@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 {
  --velnor-void: #0b0e1a;
  --velnor-deep: #11152a;
  --velnor-panel: #161b36;
  --velnor-violet: #7c3aed;
  --velnor-violet-light: #a78bfa;
  --velnor-cyan: #22d3ee;
  --velnor-lime: #c4f000;
  --velnor-pink: #f472b6;
  --velnor-text: #e2e5f5;
  --velnor-text-dim: #9ba3c4;
  --velnor-border: #2a3157;
  --gradient-main: linear-gradient(135deg, #7c3aed 0%, #22d3ee 100%);
  --gradient-alt: linear-gradient(135deg, #f472b6 0%, #7c3aed 100%);
  --shadow-glow: 0 0 24px rgba(124, 58, 237, 0.35);
  --shadow-glow-cyan: 0 0 20px rgba(34, 211, 238, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--velnor-void);
  color: var(--velnor-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--velnor-void);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--velnor-violet), var(--velnor-cyan));
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--velnor-violet-light);
}

/* Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: var(--velnor-deep);
  border-bottom: 1px solid var(--velnor-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease;
}

.site-header .logo-mark {
  filter: drop-shadow(0 0 8px rgba(124, 58, 237, 0.5));
}

.nav-link {
  position: relative;
  color: var(--velnor-text-dim);
  font-weight: 500;
  transition: color 0.25s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  height: 2px;
  width: 0%;
  background: var(--gradient-main);
  transition: width 0.3s ease;
  border-radius: 2px;
}
.nav-link:hover {
  color: var(--velnor-text);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: #fff;
}

/* Mobile Menu */
.mobile-menu {
  background-color: var(--velnor-deep);
  border-top: 1px solid var(--velnor-border);
}
.mobile-menu a {
  color: var(--velnor-text-dim);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.mobile-menu a:hover {
  color: var(--velnor-lime);
  background-color: rgba(124, 58, 237, 0.08);
}
.mobile-menu-toggle {
  color: var(--velnor-text);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--gradient-main);
  color: #ffffff;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  border: none;
  box-shadow: var(--shadow-glow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
  cursor: pointer;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(124, 58, 237, 0.55);
  filter: brightness(1.08);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: transparent;
  color: var(--velnor-cyan);
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  border: 2px solid var(--velnor-cyan);
  transition: all 0.25s ease;
  cursor: pointer;
}
.btn-secondary:hover {
  background-color: var(--velnor-cyan);
  color: var(--velnor-void);
  box-shadow: var(--shadow-glow-cyan);
}

.btn-lime {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--velnor-lime);
  color: #0b0e1a;
  font-weight: 700;
  padding: 0.75rem 1.75rem;
  border-radius: 0.5rem;
  transition: all 0.25s ease;
  cursor: pointer;
}
.btn-lime:hover {
  transform: scale(1.03);
  box-shadow: 0 0 20px rgba(196, 240, 0, 0.4);
}

/* Cards */
.tech-card {
  background-color: var(--velnor-panel);
  border: 1px solid var(--velnor-border);
  border-radius: 1rem;
  padding: 2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}
.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-main);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.tech-card:hover {
  transform: translateY(-6px);
  border-color: var(--velnor-violet);
  box-shadow: var(--shadow-glow);
}
.tech-card:hover::before {
  opacity: 1;
}

.card-static {
  cursor: default;
}

/* Grid layout helper */
.tech-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Accordion */
.accordion-item {
  border: 1px solid var(--velnor-border);
  border-radius: 0.75rem;
  background-color: var(--velnor-panel);
  margin-bottom: 1rem;
  overflow: hidden;
}
.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--velnor-text);
  transition: background-color 0.25s ease;
}
.accordion-header:hover {
  background-color: rgba(124, 58, 237, 0.1);
}
.accordion-header .icon-chevron {
  transition: transform 0.3s ease;
  color: var(--velnor-cyan);
}
.accordion-header.active .icon-chevron {
  transform: rotate(180deg);
}
.accordion-content {
  display: none;
  padding: 0 1.5rem 1.25rem;
  color: var(--velnor-text-dim);
  line-height: 1.7;
}

/* Forms */
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  background-color: var(--velnor-deep);
  border: 1px solid var(--velnor-border);
  color: var(--velnor-text);
  padding: 0.85rem 1rem;
  border-radius: 0.5rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--velnor-text-dim);
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--velnor-violet);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.25);
}
.form-label {
  display: block;
  font-weight: 600;
  color: var(--velnor-text);
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}
.form-panel {
  background-color: var(--velnor-panel);
  border: 1px solid var(--velnor-border);
  border-radius: 1rem;
  padding: 2.5rem;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--velnor-deep);
  border-top: 1px solid var(--velnor-violet);
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
  padding: 1.25rem;
}
.cookie-banner h3,
.cookie-banner strong {
  color: #ffffff;
}
.cookie-banner p,
.cookie-banner span {
  color: #c7cbe6;
}
.cookie-banner a {
  color: var(--velnor-cyan);
  text-decoration: underline;
}
.cookie-banner a:hover {
  color: var(--velnor-lime);
}

/* Hero / Glow elements */
.hero-glow {
  position: relative;
  overflow: hidden;
}
.hero-glow::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.35), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}
.hero-glow::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.25), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-popular {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--gradient-alt);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Loading Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--velnor-border);
  border-top-color: var(--velnor-violet);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Fade-in Utility */
.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section styling */
.section-alt {
  background-color: var(--velnor-deep);
  border-top: 1px solid var(--velnor-border);
  border-bottom: 1px solid var(--velnor-border);
}

.divider-glow {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--velnor-violet), transparent);
  margin: 3rem 0;
}

/* Footer */
.site-footer {
  background-color: var(--velnor-void);
  border-top: 1px solid var(--velnor-border);
  color: var(--velnor-text-dim);
}
.site-footer a {
  color: var(--velnor-text-dim);
  transition: color 0.25s ease;
}
.site-footer a:hover {
  color: var(--velnor-cyan);
}
.site-footer h3,
.site-footer h4 {
  color: #ffffff;
}

/* Stat/Number blocks */
.stat-block {
  text-align: center;
  padding: 1.5rem;
}
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label {
  color: var(--velnor-text-dim);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .form-panel {
    padding: 1.5rem;
  }
  .tech-card {
    padding: 1.5rem;
  }
  .hero-glow::before,
  .hero-glow::after {
    width: 250px;
    height: 250px;
  }
}