/* ============================================
   OPEN SOURCE WEEK — Style
   Dark, monospace, film-grain, A/V tech vibe
   ============================================ */

:root {
  --black: #0a0a0a;
  --dark: #111111;
  --dark2: #1a1a1a;
  --gray: #2a2a2a;
  --mid: #666666;
  --light: #b0b0b0;
  --white: #f0f0f0;
  --accent: #00ff88;
  --accent2: #00ccff;
  --mono: 'JetBrains Mono', 'Courier New', monospace;
  --sans: 'Inter', -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--black);
  color: var(--light);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--accent2);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ---- BLINK CURSOR ---- */
.blink {
  animation: blink 1s step-end infinite;
}
@keyframes blink {
  50% { opacity: 0; }
}

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray);
}

.nav__logo {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.nav__links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav__links a {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color 0.2s;
}
.nav__links a:hover {
  color: var(--accent);
}

.nav__cta {
  background: var(--accent);
  color: var(--black) !important;
  padding: 0.5rem 1rem;
  border-radius: 2px;
  font-weight: 500;
}
.nav__cta:hover {
  background: var(--accent2);
  color: var(--black) !important;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: 0.3s;
}

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--black);
  overflow: hidden;
}

.hero__grain {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px;
  pointer-events: none;
}

.hero__scanline {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 2rem;
}

.hero__tag {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1.5rem;
}

.hero__title {
  font-family: var(--mono);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero__sub {
  max-width: 600px;
  margin: 0 auto 2.5rem;
  font-size: 1.1rem;
  color: var(--mid);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.85rem 2rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.btn--primary {
  background: var(--accent);
  color: var(--black);
  border-color: var(--accent);
}
.btn--primary:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  color: var(--black);
}

.btn--ghost {
  background: transparent;
  color: var(--light);
  border-color: var(--gray);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- SECTIONS ---- */
.section {
  padding: 6rem 0;
}
.section--dark {
  background: var(--dark);
}

.section__label {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 2rem;
}

.section__intro {
  font-size: 1.1rem;
  color: var(--mid);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* ---- ABOUT ---- */
.about__grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about__text h3 {
  font-family: var(--mono);
  font-size: 1.6rem;
  color: var(--white);
  margin-bottom: 1.5rem;
  line-height: 1.3;
}

.about__text p {
  margin-bottom: 1rem;
  color: var(--light);
}

.about__stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.stat {
  border-left: 2px solid var(--accent);
  padding-left: 1.5rem;
}

.stat__number {
  display: block;
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--white);
}

.stat__label {
  font-size: 0.85rem;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---- TRACKS / PROGRAMMING ---- */
.tracks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.track {
  background: var(--dark2);
  border: 1px solid var(--gray);
  padding: 2rem;
  transition: border-color 0.2s;
}
.track:hover {
  border-color: var(--accent);
}

.track__icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.track__title {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.75rem;
}

.track p {
  font-size: 0.9rem;
  color: var(--mid);
}

/* ---- SPEAKERS / ANNOUNCING ---- */
.announcing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.announcing__box {
  padding: 2.5rem;
  border: 1px solid var(--gray);
  background: var(--dark);
}

.announcing__text {
  font-family: var(--mono);
  font-size: 1.4rem;
  color: var(--white);
  margin-bottom: 1rem;
}

.announcing__box p {
  color: var(--mid);
  margin-bottom: 1.5rem;
}

.announcing__placeholders {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.placeholder-card {
  aspect-ratio: 1;
  background: var(--dark);
  border: 1px dashed var(--gray);
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-card span {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ---- VENUE ---- */
.venue__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.venue__info h3 {
  font-family: var(--mono);
  font-size: 1.6rem;
  color: var(--white);
  margin-bottom: 1rem;
}

.venue__info p {
  color: var(--mid);
  margin-bottom: 1.5rem;
}

.venue__details {
  list-style: none;
}

.venue__details li {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--light);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray);
}

.venue__details li strong {
  color: var(--accent);
}

.venue__map-placeholder {
  aspect-ratio: 1;
  background: var(--dark2);
  border: 1px solid var(--gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 4rem;
  font-weight: 700;
  color: var(--gray);
}

/* ---- GET INVOLVED ---- */
.involved__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.involved__card {
  padding: 2rem;
  border: 1px solid var(--gray);
  background: var(--dark);
  transition: border-color 0.2s;
}
.involved__card:hover {
  border-color: var(--accent);
}

.involved__card h3 {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 0.75rem;
}

.involved__card p {
  font-size: 0.9rem;
  color: var(--mid);
  margin-bottom: 1.5rem;
}

/* ---- FOOTER ---- */
.footer {
  border-top: 1px solid var(--gray);
  padding-top: 3rem;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: start;
  padding-bottom: 2rem;
}

.footer__brand p {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--mid);
}

.footer__contact a {
  font-family: var(--mono);
  font-size: 0.85rem;
}

.footer__bottom {
  border-top: 1px solid var(--gray);
  padding: 1.5rem 2rem;
  text-align: center;
}

.footer__bottom p {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--mid);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--dark);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    padding: 2rem;
    transition: right 0.3s;
    border-left: 1px solid var(--gray);
  }
  .nav__links--open {
    right: 0;
  }
  .nav__toggle {
    display: flex;
  }
  .nav__toggle--active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav__toggle--active span:nth-child(2) {
    opacity: 0;
  }
  .nav__toggle--active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .about__grid,
  .announcing,
  .venue__grid,
  .involved__grid,
  .tracks {
    grid-template-columns: 1fr;
  }

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

  .hero__title {
    font-size: clamp(2.5rem, 12vw, 5rem);
  }

  .section {
    padding: 4rem 0;
  }

  .footer__inner {
    flex-direction: column;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .announcing__placeholders {
    grid-template-columns: repeat(2, 1fr);
  }
}