/* ============================================
   VOLT - Berlin Techno Event
   Dark Neon Rave Landing Page Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --black: #000000;
  --surface: #0a0a0a;
  --surface-elevated: #111111;
  --surface-card: #0d0d0d;
  --cyan: #00FFFF;
  --cyan-dim: #00b8b8;
  --magenta: #FF00FF;
  --magenta-dim: #cc00cc;
  --purple: #1a0033;
  --purple-mid: #2d004d;
  --white: #ffffff;
  --gray: #888888;
  --gray-light: #aaaaaa;
  --gray-dark: #333333;

  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', monospace;

  --glow-cyan: 0 0 10px rgba(0, 255, 255, 0.3), 0 0 40px rgba(0, 255, 255, 0.1);
  --glow-cyan-strong: 0 0 10px rgba(0, 255, 255, 0.5), 0 0 40px rgba(0, 255, 255, 0.2), 0 0 80px rgba(0, 255, 255, 0.1);
  --glow-magenta: 0 0 10px rgba(255, 0, 255, 0.3), 0 0 40px rgba(255, 0, 255, 0.1);
  --glow-magenta-strong: 0 0 10px rgba(255, 0, 255, 0.5), 0 0 40px rgba(255, 0, 255, 0.2), 0 0 80px rgba(255, 0, 255, 0.1);

  --text-glow-cyan: 0 0 7px rgba(0, 255, 255, 0.6), 0 0 20px rgba(0, 255, 255, 0.3), 0 0 40px rgba(0, 255, 255, 0.15);
  --text-glow-magenta: 0 0 7px rgba(255, 0, 255, 0.6), 0 0 20px rgba(255, 0, 255, 0.3), 0 0 40px rgba(255, 0, 255, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 2rem;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 255, 255, 0.08);
  transition: background 0.3s ease;
}

.nav.scrolled {
  background: rgba(0, 0, 0, 0.95);
  border-bottom-color: rgba(0, 255, 255, 0.15);
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--cyan);
  text-shadow: var(--text-glow-cyan);
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-light);
  transition: color 0.3s ease, text-shadow 0.3s ease;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 6px rgba(0, 255, 255, 0.5);
  transition: width 0.3s ease;
}

.nav__link:hover {
  color: var(--cyan);
  text-shadow: var(--text-glow-cyan);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--cyan);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.35) saturate(0.8);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.2) 40%, rgba(0,0,0,0.4) 70%, rgba(0,0,0,0.95) 100%),
    radial-gradient(ellipse at 50% 30%, rgba(0,255,255,0.06) 0%, transparent 70%),
    radial-gradient(ellipse at 30% 70%, rgba(255,0,255,0.04) 0%, transparent 60%);
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
  max-width: 900px;
}

.hero__date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--magenta);
  text-shadow: var(--text-glow-magenta);
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeSlideUp 0.8s ease 0.3s forwards;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 15vw, 12rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  line-height: 0.9;
  color: var(--white);
  text-shadow:
    0 0 20px rgba(0, 255, 255, 0.4),
    0 0 60px rgba(0, 255, 255, 0.2),
    0 0 100px rgba(0, 255, 255, 0.1),
    0 0 150px rgba(255, 0, 255, 0.05);
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(30px) scale(0.95);
  animation: heroTitleIn 1s ease 0.1s forwards;
}

.hero__tagline {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-light);
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeSlideUp 0.8s ease 0.5s forwards;
}

.hero__cta {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 1rem 3rem;
  color: var(--black);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  box-shadow: var(--glow-cyan-strong);
  cursor: pointer;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeSlideUp 0.8s ease 0.7s forwards;
}

.hero__cta:hover {
  background: transparent;
  color: var(--cyan);
  box-shadow: var(--glow-cyan-strong), inset 0 0 30px rgba(0, 255, 255, 0.1);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: fadeIn 1s ease 1.2s forwards;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* --- Section Common --- */
.section {
  padding: 6rem 2rem;
  position: relative;
}

.section__header {
  text-align: center;
  margin-bottom: 4rem;
}

.section__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--magenta);
  text-shadow: var(--text-glow-magenta);
  margin-bottom: 1rem;
  display: block;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--white);
}

.section__divider {
  width: 60px;
  height: 2px;
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
  margin: 1.5rem auto 0;
}

/* --- Circuit Line Decorations (SVG-based) --- */
.circuit-line {
  position: absolute;
  pointer-events: none;
  opacity: 0.15;
}

.circuit-line--left {
  left: 0;
  top: 10%;
  width: 120px;
}

.circuit-line--right {
  right: 0;
  bottom: 10%;
  width: 120px;
}

/* --- Lineup Section --- */
.lineup {
  background: linear-gradient(180deg, var(--black) 0%, var(--purple) 50%, var(--black) 100%);
}

.lineup__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.dj-card {
  position: relative;
  background: var(--surface-card);
  border: 1px solid rgba(0, 255, 255, 0.1);
  padding: 0;
  overflow: hidden;
  transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.3s ease;
}

.dj-card:hover {
  border-color: rgba(0, 255, 255, 0.4);
  box-shadow: var(--glow-cyan);
  transform: translateY(-4px);
}

.dj-card:nth-child(2):hover {
  border-color: rgba(255, 0, 255, 0.4);
  box-shadow: var(--glow-magenta);
}

.dj-card:nth-child(4):hover {
  border-color: rgba(255, 0, 255, 0.4);
  box-shadow: var(--glow-magenta);
}

.dj-card__image {
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  position: relative;
}

.dj-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.4) brightness(0.6);
  transition: filter 0.4s ease, transform 0.4s ease;
}

.dj-card:hover .dj-card__image img {
  filter: grayscale(0) brightness(0.8);
  transform: scale(1.05);
}

.dj-card__image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.8) 0%, transparent 60%);
}

.dj-card__info {
  padding: 1.5rem;
  position: relative;
}

.dj-card__name {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
  margin-bottom: 0.5rem;
}

.dj-card:nth-child(2) .dj-card__name,
.dj-card:nth-child(4) .dj-card__name {
  color: var(--magenta);
  text-shadow: 0 0 10px rgba(255, 0, 255, 0.3);
}

.dj-card__genre {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray);
}

.dj-card__time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gray-light);
  margin-top: 0.5rem;
}

.dj-card__corner {
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: var(--cyan);
  opacity: 0.3;
  transition: opacity 0.3s ease;
}

.dj-card:hover .dj-card__corner {
  opacity: 0.7;
}

.dj-card__corner--tl {
  top: 0;
  left: 0;
  border-top: 1px solid;
  border-left: 1px solid;
}

.dj-card__corner--br {
  bottom: 0;
  right: 0;
  border-bottom: 1px solid;
  border-right: 1px solid;
}

.dj-card:nth-child(2) .dj-card__corner,
.dj-card:nth-child(4) .dj-card__corner {
  border-color: var(--magenta);
}

/* --- Tickets Section --- */
.tickets {
  background: var(--black);
  position: relative;
}

.tickets__info {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.tickets__venue {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
  margin-bottom: 0.5rem;
}

.tickets__date-display {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.tickets__location {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--gray);
  text-transform: uppercase;
}

.tickets__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}

.ticket-card {
  background: var(--surface-card);
  border: 1px solid var(--gray-dark);
  padding: 2.5rem 2rem;
  text-align: center;
  position: relative;
  transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.3s ease;
}

.ticket-card:hover {
  transform: translateY(-4px);
}

.ticket-card--standard {
  border-color: rgba(0, 255, 255, 0.3);
}

.ticket-card--standard:hover {
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.ticket-card--early:hover {
  border-color: rgba(0, 255, 255, 0.4);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.15);
}

.ticket-card--vip {
  border-color: rgba(255, 0, 255, 0.3);
}

.ticket-card--vip:hover {
  border-color: var(--magenta);
  box-shadow: var(--glow-magenta);
}

.ticket-card__featured {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  padding: 0.3rem 1rem;
  background: var(--cyan);
  color: var(--black);
  font-weight: 700;
}

.ticket-card--vip .ticket-card__featured {
  background: var(--magenta);
}

.ticket-card__tier {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
  margin-top: 0.5rem;
}

.ticket-card__price {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  margin-bottom: 0.25rem;
}

.ticket-card--standard .ticket-card__price {
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.ticket-card--vip .ticket-card__price {
  color: var(--magenta);
  text-shadow: 0 0 10px rgba(255, 0, 255, 0.3);
}

.ticket-card__currency {
  font-size: 1.2rem;
  font-weight: 400;
  vertical-align: super;
}

.ticket-card__features {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
}

.ticket-card__feature {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray-light);
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.ticket-card__feature:last-child {
  border-bottom: none;
}

.ticket-card__btn {
  display: inline-block;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.9rem 2rem;
  margin-top: 1rem;
  border: 1px solid var(--gray-dark);
  background: transparent;
  color: var(--white);
  cursor: pointer;
  transition: all 0.3s ease;
}

.ticket-card--early .ticket-card__btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.15);
}

.ticket-card--standard .ticket-card__btn {
  border-color: var(--cyan);
  color: var(--cyan);
}

.ticket-card--standard .ticket-card__btn:hover {
  background: var(--cyan);
  color: var(--black);
  box-shadow: var(--glow-cyan);
}

.ticket-card--vip .ticket-card__btn {
  border-color: var(--magenta);
  color: var(--magenta);
}

.ticket-card--vip .ticket-card__btn:hover {
  background: var(--magenta);
  color: var(--black);
  box-shadow: var(--glow-magenta);
}

/* --- Footer --- */
.footer {
  background: var(--surface);
  border-top: 1px solid rgba(0, 255, 255, 0.08);
  padding: 3rem 2rem;
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer__brand {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  color: var(--cyan);
  text-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
}

.footer__copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer__link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.3s ease;
}

.footer__link:hover {
  color: var(--cyan);
}

/* --- Animations --- */
@keyframes heroTitleIn {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes fadeSlideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

@keyframes scrollPulse {
  0%, 100% {
    opacity: 1;
    transform: scaleY(1);
  }
  50% {
    opacity: 0.3;
    transform: scaleY(0.6);
  }
}

/* Scroll-triggered animation classes */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Circuit SVG Decorative Elements --- */
.circuit-decoration {
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.circuit-decoration svg {
  width: 100%;
  height: 100%;
}

/* --- Neon Separator --- */
.neon-separator {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--magenta), transparent);
  box-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
  opacity: 0.4;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav {
    padding: 0 1.25rem;
  }

  .nav__links {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.97);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__hamburger {
    display: flex;
  }

  .hero__content {
    padding: 1.5rem;
  }

  .section {
    padding: 4rem 1.25rem;
  }

  .lineup__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .tickets__grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .dj-card__name {
    font-size: 1rem;
  }

  .dj-card__info {
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .lineup__grid {
    grid-template-columns: 1fr;
  }

  .hero__title {
    letter-spacing: 0.1em;
  }

  .nav__logo {
    font-size: 1.4rem;
  }
}

@media (min-width: 1400px) {
  .section {
    padding: 8rem 4rem;
  }
}