/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-deep:       #080c14;
  --bg-card:       rgba(255,255,255,0.04);
  --bg-card-hover: rgba(255,255,255,0.07);
  --border:        rgba(255,255,255,0.08);
  --border-glow:   rgba(99,179,237,0.3);

  --accent-blue:   #63b3ed;
  --accent-cyan:   #4fd1c5;
  --accent-purple: #9f7aea;
  --accent-gold:   #f6c90e;
  --accent-green:  #68d391;

  --text-primary:  #f0f4ff;
  --text-secondary:#94a3b8;
  --text-muted:    #4a5568;

  --font-display:  'Outfit', sans-serif;
  --font-body:     'Inter', sans-serif;

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  32px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(99,179,237,0.15);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.6;
}

/* ===== ANIMATED BG PARTICLES ===== */
.bg-particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,179,237,0.3), transparent 70%);
  animation: floatParticle var(--dur) ease-in-out infinite alternate;
  opacity: 0;
  animation-delay: var(--delay);
}

@keyframes floatParticle {
  0%   { transform: translateY(0) scale(1); opacity: 0.15; }
  100% { transform: translateY(-80px) scale(1.3); opacity: 0.4; }
}

/* ===== GRID OVERLAY ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,179,237,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,179,237,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 2rem;
  height: 64px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(8, 12, 20, 0.7);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}
.logo-icon { font-size: 1.4rem; }
.logo-accent { color: var(--accent-blue); }
.nav-badge {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent-cyan);
  background: rgba(79, 209, 197, 0.1);
  border: 1px solid rgba(79, 209, 197, 0.25);
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

/* ===== CONTAINER ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  z-index: 1;
  padding: 160px 2rem 80px;
  text-align: center;
  overflow: hidden;
}
.hero-content { position: relative; z-index: 2; }
.hero-glow {
  position: absolute;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99,179,237,0.12) 0%, transparent 70%);
  pointer-events: none;
  animation: pulseGlow 4s ease-in-out infinite;
}
@keyframes pulseGlow {
  0%, 100% { transform: translate(-50%,-50%) scale(1); opacity: 0.8; }
  50%       { transform: translate(-50%,-50%) scale(1.15); opacity: 1; }
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(79,209,197,0.08);
  border: 1px solid rgba(79,209,197,0.2);
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}
.gradient-text {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
  line-height: 1.7;
}

/* ===== COUNTRY SELECTOR ===== */
.country-selector {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.country-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s ease;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}
.country-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,179,237,0.1), rgba(159,122,234,0.1));
  opacity: 0;
  transition: opacity 0.25s;
}
.country-btn:hover::before,
.country-btn.active::before { opacity: 1; }
.country-btn:hover,
.country-btn.active {
  border-color: var(--accent-blue);
  color: var(--text-primary);
  box-shadow: 0 0 20px rgba(99,179,237,0.2);
  transform: translateY(-2px);
}
.flag-img {
  width: 26px;
  height: auto;
  border-radius: 3px;
  display: block;
  flex-shrink: 0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}
.country-btn .cname { position: relative; z-index: 1; }

/* ===== STATS SECTION ===== */
.stats-section {
  position: relative;
  z-index: 1;
  padding: 0 0 3rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: default;
}
.stat-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99,179,237,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.stat-glow {
  position: absolute;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(99,179,237,0.15), transparent 70%);
  right: -20px;
  top: -20px;
  pointer-events: none;
}
.stat-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99,179,237,0.1);
  border-radius: 12px;
  border: 1px solid rgba(99,179,237,0.15);
}
.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.stat-value {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  transition: all 0.4s ease;
}
.stat-unit {
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* ===== CHART SECTION ===== */
.chart-section {
  position: relative;
  z-index: 1;
  padding: 0 0 3rem;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(16px);
  transition: border-color 0.3s;
}
.chart-card:hover { border-color: rgba(99,179,237,0.2); }

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.chart-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.chart-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.chart-controls { display: flex; gap: 6px; }

.range-btn {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}
.range-btn:hover,
.range-btn.active {
  background: rgba(99,179,237,0.15);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.chart-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 5rem 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.chart-wrapper {
  position: relative;
  height: 360px;
}

/* ===== DETAIL SECTION ===== */
.detail-section {
  position: relative;
  z-index: 1;
  padding: 0 0 3rem;
}
.detail-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  backdrop-filter: blur(16px);
  flex-wrap: wrap;
  transition: all 0.3s;
}
.detail-card:hover {
  border-color: rgba(99,179,237,0.25);
  box-shadow: var(--shadow-glow);
}
.detail-flag { font-size: 4rem; flex-shrink: 0; }
.detail-info { flex: 1; min-width: 200px; }
.detail-country {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.detail-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.detail-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}
.dstat { display: flex; flex-direction: column; gap: 4px; }
.dstat-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.dstat-val {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

/* ===== FOOTER ===== */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-logo {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-copy a {
  color: var(--accent-blue);
  text-decoration: none;
}
.footer-copy a:hover { text-decoration: underline; }

/* ===== ENTRANCE ANIMATIONS ===== */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero { padding: 120px 1rem 60px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .chart-header { flex-direction: column; }
  .detail-card { flex-direction: column; text-align: center; }
  .detail-stats { justify-content: center; }
  .footer-inner { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .country-selector { flex-direction: column; align-items: center; }
}