/* ============================================
   CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Backgrounds */
  --deep-space: #0a0520;
  --void: #0f0a2a;

  /* Accent gradient */
  --nebula-start: #7c3aed;
  --nebula-end: #3b82f6;
  --nebula-gradient: linear-gradient(135deg, var(--nebula-start), var(--nebula-end));

  /* Text */
  --star-white: #f0f0ff;
  --body-text: #a0a8c8;
  --muted: #6b7280;
  --label-blue: #7c8aff;

  /* Accents */
  --purple-accent: #7c3aed;
  --blue-accent: #3b82f6;
  --light-purple: #c4b5fd;

  /* Transparency helpers */
  --purple-bg-subtle: rgba(124, 58, 237, 0.06);
  --purple-border-subtle: rgba(124, 58, 237, 0.2);
  --blue-bg-subtle: rgba(59, 130, 246, 0.04);
  --blue-border-subtle: rgba(59, 130, 246, 0.15);

  /* Footer */
  --footer-bg: #060315;
  --footer-text: #4a4a6a;
  /* Blue pill text */
  --blue-pill-text: #93c5fd;

  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Spacing */
  --container-max: 1100px;
  --section-padding: 5rem 2rem;
}

/* ============================================
   RESET & BASE
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--body-text);
  background-color: var(--deep-space);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--light-purple);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--star-white);
}

h1, h2, h3, h4 {
  color: var(--star-white);
  line-height: 1.3;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--label-blue);
  margin-bottom: 0.5rem;
}

.page-heading {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.section-heading {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--body-text);
  max-width: 500px;
  margin: 0 auto;
}

.tech-pill {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.tech-pill--purple {
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.25);
  color: var(--light-purple);
}

.tech-pill--blue {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--blue-pill-text);
}

/* ============================================
   FOCUS STYLES (Keyboard Navigation)
   ============================================ */
.btn:focus-visible,
.nav__link:focus-visible,
.nav__logo:focus-visible,
.nav__resume:focus-visible,
.nav__hamburger:focus-visible,
.contact__social-link:focus-visible,
.footer__links a:focus-visible,
.project-card:focus-visible {
  outline: 2px solid var(--light-purple);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--nebula-gradient);
  color: white;
}

.btn--primary:hover {
  color: white;
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.btn--secondary {
  background: transparent;
  border: 1px solid rgba(124, 58, 237, 0.4);
  color: var(--light-purple);
}

.btn--secondary:hover {
  color: var(--star-white);
  border-color: rgba(124, 58, 237, 0.7);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0.75rem 2rem;
  background: rgba(10, 5, 32, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(120, 100, 255, 0.1);
}

.nav__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--star-white);
}

.nav__logo:hover {
  color: var(--star-white);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav__link {
  font-size: 0.9rem;
  color: var(--body-text);
}

.nav__link:hover {
  color: var(--star-white);
}

.nav__resume {
  padding: 0.3rem 0.8rem;
  background: var(--nebula-gradient);
  border-radius: 6px;
  color: white;
  font-size: 0.8rem;
  font-weight: 600;
}

.nav__resume:hover {
  color: white;
  box-shadow: 0 2px 12px rgba(124, 58, 237, 0.4);
}

/* Hamburger button */
.nav__hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--star-white);
}

/* Mobile overlay menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 5, 32, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.nav__mobile-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav__mobile-menu a {
  font-size: 1.5rem;
  color: var(--star-white);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, var(--deep-space) 0%, #0d1033 40%, #120a2e 70%, var(--deep-space) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero__label {
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--label-blue);
  margin-bottom: 1rem;
}

.hero__name {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--star-white);
  margin-bottom: 1.25rem;
}

.hero__tagline {
  font-size: 1.15rem;
  color: var(--body-text);
  max-width: 480px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero__ctas {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.hero__social {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
}

.hero__social a {
  color: var(--muted);
  transition: color 0.2s;
}

.hero__social a:hover {
  color: var(--light-purple);
}

.hero__social svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--muted), transparent);
}

/* ============================================
   STARFIELD
   ============================================ */
.starfield {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.star {
  position: absolute;
  border-radius: 50%;
  background: white;
}

.nebula {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@media (prefers-reduced-motion: no-preference) {
  .star {
    animation: twinkle var(--twinkle-duration, 3s) ease-in-out infinite,
               drift var(--drift-duration, 6s) ease-in-out infinite;
    animation-delay: var(--star-delay, 0s);
  }
}

/* ============================================
   ABOUT
   ============================================ */
.about {
  background: var(--void);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 3rem;
  align-items: center;
}

.about__photo-wrapper {
  text-align: center;
}

.about__photo-ring {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--nebula-gradient);
  padding: 3px;
  margin: 0 auto;
}

.about__photo {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.about__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.about__heading {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  line-height: 1.3;
}

.about__text {
  margin-bottom: 1rem;
}

.about__ctas {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects-section {
  text-align: center;
}

.projects-section--agentic {
  background: var(--deep-space);
}

.projects-section--traditional {
  background: var(--void);
}

.projects-section__header {
  margin-bottom: 2.5rem;
}

.projects-section__subtitle {
  margin: 0 auto;
}

/* ============================================
   PROJECT CARDS
   ============================================ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  max-width: var(--container-max);
  margin: 0 auto;
  text-align: left;
}

.project-card {
  background: var(--purple-bg-subtle);
  border: 1px solid var(--purple-border-subtle);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  display: block;
  color: inherit;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(124, 58, 237, 0.15);
  color: inherit;
}

.project-card--traditional {
  background: var(--blue-bg-subtle);
  border-color: var(--blue-border-subtle);
}

.project-card--traditional:hover {
  box-shadow: 0 8px 30px rgba(59, 130, 246, 0.15);
}

.project-card__image {
  position: relative;
  height: 160px;
  background: linear-gradient(135deg, #1a103a, #1e1545);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-card__image img,
.project-card__image video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card__badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.2rem 0.5rem;
  background: rgba(124, 58, 237, 0.3);
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--light-purple);
  letter-spacing: 0.05em;
}

.project-card__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.project-card__placeholder svg {
  width: 32px;
  height: 32px;
  fill: currentColor;
  opacity: 0.5;
}

.project-card__body {
  padding: 1rem;
}

.project-card__name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.project-card__desc {
  font-size: 0.8rem;
  line-height: 1.5;
  margin-bottom: 0.75rem;
  color: var(--body-text);
}

.project-card__pills {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.project-card__pills .tech-pill {
  font-size: 0.65rem;
  padding: 0.15rem 0.5rem;
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
  background: var(--deep-space);
  text-align: center;
}

.contact__inner {
  max-width: 600px;
  margin: 0 auto;
}

.contact__heading {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact__text {
  margin-bottom: 2rem;
  font-size: 1rem;
  line-height: 1.7;
}

.contact__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact__card {
  padding: 1.25rem;
  background: var(--purple-bg-subtle);
  border: 1px solid var(--purple-border-subtle);
  border-radius: 10px;
}

.contact__card-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--label-blue);
  margin-bottom: 0.5rem;
}

.contact__card-value {
  color: var(--light-purple);
  font-size: 0.95rem;
}

.contact__social {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.contact__social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--light-purple);
  transition: background 0.2s, transform 0.2s;
}

.contact__social-link:hover {
  background: rgba(124, 58, 237, 0.2);
  transform: translateY(-2px);
  color: var(--star-white);
}

.contact__social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--footer-bg);
  padding: 1.5rem 2rem;
}

.footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copyright {
  color: var(--footer-text);
  font-size: 0.8rem;
}

.footer__links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}

.footer__links a {
  color: var(--footer-text);
  font-size: 0.8rem;
}

.footer__links a:hover {
  color: var(--body-text);
}

/* ============================================
   PROJECT DETAIL PAGE
   ============================================ */
.project-detail {
  padding-top: 4rem; /* account for fixed nav */
}

.project-detail__hero {
  padding: 3rem 0 2rem;
}

.project-detail__badge-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.project-detail__badge {
  padding: 0.25rem 0.6rem;
  background: rgba(124, 58, 237, 0.25);
  border: 1px solid rgba(124, 58, 237, 0.35);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--light-purple);
  letter-spacing: 0.05em;
}

.project-detail__badge-text {
  color: var(--muted);
  font-size: 0.8rem;
}

.project-detail__title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.project-detail__tagline {
  font-size: 1.1rem;
  color: var(--body-text);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.project-detail__ctas {
  display: flex;
  gap: 0.75rem;
}

.project-detail__demo {
  margin: 2rem 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--purple-border-subtle);
}

.project-detail__demo img,
.project-detail__demo video {
  width: 100%;
  display: block;
}

.project-detail__demo-placeholder {
  height: 300px;
  background: linear-gradient(135deg, #1a103a, #1e1545);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Problem / Solution */
.project-detail__ps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.project-detail__ps-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--label-blue);
  margin-bottom: 0.5rem;
}

.project-detail__ps-text {
  line-height: 1.7;
  font-size: 0.9rem;
}

/* Tech Stack */
.project-detail__tech {
  margin-bottom: 2.5rem;
}

.project-detail__tech-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--label-blue);
  margin-bottom: 1rem;
}

.project-detail__tech-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.project-detail__tech-pills .tech-pill {
  font-size: 0.8rem;
  padding: 0.35rem 0.85rem;
}

/* Key Features */
.project-detail__features {
  margin-bottom: 2.5rem;
}

.project-detail__features-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--label-blue);
  margin-bottom: 1rem;
}

.project-detail__features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.project-detail__feature-card {
  padding: 1rem;
  background: var(--purple-bg-subtle);
  border: 1px solid rgba(124, 58, 237, 0.12);
  border-radius: 8px;
}

.project-detail__feature-card h4 {
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
}

.project-detail__feature-card p {
  font-size: 0.8rem;
  line-height: 1.5;
}

/* Prev / Next */
.project-detail__nav {
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid rgba(124, 58, 237, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.project-detail__nav-direction {
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 0.25rem;
}

.project-detail__nav-title {
  font-size: 0.9rem;
  color: var(--light-purple);
}

.project-detail__nav-link {
  display: block;
}

.project-detail__nav-link:hover .project-detail__nav-title {
  color: var(--star-white);
}

.project-detail__nav-link--next {
  text-align: right;
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */

/* Fade-in animations — only active when JS has initialized */
.js-ready .fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  .js-ready .fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* If JS is ready but user prefers reduced motion, show immediately */
@media (prefers-reduced-motion: reduce) {
  .js-ready .fade-in {
    opacity: 1;
    transform: none;
  }
}

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

/* Tablet */
@media (max-width: 1023px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about__ctas {
    justify-content: center;
  }

  .hero__name {
    font-size: 2.8rem;
  }
}

/* Mobile */
@media (max-width: 767px) {
  :root {
    --section-padding: 3rem 1.25rem;
  }

  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: block;
  }

  .nav__mobile-menu {
    display: flex;
  }

  .hero__name {
    font-size: 2.2rem;
  }

  .hero__tagline {
    font-size: 1rem;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

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

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

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

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

  .footer__inner {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}