/* ========================================
   uzsetochysta.cz – Design System
   ======================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --color-bg: #0a0a0a;
  --color-bg-elevated: #141414;
  --color-bg-card: #1a1a1a;
  --color-surface: #222222;
  --color-text-primary: #f5f5f5;
  --color-text-secondary: #a0a0a0;
  --color-text-muted: #666666;
  --color-accent: #e52222;
  --color-accent-hover: #ff3333;
  --color-accent-glow: rgba(229, 34, 34, 0.35);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-glass: rgba(255, 255, 255, 0.04);
  --color-glass-border: rgba(255, 255, 255, 0.1);

  /* Typography */
  --font-display: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 200ms;
  --duration-normal: 350ms;
  --duration-slow: 600ms;
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

/* ---------- Background Effects ---------- */
.bg-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  pointer-events: none;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.bg-glow::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
  filter: blur(100px);
  animation: pulse-glow 6s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
  from { opacity: 0.3; transform: translateX(-50%) scale(0.9); }
  to { opacity: 0.6; transform: translateX(-50%) scale(1.1); }
}

/* ---------- Layout ---------- */
.container {
  width: min(1100px, 100% - 2rem);
  margin-inline: auto;
}

/* ---------- Hero Section ---------- */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  position: relative;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 7rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-transform: uppercase;
  background: linear-gradient(135deg, #ffffff 0%, #e0e0e0 50%, #ffffff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  animation: title-appear 1s var(--ease-out) both;
}

.hero-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--color-accent);
  margin: var(--space-lg) auto 0;
  border-radius: 2px;
  animation: line-expand 0.8s var(--ease-out) 0.5s both;
}

@keyframes title-appear {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    filter: blur(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes line-expand {
  from { width: 0; opacity: 0; }
  to { width: 80px; opacity: 1; }
}

/* ---------- Logo & Event Info ---------- */
.event-info {
  margin-top: var(--space-3xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  animation: fade-up 0.8s var(--ease-out) 0.3s both;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.event-logo {
  width: min(420px, 80vw);
  filter: drop-shadow(0 0 30px rgba(229, 34, 34, 0.15));
  transition: filter var(--duration-normal) var(--ease-out);
}

.event-logo:hover {
  filter: drop-shadow(0 0 50px rgba(229, 34, 34, 0.3));
}

.event-details {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.event-date {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.event-location {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--color-text-secondary);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ---------- Countdown Badge ---------- */
.countdown-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-glass);
  border: 1px solid var(--color-glass-border);
  border-radius: 999px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-top: var(--space-md);
  animation: fade-up 0.8s var(--ease-out) 0.6s both;
}

.countdown-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ---------- Section Shared ---------- */
.section {
  padding: var(--space-4xl) var(--space-md);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3xl);
  position: relative;
}

.section-title span {
  color: var(--color-accent);
}

/* ---------- Schedule / Lineup ---------- */
.lineup {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.lineup-days {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.day-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-normal) var(--ease-out);
}

.day-card:hover {
  border-color: rgba(229, 34, 34, 0.25);
}

.day-header {
  padding: var(--space-lg) var(--space-xl);
  background: linear-gradient(135deg, rgba(229, 34, 34, 0.12) 0%, transparent 100%);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.day-name {
  font-size: 1.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.day-date {
  font-size: 0.95rem;
  color: var(--color-accent);
  font-weight: 600;
}

.day-acts {
  list-style: none;
  padding: var(--space-sm) 0;
}

.act {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--duration-fast) ease;
}

.act:last-child {
  border-bottom: none;
}

.act:hover {
  background: var(--color-glass);
}

.act-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.act-name.highlight {
  color: var(--color-accent);
  font-size: 1.15rem;
}

.act-time {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------- CTA Banner ---------- */
.cta-section {
  padding: var(--space-4xl) var(--space-md);
  text-align: center;
}

.cta-card {
  max-width: 700px;
  margin: 0 auto;
  padding: var(--space-3xl) var(--space-2xl);
  background: linear-gradient(135deg, rgba(229, 34, 34, 0.08) 0%, rgba(229, 34, 34, 0.02) 100%);
  border: 1px solid rgba(229, 34, 34, 0.2);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 30%, rgba(229, 34, 34, 0.06), transparent 60%);
  pointer-events: none;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
  position: relative;
}

.cta-subtitle {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: var(--space-xl);
  position: relative;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-2xl);
  background: var(--color-accent);
  color: white;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition:
    background var(--duration-fast) ease,
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
  position: relative;
  text-decoration: none;
}

.cta-button:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--color-accent-glow);
}

.cta-button:active {
  transform: translateY(0);
}

.cta-button svg {
  width: 18px;
  height: 18px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.cta-button:hover svg {
  transform: translateX(3px);
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

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

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .lineup-days {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 90vh;
    padding-top: var(--space-4xl);
  }

  .act {
    padding: var(--space-md) var(--space-lg);
  }

  .day-header {
    padding: var(--space-md) var(--space-lg);
  }

  .cta-card {
    padding: var(--space-2xl) var(--space-lg);
  }
}

@media (max-width: 480px) {
  .act-name {
    font-size: 0.95rem;
  }

  .act-name.highlight {
    font-size: 1.05rem;
  }

  .event-logo {
    width: min(300px, 85vw);
  }
}