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

:root {
  --bg: #0a0a0b;
  --bg-card: #141416;
  --border: #27272a;
  --cyan: #22d3ee;
  --cyan-dim: rgba(34, 211, 238, 0.15);
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --white: #fafafa;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --container: 1120px;
  --nav-h: 72px;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a:hover {
  opacity: 0.8;
}

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

ul {
  list-style: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.938rem;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--cyan);
  color: var(--bg);
}

.btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

.btn--secondary:hover {
  border-color: var(--text-muted);
  color: var(--white);
  opacity: 1;
}

.btn--small {
  padding: 8px 18px;
  font-size: 0.875rem;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 10, 11, 0.7);
  border-bottom: 1px solid rgba(39, 39, 42, 0.5);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--white);
  letter-spacing: -0.02em;
}

.nav__logo:hover {
  opacity: 1;
}

.nav__logo-dot {
  color: var(--cyan);
}

.nav__links {
  display: flex;
  gap: 32px;
  margin-right: auto;
}

.nav__links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 400;
  transition: color 0.2s;
}

.nav__links a:hover {
  color: var(--white);
  opacity: 1;
}

.nav__cta {
  background: var(--cyan);
  color: var(--bg);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 40%, black 20%, transparent 100%);
}

.hero__content {
  position: relative;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
  padding: 80px 24px;
}

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--cyan);
  background: var(--cyan-dim);
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(34, 211, 238, 0.2);
  margin-bottom: 28px;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero__title em {
  font-style: italic;
  color: var(--cyan);
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Social Proof ===== */
.proof {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}

.proof__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.proof__text {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.proof__divider {
  width: 1px;
  height: 20px;
  background: var(--border);
}

.proof__list {
  display: flex;
  gap: 20px;
}

.proof__list li {
  font-family: var(--font-mono);
  font-size: 0.813rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

/* ===== Sections (shared) ===== */
.section {
  padding: 120px 0;
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.813rem;
  font-weight: 500;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 40px;
}

/* ===== About ===== */
.about__content {
  max-width: 680px;
}

.about__bio {
  font-size: 1.125rem;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about__bio:last-of-type {
  margin-bottom: 40px;
}

.about__highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.about__highlights li {
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.about__highlight-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.about__highlight-value {
  font-size: 0.938rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== Projects ===== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px;
  transition: border-color 0.2s;
}

.project-card:hover {
  border-color: var(--text-dim);
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.project-card__title {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--white);
  text-transform: uppercase;
}

.project-card__star-count {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.813rem;
  color: var(--text-muted);
}

.project-card__stars {
  height: 20px;
  width: auto;
}

.project-card__desc {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.project-card__features {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.project-card__features li {
  font-size: 0.938rem;
  color: var(--text);
  padding-left: 20px;
  position: relative;
}

.project-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
}

.project-card__tech {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

/* ===== Demo ===== */
.demo__sub {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.demo__terminal {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  background: #0c0c0e;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}

.demo__panel {
  display: flex;
  flex-direction: column;
  min-height: 360px;
}

.demo__panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.demo__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.demo__dot--red { background: #ef4444; }
.demo__dot--yellow { background: #eab308; }
.demo__dot--green { background: #22c55e; }

.demo__panel-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: 8px;
}

.demo__panel-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.813rem;
  line-height: 1.8;
  flex-grow: 1;
}

.demo__divider {
  width: 1px;
  background: var(--border);
}

.demo__line {
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.demo__line.is-typed {
  opacity: 1;
  transform: translateY(0);
}

.demo__line--cmd {
  color: var(--text-dim);
}

.demo__line--output {
  color: var(--text);
}

.demo__line--warn {
  color: #f87171;
}

.demo__line--success {
  color: #4ade80;
}

.demo__line--cyan {
  color: var(--cyan);
}

.demo__line--muted {
  color: var(--text-dim);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  background: rgba(39, 39, 42, 0.5);
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* ===== Writing ===== */
.writing__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.writing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s;
}

.writing-card:hover {
  border-color: var(--text-dim);
}

.writing-card__title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--white);
  line-height: 1.4;
  margin-bottom: 12px;
}

.writing-card__excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.writing-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.writing-card__date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.writing-card__link {
  font-size: 0.813rem;
  font-weight: 500;
  color: var(--cyan);
}

.writing__more {
  display: inline-block;
  font-size: 0.938rem;
  font-weight: 500;
  color: var(--cyan);
}

/* Skeleton loading */
.skeleton-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, rgba(39, 39, 42, 0.3) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 6px;
}

.skeleton--title {
  height: 20px;
  width: 80%;
  margin-bottom: 16px;
}

.skeleton--text {
  height: 14px;
  width: 100%;
  margin-bottom: 10px;
}

.skeleton--short {
  width: 60%;
}

.skeleton--meta {
  height: 12px;
  width: 40%;
  margin-top: 20px;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ===== Contact / Waitlist ===== */
.contact {
  text-align: center;
}

.contact__sub {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 36px;
}

.contact__form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.contact__input {
  flex: 1;
  min-width: 240px;
  padding: 12px 18px;
  font-family: var(--font-sans);
  font-size: 0.938rem;
  color: var(--white);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
}

.contact__input::placeholder {
  color: var(--text-dim);
}

.contact__input:focus {
  border-color: var(--cyan);
}

.contact__submit {
  flex-shrink: 0;
}

.contact__status {
  font-size: 0.875rem;
  min-height: 1.4em;
  margin-bottom: 32px;
}

.contact__status--success {
  color: #4ade80;
}

.contact__status--error {
  color: #f87171;
}

.contact__socials {
  display: flex;
  gap: 20px;
  justify-content: center;
}

.contact__socials a {
  color: var(--text-dim);
  transition: color 0.2s;
}

.contact__socials a:hover {
  color: var(--cyan);
  opacity: 1;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer__copy,
.footer__location {
  font-size: 0.813rem;
  color: var(--text-dim);
}

.footer__legal {
  font-size: 0.813rem;
  color: var(--text-dim);
}

.footer__legal:hover {
  color: var(--text-muted);
  opacity: 1;
}

/* ===== Scroll Animations ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Mobile Nav ===== */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__inner {
    justify-content: space-between;
  }

  .nav.nav--open .nav__links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }

  .nav.nav--open .nav__cta {
    display: inline-flex;
    position: absolute;
    top: calc(var(--nav-h) + 140px);
    left: 24px;
    right: 24px;
    justify-content: center;
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding-bottom: 24px;
  }

  .nav--open .nav__toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav--open .nav__toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav--open .nav__toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }

  .hero__content {
    padding: 60px 24px;
  }

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

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

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

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

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

  .demo__divider {
    width: 100%;
    height: 1px;
  }

  .demo__panel {
    min-height: auto;
  }

  .demo__panel-body {
    font-size: 0.75rem;
    padding: 16px;
    overflow-x: auto;
  }

  .proof__inner {
    flex-direction: column;
    gap: 12px;
  }

  .proof__divider {
    width: 40px;
    height: 1px;
  }

  .project-card {
    padding: 24px;
  }

  .contact__form {
    flex-direction: column;
  }

  .contact__input {
    min-width: 0;
  }
}

@media (max-width: 375px) {
  .container {
    padding: 0 16px;
  }

  .hero__title {
    font-size: 2.25rem;
  }

  .about__bio {
    font-size: 1rem;
  }
}

@media (min-width: 1440px) {
  :root {
    --container: 1200px;
  }
}