:root {
  --navy-dark: #0b1329;
  --navy-card: #111c38;
  --navy-accent: #1d4ed8;
  --navy-hover: #2563eb;
  
  --bg-page: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  
  --ice-blue: #f0f9ff;
  --ice-border: #bae6fd;
  
  --radius-lg: 16px;
  --radius-md: 10px;
}

* { 
  box-sizing: border-box; 
}

body {
  margin: 0;
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  padding-bottom: 60px;
}

/* Top Navigation */
.navbar {
  background: var(--navy-dark);
  padding: 18px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 20px;
  color: #fff;
  text-decoration: none;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: var(--navy-accent);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(29, 78, 216, 0.4);
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-links a:hover { 
  color: #ffffff; 
}

/* Mobile Menu Toggle Button */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 22px;
  padding: 4px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  line-height: 1;
  transition: background 0.2s;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Breadcrumbs */
.breadcrumb-wrapper {
  max-width: 1100px;
  margin: 20px auto 0;
  padding: 0 20px;
}

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  align-items: center;
}

.breadcrumb a {
  color: var(--navy-accent);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb a:hover { 
  text-decoration: underline; 
}

/* Hero Header */
.hero {
  background: linear-gradient(180deg, var(--navy-dark) 0%, #152347 100%);
  color: #fff;
  padding: 40px 20px 60px;
  text-align: center;
  margin-top: 15px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
}

.hero p {
  color: #94a3b8;
  max-width: 650px;
  margin: 0 auto;
  font-size: 15px;
}

/* Search & Countries Section */
.container {
  max-width: 1100px;
  margin: -30px auto 0;
  padding: 0 20px;
}

.search-box {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  box-shadow: 0 10px 25px rgba(11, 19, 41, 0.06);
  border: 1px solid var(--border-color);
  margin-bottom: 35px;
}

.search-box input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 15px;
  outline: none;
  transition: all 0.2s;
}

.search-box input:focus {
  border-color: var(--navy-accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
}

.countries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.country-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  color: var(--navy-dark);
  font-weight: 700;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.02);
}

.country-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(11, 19, 41, 0.08);
  border-color: var(--navy-accent);
  color: var(--navy-accent);
}

.country-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.country-code {
  background: var(--ice-blue);
  color: var(--navy-accent);
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--ice-border);
  font-weight: 800;
}

.arrow-icon {
  color: var(--text-muted);
  font-size: 14px;
  transition: transform 0.2s;
}

.country-card:hover .arrow-icon {
  transform: translateX(3px);
  color: var(--navy-accent);
}

/* Footer */
footer {
  margin-top: 60px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
}

/* Mobile Responsive Rules */
@media (max-width: 768px) {
  .navbar {
    padding: 16px 20px;
  }
  .menu-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--navy-dark);
    flex-direction: column;
    padding: 16px 20px;
    gap: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    z-index: 1000;
  }
  .nav-links.active {
    display: flex;
  }
  .nav-links a {
    width: 100%;
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }
  .nav-links a:last-child {
    border-bottom: none;
  }
}