@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --electric-cobalt: #1f58f2;
  --signal-orange: #ff4105;
  --void-black: #000000;
  --obsidian: #0d0d0f;
  --charcoal: #232529;
  --graphite: #2b2f33;
  --ice-white: #d8eaff;
  --muted-ice: #8ea3bf;
  --border-soft: rgba(216, 234, 255, 0.1);
  --border-mid: rgba(216, 234, 255, 0.2);
  --font-display: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-display);
  background-color: var(--void-black);
  color: var(--ice-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--electric-cobalt);
  color: var(--ice-white);
}

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

a {
  color: inherit;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 400;
}

p {
  margin: 0;
}

ul {
  margin: 0;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.container-narrow {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding: 96px 0;
  background: var(--void-black);
}

.section--tight {
  padding: 64px 0;
}

.section--alt {
  background: var(--obsidian);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}

.section--bordered-bottom {
  border-bottom: 1px solid var(--border-soft);
}

.section--bordered-top {
  border-top: 1px solid var(--border-soft);
}

main {
  padding-top: 64px;
}

/* ===== TYPOGRAPHY ===== */
.headline-display {
  font-family: var(--font-display);
  line-height: 1;
  letter-spacing: -0.03em;
  font-size: clamp(40px, 8vw, 96px);
}

.headline-page {
  font-family: var(--font-display);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-size: clamp(36px, 6vw, 72px);
}

.headline-section {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-size: clamp(28px, 4vw, 48px);
}

.headline-sub {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-size: clamp(26px, 3vw, 36px);
}

.micro-label {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-ice);
}

.micro-label--xs {
  font-size: 10px;
}

.micro-label--cobalt {
  color: var(--electric-cobalt);
}

.micro-label--orange {
  color: var(--signal-orange);
}

.micro-label--light {
  color: var(--ice-white);
}

.mono-text {
  font-family: var(--font-mono);
}

.accent {
  color: var(--electric-cobalt);
}

.lead {
  color: var(--muted-ice);
  font-size: 18px;
  line-height: 1.7;
  max-width: 640px;
}

.body-text {
  color: var(--muted-ice);
  line-height: 1.7;
}

.body-text p + p {
  margin-top: 18px;
}

.text-sm {
  font-size: 14px;
}

.text-xs {
  font-size: 12px;
}

.stack-sm > * + * {
  margin-top: 12px;
}

.mb-4 {
  margin-bottom: 16px;
}

.mb-6 {
  margin-bottom: 24px;
}

.mb-8 {
  margin-bottom: 32px;
}

.mb-12 {
  margin-bottom: 48px;
}

.mt-8 {
  margin-top: 32px;
}

.mt-12 {
  margin-top: 48px;
}

.block {
  display: block;
}

.center {
  text-align: center;
}

/* ===== BUTTONS ===== */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 8px;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all 200ms ease-in-out;
}

.btn-primary {
  border: 1px solid var(--signal-orange);
  color: var(--signal-orange);
}

.btn-primary:hover {
  background: var(--graphite);
}

.btn-secondary {
  border: 1px solid var(--ice-white);
  color: var(--ice-white);
}

.btn-secondary:hover {
  background: var(--graphite);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 10px;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn-row--center {
  justify-content: center;
}

/* ===== CARDS ===== */
.card {
  display: block;
  background: var(--charcoal);
  border: 1px solid var(--border-mid);
  border-radius: 16px;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: border-color 200ms ease-in-out;
}

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

.card__title {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-bottom: 12px;
}

.card__title--sm {
  font-size: 16px;
}

.card__text {
  color: var(--muted-ice);
  font-size: 14px;
  line-height: 1.7;
}

.card--pad-lg {
  padding: 32px;
}

.card--contact {
  display: flex;
  align-items: center;
  gap: 16px;
}

.icon {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.icon--sm {
  width: 14px;
  height: 14px;
}

.icon--xs {
  width: 12px;
  height: 12px;
}

.card__icon {
  color: var(--ice-white);
  margin-bottom: 16px;
}

.card:hover .card__icon {
  color: var(--electric-cobalt);
}

/* ===== GRIDS ===== */
.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
}

.grid--gap-lg {
  gap: 48px;
}

.section-head {
  margin-bottom: 48px;
}

.section-head--center {
  text-align: center;
}

.section-head__label {
  margin-bottom: 16px;
}

.split-head {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 48px;
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--void-black);
  border-bottom: 1px solid var(--border-mid);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.brand {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--ice-white);
  text-decoration: none;
  transition: color 200ms ease-in-out;
}

.brand:hover {
  color: var(--electric-cobalt);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted-ice);
  padding-bottom: 2px;
  transition: color 150ms ease-in-out;
}

.site-nav a:hover {
  color: var(--ice-white);
}

.site-nav a.is-active {
  color: var(--signal-orange);
  border-bottom: 1px solid var(--signal-orange);
}

.site-nav .btn-primary {
  color: var(--signal-orange);
  border-bottom: none;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-align: center;
  padding: 96px 0;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-color: var(--void-black);
  background-image: radial-gradient(
      circle at 20% 20%,
      rgba(31, 88, 242, 0.18),
      transparent 45%
    ),
    radial-gradient(circle at 80% 30%, rgba(255, 65, 5, 0.1), transparent 40%),
    radial-gradient(rgba(216, 234, 255, 0.16) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 28px 28px;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 25%,
    rgba(0, 0, 0, 0.85) 85%
  );
}

.hero__inner {
  position: relative;
  z-index: 1;
}

.hero__title {
  margin-bottom: 32px;
}

.hero__text {
  color: var(--muted-ice);
  font-size: 19px;
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto 48px;
}

/* ===== PHOTO ===== */
.portrait {
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  overflow: hidden;
  width: 100%;
  max-width: 320px;
}

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portrait--about {
  max-width: 384px;
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--border-soft);
  flex-shrink: 0;
}

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== FRAMEWORK LIST ===== */
.framework {
  display: flex;
  gap: 16px;
  padding: 16px;
  border-radius: 12px;
  background: var(--charcoal);
  border: 1px solid var(--border-soft);
  transition: border-color 200ms ease-in-out;
}

.framework:hover {
  border-color: rgba(31, 88, 242, 0.5);
}

.framework__code {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: 8px;
  background: rgba(31, 88, 242, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--electric-cobalt);
}

.framework__name {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.framework__desc {
  color: var(--muted-ice);
  font-size: 12px;
  line-height: 1.6;
}

.framework-list > * + * {
  margin-top: 24px;
}

.source-chip {
  padding: 16px;
  border-radius: 12px;
  background: var(--charcoal);
  border: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ice-white);
}

.chip {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-mid);
  color: var(--muted-ice);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.metric-box {
  display: inline-block;
  padding: 16px;
  border-radius: 12px;
  background: var(--charcoal);
  border: 1px solid var(--border-soft);
}

.metric-box__value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--electric-cobalt);
}

/* ===== LISTS ===== */
.marker-list {
  list-style: none;
  padding: 0;
  color: var(--muted-ice);
  font-size: 14px;
  line-height: 1.6;
}

.marker-list li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.marker-list li + li {
  margin-top: 10px;
}

.marker-list .marker {
  color: var(--electric-cobalt);
  flex-shrink: 0;
}

.marker-list .marker--orange {
  color: var(--signal-orange);
}

.link-list {
  list-style: none;
  padding: 0;
}

.link-list li + li {
  margin-top: 12px;
}

.link-list a {
  color: var(--muted-ice);
  text-decoration: none;
  font-size: 14px;
  transition: color 200ms ease-in-out;
}

.link-list a:hover {
  color: var(--ice-white);
}

/* ===== TIMELINE ===== */
.timeline__row {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
  padding: 32px 0;
  border-bottom: 1px solid var(--border-soft);
}

.timeline__row:last-child {
  border-bottom: none;
}

.timeline__period {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--electric-cobalt);
}

.timeline__role {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: -0.02em;
}

.timeline__org {
  color: var(--muted-ice);
  font-size: 14px;
}

/* ===== BLOG CARDS ===== */
.post-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-soft);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: center;
}

.author-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.author-row__avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--charcoal);
  border: 1px solid var(--border-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-ice);
}

.divider {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: 48px 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--muted-ice);
  margin-bottom: 32px;
  transition: color 200ms ease-in-out;
}

.back-link:hover {
  color: var(--ice-white);
}

.author-box {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ===== ARTICLE ===== */
.prose-article {
  font-size: 17px;
  line-height: 1.75;
  color: var(--ice-white);
}

.prose-article h2 {
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 48px 0 16px;
}

.prose-article h3 {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 32px 0 12px;
}

.prose-article p {
  margin-bottom: 20px;
  opacity: 0.9;
}

.prose-article strong {
  font-weight: 500;
}

.prose-article ul,
.prose-article ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.prose-article li {
  margin-bottom: 8px;
  opacity: 0.9;
}

.prose-article blockquote {
  border-left: 3px solid var(--electric-cobalt);
  padding-left: 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--muted-ice);
}

.prose-article code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--charcoal);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--electric-cobalt);
}

.notice {
  padding: 24px;
  border-radius: 12px;
  background: var(--charcoal);
  border: 1px solid var(--border-soft);
  color: var(--muted-ice);
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--obsidian);
  border-top: 1px solid var(--border-soft);
  padding: 64px 0;
}

.social-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-row a {
  color: var(--ice-white);
  transition: color 200ms ease-in-out;
  display: inline-flex;
}

.social-row a:hover {
  color: var(--electric-cobalt);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}

.footer-bottom p:last-child {
  color: var(--muted-ice);
  font-size: 12px;
  line-height: 1.7;
  max-width: 512px;
}

/* ===== RESPONSIVE ===== */
@media (min-width: 640px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .author-box {
    flex-direction: row;
    align-items: flex-start;
  }
}

@media (min-width: 768px) {
  .container,
  .container-narrow {
    padding: 0 24px;
  }

  .section {
    padding: 128px 0;
  }

  .section--tight {
    padding: 64px 0;
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--split {
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
  }

  .grid--split-top {
    grid-template-columns: repeat(2, 1fr);
    align-items: start;
  }

  .timeline__row {
    grid-template-columns: 3fr 4fr 5fr;
    gap: 16px;
    align-items: center;
  }

  .featured-grid {
    grid-template-columns: 2fr 1fr;
    align-items: center;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  .footer-bottom p:last-child {
    text-align: right;
  }
}

@media (min-width: 1024px) {
  .container,
  .container-narrow {
    padding: 0 48px;
  }

  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .grid--about {
    grid-template-columns: 2fr 3fr;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .site-header__inner {
    height: auto;
    padding: 12px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    flex-wrap: wrap;
    gap: 14px;
  }

  main {
    padding-top: 120px;
  }

  .hero {
    min-height: auto;
  }
}