/* Reset & base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: var(--fw-normal);
  font-size: 1rem;
  line-height: 1.6;
  color: #1a1a2e;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: 1.2;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: var(--fw-extrabold); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

.section-heading {
  text-align: center;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  font-family: var(--font-body);
  font-weight: var(--fw-medium);
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.btn:focus-visible { outline: 2px solid var(--brand-primary); outline-offset: 2px; }
.btn-primary {
  background: var(--brand-primary);
  color: #fff;
  box-shadow: var(--shadow-button);
}
.btn-primary:hover {
  background: var(--brand-primary-hover);
  box-shadow: 0 6px 20px rgba(91, 78, 232, 0.4);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.5);
}
.btn-ghost-dark {
  background: transparent;
  color: var(--brand-dark);
  border: 1px solid rgba(13,11,30,0.15);
}
.btn-ghost-dark:hover {
  background: rgba(13,11,30,0.04);
  border-color: rgba(13,11,30,0.25);
}
.btn-white {
  background: #fff;
  color: var(--brand-primary);
}
.btn-white:hover {
  background: var(--brand-light);
  transform: translateY(-1px);
}
.btn-teal {
  background: var(--accent-teal);
  color: #fff;
}
.btn-teal:hover {
  background: var(--accent-teal-bright);
  transform: translateY(-1px);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 768px) { .container { padding: 0 2rem; } }

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fade-up {
  animation: fadeUp 0.5s ease-out forwards;
}
.observe-invisible { opacity: 0; transform: translateY(24px); transition: opacity 0.5s ease, transform 0.5s ease; }
.observe-visible { opacity: 1; transform: translateY(0); }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.float-slow { animation: float 4s ease-in-out infinite; }
.float-delay-1 { animation-delay: 0.5s; }
.float-delay-2 { animation-delay: 1s; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.pulse-dot { animation: pulse-dot 2s ease-in-out infinite; }