:root {
  --primary-color: #6366f1;
  --secondary-color: #a855f7;
  --bg-color: #f8fafc;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --card-bg: rgba(255, 255, 255, 0.85);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-color);
  background-image: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
                    radial-gradient(at 100% 0%, rgba(168, 85, 247, 0.15) 0px, transparent 50%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.container {
  max-width: 600px;
  width: 100%;
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 24px;
  padding: 3rem;
  box-shadow: var(--glass-shadow);
  text-align: center;
  container-type: inline-size;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.05em;
}

.highlight {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  color: var(--text-muted);
  margin-bottom: 3rem;
  font-weight: 500;
}

.balls-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
  min-height: 120px;
  align-items: center;
}

/* Container Queries for responsive ball layout */
@container (min-width: 400px) {
  .balls-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.placeholder-text {
  grid-column: 1 / -1;
  color: var(--text-muted);
  font-style: italic;
  font-size: 0.9rem;
}

.lotto-ball {
  aspect-ratio: 1;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: white;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  animation: pop-in 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  opacity: 0;
}

@keyframes pop-in {
  0% { transform: scale(0.5); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

/* Ball Colors */
.ball-yellow { background: linear-gradient(135deg, #facc15, #eab308); }
.ball-blue { background: linear-gradient(135deg, #60a5fa, #3b82f6); }
.ball-red { background: linear-gradient(135deg, #f87171, #ef4444); }
.ball-gray { background: linear-gradient(135deg, #94a3b8, #64748b); }
.ball-green { background: linear-gradient(135deg, #4ade80, #22c55e); }

.primary-btn {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border: none;
  padding: 1rem 2.5rem;
  font-family: inherit;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 10px 20px -5px rgba(99, 102, 241, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.5);
}

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

.divider {
  border: 0;
  height: 1px;
  background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0));
  margin: 3rem 0;
}

.partnership-section {
  text-align: left;
}

.partnership-section h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.section-desc {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: white;
  font-family: inherit;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.secondary-btn {
  background: #1e293b;
  color: white;
  border: none;
  padding: 1rem;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}

.secondary-btn:hover {
  background: #0f172a;
}

/* Use :has() to highlight container when btn is hovered (if supported) */
.container:has(#generate-btn:hover) {
  border-color: var(--primary-color);
  transition: border-color 0.3s;
}

footer {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}