:root {
    --bg-page: #ffffff;
    --text-main: #0f172a;
    --text-muted: #5b657a;
    --card-bg: #f5f5f7;
    --card-hover: #ececf0;
    --accent: #111b2e;
    --focus-outline: 0 0 0 3px rgba(17, 27, 46, 0.25);
    --transition: 200ms ease;
    font-family: 'Space Grotesk', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-page);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    padding: 2.5rem clamp(1rem, 4vw, 4rem) 3rem;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 1rem;
    background: var(--accent);
    color: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    text-decoration: none;
    transition: top var(--transition);
    font-weight: 600;
    z-index: 10;
}

.skip-link:focus {
    top: 1rem;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 0;
}

.selector-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: clamp(1rem, 3vw, 1.75rem);
    list-style: none;
    padding: 0;
    margin: 0;
}

.country-card {
    background: var(--card-bg);
    border-radius: 1.5rem;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform var(--transition), background var(--transition), box-shadow var(--transition);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.country-card:hover,
.country-card:focus-visible {
    transform: translateY(-4px);
    background: var(--card-hover);
    outline: none;
    box-shadow: 0 20px 36px rgba(15, 23, 42, 0.08);
}

.country-card:focus-visible {
    box-shadow: var(--focus-outline);
}

.country-card.is-highlighted {
    box-shadow: 0 0 0 3px rgba(17, 27, 46, 0.2), 0 25px 45px rgba(15, 23, 42, 0.15);
}

.country-flag img {
    width: 100%;
    height: 160px;
    border-radius: 1.1rem;
    object-fit: cover;
    display: block;
    background: #ffffff;
}

.country-info {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.country-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

.cta-text {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    margin: 0 0.3rem;
    transition: color var(--transition);
}

footer a:hover,
footer a:focus-visible {
    color: #5d6c98;
    outline: none;
}

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

@media (max-width: 640px) {
    body {
        padding: 1.5rem 1rem 2.5rem;
    }

    header h1 {
        font-size: 1.6rem;
    }
}