@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');
@import url('https://cdn.jsdelivr.net/npm/remixicon@2.5.0/fonts/remixicon.css');

:root {
  --kv-void: #0b0f1a;
  --kv-deep: #121834;
  --kv-primary: #6b21ff;
  --kv-primary-dark: #4c14c9;
  --kv-electric: #00e5ff;
  --kv-magenta: #ff2e88;
  --kv-surface: #f6f5fb;
  --kv-surface-alt: #ece9f9;
  --kv-text-dark: #12142b;
  --kv-text-mid: #454868;
  --kv-text-light: #e8e6ff;
  --kv-border: #d9d5f0;
  --kv-success: #17d68c;
  --kv-shadow: rgba(107, 33, 255, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--kv-surface);
  color: var(--kv-text-dark);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--kv-surface-alt);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--kv-primary), var(--kv-electric));
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--kv-primary-dark), var(--kv-electric));
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid var(--kv-border);
  box-shadow: 0 1px 24px rgba(18, 24, 51, 0.06);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 30px rgba(107, 33, 255, 0.15);
}

.logo-glow {
  filter: drop-shadow(0 0 6px rgba(107, 33, 255, 0.35));
}

.nav-link {
  position: relative;
  color: var(--kv-text-mid);
  font-weight: 500;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--kv-primary), var(--kv-electric));
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--kv-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--kv-primary);
}

/* Mobile Menu */
.mobile-menu-toggle {
  cursor: pointer;
}

.mobile-menu {
  background-color: #ffffff;
  border-top: 1px solid var(--kv-border);
}

.mobile-menu a {
  color: var(--kv-text-dark);
  border-bottom: 1px solid var(--kv-surface-alt);
}

.mobile-menu a:hover {
  color: var(--kv-primary);
  background-color: var(--kv-surface-alt);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--kv-primary), var(--kv-primary-dark));
  color: #ffffff;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 0.6rem;
  box-shadow: 0 6px 20px var(--kv-shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  border: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px var(--kv-shadow);
  filter: brightness(1.08);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--kv-primary);
  font-weight: 600;
  padding: 0.7rem 1.7rem;
  border-radius: 0.6rem;
  border: 2px solid var(--kv-primary);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background-color: var(--kv-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-electric {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--kv-electric), var(--kv-magenta));
  color: #0b0f1a;
  font-weight: 700;
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(0, 229, 255, 0.3);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  border: none;
}

.btn-electric:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 30px rgba(255, 46, 136, 0.35);
}

/* Cards */
.card {
  background-color: #ffffff;
  border: 1px solid var(--kv-border);
  border-radius: 1rem;
  padding: 2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(107, 33, 255, 0.18);
  border-color: var(--kv-primary);
}

.card-dark {
  background: linear-gradient(160deg, var(--kv-deep), var(--kv-void));
  color: var(--kv-text-light);
  border-radius: 1rem;
  padding: 2rem;
  border: 1px solid rgba(0, 229, 255, 0.15);
}

.card-dark h3,
.card-dark h4 {
  color: #ffffff;
}

.card-dark p {
  color: #c9c6f0;
}

.card-static {
  cursor: default;
}

.badge-popular {
  background: linear-gradient(135deg, var(--kv-electric), var(--kv-magenta));
  color: #0b0f1a;
  font-weight: 700;
  font-size: 0.75rem;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  display: inline-block;
  letter-spacing: 0.03em;
}

/* Grid Circuit Background Accent */
.circuit-bg {
  background-color: var(--kv-void);
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

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

.section-dark {
  background: linear-gradient(160deg, var(--kv-deep) 0%, var(--kv-void) 100%);
  color: var(--kv-text-light);
}

.section-dark h1,
.section-dark h2,
.section-dark h3 {
  color: #ffffff;
}

.section-dark p {
  color: #c9c6f0;
}

.section-dark a {
  color: var(--kv-electric);
}

/* Forms */
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 2px solid var(--kv-border);
  border-radius: 0.6rem;
  background-color: #ffffff;
  color: var(--kv-text-dark);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--kv-primary);
  box-shadow: 0 0 0 4px rgba(107, 33, 255, 0.12);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: #9691b8;
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--kv-text-dark);
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.form-group {
  position: relative;
  margin-bottom: 1.4rem;
}

.form-success {
  background-color: rgba(23, 214, 140, 0.1);
  border: 1px solid var(--kv-success);
  color: #0c8a5c;
  padding: 1rem;
  border-radius: 0.6rem;
}

/* Accordion */
.accordion-item {
  border: 1px solid var(--kv-border);
  border-radius: 0.75rem;
  margin-bottom: 0.9rem;
  overflow: hidden;
  background-color: #ffffff;
}

.accordion-header {
  cursor: pointer;
  padding: 1.1rem 1.4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--kv-text-dark);
  transition: background-color 0.25s ease;
}

.accordion-header:hover {
  background-color: var(--kv-surface-alt);
}

.accordion-header .ri-arrow-down-s-line {
  transition: transform 0.3s ease;
  color: var(--kv-primary);
}

.accordion-header.active .ri-arrow-down-s-line {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 0 1.4rem 1.2rem;
  color: var(--kv-text-mid);
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: linear-gradient(135deg, var(--kv-deep), var(--kv-void));
  color: var(--kv-text-light);
  padding: 1.25rem 1.5rem;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.3);
  border-top: 2px solid var(--kv-electric);
}

.cookie-banner h3 {
  color: #ffffff;
}

.cookie-banner p {
  color: #c9c6f0;
}

.cookie-banner a {
  color: #7fe9ff;
  text-decoration: underline;
}

.cookie-banner .btn-primary {
  background: linear-gradient(135deg, var(--kv-electric), var(--kv-magenta));
  color: #0b0f1a;
  box-shadow: none;
}

.cookie-banner .btn-primary:hover {
  filter: brightness(1.1);
  color: #0b0f1a;
}

/* Spinner / Loader */
.kv-spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--kv-surface-alt);
  border-top-color: var(--kv-primary);
  border-radius: 50%;
  animation: kv-spin 0.8s linear infinite;
}

@keyframes kv-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Fade / Slide Animations */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.4);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(0, 229, 255, 0);
  }
}

.pulse-dot {
  animation: pulse-glow 2s infinite;
  border-radius: 999px;
}

/* Hero */
.hero-gradient {
  background: radial-gradient(circle at 20% 20%, rgba(107, 33, 255, 0.15), transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(0, 229, 255, 0.15), transparent 50%),
              var(--kv-void);
}

/* Stats */
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--kv-electric), var(--kv-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Footer */
.site-footer {
  background: linear-gradient(160deg, var(--kv-deep), var(--kv-void));
  color: var(--kv-text-light);
}

.site-footer h3,
.site-footer h4 {
  color: #ffffff;
}

.site-footer p,
.site-footer span {
  color: #b6b2e0;
}

.site-footer a {
  color: #c9c6f0;
  transition: color 0.25s ease;
}

.site-footer a:hover {
  color: var(--kv-electric);
}

.social-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  transition: background-color 0.25s ease, transform 0.25s ease;
}

.social-icon:hover {
  background: linear-gradient(135deg, var(--kv-primary), var(--kv-electric));
  transform: translateY(-3px);
}

/* Divider */
.divider-gradient {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--kv-primary), var(--kv-electric), transparent);
  border: none;
}

/* Utility */
.text-primary-kv {
  color: var(--kv-primary);
}

.bg-surface-alt {
  background-color: var(--kv-surface-alt);
}

.shadow-kv {
  box-shadow: 0 10px 34px rgba(107, 33, 255, 0.15);
}

@media (max-width: 768px) {
  .stat-number {
    font-size: 1.9rem;
  }
  .card {
    padding: 1.5rem;
  }
}