/* humanoids2015 — Conference Stage */

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=Anton&family=Barlow+Condensed:wght@400;600;700&family=Space+Grotesk:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* Tokens */
:root {
  --canvas: #0A0A0F;
  --ink: #F0EDE8;
  --accent: #FF6B35;
  --muted: #6B6B7B;
  --card-bg: #14141F;
  --divider: #2A2A3A;
  --content-width: 800px;
  --gutter: clamp(20px, 4vw, 48px);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--canvas);
}

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

a:hover {
  opacity: 0.8;
}

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

/* ------------------------------------------------
   Header
   ------------------------------------------------ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  mix-blend-mode: difference;
}

.wordmark {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.wordmark span {
  font-weight: 400;
  color: var(--muted);
}

.header-nav {
  display: flex;
  gap: 24px;
}

.header-nav a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.header-nav a:hover {
  color: var(--ink);
  opacity: 1;
}

/* ------------------------------------------------
   Hero
   ------------------------------------------------ */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  background: var(--canvas);
}

/* Robot portrait grid — staggered diagonal */
.robot-grid {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  display: flex;
  gap: 16px;
  padding: 0 var(--gutter);
  z-index: 2;
}

.robot-card {
  width: clamp(140px, 14vw, 200px);
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.robot-card:nth-child(even) {
  transform: translateY(40px);
}

.robot-card:nth-child(odd) {
  transform: translateY(-20px);
}

.robot-card:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 20px 60px rgba(255, 107, 53, 0.15);
}

.robot-card:nth-child(even):hover {
  transform: translateY(32px) scale(1.03);
  box-shadow: 0 20px 60px rgba(255, 107, 53, 0.15);
}

.robot-card img {
  width: 100%;
  height: auto;
  display: block;
}

/* Fade edges of robot grid */
.robot-grid::before,
.robot-grid::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 3;
  pointer-events: none;
}

.robot-grid::before {
  left: 0;
  background: linear-gradient(to right, var(--canvas), transparent);
}

.robot-grid::after {
  right: 0;
  background: linear-gradient(to left, var(--canvas), transparent);
}

/* Scrolling marquee */
.marquee-wrap {
  position: relative;
  z-index: 5;
  overflow: hidden;
  padding-bottom: clamp(40px, 6vh, 80px);
  /* slight overlap into robot grid */
  margin-top: -20px;
}

.marquee {
  display: flex;
  width: max-content;
  animation: marquee-scroll 60s linear infinite;
}

.marquee-text {
  font-family: 'Anton', sans-serif;
  font-weight: 400;
  font-size: clamp(80px, 14vw, 220px);
  line-height: 1;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
  padding-right: 0.15em;
  user-select: none;
}

.marquee-dot {
  color: var(--accent);
  padding: 0 0.1em;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Subtle gradient overlay at bottom of hero for transition */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--canvas));
  z-index: 6;
  pointer-events: none;
}

/* ------------------------------------------------
   Content sections
   ------------------------------------------------ */

.content-section {
  padding: clamp(60px, 8vh, 120px) var(--gutter);
}

.content-inner {
  max-width: var(--content-width);
  margin: 0 auto;
}

/* Article on homepage */
.article-block {
  padding: clamp(60px, 8vh, 100px) 0;
  border-bottom: 1px solid var(--divider);
}

.article-block:last-child {
  border-bottom: none;
}

.article-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.article-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 32px;
}

.article-title a {
  color: var(--ink);
}

.article-title a:hover {
  color: var(--accent);
  opacity: 1;
}

.article-body h2 {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 600;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-top: 48px;
  margin-bottom: 20px;
}

.article-body p {
  margin-bottom: 20px;
  color: var(--ink);
  opacity: 0.92;
}

.article-body p:last-child {
  margin-bottom: 0;
}

/* Cross-references at end of article */
.cross-refs {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--divider);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
}

.cross-refs a {
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
}

/* ------------------------------------------------
   Article page (standalone)
   ------------------------------------------------ */

.article-page {
  padding-top: 120px;
}

.article-page .article-title {
  font-size: clamp(32px, 5vw, 56px);
}

/* ------------------------------------------------
   About page
   ------------------------------------------------ */

.about-page {
  padding-top: 120px;
}

.about-page h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: clamp(32px, 5vw, 56px);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
}

.about-page p {
  margin-bottom: 20px;
  opacity: 0.92;
}

/* ------------------------------------------------
   Blog index
   ------------------------------------------------ */

.blog-index {
  padding-top: 120px;
}

.blog-index h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: clamp(32px, 5vw, 56px);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.blog-list {
  list-style: none;
}

.blog-list li {
  padding: 24px 0;
  border-bottom: 1px solid var(--divider);
}

.blog-list li:first-child {
  border-top: 1px solid var(--divider);
}

.blog-list a {
  display: block;
}

.blog-list .post-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 24px;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 4px;
}

.blog-list a:hover .post-title {
  color: var(--accent);
}

.blog-list .post-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
}

/* ------------------------------------------------
   404
   ------------------------------------------------ */

.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.error-page h1 {
  font-family: 'Anton', sans-serif;
  font-size: clamp(80px, 15vw, 200px);
  line-height: 1;
  color: var(--divider);
}

.error-page p {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: var(--muted);
  margin-top: 16px;
}

.error-page a {
  color: var(--accent);
}

/* ------------------------------------------------
   Footer
   ------------------------------------------------ */

.site-footer {
  padding: 48px var(--gutter);
  border-top: 1px solid var(--divider);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-wordmark {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.footer-wordmark span {
  font-weight: 400;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  gap: 24px;
}

.footer-nav a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--muted);
}

.footer-nav a:hover {
  color: var(--ink);
  opacity: 1;
}

.footer-copy {
  width: 100%;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
}

/* ------------------------------------------------
   Responsive
   ------------------------------------------------ */

@media (max-width: 768px) {
  .site-header {
    padding: 16px var(--gutter);
  }

  .header-nav {
    display: none;
  }

  .robot-grid {
    gap: 10px;
  }

  .robot-card {
    width: clamp(100px, 22vw, 150px);
  }

  .robot-card:nth-child(5),
  .robot-card:nth-child(6) {
    display: none;
  }

  .marquee-text {
    font-size: clamp(60px, 16vw, 120px);
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .robot-card:nth-child(4) {
    display: none;
  }
}