@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 {
  --quantum-violet: #6C3CE9;
  --quantum-violet-dark: #4B24AD;
  --quantum-violet-light: #9B7BF2;
  --cyber-lime: #C6FF3D;
  --plasma-pink: #FF3D8A;
  --deep-space: #0D0E1A;
  --deep-space-light: #161829;
  --slate-mist: #2A2D45;
  --frost: #EDEFFB;
  --frost-dim: #B8BCD9;
  --gradient-primary: linear-gradient(135deg, var(--quantum-violet) 0%, var(--plasma-pink) 100%);
  --gradient-dark: linear-gradient(180deg, var(--deep-space) 0%, var(--deep-space-light) 100%);
  --shadow-glow: 0 0 40px rgba(108, 60, 233, 0.35);
  --shadow-lime: 0 0 30px rgba(198, 255, 61, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--frost);
  background-color: var(--deep-space);
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--deep-space);
}
::-webkit-scrollbar-thumb {
  background: var(--quantum-violet);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--plasma-pink);
}

/* Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background-color: var(--deep-space);
  border-bottom: 1px solid var(--slate-mist);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease;
}

.logo-glow {
  filter: drop-shadow(0 0 8px rgba(108, 60, 233, 0.6));
  transition: filter 0.3s ease;
}
.logo-glow:hover {
  filter: drop-shadow(0 0 16px rgba(198, 255, 61, 0.7));
}

.nav-link {
  position: relative;
  color: var(--frost-dim);
  font-weight: 500;
  transition: color 0.25s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}
.nav-link:hover {
  color: var(--frost);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link.active {
  color: var(--cyber-lime);
}

/* Mobile menu */
.mobile-menu-toggle {
  color: var(--frost);
  font-size: 1.75rem;
  cursor: pointer;
}

.mobile-menu {
  background-color: var(--deep-space-light);
  border-top: 1px solid var(--slate-mist);
}
.mobile-menu a {
  color: var(--frost-dim);
  border-bottom: 1px solid var(--slate-mist);
}
.mobile-menu a:hover {
  color: var(--cyber-lime);
  background-color: rgba(108, 60, 233, 0.08);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: none;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(108, 60, 233, 0.4);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(108, 60, 233, 0.6);
}

.btn-accent {
  background-color: var(--cyber-lime);
  color: var(--deep-space);
  box-shadow: var(--shadow-lime);
}
.btn-accent:hover {
  transform: translateY(-3px) scale(1.02);
  background-color: #d4ff6b;
}

.btn-outline {
  background: transparent;
  color: var(--frost);
  border: 2px solid var(--quantum-violet-light);
}
.btn-outline:hover {
  background-color: rgba(108, 60, 233, 0.15);
  border-color: var(--cyber-lime);
  color: var(--cyber-lime);
}

/* Forms */
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background-color: var(--deep-space-light);
  border: 1.5px solid var(--slate-mist);
  border-radius: 8px;
  color: var(--frost);
  transition: all 0.25s ease;
}
.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--frost-dim);
  opacity: 0.6;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--quantum-violet-light);
  box-shadow: 0 0 0 3px rgba(108, 60, 233, 0.25);
  background-color: var(--deep-space);
}
.form-label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  color: var(--frost);
  font-size: 0.9rem;
}

form.tech-form {
  background-color: var(--deep-space-light);
  border: 1px solid var(--slate-mist);
  border-radius: 16px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}
form.tech-form::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(108, 60, 233, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

/* Cards */
.tech-card {
  background-color: var(--deep-space-light);
  border: 1px solid var(--slate-mist);
  border-radius: 14px;
  padding: 2rem;
  transition: all 0.35s ease;
  position: relative;
}
.tech-card:hover {
  transform: translateY(-6px);
  border-color: var(--quantum-violet-light);
  box-shadow: var(--shadow-glow);
}
.tech-card .icon-box {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 1.2rem;
}

.card-static {
  background-color: var(--deep-space-light);
  border: 1px solid var(--slate-mist);
  border-radius: 14px;
  padding: 2rem;
  cursor: default;
}
.card-static.featured {
  border: 2px solid var(--cyber-lime);
  box-shadow: var(--shadow-lime);
}

/* Accordion */
.accordion-item {
  border-bottom: 1px solid var(--slate-mist);
}
.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.3rem 0.5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--frost);
  transition: color 0.25s ease;
}
.accordion-header:hover {
  color: var(--cyber-lime);
}
.accordion-header .accordion-icon {
  transition: transform 0.3s ease;
  color: var(--quantum-violet-light);
}
.accordion-header.active .accordion-icon {
  transform: rotate(180deg);
}
.accordion-content {
  display: none;
  padding: 0 0.5rem 1.3rem;
  color: var(--frost-dim);
  line-height: 1.7;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--deep-space-light);
  border-top: 2px solid var(--quantum-violet);
  padding: 1.5rem;
  z-index: 1000;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.5);
}
.cookie-banner h3 {
  color: #ffffff;
}
.cookie-banner p {
  color: var(--frost-dim);
}
.cookie-banner a {
  color: var(--cyber-lime);
  text-decoration: underline;
}

/* Hero / gradient sections */
.hero-gradient {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}
.hero-gradient::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(108, 60, 233, 0.25) 0%, transparent 70%);
  pointer-events: none;
}
.hero-gradient::after {
  content: '';
  position: absolute;
  bottom: -30%;
  right: -10%;
  width: 50%;
  height: 60%;
  background: radial-gradient(circle, rgba(198, 255, 61, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

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

/* Section styling */
.section-alt {
  background-color: var(--deep-space-light);
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: rgba(108, 60, 233, 0.15);
  color: var(--quantum-violet-light);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid rgba(108, 60, 233, 0.3);
}

.badge-featured {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background-color: var(--cyber-lime);
  color: var(--deep-space);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
}

/* Loading spinner */
.spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--slate-mist);
  border-top-color: var(--cyber-lime);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

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

.opacity-0 {
  opacity: 0;
}
.transition-opacity {
  transition: opacity 0.5s ease;
}

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

/* Timeline (about page) */
.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  border-left: 2px solid var(--slate-mist);
  padding-bottom: 2rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyber-lime);
  box-shadow: 0 0 10px rgba(198, 255, 61, 0.6);
}

/* Footer */
.site-footer {
  background-color: var(--deep-space-light);
  border-top: 1px solid var(--slate-mist);
  color: var(--frost-dim);
}
.site-footer h4 {
  color: #ffffff;
}
.site-footer a {
  color: var(--frost-dim);
  transition: color 0.25s ease;
}
.site-footer a:hover {
  color: var(--cyber-lime);
}

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

@media (max-width: 768px) {
  form.tech-form {
    padding: 1.5rem;
  }
  .tech-card {
    padding: 1.5rem;
  }
}