/* ===== Base ===== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

::selection {
  background: rgba(26, 227, 201, 0.3);
  color: #fff;
}

/* ===== Gradient text ===== */
.text-gradient {
  background: linear-gradient(135deg, #1AE3C9 0%, #49B7FF 50%, #FF8359 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Glass card ===== */
.glass-card {
  background: white;
  border: 1px solid #E2E8F0;
}

.dark .glass-card {
  background: linear-gradient(
    135deg,
    rgba(25, 39, 53, 0.85) 0%,
    rgba(16, 32, 50, 0.8) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* ===== Feature cards ===== */
.feature-card {
  display: block;
  padding: 2rem;
  border-radius: 1.5rem;
  background: white;
  border: 1px solid #E2E8F0;
  transition: all 0.3s ease;
}

.feature-card:hover {
  border-color: #CBD5E1;
  transform: translateY(-4px);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.08);
}

.dark .feature-card {
  background: linear-gradient(
    135deg,
    rgba(25, 39, 53, 0.85) 0%,
    rgba(16, 32, 50, 0.8) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.dark .feature-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-block;
  background: #1AE3C9;
  color: #04121D;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 9999px;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-primary:hover {
  background: #5EECD8;
  box-shadow: 0 0 40px rgba(26, 227, 201, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  background: rgba(11, 30, 48, 0.08);
  color: #0B1E30 !important;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 9999px;
  border: 2px solid rgba(11, 30, 48, 0.25);
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-secondary:hover {
  background: rgba(11, 30, 48, 0.15);
  border-color: rgba(11, 30, 48, 0.4);
  transform: translateY(-1px);
}

.dark .btn-secondary {
  background: rgba(215, 241, 255, 0.15);
  color: #ffffff !important;
  border: 2px solid rgba(215, 241, 255, 0.4);
}

.dark .btn-secondary:hover {
  background: rgba(215, 241, 255, 0.25);
  border-color: rgba(215, 241, 255, 0.6);
  box-shadow: 0 0 30px rgba(215, 241, 255, 0.15);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: #374151;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 9999px;
  border: 1px solid #D1D5DB;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-outline:hover {
  border-color: #9CA3AF;
  background: rgba(0, 0, 0, 0.04);
  transform: translateY(-1px);
}

.dark .btn-outline {
  color: #D7F1FF;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.dark .btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.08);
}

/* ===== Hero background ===== */
.hero-bg {
  display: none;
}

.dark .hero-bg {
  display: block;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(26, 227, 201, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 30% 60%, rgba(73, 183, 255, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 70% 50%, rgba(255, 131, 89, 0.04) 0%, transparent 50%);
}

.hero-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 227, 201, 0.1) 0%, rgba(73, 183, 255, 0.05) 40%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  display: none;
}

.dark .hero-glow {
  display: block;
}

/* ===== Section glows (dark only) ===== */
.section-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  opacity: 0;
}

.dark .section-glow {
  opacity: 0.4;
}

.section-glow-aqua {
  top: 10%;
  right: -10%;
  background: radial-gradient(circle, rgba(26, 227, 201, 0.15) 0%, transparent 70%);
}

.section-glow-ember {
  top: 20%;
  left: -10%;
  background: radial-gradient(circle, rgba(255, 131, 89, 0.12) 0%, transparent 70%);
}

.section-glow-foam {
  top: 10%;
  right: -10%;
  background: radial-gradient(circle, rgba(73, 183, 255, 0.12) 0%, transparent 70%);
}

.section-glow-accent {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(127, 219, 255, 0.1) 0%, transparent 70%);
}

/* ===== Section dividers ===== */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.08), transparent);
}

.dark .section-divider {
  background: linear-gradient(90deg, transparent, rgba(26, 227, 201, 0.2), transparent);
}

/* ===== CTA glow (dark only) ===== */
.cta-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 200%;
  background: none;
  pointer-events: none;
}

.dark .cta-glow {
  background: radial-gradient(ellipse at center, rgba(26, 227, 201, 0.08) 0%, transparent 60%);
}

/* ===== Navbar scrolled state ===== */
.nav-scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid #E2E8F0;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
}

.dark .nav-scrolled {
  background: rgba(11, 30, 48, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

/* ===== Parameter bars (mock UI) ===== */
.param-row {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.param-bar {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.06);
  overflow: hidden;
}

.dark .param-bar {
  background: rgba(255, 255, 255, 0.06);
}

.param-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 1s ease;
}

/* ===== Animations ===== */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* Logo glow pulse */
.logo-glow {
  filter: none;
}

.dark .logo-glow {
  filter: drop-shadow(0 0 20px rgba(26, 227, 201, 0.3));
}

/* ===== Pricing ring glow ===== */
.pricing-popular {
  box-shadow: 0 0 40px rgba(26, 227, 201, 0.15);
}

.dark .pricing-popular {
  box-shadow: 0 0 40px rgba(26, 227, 201, 0.1), inset 0 1px 0 rgba(26, 227, 201, 0.1);
}

/* ===== Scroll reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Staggered children */
.reveal-stagger > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger > *:nth-child(6) { transition-delay: 400ms; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-glow {
    width: 300px;
    height: 300px;
  }

  .section-glow {
    width: 300px;
    height: 300px;
  }
}