/* ============================================================
   Sense, Show, Act — ACM ISS 2026 Workshop
   Terminal-minimal theme: near-black base, amber accent,
   pixel-grid texture, VT323 / Press Start 2P display type.
   ============================================================ */

:root {
  --bg: #0a0a08;
  --bg-alt: #121309;
  --panel: #16170f;
  --panel-2: #1c1d13;
  --border: rgba(244, 240, 224, 0.12);
  --border-strong: rgba(244, 240, 224, 0.22);

  --fg: #f3f0e4;
  --fg-muted: #b8b4a4;
  --fg-faint: #83806f;

  --accent: #ffb238;
  --accent-soft: #7a5416;
  --accent-contrast: #0a0a08;
  --accent-contrast-muted: #3a2c0f;

  --font-display: 'VT323', ui-monospace, monospace;
  --font-pixel: 'Press Start 2P', ui-monospace, monospace;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;

  --wrap: 1120px;
  --radius: 3px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* pixel-grid + scanline texture, fixed behind content */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(244, 240, 224, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 240, 224, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), rgba(0,0,0,0.35) 60%, transparent 100%);
}

img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
code { font-family: var(--font-display); }

.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;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  font-weight: 700;
  z-index: 100;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---------- Eyebrow / labels ---------- */
.eyebrow {
  font-family: var(--font-pixel);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.eyebrow-invert { color: var(--accent-contrast); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 8, 0.86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0 5px;
  font-family: var(--font-pixel);
  font-size: clamp(8px, 2.4vw, 10px);
  letter-spacing: 0.02em;
  color: var(--fg);
  white-space: nowrap;
  flex: none;
}
.wordmark-px { color: var(--accent); }
.wordmark-dot { color: var(--fg-faint); margin-left: -3px; }

.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14.5px;
  font-weight: 500;
}

.primary-nav a { color: var(--fg-muted); transition: color 0.15s ease; }
.primary-nav a:hover, .primary-nav a:focus-visible { color: var(--fg); }

.nav-cta {
  color: var(--accent-contrast) !important;
  background: var(--accent);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 700;
}
.nav-cta:hover, .nav-cta:focus-visible {
  background: #ffc25c;
  color: var(--accent-contrast) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.nav-toggle-bar {
  width: 18px; height: 2px;
  background: var(--fg);
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn-primary:hover, .btn-primary:focus-visible { background: #ffc25c; }

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--fg);
}
.btn-ghost:hover, .btn-ghost:focus-visible { border-color: var(--accent); color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--border);
}

.hero-photo {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 90% 70% at 100% 100%, black 0%, black 35%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 100% 100%, black 0%, black 35%, transparent 72%);
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: 100% 100%;
  filter: grayscale(0.2) sepia(0.45) saturate(2) hue-rotate(-14deg) brightness(0.8) contrast(1.1);
  opacity: 0.45;
}

@media (min-width: 860px) {
  .hero-photo {
    mask-image: linear-gradient(100deg, transparent 0%, transparent 18%, rgba(0, 0, 0, 0.55) 42%, black 62%);
    -webkit-mask-image: linear-gradient(100deg, transparent 0%, transparent 18%, rgba(0, 0, 0, 0.55) 42%, black 62%);
  }
  .hero-photo img {
    object-position: 88% 48%;
    opacity: 0.5;
  }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(56px, 11vw, 116px);
  line-height: 0.98;
  color: var(--fg);
  margin: 0 0 18px;
  letter-spacing: 0.01em;
}

.hero-subtitle {
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 500;
  color: var(--fg-muted);
  max-width: 46ch;
  margin-bottom: 22px;
}

.hero-meta {
  font-size: 14.5px;
  color: var(--fg-faint);
  margin-bottom: 40px;
}

.placeholder-inline {
  display: inline-block;
  color: var(--accent);
  border: 1px dashed var(--accent-soft);
  padding: 1px 6px;
  border-radius: var(--radius);
  overflow-wrap: anywhere;
  word-break: break-word;
  max-width: 100%;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- Section shell ---------- */
.section {
  padding: 88px 0;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(36px, 5.5vw, 54px);
  line-height: 1.05;
  margin-bottom: 24px;
}

.lede {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 68ch;
  margin-bottom: 40px;
}
.lede-tight { margin-top: 40px; margin-bottom: 0; max-width: 62ch; }
.lede em { color: var(--fg); font-style: normal; font-weight: 600; }

/* ---------- Loop graphic ---------- */
.loop-block {
  display: grid;
  grid-template-columns: minmax(280px, 460px) 1fr;
  gap: 48px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}

.loop-graphic img { width: 100%; height: auto; display: block; }

.loop-legend { display: flex; flex-direction: column; gap: 20px; }
.loop-legend li {
  font-size: 15.5px;
  color: var(--fg-muted);
  line-height: 1.55;
  padding-left: 16px;
  border-left: 2px solid var(--accent-soft);
}
.loop-key {
  display: block;
  font-family: var(--font-pixel);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 6px;
}

/* ---------- Topic chips ---------- */
.topic-chips { margin-top: 32px; }
.topic-chips-label {
  font-size: 13.5px;
  color: var(--fg-faint);
  margin-bottom: 12px;
}
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip-list li {
  font-size: 13.5px;
  color: var(--fg-muted);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 6px 12px;
}

/* ---------- Prototype figure ---------- */
.prototype-figure {
  margin: 48px 0 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  max-width: 720px;
}
.prototype-figure img { width: 100%; height: auto; }
.prototype-figure figcaption {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--fg-faint);
  border-top: 1px solid var(--border);
}

/* ---------- Goals ---------- */
.goals { margin-top: 56px; }
.goals-title {
  font-family: var(--font-pixel);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 22px;
}
.goals-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.goals-list li {
  counter-increment: goal;
  position: relative;
  padding: 20px 20px 20px 54px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15.5px;
  color: var(--fg);
}
.goals-list { counter-reset: goal; }
.goals-list li::before {
  content: counter(goal);
  position: absolute;
  left: 18px; top: 18px;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}

/* ---------- CfP (focal, inverted) ---------- */
.cfp {
  background: var(--accent);
  color: var(--accent-contrast);
  border-bottom: 1px solid var(--accent-soft);
  position: relative;
}
.cfp::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(10,10,8,0.05) 0,
    rgba(10,10,8,0.05) 1px,
    transparent 1px,
    transparent 4px
  );
  pointer-events: none;
}

.cfp-title { color: var(--accent-contrast); }
.cfp-lede { color: var(--accent-contrast-muted); max-width: 62ch; }

.cfp-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 40px;
}
.cfp-card {
  background: rgba(10, 10, 8, 0.08);
  border: 1.5px solid rgba(10, 10, 8, 0.35);
  border-radius: var(--radius);
  padding: 22px;
}
.cfp-card-kicker {
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-contrast-muted);
  margin-bottom: 12px;
}


.cfp-card h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 10px;
}
.cfp-card p { font-size: 15px; color: var(--accent-contrast-muted); }

p.cfp-card-kicker {
  font-size: 10px;
}


.cfp-submit {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  background: rgba(10,10,8,0.08);
  border: 1.5px solid rgba(10,10,8,0.35);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 32px;
}
.cfp-submit-label {
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-contrast-muted);
  margin-bottom: 6px;
}
.cfp-submit-text p:last-child { font-weight: 600; }

.email-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg);
  color: var(--fg);
  border: 1px dashed var(--fg-faint);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 16px;
  margin-left: auto;
  transition: border-color 0.15s ease;
}
.email-chip:hover, .email-chip:focus-visible { border-color: var(--accent); }
.email-chip code { color: var(--accent); font-size: 18px; }
.email-chip-action {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fg-faint);
  border-left: 1px solid var(--border);
  padding-left: 12px;
}

.cfp-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}
.deadline-badge {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  border-radius: var(--radius);
  padding: 14px 22px;
  flex: none;
}
.deadline-badge-label {
  font-family: var(--font-pixel);
  font-size: 9.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.deadline-badge-date {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1;
}
.cfp-note {
  font-size: 14px;
  color: var(--accent-contrast-muted);
  max-width: 46ch;
}

/* ---------- Dates / Timeline ---------- */
.timeline {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}
.timeline-item {
  display: flex;
  align-items: baseline;
  gap: 28px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--border);
}
.timeline-date {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--fg-muted);
  width: 150px;
  flex: none;
}
.timeline-milestone {
  font-size: 16px;
  color: var(--fg);
}
.timeline-item-highlight {
  background: var(--panel);
  border-left: 3px solid var(--accent);
  border-bottom-color: var(--border-strong);
  padding-left: 18px;
  margin: -1px -18px;
}
.timeline-item-highlight .timeline-date { color: var(--accent); font-size: 26px; }
.timeline-item-highlight .timeline-milestone { font-weight: 700; }

/* ---------- Format strip ---------- */
.format-strip {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}
.format-strip-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.format-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  color: var(--fg-muted);
}
.format-icon {
  color: var(--accent);
  font-size: 14px;
  flex: none;
}

/* ---------- Organizers ---------- */
.organizer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.organizer-card {
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-top: 2px solid var(--accent-soft);
}
.organizer-name { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.organizer-affil { font-size: 13.5px; color: var(--fg-faint); }

/* ---------- Footer ---------- */
.site-footer { padding: 48px 0; }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
}
.footer-title {
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--fg);
}
.footer-sub { font-size: 13.5px; color: var(--fg-faint); margin-top: 4px; }
.footer-contact { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; text-align: right; }
.footer-contact a { font-size: 14px; color: var(--fg-muted); }
.footer-contact a:hover, .footer-contact a:focus-visible { color: var(--accent); }

.footer-legal { font-size: 13px; color: var(--fg-faint); margin-top: 10px; }
.footer-legal a { color: var(--fg-faint); text-decoration: underline; text-underline-offset: 3px; }
.footer-legal a:hover, .footer-legal a:focus-visible { color: var(--accent); }

/* ---------- Legal page (Impressum / Privacy) ---------- */
.legal-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--border);
}
.legal-back {
  display: inline-block;
  font-size: 13.5px;
  color: var(--fg-faint);
  margin-bottom: 20px;
}
.legal-back:hover, .legal-back:focus-visible { color: var(--accent); }

.legal-jump {
  display: flex;
  gap: 20px;
  margin-top: 24px;
}
.legal-jump a {
  font-size: 14px;
  color: var(--fg-muted);
  border-bottom: 1px solid var(--border-strong);
}
.legal-jump a:hover, .legal-jump a:focus-visible { color: var(--accent); border-color: var(--accent); }

.legal-lang { border-top: 3px solid var(--accent-soft); }
.legal-lang > .wrap { padding-top: 48px; padding-bottom: 8px; }
.legal-lang-tag {
  font-family: var(--font-display);
  font-size: 32px;
  color: var(--accent);
  margin-bottom: 4px;
}
.legal-jump-sub { margin-top: 12px; gap: 16px; }
.legal-jump-sub a { font-size: 13px; }

.legal-section { padding: 40px 0 56px; border-bottom: 1px solid var(--border); }
.legal-content { max-width: 68ch; }
.legal-content h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 26px;
  color: var(--fg);
  margin: 40px 0 10px;
}
.legal-content h3:first-child { margin-top: 0; }
.legal-content p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--fg-muted);
  margin-bottom: 14px;
}
.legal-content address { font-style: normal; }
.legal-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.legal-content strong { color: var(--fg); font-weight: 600; }
.legal-content ul { list-style: disc; padding-left: 22px; margin-bottom: 14px; }
.legal-content li { font-size: 15px; line-height: 1.7; color: var(--fg-muted); margin-bottom: 6px; }
.legal-note {
  font-size: 13.5px;
  color: var(--fg-faint);
  border-left: 2px solid var(--accent-soft);
  padding-left: 14px;
  margin: 24px 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .loop-block { grid-template-columns: 1fr; }
  .goals-list { grid-template-columns: 1fr; }
  .cfp-cards { grid-template-columns: 1fr; }
  .organizer-grid { grid-template-columns: repeat(2, 1fr); }
  .format-strip-inner { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .primary-nav {
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 20px;
    display: none;
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .primary-nav a:last-child { border-bottom: none; }
  .nav-cta { text-align: center; margin-top: 12px; }
  .nav-toggle { display: flex; }

  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }

  .email-chip { margin-left: 0; width: 100%; }
  .email-chip code { word-break: break-all; }
  .cfp-submit { flex-direction: column; align-items: stretch; }

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

  .timeline-item { flex-direction: column; gap: 4px; }
  .timeline-date { width: auto; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-contact { align-items: flex-start; text-align: left; }
}