:root {
  --brand-purple: #635bff;
  --brand-red: #e02e5c;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Geist Variable", "Geist", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.font-mono-brand {
  font-family: "Geist Mono Variable", "Geist Mono", ui-monospace, monospace;
}

.bg-brand-gradient {
  background-image: linear-gradient(90deg, var(--brand-purple), var(--brand-red));
}

.text-brand-gradient {
  background-image: linear-gradient(90deg, var(--brand-purple), var(--brand-red));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo-mark {
  color: #141414;
}

.dark .logo-mark {
  color: #ffffff;
}

.logo-mark svg path {
  fill: currentColor;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Hero brand card float */
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-float {
  animation: float-y 5s ease-in-out infinite;
}

@keyframes soft-glow {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(1.06); }
}

.hero-glow {
  background: radial-gradient(circle, rgba(99, 91, 255, 0.28), transparent 68%);
  animation: soft-glow 6s ease-in-out infinite;
}

/* CTA arrow nudge */
.btn-arrow {
  transition: transform 0.3s var(--ease-out);
}

.group:hover .btn-arrow {
  transform: translateX(3px);
}

/* Theme icon crossfade */
.theme-icon {
  transition: transform 0.35s var(--ease-out), opacity 0.25s ease;
}

.theme-toggle:hover .theme-icon {
  transform: rotate(18deg) scale(1.08);
}

/* Language switch */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: 999px;
  background: #f6f5f6;
}

.dark .lang-switch {
  background: #141414;
}

.lang-switch button {
  min-width: 36px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #6b7280;
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    transform 0.2s ease;
}

.dark .lang-switch button {
  color: #888c94;
}

.lang-switch button:hover {
  color: #141414;
}

.dark .lang-switch button:hover {
  color: #ffffff;
}

.lang-switch button.is-active {
  background: #ffffff;
  color: #141414;
  box-shadow: 0 1px 2px rgba(20, 20, 20, 0.08);
}

.dark .lang-switch button.is-active {
  background: #22252a;
  color: #ffffff;
}

html[data-lang="pt"] [data-lang-panel="en"],
html[data-lang="en"] [data-lang-panel="pt"] {
  display: none !important;
}

/* Mobile menu */
.mobile-nav {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height 0.4s var(--ease-out),
    opacity 0.3s ease,
    padding 0.3s ease;
}

.mobile-nav.is-open {
  max-height: 320px;
  opacity: 1;
}

/* Form focus ring */
.field-input:focus {
  outline: none;
  border-color: var(--brand-purple);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.18);
}

.dark .field-input:focus {
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.28);
}

/* Page enter */
@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-enter {
  animation: page-in 0.55s var(--ease-out) both;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .animate-float,
  .hero-glow,
  .page-enter {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}