:root {
  --color-primary: #0ea5e9; /* sky-500 */
  --color-accent: #facc15; /* yellow-400 */
  --color-neutral-dark: #1e293b; /* slate-800 */
  --color-neutral-light: #f1f5f9; /* slate-100 */
}
html {
  scroll-behavior: smooth;
  font-family: 'Inter', 'Poppins', 'Manrope', sans-serif;
  background-color: var(--color-neutral-light);
  color: var(--color-neutral-dark);
}
body.dark {
  background-color: var(--color-neutral-dark);
  color: var(--color-neutral-light);
}
/* Typewriter effect for hero headline */
.typewriter {
  overflow: hidden;
  border-right: .15em solid var(--color-accent);
  white-space: nowrap;
  animation: typing 3.5s steps(30, end), blink-caret .75s step-end infinite;
}
@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}
@keyframes blink-caret {
  50% { border-color: transparent }
}
/* Glitch effect for hero headline */
.glitch {
  position: relative;
  color: var(--color-primary);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 4rem);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  animation: glitch-anim 2s infinite;
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  width: 100%;
  overflow: hidden;
  clip: rect(0, 900px, 0, 0);
}
.glitch::before {
  animation: glitch-anim-before 2s infinite;
  color: var(--color-accent);
  z-index: -1;
}
.glitch::after {
  animation: glitch-anim-after 2s infinite;
  color: var(--color-primary);
  z-index: -2;
}
@keyframes glitch-anim {
  0% {
    text-shadow: 2px 0 var(--color-accent), -2px 0 var(--color-primary);
  }
  20% {
    text-shadow: -2px 0 var(--color-accent), 2px 0 var(--color-primary);
  }
  40% {
    text-shadow: 2px 2px var(--color-accent), -2px -2px var(--color-primary);
  }
  60% {
    text-shadow: -2px 2px var(--color-accent), 2px -2px var(--color-primary);
  }
  80% {
    text-shadow: 2px 0 var(--color-accent), -2px 0 var(--color-primary);
  }
  100% {
    text-shadow: none;
  }
}
@keyframes glitch-anim-before {
  0% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
  10% {
    clip: rect(10px, 900px, 50px, 0);
    transform: translate(-2px, -2px);
  }
  20% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
  30% {
    clip: rect(20px, 900px, 60px, 0);
    transform: translate(-2px, 2px);
  }
  40% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
  100% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
}
@keyframes glitch-anim-after {
  0% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
  10% {
    clip: rect(30px, 900px, 70px, 0);
    transform: translate(2px, 2px);
  }
  20% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
  30% {
    clip: rect(40px, 900px, 80px, 0);
    transform: translate(2px, -2px);
  }
  40% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
  100% {
    clip: rect(0, 900px, 0, 0);
    transform: translate(0);
  }
}
/* Scroll to top button */
#scrollTopBtn {
  position: fixed;
  bottom: 2.5rem;
  right: 2.5rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 9999px;
  padding: 0.75rem 1rem;
  font-size: 1.25rem;
  box-shadow: 0 4px 6px rgb(0 0 0 / 0.3);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease-in-out;
  z-index: 50;
}
#scrollTopBtn.show {
  opacity: 1;
  pointer-events: auto;
}
/* Accordion custom */
[data-accordion] > button {
  width: 100%;
  text-align: left;
  font-weight: 600;
  padding: 1rem 1.25rem;
  background-color: var(--color-neutral-light);
  border: none;
  border-bottom: 1px solid #cbd5e1;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.3s ease;
}
[data-accordion] > button:hover,
[data-accordion] > button[aria-expanded="true"] {
  background-color: var(--color-primary);
  color: white;
}
[data-accordion] > div {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background-color: var(--color-neutral-light);
  padding: 0 1.25rem;
}
[data-accordion] > div.open {
  padding: 1rem 1.25rem;
  max-height: 1000px; /* large enough */
}
/* Button hover and focus */
.btn-primary {
  background-color: var(--color-primary);
  color: white;
  font-weight: 600;
  border-radius: 9999px;
  padding: 0.75rem 2rem;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 2px 6px rgb(14 165 233 / 0.5);
}
.btn-primary:hover,
.btn-primary:focus {
  background-color: #0284c7;
  box-shadow: 0 4px 12px rgb(14 165 233 / 0.8);
  outline: none;
}
.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-neutral-dark);
  font-weight: 600;
  border-radius: 9999px;
  padding: 0.75rem 2rem;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 2px 6px rgb(250 204 21 / 0.5);
}
.btn-accent:hover,
.btn-accent:focus {
  background-color: #eab308;
  box-shadow: 0 4px 12px rgb(250 204 21 / 0.8);
  outline: none;
}
/* Dark mode toggle */
#darkModeToggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: color 0.3s ease;
}
#darkModeToggle:hover,
#darkModeToggle:focus {
  color: var(--color-accent);
  outline: none;
}
/* Testimonial slider */
.testimonial-slide {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  position: absolute;
  width: 100%;
  top: 0;
  left: 0;
}
.testimonial-slide.active {
  opacity: 1;
  transform: translateX(0);
  position: relative;
}
/* Footer links */
.footer-links a {
  transition: color 0.3s ease;
}
.footer-links a:hover,
.footer-links a:focus {
  color: var(--color-accent);
  outline: none;
}