/* ==========================================================================
   Community — Together we grow
   Design tokens
   ========================================================================== */
:root {
  /* Colors */
  --color-bg: #0a0a0c;
  --color-bg-alt: #111114;
  --color-surface: #17171b;
  --color-surface-2: #1e1e23;
  --color-border: #2a2a30;

  --color-red-500: #e2001a;
  --color-red-400: #ff3347;
  --color-red-600: #b3001a;
  --color-red-glow: rgba(226, 0, 26, 0.45);

  --color-text: #f7f7f8;
  --color-text-muted: #a4a4ad;
  --color-text-faint: #6b6b74;

  --color-on-primary: #ffffff;

  /* Typography */
  --font-heading: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;

  /* Spacing scale (8px rhythm) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;
  --space-9: 128px;

  /* Layout */
  --container-max: 1180px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 180ms;
  --dur-base: 280ms;
  --dur-slow: 600ms;

  --header-height: 76px;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }

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

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4 { font-family: var(--font-heading); margin: 0; font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (max-width: 640px) {
  .container { padding-inline: var(--space-3); }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-red-500);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

:focus-visible {
  outline: 2px solid var(--color-red-400);
  outline-offset: 3px;
  border-radius: 4px;
}

.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; transition: transform var(--dur-fast) var(--ease-out); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-red-400), var(--color-red-500) 60%);
  color: #fff;
  box-shadow: 0 8px 24px -8px var(--color-red-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -6px var(--color-red-glow);
}
.btn-primary:hover svg { transform: translateX(3px); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.04);
}

.btn-sm { padding: 10px 20px; font-size: 0.85rem; }
.btn-lg { padding: 16px 32px; font-size: 1rem; }

@media (max-width: 640px) {
  .btn-lg { width: 100%; }
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-height);
  z-index: 100;
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled {
  background: rgba(10, 10, 12, 0.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 5px solid var(--color-red-500);
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: #fff;
}
.logo-reg { font-size: 0.5em; opacity: 0.6; }

.main-nav ul {
  display: flex;
  gap: var(--space-5);
}
.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding: 6px 0;
  transition: color var(--dur-fast) var(--ease-out);
}
.main-nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--color-red-500);
  transition: right var(--dur-base) var(--ease-out);
}
.main-nav a:hover { color: #fff; }
.main-nav a:hover::after { right: 0; }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0; right: 0;
  background: rgba(10, 10, 12, 0.98);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur-base) var(--ease-in-out);
  z-index: 99;
}
.mobile-nav.is-open { max-height: 420px; }
.mobile-nav ul {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  gap: var(--space-3);
}
.mobile-nav a { font-size: 1.05rem; font-weight: 500; color: var(--color-text); display: block; padding: var(--space-2) 0; }
.mobile-nav .btn { width: 100%; margin-top: var(--space-2); }

@media (max-width: 860px) {
  .main-nav { display: none; }
  .header-actions .btn-sm { display: none; }
  .nav-toggle { display: flex; }
}
@media (min-width: 861px) {
  .mobile-nav { display: none; }
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(ellipse 120% 80% at 50% -10%, #1a1013 0%, var(--color-bg) 60%);
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  animation: float 16s ease-in-out infinite;
}
.blob-1 {
  width: 620px; height: 620px;
  right: -180px; top: 8%;
  background: radial-gradient(circle at 30% 30%, var(--color-red-400), var(--color-red-600) 65%, transparent 100%);
}
.blob-2 {
  width: 420px; height: 420px;
  left: -140px; bottom: -10%;
  background: radial-gradient(circle at 60% 40%, var(--color-red-500), transparent 75%);
  animation-delay: -8s;
  opacity: 0.35;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 30px) scale(1.06); }
}

.ring-deco {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.08);
}
.ring-1 { width: 340px; height: 340px; right: 6%; top: 18%; }
.ring-2 { width: 180px; height: 180px; right: 14%; top: 30%; border-color: rgba(226,0,26,0.25); }

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 75%);
}

.hero-inner {
  padding-top: var(--space-7);
  padding-bottom: var(--space-8);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-red-400);
  background: rgba(226, 0, 26, 0.1);
  border: 1px solid rgba(226, 0, 26, 0.3);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}
.eyebrow-light {
  color: var(--color-text-muted);
  background: var(--color-surface);
  border-color: var(--color-border);
}
.eyebrow-light .pulse-dot { display: none; }

.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-red-400);
  box-shadow: 0 0 0 rgba(226,0,26,0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(226,0,26,0.55); }
  70% { box-shadow: 0 0 0 8px rgba(226,0,26,0); }
  100% { box-shadow: 0 0 0 0 rgba(226,0,26,0); }
}

.hero-title { margin-bottom: var(--space-4); }
.hero-title-main {
  display: block;
  font-size: clamp(3rem, 9vw, 6.5rem);
  line-height: 0.98;
  color: #fff;
}
.hero-title-sub {
  display: block;
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  letter-spacing: 0.01em;
}

.hero-desc {
  max-width: 560px;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  max-width: fit-content;
}
.meta-item { display: flex; align-items: center; gap: 12px; }
.meta-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: rgba(226,0,26,0.12);
  color: var(--color-red-400);
  flex-shrink: 0;
}
.meta-icon svg { width: 20px; height: 20px; }
.meta-label {
  display: block;
  font-size: 0.75rem;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.meta-value {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: #fff;
}
.meta-divider { width: 1px; height: 36px; background: var(--color-border); }

@media (max-width: 560px) {
  .hero-meta { flex-direction: column; align-items: flex-start; gap: var(--space-3); }
  .meta-divider { display: none; }
}

.hero-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

.scroll-cue {
  position: absolute;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-full);
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-cue span {
  width: 4px; height: 8px;
  background: var(--color-red-400);
  border-radius: var(--radius-full);
  animation: scrollcue 1.8s ease-in-out infinite;
}
@keyframes scrollcue {
  0% { opacity: 1; transform: translateY(0); }
  70% { opacity: 0; transform: translateY(12px); }
  100% { opacity: 0; transform: translateY(12px); }
}
@media (max-width: 640px) { .scroll-cue { display: none; } }

/* ==========================================================================
   Section shared
   ========================================================================== */
section:not(.hero):not(.cta-final) { padding-block: var(--space-8); }
@media (max-width: 640px) {
  section:not(.hero):not(.cta-final) { padding-block: var(--space-7); }
}

.section-heading { max-width: 620px; margin-bottom: var(--space-6); }
.section-heading h2 {
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  color: #fff;
  margin-block: var(--space-3);
}
.section-lead { color: var(--color-text-muted); font-size: 1.05rem; }

.about { background: var(--color-bg-alt); }

/* ==========================================================================
   Pillars grid
   ========================================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
@media (max-width: 980px) { .pillars-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pillars-grid { grid-template-columns: 1fr; } }

.pillar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-4);
  transition: transform var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
.pillar-card:hover {
  transform: translateY(-6px);
  border-color: rgba(226,0,26,0.4);
  background: var(--color-surface-2);
}
.pillar-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(226,0,26,0.12);
  color: var(--color-red-400);
  margin-bottom: var(--space-4);
}
.pillar-icon svg { width: 26px; height: 26px; }
.pillar-card h3 {
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: var(--space-2);
}
.pillar-card p { color: var(--color-text-muted); font-size: 0.95rem; }

/* ==========================================================================
   Speakers (coming soon)
   ========================================================================== */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
@media (max-width: 980px) { .speakers-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .speakers-grid { grid-template-columns: 1fr; } }

.speaker-placeholder {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
}
.speaker-avatar {
  width: 88px; height: 88px;
  border-radius: 50%;
  margin: 0 auto var(--space-3);
}
.speaker-line {
  height: 12px;
  border-radius: var(--radius-full);
  margin: var(--space-2) auto 0;
  width: 70%;
}
.speaker-line.short { width: 45%; }

.skeleton {
  background: linear-gradient(100deg, var(--color-surface-2) 30%, #2c2c33 50%, var(--color-surface-2) 70%);
  background-size: 200% 100%;
  animation: shimmer 2.2s ease-in-out infinite;
}
@keyframes shimmer {
  0% { background-position: 150% 0; }
  100% { background-position: -50% 0; }
}

.speakers-note {
  text-align: center;
  margin-top: var(--space-6);
  color: var(--color-text-faint);
  font-size: 0.95rem;
}

/* ==========================================================================
   Location
   ========================================================================== */
.location { background: var(--color-bg-alt); }
.location-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: center;
}
@media (max-width: 900px) {
  .location-grid { grid-template-columns: 1fr; gap: var(--space-5); }
}

.location-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: var(--space-5) 0;
}
.location-details li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text-muted);
  font-size: 1rem;
}
.location-details svg { width: 22px; height: 22px; color: var(--color-red-400); flex-shrink: 0; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-red-400);
  font-family: var(--font-heading);
  transition: gap var(--dur-fast) var(--ease-out);
}
.link-arrow svg { width: 18px; height: 18px; }
.link-arrow:hover { gap: 14px; }

.location-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 4 / 3;
  filter: grayscale(0.3) contrast(1.05);
}
.location-map iframe { width: 100%; height: 100%; border: 0; }

/* ==========================================================================
   Organizers
   ========================================================================== */
.organizers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
@media (max-width: 720px) { .organizers-grid { grid-template-columns: 1fr; } }

.org-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.org-card:hover { transform: translateY(-4px); border-color: rgba(226,0,26,0.35); }

.org-logo {
  width: 64px; height: 64px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: #fff;
  margin-bottom: var(--space-2);
  border: 2px solid var(--color-red-500);
}
.org-name { font-family: var(--font-heading); font-weight: 600; font-size: 1.1rem; color: #fff; }
.org-desc { font-size: 0.85rem; color: var(--color-text-faint); }

/* ==========================================================================
   Final CTA
   ========================================================================== */
.cta-final {
  position: relative;
  padding-block: var(--space-8);
  overflow: hidden;
  isolation: isolate;
}
.cta-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 100% at 50% 0%, var(--color-red-glow) 0%, transparent 60%),
    var(--color-bg);
}
.cta-inner {
  text-align: center;
  max-width: 640px;
}
.cta-final h2 {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  color: #fff;
  margin-bottom: var(--space-3);
}
.cta-final p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-5);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
}
.footer-brand p { color: var(--color-text-faint); font-size: 0.85rem; margin-top: 4px; }
.footer-nav { display: flex; gap: var(--space-4); flex-wrap: wrap; justify-content: center; }
.footer-nav a { color: var(--color-text-muted); font-size: 0.9rem; transition: color var(--dur-fast); }
.footer-nav a:hover { color: #fff; }
.footer-powered, .footer-copy { color: var(--color-text-faint); font-size: 0.8rem; }

/* ==========================================================================
   Scroll reveal animations
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
  transition-delay: calc(var(--reveal-delay, 0) * 90ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .blob, .pulse-dot, .scroll-cue span, .skeleton {
    animation: none !important;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}