn 0.7s var(--ease-out) forwards;
}
.hero-eyebrow {
  animation-delay: 0.05s;
}
.hero-title {
  animation-delay: 0.15s;
}
.hero-subtitle {
  animation-delay: 0.25s;
}
.hero-description {
  animation-delay: 0.35s;
}
.hero-highlights {
  animation-delay: 0.45s;
}
.hero-cta {
  animation-delay: 0.55s;
}
.social-links {
  animation-delay: 0.65s;
}
.hero-availability {
  animation-delay: 0.75s;
}
.hero-media {
  opacity: 0;
  animation: heroMediaIn 0.9s var(--ease-out) 0.2s forwards;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes heroMediaIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@keyframes availPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(43, 217, 107, 0.55);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(43, 217, 107, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(43, 217, 107, 0);
  }
}

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .marquee-track {
    animation: none;
  }
  .hero-bg .glow,
  .headshot-frame::before,
  .hero-scroll span,
  .hero-eyebrow::before,
  .avail-dot {
    animation: none;
  }
  .hero-content > *,
  .hero-media {
    opacity: 1;
    animation: none;
  }
}