@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 {
  --krov-void: #0b0e1a;
  --krov-deep: #121629;
  --krov-surface: #1a1f38;
  --krov-primary: #7c3aed;
  --krov-primary-light: #a78bfa;
  --krov-accent: #00e6a8;
  --krov-accent-dark: #00b384;
  --krov-electric: #4361ee;
  --krov-warn: #ff6b6b;
  --krov-text-light: #e8eaf6;
  --krov-text-muted: #9ca3d4;
  --krov-border: #2a3158;
  --radius-md: 10px;
  --radius-lg: 18px;
  --transition-fast: 0.2s ease;
  --transition-med: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--krov-text-light);
  background-color: #f8fafc;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--krov-void);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--krov-primary), var(--krov-accent));
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--krov-primary-light), var(--krov-accent-dark));
}

/* ===== HEADER ===== */
.site-header {
  background-color: var(--krov-void);
  border-bottom: 1px solid var(--krov-border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow var(--transition-fast);
}
.site-header.scrolled {
  box-shadow: 0 10px 30px -10px rgba(124, 58, 237, 0.4);
}
.site-header a,
.site-header span {
  color: var(--krov-text-light);
}
.nav-link {
  position: relative;
  color: var(--krov-text-muted);
  font-weight: 500;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--krov-primary), var(--krov-accent));
  transition: width var(--transition-med);
}
.nav-link:hover {
  color: var(--krov-text-light);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: var(--krov-accent);
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
  background-color: var(--krov-deep);
  border-top: 1px solid var(--krov-border);
}
.mobile-menu a {
  color: var(--krov-text-light);
  border-bottom: 1px solid var(--krov-border);
}
.mobile-menu a:hover {
  color: var(--krov-accent);
  background-color: rgba(124, 58, 237, 0.08);
}
.mobile-menu-toggle {
  color: var(--krov-text-light);
  font-size: 1.75rem;
  cursor: pointer;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--krov-primary), var(--krov-electric));
  color: #ffffff;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 20px -6px rgba(124, 58, 237, 0.55);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px -8px rgba(124, 58, 237, 0.7);
  filter: brightness(1.08);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--krov-accent);
  color: #06231a;
  font-weight: 700;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 20px -6px rgba(0, 230, 168, 0.5);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  cursor: pointer;
}
.btn-accent:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px -8px rgba(0, 230, 168, 0.65);
  background-color: var(--krov-accent-dark);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: transparent;
  color: var(--krov-primary-light);
  font-weight: 600;
  padding: 0.7rem 1.7rem;
  border-radius: var(--radius-md);
  border: 2px solid var(--krov-primary-light);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.btn-outline:hover {
  background-color: var(--krov-primary-light);
  color: var(--krov-void);
}

/* ===== HERO / SECTIONS ===== */
.hero-dark {
  background: radial-gradient(circle at 20% 20%, rgba(124, 58, 237, 0.35), transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(0, 230, 168, 0.25), transparent 50%),
    var(--krov-void);
  color: var(--krov-text-light);
}
.hero-dark h1,
.hero-dark h2 {
  color: #ffffff;
}
.hero-dark p {
  color: var(--krov-text-muted);
}

.grid-glow {
  background-image:
    linear-gradient(rgba(124, 58, 237, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

.section-alt {
  background-color: #f1f3fb;
}

/* ===== CARDS ===== */
.tech-card {
  background-color: #ffffff;
  border: 1px solid #e5e7f5;
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-fast);
  cursor: default;
}
.tech-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px -18px rgba(67, 97, 238, 0.35);
  border-color: var(--krov-primary-light);
}
.tech-card .icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--krov-primary), var(--krov-electric));
  color: #ffffff;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.dark-card {
  background-color: var(--krov-surface);
  border: 1px solid var(--krov-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  color: var(--krov-text-light);
  transition: border-color var(--transition-fast), transform var(--transition-med);
}
.dark-card h3 {
  color: #ffffff;
}
.dark-card p {
  color: var(--krov-text-muted);
}
.dark-card:hover {
  border-color: var(--krov-accent);
  transform: translateY(-4px);
}

/* ===== ACCORDION ===== */
.accordion-item {
  border: 1px solid #e5e7f5;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 0.75rem;
  background-color: #ffffff;
}
.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  color: #1a1f38;
  transition: background-color var(--transition-fast);
}
.accordion-header:hover {
  background-color: #f4f2ff;
}
.accordion-header i {
  transition: transform var(--transition-med);
  color: var(--krov-primary);
}
.accordion-header.active i {
  transform: rotate(180deg);
}
.accordion-content {
  display: none;
  padding: 0 1.5rem 1.25rem;
  color: #4b5178;
  line-height: 1.7;
}

/* ===== FORMS ===== */
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background-color: #ffffff;
  border: 2px solid #e0e3f5;
  border-radius: var(--radius-md);
  padding: 0.85rem 1.1rem;
  color: #1a1f38;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: #9ca3c4;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--krov-primary);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.15);
}
.form-label {
  display: block;
  font-weight: 600;
  color: #1a1f38;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}
.form-group {
  margin-bottom: 1.5rem;
}

/* ===== STICKY HEADER SCROLL EFFECT (JS toggles .scrolled) ===== */
.site-header {
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* ===== COOKIE BANNER ===== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background-color: var(--krov-void);
  border-top: 1px solid var(--krov-border);
  color: var(--krov-text-light);
  box-shadow: 0 -10px 30px -10px rgba(0, 0, 0, 0.5);
}
.cookie-banner h3 {
  color: #ffffff;
}
.cookie-banner p {
  color: var(--krov-text-muted);
}
.cookie-banner a {
  color: #93c5fd;
  text-decoration: underline;
}
.cookie-banner a:hover {
  color: #bfdbfe;
}

/* ===== SPINNER / LOADING ===== */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(124, 58, 237, 0.2);
  border-top-color: var(--krov-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.animate-fade-up {
  animation: fadeUp 0.7s ease forwards;
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(0, 230, 168, 0.4);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(0, 230, 168, 0);
  }
}
.pulse-glow {
  animation: pulseGlow 2.4s infinite;
}

/* ===== BADGES / TAGS ===== */
.tag-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: rgba(124, 58, 237, 0.1);
  color: var(--krov-primary);
  border: 1px solid rgba(124, 58, 237, 0.3);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
}
.tag-badge-accent {
  background-color: rgba(0, 230, 168, 0.12);
  color: var(--krov-accent-dark);
  border-color: rgba(0, 230, 168, 0.35);
}

.badge-popular {
  background: linear-gradient(135deg, var(--krov-accent), var(--krov-accent-dark));
  color: #06231a;
  font-weight: 700;
  padding: 0.3rem 1rem;
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* ===== FOOTER ===== */
.site-footer {
  background-color: var(--krov-deep);
  color: var(--krov-text-muted);
  border-top: 1px solid var(--krov-border);
}
.site-footer h4 {
  color: #ffffff;
}
.site-footer a {
  color: var(--krov-text-muted);
  transition: color var(--transition-fast);
}
.site-footer a:hover {
  color: var(--krov-accent);
}

/* ===== DIVIDERS / GRADIENT LINES ===== */
.gradient-divider {
  height: 3px;
  background: linear-gradient(90deg, var(--krov-primary), var(--krov-accent), var(--krov-electric));
  border-radius: 3px;
}

/* ===== UTILITY ===== */
.text-gradient {
  background: linear-gradient(135deg, var(--krov-primary-light), var(--krov-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.shadow-glow {
  box-shadow: 0 0 40px -8px rgba(124, 58, 237, 0.45);
}

.border-glow {
  border: 1px solid var(--krov-border);
  transition: border-color var(--transition-fast);
}
.border-glow:hover {
  border-color: var(--krov-primary-light);
}

@media (max-width: 768px) {
  .hero-dark {
    text-align: center;
  }
  .tech-card,
  .dark-card {
    padding: 1.5rem;
  }
}