/* ============================================================
   World Map Projections — Design System
   Inspired by SOUNNY PRJ
   ============================================================ */

:root {
  /* Color Palette - Cyber / Deep Sea Theme */
  --clr-bg:          #06080f;
  --clr-bg-2:        #0a0d17;
  --clr-surface:     #111625;
  --clr-surface-2:   #1a2035;
  --clr-border:      rgba(76, 201, 240, 0.12);
  --clr-border-hover:rgba(76, 201, 240, 0.35);

  --clr-accent:      #4cc9f0; /* Electric Blue */
  --clr-accent-2:    #7209b7; /* Royal Purple */
  --clr-accent-3:    #f72585; /* Neon Pink */
  --clr-accent-glow: rgba(76, 201, 240, 0.25);

  --clr-text:        #e0e6f0;
  --clr-text-2:      #94a3b8;
  --clr-text-3:      #64748b;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing / Shapes */
  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 32px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur:  300ms;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: var(--clr-accent); text-decoration: none; transition: all var(--dur) var(--ease); }
a:hover { color: #fff; text-shadow: 0 0 10px var(--clr-accent-glow); }

code {
  font-family: var(--font-mono);
  background: var(--clr-surface-2);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(6, 8, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
  height: 70px;
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: #fff;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-2));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 0 20px var(--clr-accent-glow);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-2);
}

.nav-link:hover, .nav-link.active {
  color: var(--clr-accent);
}

/* --- Hero --- */
.hero {
  padding: 160px 0 100px;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 60%;
  background: radial-gradient(circle, rgba(76, 201, 240, 0.15) 0%, transparent 70%);
  filter: blur(60px);
  z-index: -1;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
  background: linear-gradient(to right, #fff, var(--clr-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--clr-text-2);
  max-width: 700px;
  margin: 0 auto 48px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.btn {
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-primary {
  background: var(--clr-accent);
  color: #000;
  border: none;
}

.btn-primary:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--clr-accent-glow);
  color: #000;
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border: 1px solid var(--clr-border);
}

.btn-secondary:hover {
  background: var(--clr-surface-2);
  border-color: var(--clr-accent);
}

/* --- Features / Options --- */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  padding: 80px 0;
}

.option-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  transition: all var(--dur) var(--ease);
  position: relative;
  overflow: hidden;
}

.option-card:hover {
  transform: translateY(-8px);
  border-color: var(--clr-accent);
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.option-icon {
  font-size: 2.5rem;
  margin-bottom: 24px;
  display: block;
}

.option-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.option-desc {
  color: var(--clr-text-2);
  margin-bottom: 32px;
  font-size: 1rem;
}

/* --- Footer --- */
.footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--clr-border);
  text-align: center;
}

.footer-text {
  color: var(--clr-text-3);
  font-size: 0.9rem;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade {
  animation: fadeIn 0.8s var(--ease) forwards;
}

/* --- Custom Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--clr-bg); 
}
::-webkit-scrollbar-thumb {
  background: var(--clr-surface-2); 
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--clr-text-3); 
}

/* --- Custom Range Sliders --- */
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: var(--clr-accent);
  cursor: pointer;
  margin-top: -6px;
  box-shadow: 0 0 10px var(--clr-accent-glow);
}
input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  background: var(--clr-surface-2);
  border-radius: 2px;
}