:root {
  /* Central theme tokens used across the whole page. */
  --bg: #030305;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-strong: rgba(255, 255, 255, 0.105);
  --text: #ffffff;
  --muted: #a6a9b8;
  --line: rgba(255, 255, 255, 0.13);
  --accent: #7c3cff;
  --accent-2: #00e7ff;
  --accent-3: #ff3df2;
  --shadow: 0 24px 90px rgba(0, 0, 0, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 7%, rgba(124, 60, 255, 0.22), transparent 31rem),
    radial-gradient(circle at 88% 10%, rgba(0, 231, 255, 0.14), transparent 30rem),
    radial-gradient(circle at 56% 44%, rgba(255, 61, 242, 0.07), transparent 34rem),
    radial-gradient(circle at 18% 82%, rgba(0, 231, 255, 0.08), transparent 26rem),
    linear-gradient(135deg, #030305 0%, #080812 45%, #030305 100%);
  color: var(--text);
  font-family:
    Inter,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 88px 88px;
}

::selection {
  background: var(--accent-2);
  color: #001014;
}

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

.preloader {
  /* Covers the page until the first GSAP timeline reveals the hero. */
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  gap: 1rem;
  background: #030305;
}

.preloader__ring {
  width: 5rem;
  height: 5rem;
  border: 1px solid var(--line);
  border-top-color: var(--accent-2);
  border-radius: 50%;
}

.preloader__text {
  position: absolute;
  margin-top: 8.5rem;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

.site-header {
  /* Floating glass navigation that stays visible while scrolling. */
  position: fixed;
  top: 1.2rem;
  left: 50%;
  z-index: 20;
  display: flex;
  width: min(1120px, calc(100% - 2rem));
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.035)),
    rgba(3, 3, 5, 0.88);
  box-shadow:
    0 18px 60px rgba(0, 0, 0, 0.34),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transform: translateX(-50%);
}

.logo {
  display: grid;
  width: 2.6rem;
  height: 2.6rem;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  font-weight: 900;
  box-shadow: 0 0 30px rgba(124, 60, 255, 0.45);
}

.nav {
  display: flex;
  gap: 0.35rem;
}

.nav a {
  padding: 0.8rem 1rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  transition: 0.25s ease;
}

.nav a:hover {
  background: var(--panel-strong);
  color: var(--text);
}

.section {
  /* Shared content width and vertical rhythm for every page section. */
  position: relative;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 8rem 0;
}

.section::before {
  position: absolute;
  top: 15%;
  right: -12%;
  z-index: -1;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  pointer-events: none;
  content: "";
  background: radial-gradient(
    circle,
    rgba(124, 60, 255, 0.16),
    rgba(0, 231, 255, 0.06) 42%,
    transparent 68%
  );
}

.hero {
  /* First screen layout: text on the left, animated card on the right. */
  display: grid;
  min-height: 100vh;
  grid-template-columns: minmax(0, 1.2fr) minmax(20rem, 0.8fr);
  align-items: center;
  gap: 4rem;
  padding-top: 9rem;
}

.hero::before {
  top: 17%;
  right: 8%;
  width: min(34rem, 58vw);
  height: min(34rem, 58vw);
  background:
    radial-gradient(circle, rgba(0, 231, 255, 0.16), transparent 58%),
    conic-gradient(
      from 140deg,
      rgba(124, 60, 255, 0.18),
      rgba(0, 231, 255, 0.08),
      rgba(255, 61, 242, 0.13),
      rgba(124, 60, 255, 0.18)
    );
}

.hero__grid {
  /* Decorative static grid; keeping it still prevents background shimmer. */
  position: absolute;
  inset: 12% -8% 4%;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.12;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent-2);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero__title,
.contact h2 {
  margin: 0;
  font-size: clamp(2.8rem, 8.2vw, 7.1rem);
  font-weight: 900;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

.hero__title {
  max-width: 10ch;
}

.contact h2 {
  max-width: 12ch;
}

.word {
  /* Wrapper that hides characters before the split-text reveal animation. */
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
}

.char {
  display: inline-block;
}

.hero__subtitle {
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: clamp(1.2rem, 2vw, 1.8rem);
}

.hero__lead {
  max-width: 43rem;
  margin: 2rem 0 0;
  color: #d9dbe7;
  font-size: clamp(1.1rem, 1.9vw, 1.42rem);
  line-height: 1.65;
}

.hero__actions,
.contact__links,
.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.3rem;
}

.button,
.contact__links a,
.link-row a {
  /* Shared pill style for primary actions and external links. */
  position: relative;
  overflow: hidden;
  padding: 0.95rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.105), rgba(255, 255, 255, 0.035)),
    rgba(3, 3, 5, 0.72);
  color: white;
  font-weight: 800;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 12px 35px rgba(0, 0, 0, 0.24);
}

.button::after,
.contact__links a::after,
.link-row a::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: translateX(-120%);
}

.button:hover::after,
.contact__links a:hover::after,
.link-row a:hover::after {
  transition: transform 0.7s ease;
  transform: translateX(120%);
}

.button--primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.18) inset,
    0 0 38px rgba(0, 231, 255, 0.25);
}

.hero-card,
.glass-panel,
.project-card,
.achievement-card,
.tech-group {
  /* Reusable glassmorphism surface for cards and panels. */
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 2rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.035)),
    radial-gradient(circle at 15% 0%, rgba(124, 60, 255, 0.18), transparent 18rem),
    rgba(3, 3, 5, 0.76);
  box-shadow:
    var(--shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.hero-card {
  position: relative;
  min-height: 31rem;
  overflow: hidden;
  padding: 2rem;
}

.hero-card__halo {
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(0, 231, 255, 0.18), transparent 57%),
    conic-gradient(
      from 0deg,
      rgba(124, 60, 255, 0.34),
      rgba(0, 231, 255, 0.2),
      rgba(255, 61, 242, 0.24),
      rgba(124, 60, 255, 0.34)
    );
  opacity: 0.28;
}

.hero-card__label {
  position: relative;
  color: var(--muted);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.orbit {
  /* Circular stack visualization; JS rotates the whole orbit continuously. */
  position: relative;
  display: grid;
  height: 15rem;
  margin: 2rem 0;
  place-items: center;
  border: 1px solid rgba(0, 231, 255, 0.22);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.04), transparent 64%);
}

.orbit::before,
.orbit::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
}

.orbit::before {
  inset: 2rem;
}

.orbit::after {
  inset: 4.5rem;
}

.orbit span {
  position: absolute;
  display: grid;
  width: 4rem;
  height: 4rem;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  background:
    linear-gradient(135deg, rgba(124, 60, 255, 0.32), rgba(0, 231, 255, 0.16)), rgba(3, 3, 5, 0.92);
  font-weight: 900;
  font-size: 0.86rem;
  box-shadow:
    0 0 22px rgba(0, 231, 255, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.orbit span:nth-child(1) {
  transform: translateY(-7.5rem);
}

.orbit span:nth-child(2) {
  transform: translate(6.5rem, -3.75rem);
}

.orbit span:nth-child(3) {
  transform: translate(6.5rem, 3.75rem);
}

.orbit span:nth-child(4) {
  transform: translateY(7.5rem);
}

.orbit span:nth-child(5) {
  transform: translate(-6.5rem, 3.75rem);
}

.orbit span:nth-child(6) {
  transform: translate(-6.5rem, -3.75rem);
}

.hero-card ul,
.extras {
  position: relative;
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: #d8dae8;
}

.hero-card li,
.extras li {
  padding-left: 1.1rem;
  border-left: 2px solid var(--accent-2);
}

.section-heading {
  max-width: 48rem;
  margin-bottom: 2rem;
}

.section-heading h2,
.glass-panel h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.055em;
  line-height: 1;
}

.section-heading span {
  display: inline-block;
  margin-top: 1rem;
  color: var(--muted);
  font-weight: 700;
}

.about {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 4rem;
}

.about__text p,
.glass-panel p,
.project-card p,
.achievement-card p {
  color: #cfd1df;
  font-size: 1.08rem;
  line-height: 1.75;
}

.education .glass-panel p {
  color: #fff;
  font-size: clamp(1.18rem, 2vw, 1.4rem);
  line-height: 1.75;
}

.section-heading .eyebrow,
.contact > .eyebrow {
  color: var(--accent-2);
  font-size: 0.8rem;
  line-height: normal;
}

.glass-panel {
  padding: clamp(1.4rem, 4vw, 3rem);
}

.timeline {
  display: grid;
  gap: 0;
  margin-top: 2rem;
}

.timeline div {
  /* Timeline item: top border and glowing dot create a vertical rhythm. */
  position: relative;
  padding: 1.1rem 0 1.1rem 2rem;
  border-top: 1px solid var(--line);
  color: #e6e7ef;
}

.timeline div::before {
  position: absolute;
  top: 1.45rem;
  left: 0;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow:
    0 0 18px rgba(0, 231, 255, 0.65),
    0 0 0 6px rgba(0, 231, 255, 0.08);
  content: "";
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.project-card {
  /* Cards keep 3D context so JS hover tilt has depth. */
  position: relative;
  min-height: 22rem;
  overflow: hidden;
  padding: 1.4rem;
  transform-style: preserve-3d;
}

.project-card::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(circle at 24% 18%, rgba(0, 231, 255, 0.16), transparent 35%), transparent;
}

.project-card span {
  color: var(--accent-2);
  font-weight: 900;
}

.project-card h3 {
  margin: 4rem 0 1rem;
  font-size: 1.55rem;
  letter-spacing: -0.04em;
}

.project-card a {
  display: inline-flex;
  margin-top: 1rem;
  color: var(--accent-2);
  font-weight: 900;
}

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

.achievement-card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
}

.achievement-card::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    radial-gradient(circle at 12% 0%, rgba(0, 231, 255, 0.14), transparent 34%), transparent;
}

.achievement-card span,
.achievement-card h3,
.achievement-card p,
.achievement-card a {
  position: relative;
}

.achievement-card span {
  display: inline-flex;
  margin-bottom: 1.2rem;
  color: var(--accent-2);
  font-weight: 900;
  letter-spacing: 0.12em;
}

.achievement-card h3 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.achievement-card a {
  display: inline-flex;
  margin-top: 1rem;
  color: var(--accent-2);
  font-weight: 900;
}

.marquee {
  /* Masks the moving project strip so it loops beyond the viewport. */
  overflow: hidden;
  border-block: 1px solid var(--line);
  padding: 1.4rem 0;
}

.marquee__track {
  display: flex;
  width: max-content;
  gap: 2rem;
  color: transparent;
  font-size: clamp(2.2rem, 7vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.42);
}

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

.tech-group {
  position: relative;
  overflow: hidden;
  padding: 1.4rem;
}

.tech-group::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(
    120deg,
    rgba(124, 60, 255, 0.12),
    transparent 42%,
    rgba(0, 231, 255, 0.08)
  );
}

.tech-group h3 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}

.tech-cloud {
  /* Flexible pill cloud that wraps naturally on smaller screens. */
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.tech-cloud span {
  position: relative;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.025)),
    rgba(255, 255, 255, 0.035);
  color: #eef0f8;
  font-weight: 800;
}

.contact {
  min-height: 75vh;
  display: grid;
  align-content: center;
}

.contact__links a {
  font-size: clamp(1rem, 2vw, 1.3rem);
}

@media (max-width: 900px) {
  /* Tablet layout: hide nav and stack complex columns. */
  .nav {
    display: none;
  }

  .hero,
  .about {
    grid-template-columns: 1fr;
  }

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

  .tech-groups {
    grid-template-columns: 1fr;
  }

  .achievement-list {
    grid-template-columns: 1fr;
  }

  .hero-card {
    min-height: auto;
  }
}

@media (max-width: 620px) {
  /* Mobile tuning: less vertical spacing and no cursor glow on touch screens. */
  .section {
    padding: 5rem 0;
  }

  .hero {
    padding-top: 8rem;
  }

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