:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-2: #f1f4f8;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #111827;
  --primary-soft: #eef2f7;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #059669;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.header-content {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.main-nav a,
.nav-button {
  color: var(--muted);
  font-weight: 700;
  font-size: 0.95rem;
}

.main-nav a:hover,
.nav-button:hover {
  color: var(--text);
}

.nav-button {
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.hero {
  padding: 88px 0 72px;
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.12), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f7f8fb 100%);
}

.hero .container {
  max-width: 850px;
  text-align: center;
}

.hero-badge,
.section-label {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.hero p {
  max-width: 700px;
  margin: 24px auto 32px;
  color: var(--muted);
  font-size: 1.08rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 0 22px;
  font-weight: 800;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.22);
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--primary);
  color: #ffffff;
}

.btn-full {
  width: 100%;
}

.concerts-section {
  padding: 72px 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-heading h2,
.tickets-help h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.035em;
}

.concert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 24px;
}

.concert-card {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.concert-visual {
  min-height: 230px;
  padding: 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  background:
    linear-gradient(135deg, rgba(17, 24, 39, 0.95), rgba(37, 99, 235, 0.88));
  color: #ffffff;
}

.concert-date {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.22);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.concert-date strong {
  font-size: 1.8rem;
  line-height: 1;
}

.concert-date span {
  margin-top: 4px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.concert-type {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 0.8rem;
  font-weight: 700;
}

.concert-content {
  padding: 28px;
}

.concert-content h3 {
  margin: 0 0 18px;
  font-size: 1.45rem;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.concert-info {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.concert-info p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.artists {
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 700;
}

.prices {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 20px 0 24px;
}

.prices span {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.85rem;
}

.prices strong {
  color: var(--text);
  font-size: 1rem;
}

.tickets-help {
  padding: 34px 0 72px;
}

.tickets-help-content {
  padding: 34px;
  border-radius: var(--radius-lg);
  background: var(--primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.tickets-help .section-label {
  color: #93c5fd;
}

.tickets-help p {
  max-width: 650px;
  margin: 12px 0 0;
  color: #d1d5db;
}

.tickets-help .btn-secondary {
  flex: 0 0 auto;
  background: #ffffff;
  color: var(--primary);
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-content {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 22px, 1120px);
  }

  .header-content {
    min-height: 64px;
  }

  .main-nav {
    gap: 14px;
  }

  .main-nav a {
    display: none;
  }

  .hero {
    padding: 62px 0 50px;
  }

  .hero h1 {
    font-size: clamp(2.25rem, 12vw, 3.4rem);
  }

  .hero p {
    font-size: 1rem;
  }

  .concerts-section {
    padding: 52px 0;
  }

  .concert-visual {
    min-height: 190px;
  }

  .concert-content {
    padding: 22px;
  }

  .prices {
    grid-template-columns: 1fr;
  }

  .tickets-help {
    padding-bottom: 52px;
  }

  .tickets-help-content {
    padding: 26px 22px;
    flex-direction: column;
    align-items: stretch;
  }

  .tickets-help .btn-secondary {
    width: 100%;
  }

  .footer-content {
    padding: 22px 0;
    min-height: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}