@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 {
  --crovia-void: #0B0E1A;
  --crovia-deep: #131A2E;
  --crovia-surface: #1B2440;
  --crovia-primary: #6C4FF6;
  --crovia-primary-dark: #4F35D1;
  --crovia-electric: #00E8C6;
  --crovia-electric-dark: #00BFA3;
  --crovia-accent: #FF3D81;
  --crovia-lime: #C6FF3D;
  --crovia-text: #E6E9F5;
  --crovia-text-dim: #9BA3C4;
  --crovia-border: #2A3358;
  --crovia-radius: 14px;
  --crovia-shadow: 0 10px 30px rgba(108, 79, 246, 0.25);
  --crovia-shadow-lg: 0 20px 50px rgba(0, 232, 198, 0.15);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--crovia-text);
  background-color: #F7F8FC;
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--crovia-void);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--crovia-primary), var(--crovia-electric));
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--crovia-electric), var(--crovia-primary));
}

/* ===== Sticky Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: var(--crovia-void);
  border-bottom: 1px solid var(--crovia-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

.site-header .logo-mark {
  filter: drop-shadow(0 0 8px rgba(0, 232, 198, 0.4));
}

.nav-link {
  position: relative;
  color: var(--crovia-text-dim);
  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(--crovia-electric), var(--crovia-primary));
  transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--crovia-text);
}

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

/* ===== Mobile Menu Toggle ===== */
.mobile-menu-toggle {
  color: var(--crovia-text);
  font-size: 28px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.mobile-menu-toggle:hover {
  transform: rotate(90deg);
  color: var(--crovia-electric);
}

.mobile-menu {
  background-color: var(--crovia-deep);
  border-top: 1px solid var(--crovia-border);
}

.mobile-menu a {
  color: var(--crovia-text-dim);
  border-bottom: 1px solid var(--crovia-border);
}

.mobile-menu a:hover {
  color: var(--crovia-electric);
  background-color: rgba(108, 79, 246, 0.08);
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--crovia-primary), var(--crovia-primary-dark));
  color: #ffffff;
  font-weight: 600;
  border-radius: 999px;
  box-shadow: var(--crovia-shadow);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(108, 79, 246, 0.4);
  background: linear-gradient(135deg, var(--crovia-primary-dark), var(--crovia-primary));
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  background: transparent;
  color: var(--crovia-electric);
  font-weight: 600;
  border-radius: 999px;
  border: 2px solid var(--crovia-electric);
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-secondary:hover {
  background-color: var(--crovia-electric);
  color: var(--crovia-void);
  box-shadow: 0 10px 25px rgba(0, 232, 198, 0.35);
}

.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--crovia-accent);
  color: #ffffff;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(255, 61, 129, 0.3);
}

.btn-accent:hover {
  background: #E62D6F;
  transform: scale(1.04);
}

/* ===== Forms ===== */
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 18px;
  background-color: #ffffff;
  border: 2px solid #E2E5F0;
  border-radius: 10px;
  color: #1A1F36;
  transition: all 0.25s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--crovia-primary);
  box-shadow: 0 0 0 4px rgba(108, 79, 246, 0.15);
}

.form-label {
  display: block;
  font-weight: 600;
  color: #1A1F36;
  margin-bottom: 6px;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.form-card {
  background: #ffffff;
  border-radius: var(--crovia-radius);
  padding: 40px;
  box-shadow: 0 20px 50px rgba(19, 26, 46, 0.08);
  border: 1px solid #EDEFF7;
}

/* ===== Cards ===== */
.tech-card {
  background: #ffffff;
  border-radius: var(--crovia-radius);
  padding: 32px;
  border: 1px solid #EDEFF7;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--crovia-primary), var(--crovia-electric));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.tech-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--crovia-shadow-lg);
}

.tech-card:hover::before {
  transform: scaleX(1);
}

.dark-card {
  background: var(--crovia-deep);
  border: 1px solid var(--crovia-border);
  border-radius: var(--crovia-radius);
  padding: 32px;
  color: var(--crovia-text);
}

/* ===== Accordion ===== */
.accordion-item {
  border-bottom: 1px solid #E2E5F0;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  cursor: pointer;
  font-weight: 600;
  color: #1A1F36;
  transition: color 0.25s ease;
}

.accordion-header:hover {
  color: var(--crovia-primary);
}

.accordion-header .accordion-icon {
  transition: transform 0.3s ease;
  color: var(--crovia-primary);
}

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

.accordion-content {
  display: none;
  padding-bottom: 20px;
  color: #4A5170;
  line-height: 1.7;
}

/* ===== Cookie Banner ===== */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--crovia-void);
  border-top: 2px solid var(--crovia-primary);
  padding: 20px;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.4);
}

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

.cookie-banner p {
  color: #C4CAE0;
}

.cookie-banner a {
  color: #6FD9F5;
  text-decoration: underline;
}

.cookie-banner a:hover {
  color: var(--crovia-electric);
}

/* ===== Hero / Section Backgrounds ===== */
.hero-grid-bg {
  background-color: var(--crovia-void);
  background-image:
    linear-gradient(rgba(108, 79, 246, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(108, 79, 246, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  position: relative;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  pointer-events: none;
}

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

.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--crovia-border), transparent);
}

/* ===== Badge ===== */
.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(108, 79, 246, 0.1);
  color: var(--crovia-primary);
  border: 1px solid rgba(108, 79, 246, 0.3);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge-popular {
  background: var(--crovia-lime);
  color: #1A1F36;
  padding: 6px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===== Loading Spinner ===== */
.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid rgba(108, 79, 246, 0.2);
  border-top-color: var(--crovia-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== Fade / Slide Animations ===== */
.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

@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% { box-shadow: 0 0 0 0 rgba(0, 232, 198, 0.5); }
  50% { box-shadow: 0 0 0 10px rgba(0, 232, 198, 0); }
}

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

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

.site-footer a {
  color: var(--crovia-text-dim);
  transition: color 0.25s ease;
}

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

.footer-social {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--crovia-surface);
  border-radius: 50%;
  color: var(--crovia-text-dim);
  transition: all 0.3s ease;
}

.footer-social:hover {
  background: var(--crovia-primary);
  color: #ffffff;
  transform: translateY(-4px);
}

/* ===== Timeline (About page) ===== */
.timeline-item {
  position: relative;
  padding-left: 40px;
  border-left: 2px solid var(--crovia-border);
  padding-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 0;
  width: 16px;
  height: 16px;
  background: var(--crovia-electric);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 232, 198, 0.2);
}

/* ===== Utility ===== */
.text-balance {
  text-wrap: balance;
}

.no-select {
  cursor: default;
  user-select: none;
}

@media (max-width: 768px) {
  .form-card {
    padding: 24px;
  }
  .tech-card {
    padding: 24px;
  }
}