/* ============================================================
   LUCKY NAKOLA PORTFOLIO — Design System & Component Library
   Architecture: CSS Custom Properties + Tailwind Utilities
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Backgrounds */
  --bg-base: #030712;
  --bg-surface: #0f172a;
  --bg-elevated: #1e293b;
  --bg-overlay: rgba(3, 7, 18, 0.85);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Accents */
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --accent-dark: #0891b2;
  --gold: #eab308;
  --gold-light: #facc15;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #06b6d4, #8b5cf6);
  --gradient-hero: linear-gradient(135deg, #030712 0%, #0f172a 50%, #1e1b4b 100%);
  --gradient-card: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(139, 92, 246, 0.08));
  --gradient-gold: linear-gradient(135deg, #eab308, #f59e0b);

  /* Borders */
  --border-subtle: rgba(148, 163, 184, 0.08);
  --border-accent: rgba(6, 182, 212, 0.3);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.15);
  --shadow-gold: 0 0 30px rgba(234, 179, 8, 0.15);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --duration-slow: 500ms;
  --duration-enter: 800ms;
}

/* --- Base Reset & Globals --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 5rem;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Page load transition */
body.loading {
  overflow: hidden;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.font-mono {
  font-family: 'JetBrains Mono', monospace;
}

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

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

/* --- Page Loader --- */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s var(--ease-out), visibility 0.5s;
}

.page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out);
}

.navbar.scrolled {
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  box-shadow: 0 1px 0 var(--border-subtle);
}

.nav-link {
  position: relative;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--duration-base) var(--ease-out);
  padding: 0.25rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width var(--duration-base) var(--ease-out);
}

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

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

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(3, 7, 18, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow);
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu .nav-link {
  display: block;
  font-size: 1.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  padding: 0.75rem 0;
  opacity: 0;
  transform: translateY(20px);
  transition: color var(--duration-base),
              opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.mobile-menu.open .nav-link {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger mobile links */
.mobile-menu .nav-link:nth-child(1) { transition-delay: 100ms; }
.mobile-menu .nav-link:nth-child(2) { transition-delay: 150ms; }
.mobile-menu .nav-link:nth-child(3) { transition-delay: 200ms; }
.mobile-menu .nav-link:nth-child(4) { transition-delay: 250ms; }
.mobile-menu .nav-link:nth-child(5) { transition-delay: 300ms; }
.mobile-menu .nav-link:nth-child(6) { transition-delay: 350ms; }
.mobile-menu .nav-link:nth-child(7) { transition-delay: 400ms; }

/* Hamburger */
.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base);
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: none;
  border-radius: 9999px;
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  padding: 0.75rem 2rem;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  padding: 0.75rem 2rem;
  border: 1px solid var(--border-accent);
}

.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--gradient-gold);
  color: var(--bg-base);
  padding: 0.75rem 2rem;
  box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(234, 179, 8, 0.35);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- Cards --- */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0), rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0));
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--border-accent);
}

.card:hover::before {
  opacity: 1;
}

/* Project card image */
.card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: 0.5rem;
  transition: transform var(--duration-slow) var(--ease-out);
}

.card:hover .card-image {
  transform: scale(1.03);
}

/* --- Badge / Tag --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-light);
  border: 1px solid rgba(6, 182, 212, 0.15);
  letter-spacing: 0.02em;
}

.badge-gold {
  background: rgba(234, 179, 8, 0.1);
  color: var(--gold-light);
  border-color: rgba(234, 179, 8, 0.15);
}

.badge-violet {
  background: rgba(139, 92, 246, 0.1);
  color: #a78bfa;
  border-color: rgba(139, 92, 246, 0.15);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.1);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.15);
}

/* --- Timeline --- */
.timeline-line {
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border-subtle));
}

.timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-base);
  border: 2px solid var(--accent);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: all var(--duration-base) var(--ease-out);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.4);
}

/* --- Form Elements --- */
.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: 0.75rem;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.9375rem;
  transition: border-color var(--duration-base), box-shadow var(--duration-base);
  outline: none;
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.form-input:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

/* --- Section Utilities --- */
.section-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-label::before {
  content: '';
  width: 2rem;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

/* --- Hero Specific --- */
.hero-gradient {
  background: var(--gradient-hero);
  position: relative;
}

.hero-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(6, 182, 212, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 50%, rgba(139, 92, 246, 0.08), transparent);
  pointer-events: none;
}

/* Grid pattern overlay */
.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
  pointer-events: none;
}

/* Floating orbs decoration */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  pointer-events: none;
  animation: float 8s ease-in-out infinite;
}

.orb-cyan {
  background: #06b6d4;
}

.orb-violet {
  background: #8b5cf6;
  animation-delay: -4s;
  animation-duration: 10s;
}

.orb-gold {
  background: #eab308;
  animation-delay: -2s;
  animation-duration: 12s;
}

/* Typing cursor */
.typing-cursor {
  display: inline-block;
  width: 3px;
  height: 1em;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
}

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-enter) var(--ease-out),
              transform var(--duration-enter) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--duration-enter) var(--ease-out),
              transform var(--duration-enter) var(--ease-out);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--duration-enter) var(--ease-out),
              transform var(--duration-enter) var(--ease-out);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--duration-enter) var(--ease-out),
              transform var(--duration-enter) var(--ease-out);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(2) { transition-delay: 80ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(3) { transition-delay: 160ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(4) { transition-delay: 240ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(5) { transition-delay: 320ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(6) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(7) { transition-delay: 480ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(8) { transition-delay: 560ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(9) { transition-delay: 640ms; opacity: 1; transform: translateY(0); }
.stagger-children.visible > *:nth-child(10) { transition-delay: 720ms; opacity: 1; transform: translateY(0); }

/* --- Skill Bar Animation --- */
.skill-progress {
  height: 4px;
  background: var(--border-subtle);
  border-radius: 2px;
  overflow: hidden;
}

.skill-progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 2px;
  width: 0;
  transition: width 1.2s var(--ease-out);
}

.skill-progress-bar.animate {
  width: var(--progress);
}

/* --- Scroll-to-Top --- */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--duration-base) var(--ease-out);
  z-index: 50;
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

/* --- Footer --- */
.footer-gradient {
  background: linear-gradient(to top, var(--bg-base), var(--bg-surface));
}

/* --- Keyframes --- */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes blink {
  50% { opacity: 0; }
}

@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); }
  25% { transform: translateY(-15px) translateX(10px); }
  50% { transform: translateY(-5px) translateX(-5px); }
  75% { transform: translateY(-20px) translateX(5px); }
}

@keyframes pulse-ring {
  0% { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes scroll-indicator {
  0%, 20% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* --- Filter Buttons (Projects) --- */
.filter-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: 9999px;
  border: 1px solid var(--border-subtle);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
}

.filter-btn:hover {
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
}

/* --- Project Card Hover Overlay --- */
.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(3, 7, 18, 0.9) 0%, transparent 60%);
  border-radius: 0.5rem;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  display: flex;
  align-items: flex-end;
  padding: 1rem;
}

.card:hover .project-overlay {
  opacity: 1;
}

/* --- Stat Counter --- */
.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1;
}

/* --- Print Styles --- */
@media print {
  .navbar, .mobile-menu, .scroll-top-btn, .page-loader, .no-print {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .card {
    border: 1px solid #ddd;
    break-inside: avoid;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1;
    transform: none;
  }

  .stagger-children > * {
    opacity: 1;
    transform: none;
  }
}

/* --- Selection --- */
::selection {
  background: rgba(6, 182, 212, 0.3);
  color: #fff;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Focus Visible --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- Smooth image loading --- */
img {
  max-width: 100%;
  height: auto;
}

img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}

img[loading="lazy"].loaded,
img:not([loading="lazy"]) {
  opacity: 1;
}

/* ===========================
   Services Page
   =========================== */

/* Service Tabs */
.svc-tab {
  padding: 0.5rem 1.25rem;
  border-radius: 9999px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}
.svc-tab:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.03);
}
.svc-tab.active {
  color: var(--accent);
  background: rgba(6,182,212,0.08);
  border-color: rgba(6,182,212,0.25);
}

/* Service Panels */
.svc-panel { display: none; }
.svc-panel.active { display: block; animation: fadeUp 0.4s var(--ease-out) both; }

/* Estimator Option Buttons */
.est-option,
.est-complexity,
.est-urgency {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.875rem 0.5rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
}
.est-option:hover,
.est-complexity:hover,
.est-urgency:hover {
  border-color: rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
}
.est-option.active,
.est-complexity.active,
.est-urgency.active {
  border-color: var(--accent);
  background: rgba(6,182,212,0.08);
  box-shadow: 0 0 20px rgba(6,182,212,0.1);
}

/* Estimator Checkboxes */
.est-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  border-radius: 0.5rem;
  border: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}
.est-check:hover { border-color: rgba(255,255,255,0.12); }
.est-check:has(input:checked) {
  border-color: var(--accent);
  background: rgba(6,182,212,0.06);
  color: var(--text-primary);
}
.est-check input {
  accent-color: var(--accent);
  width: 1rem;
  height: 1rem;
}

/* Range slider styling */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--bg-card);
  border-radius: 3px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(6,182,212,0.4);
}
input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(6,182,212,0.4);
}

/* Details/Summary (FAQ) */
details summary::-webkit-details-marker { display: none; }