/* ============================================================
   FDE Conference III — matches the Nixo / FDE Score design system
   ground #070709 · surface #111114 · line #27262c / #1c1b21
   ink #f5f4f6 · muted #9996a0 · magenta #9c145d / #c41a76 (Nixo pink)
   Geist Sans + Geist Mono, semibold max, tight tracking
   ============================================================ */

:root {
  --ground: #070709;
  --surface: #111114;
  --line: #27262c;
  --line-soft: #1c1b21;
  --ink: #f5f4f6;
  --muted: #9996a0;
  --magenta: #9c145d;
  --magenta-bright: #c41a76;

  --font-sans: "Geist", system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, monospace;

  --max: 72rem;
  --pad: clamp(1.5rem, 5vw, 3rem);
  --radius: 0.5rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.625;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--magenta); color: var(--ink); }

a { color: var(--ink); text-decoration: none; }
a:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--magenta-bright);
  outline-offset: 3px;
  border-radius: 2px;
}

h1, h2, h3 { font-weight: 600; }

h2 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 1.1rem 0 2.75rem;
}

/* ---------- shared ---------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow-accent { color: var(--magenta-bright); }

.accent-glow {
  color: var(--magenta-bright);
  text-shadow: 0 0 48px rgba(196, 26, 118, 0.35);
}

.section { border-top: 1px solid var(--line-soft); }
.section-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(5rem, 9vw, 9rem) var(--pad);
}

.section-note {
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  padding: 0.65em 1.5em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background-color 0.15s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.15s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-primary {
  background: var(--magenta-bright);
  color: var(--ink);
}
.btn-primary:hover { background: var(--magenta); }
.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--magenta-bright); color: var(--magenta-bright); }
.btn-sm { padding: 0.45em 1.1em; font-size: 0.875rem; }

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem var(--pad);
  background: rgba(7, 7, 9, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-soft);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.wordmark-logo {
  width: 2.5rem;
  height: 2.5rem;
}
.wordmark-name {
  font-size: 1.625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2rem);
}
.nav-links a:not(.btn) {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-links a:not(.btn):hover { color: var(--ink); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  min-height: calc(100svh - 4.5rem);
  display: flex;
  align-items: center;
}
.gradient-waves {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(7, 7, 9, 0) 62%, var(--ground) 100%),
    radial-gradient(ellipse 52% 46% at 50% 44%, rgba(7, 7, 9, 0.6) 0%, rgba(7, 7, 9, 0.25) 50%, rgba(7, 7, 9, 0) 75%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(4rem, 8vw, 7rem) var(--pad);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-title {
  margin-top: 2.25rem;
  font-size: clamp(2.6rem, 8vw, 7rem);
  line-height: 1;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.hero-sub {
  margin-top: 2.25rem;
  max-width: 42rem;
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  line-height: 1.625;
  color: var(--muted);
  text-wrap: balance;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2.5rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 0;
  margin-top: 4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero-meta span { padding: 0 1.25rem; }
.hero-meta span + span { border-left: 1px solid var(--line); }

/* ---------- about / split layout ---------- */

.split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
.lead {
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  line-height: 1.45;
  letter-spacing: -0.015em;
  font-weight: 500;
  text-wrap: balance;
}
.split-body { color: var(--muted); }
.split-body p + p { margin-top: 1.1em; }

/* ---------- speakers ---------- */

.speakers {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.card {
  background: var(--ground);
  padding: 1.75rem;
  transition: background-color 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}
.card:hover { background: var(--surface); }
.card-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--magenta-bright);
  margin-bottom: 1.1rem;
}
.card h3 {
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: -0.025em;
}
.card-role {
  margin-top: 0.2rem;
  font-size: 0.875rem;
  color: var(--muted);
}
.card-talk {
  margin-top: 0.9rem;
  font-size: 0.9375rem;
  color: var(--ink);
}
.card-talk::before { content: "“"; color: var(--magenta-bright); }
.card-talk::after { content: "”"; color: var(--magenta-bright); }

/* ---------- agenda ---------- */

.agenda { list-style: none; }
.agenda-row {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: clamp(1rem, 3vw, 2.5rem);
  padding: 1.5rem 0;
  border-top: 1px solid var(--line-soft);
}
.agenda-row:last-child { border-bottom: 1px solid var(--line-soft); }
.agenda-time {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--magenta-bright);
  padding-top: 0.3rem;
}
.agenda-row h3 {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.agenda-row p {
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.9375rem;
  max-width: 46rem;
}

/* ---------- venue meta ---------- */

.meta-list { display: grid; gap: 0; }
.meta-list > div {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line-soft);
}
.meta-list > div:last-child { border-bottom: 1px solid var(--line-soft); }
.meta-list dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.25rem;
}
.meta-list dd { font-size: 0.9375rem; }

/* ---------- register ---------- */

.section-register {
  position: relative;
  overflow: hidden;
}
.section-register::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 50% 60% at 50% 100%, rgba(196, 26, 118, 0.1) 0%, rgba(196, 26, 118, 0) 70%);
}
.register-inner {
  position: relative;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.register-title {
  font-size: clamp(2.75rem, 7vw, 5.75rem);
  letter-spacing: -0.04em;
  line-height: 1.02;
  margin-bottom: 1.75rem;
}
.register-sub {
  max-width: 38rem;
  color: var(--muted);
  text-wrap: balance;
}
.register-inner .hero-actions { margin-top: 2.25rem; }

/* ---------- footer ---------- */

.footer { border-top: 1px solid var(--line-soft); }
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3rem var(--pad);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-line {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- animation ---------- */

.anim {
  opacity: 0;
  transform: translateY(18px);
}
.anim.in {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */

@media (max-width: 820px) {
  .split { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
  .agenda-row { grid-template-columns: 4.5rem 1fr; }
  .hero-meta span { padding: 0 0.9rem; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .anim, .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .card, .btn, .nav-links a { transition: none; }
}