:root {
  --bg: #0a1a0f;
  --bg-court: #1a3a1f;
  --fg: #f0f5f1;
  --fg-muted: #8fa893;
  --accent: #4ade80;
  --accent-glow: rgba(74, 222, 128, 0.15);
  --court-line: #e8f0ea;
  --surface: #132618;
  --surface-hover: #1d3525;
  --ball-yellow: #ccff00;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== NAV ===== */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 2rem;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
}
.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.logo-dot { color: var(--accent); }
.cta-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid rgba(74,222,128,0.3);
  padding: 0.4rem 1rem;
  border-radius: 6px;
  transition: background 0.15s;
}
.cta-link:hover { background: var(--accent-glow); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(135deg, var(--bg) 0%, var(--bg-court) 50%, var(--bg) 100%);
  z-index: 0;
}

/* Court lines background pattern */
.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  border: 2px solid rgba(232, 240, 234, 0.06);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  margin-bottom: 2rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero h1 .highlight {
  color: var(--accent);
}

.hero .lede {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--fg-muted);
  max-width: 540px;
  line-height: 1.7;
}

.hero-actions {
  margin-top: 2.5rem;
}

.btn-primary {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: #0a1a0f;
  background: var(--accent);
  padding: 0.8rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: opacity 0.15s, transform 0.15s;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

/* Tennis ball decorative element */
.ball-accent {
  position: absolute;
  right: 10%;
  top: 30%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, var(--ball-yellow), #99cc00);
  opacity: 0.12;
  filter: blur(40px);
  z-index: 0;
}

/* ===== PROBLEM ===== */
.problem {
  padding: 6rem 2rem;
  position: relative;
}

.problem-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.problem-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.problem h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 3rem;
  max-width: 700px;
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  overflow: hidden;
}

.system-card {
  background: var(--surface);
  padding: 1.5rem;
}

.system-card .city {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.system-card .platform {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.system-card .platform.pain {
  color: #f87171;
}

/* ===== HOW IT WORKS ===== */
.how {
  padding: 6rem 2rem;
  background: var(--surface);
}

.how-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.how-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.how h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 3.5rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.step {
  position: relative;
}

.step-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ===== COURTS ===== */
.courts {
  padding: 6rem 2rem;
}

.courts-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.courts-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.courts h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.courts .sub {
  color: var(--fg-muted);
  margin-bottom: 3rem;
  max-width: 500px;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat {
  border-left: 2px solid var(--accent);
  padding-left: 1.2rem;
}

.stat .num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.1;
}

.stat .label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 0.2rem;
}

.city-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.city-tag {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 1.2rem;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 100px;
  color: var(--fg-muted);
  transition: all 0.2s;
}

.city-tag.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* ===== CLOSING ===== */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
}

.closing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--accent));
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.closing p {
  color: var(--fg-muted);
  font-size: 1.1rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ===== FOOTER ===== */
footer {
  padding: 2rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center;
}

footer p {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 4rem 1.5rem;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .problem, .how, .courts {
    padding: 4rem 1.5rem;
  }

  .closing {
    padding: 5rem 1.5rem;
  }

  .ball-accent {
    right: -5%;
    top: 15%;
    width: 120px;
    height: 120px;
  }
}

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

  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
}