@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 {
  --vertex-void: #0A0E1A;
  --vertex-deep: #121828;
  --vertex-panel: #1A2238;
  --vertex-violet: #7B2FF7;
  --vertex-violet-dark: #5A1FBD;
  --vertex-cyan: #23E5DB;
  --vertex-lime: #C6FF3D;
  --vertex-magenta: #FF3DA6;
  --vertex-text: #E7ECF5;
  --vertex-text-dim: #9AA6C2;
  --vertex-border: rgba(123, 47, 247, 0.25);
  --vertex-gradient: linear-gradient(135deg, var(--vertex-violet) 0%, var(--vertex-cyan) 100%);
  --vertex-gradient-2: linear-gradient(120deg, var(--vertex-magenta) 0%, var(--vertex-violet) 55%, var(--vertex-cyan) 100%);
  --shadow-glow: 0 0 25px rgba(123, 47, 247, 0.35);
  --shadow-glow-cyan: 0 0 25px rgba(35, 229, 219, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--vertex-void);
}
::-webkit-scrollbar-thumb {
  background: var(--vertex-gradient);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--vertex-cyan);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--vertex-void);
  border-bottom: 1px solid var(--vertex-border);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.logo-mark {
  filter: drop-shadow(0 0 8px rgba(123, 47, 247, 0.5));
}

.nav-link {
  position: relative;
  color: var(--vertex-text-dim);
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--vertex-gradient);
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: var(--vertex-text);
}

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

.nav-link.active {
  color: var(--vertex-cyan);
}

/* Mobile menu */
.mobile-menu {
  background-color: var(--vertex-deep);
  border-top: 1px solid var(--vertex-border);
}

.mobile-menu-toggle {
  color: var(--vertex-text);
}

/* Buttons */
.btn-vertex-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: var(--vertex-gradient);
  color: #ffffff;
  font-weight: 600;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  transition: all 0.35s ease;
  box-shadow: var(--shadow-glow);
}

.btn-vertex-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(123, 47, 247, 0.55);
}

.btn-vertex-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.9rem;
  background: transparent;
  color: var(--vertex-cyan);
  font-weight: 600;
  border-radius: 9999px;
  border: 2px solid var(--vertex-cyan);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-vertex-outline:hover {
  background: var(--vertex-cyan);
  color: var(--vertex-void);
  box-shadow: var(--shadow-glow-cyan);
}

.btn-lime {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: var(--vertex-lime);
  color: #0A0E1A;
  font-weight: 700;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-lime:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(198, 255, 61, 0.35);
}

/* Cards */
.tech-card {
  background: var(--vertex-panel);
  border: 1px solid var(--vertex-border);
  border-radius: 16px;
  padding: 2rem;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.tech-card:hover {
  transform: translateY(-6px);
  border-color: var(--vertex-cyan);
  box-shadow: var(--shadow-glow-cyan);
}

.tech-card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--vertex-gradient);
  color: #fff;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.card-flat {
  background: var(--vertex-deep);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 1.75rem;
}

/* Gradient text */
.gradient-text {
  background: var(--vertex-gradient-2);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Section backgrounds */
.section-void {
  background-color: var(--vertex-void);
}

.section-deep {
  background-color: var(--vertex-deep);
}

.section-grid-bg {
  background-image:
    linear-gradient(rgba(123, 47, 247, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(123, 47, 247, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Hero glow blob */
.glow-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
  pointer-events: none;
}

/* Accordion */
.accordion-item {
  border: 1px solid var(--vertex-border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1rem;
  background: var(--vertex-deep);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  color: var(--vertex-text);
  font-weight: 600;
  transition: background 0.3s ease;
}

.accordion-header:hover {
  background: rgba(123, 47, 247, 0.08);
}

.accordion-header i {
  transition: transform 0.3s ease;
  color: var(--vertex-cyan);
}

.accordion-header.active i {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 0 1.5rem 1.5rem;
  color: var(--vertex-text-dim);
  line-height: 1.7;
}

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

.form-vertex input,
.form-vertex textarea,
.form-vertex select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: var(--vertex-deep);
  border: 1.5px solid var(--vertex-border);
  border-radius: 10px;
  color: var(--vertex-text);
  margin-bottom: 1.25rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-vertex input::placeholder,
.form-vertex textarea::placeholder {
  color: var(--vertex-text-dim);
}

.form-vertex input:focus,
.form-vertex textarea:focus,
.form-vertex select:focus {
  outline: none;
  border-color: var(--vertex-cyan);
  box-shadow: 0 0 0 4px rgba(35, 229, 219, 0.15);
}

.form-vertex input:invalid:not(:placeholder-shown) {
  border-color: var(--vertex-magenta);
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background-color: var(--vertex-deep);
  border-top: 1px solid var(--vertex-border);
  color: #E7ECF5;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.5);
}

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

.cookie-banner p {
  color: #C3CBE0;
}

.cookie-banner a {
  color: #7FE3FF;
  text-decoration: underline;
}

/* Badges */
.badge-vertex {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  background: rgba(123, 47, 247, 0.15);
  color: var(--vertex-cyan);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--vertex-border);
}

.badge-popular {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.85rem;
  border-radius: 9999px;
  background: var(--vertex-lime);
  color: #0A0E1A;
  font-size: 0.75rem;
  font-weight: 700;
}

/* Loading spinner */
.vertex-spinner {
  width: 44px;
  height: 44px;
  border: 4px solid rgba(123, 47, 247, 0.2);
  border-top-color: var(--vertex-cyan);
  border-radius: 50%;
  animation: vertex-spin 0.9s linear infinite;
}

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

/* Fade / slide animations */
.fade-in-up {
  animation: fadeInUp 0.7s ease both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.pulse-dot {
  animation: pulseDot 2s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.15); }
}

/* Timeline */
.timeline-line {
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--vertex-gradient);
}

.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--vertex-cyan);
  box-shadow: 0 0 0 4px var(--vertex-void), 0 0 15px var(--vertex-cyan);
}

/* Footer */
.site-footer {
  background-color: var(--vertex-deep);
  border-top: 1px solid var(--vertex-border);
  color: var(--vertex-text-dim);
}

.site-footer a {
  color: var(--vertex-text-dim);
  transition: color 0.3s ease;
}

.site-footer a:hover {
  color: var(--vertex-cyan);
}

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

/* Divider glow */
.divider-glow {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--vertex-violet), var(--vertex-cyan), transparent);
}

/* Utility hover-lift */
.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* Responsive tweaks */
@media (max-width: 768px) {
  .glow-blob {
    filter: blur(60px);
  }
}