/* Main Styles */
:root {
    /* Light Mode */
    --light-bg: hsl(0, 0%, 98%);
    --light-elements: hsl(0, 0%, 100%);
    --light-text: hsl(200, 15%, 8%);
    --light-input: hsl(0, 0%, 52%);

    /* Dark Mode */
    --dark-bg: hsl(207, 26%, 17%);
    --dark-elements: hsl(209, 23%, 22%);
    --dark-text: hsl(0, 0%, 100%);

    /* Font */
    --font-family: 'Nunito Sans', sans-serif;
    --fw-light: 300;
    --fw-semi-bold: 600;
    --fw-extra-bold: 800;
}

body {
    font-family: var(--font-family);
    background-color: var(--light-bg);
    color: var(--light-text);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

/* Dark Mode */
body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

body.dark-mode nav,
body.dark-mode .card,
body.dark-mode .search-container,
body.dark-mode .filter-container,
body.dark-mode .back-button,
body.dark-mode .border-button {
    background-color: var(--dark-elements);
    color: var(--dark-text);
}

body.dark-mode input,
body.dark-mode select {
    background-color: var(--dark-elements);
    color: var(--dark-text);
}

body.dark-mode input::placeholder {
    color: var(--dark-text);
    opacity: 0.7;
}

/* Navigation */
nav {
    background-color: var(--light-elements);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s;
}

nav h1 {
    font-weight: var(--fw-extra-bold);
    font-size: 1.5rem;
}

.dark-mode-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
    font-weight: var(--fw-semi-bold);
    gap: 0.5rem;
}

/* Search and Filter */
.search-container {
    background-color: var(--light-elements);
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s;
}

.search-container input {
    background-color: transparent;
    color: var(--light-text);
    border: none;
    outline: none;
    width: 100%;
    padding: 0.75rem;
    font-size: 0.875rem;
    font-family: var(--font-family);
    font-weight: var(--fw-light);
}

.filter-container {
    background-color: var(--light-elements);
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s;
}

.filter-container select {
    border: none;
    background-color: transparent;
    color: var(--light-text);
    padding: 0.75rem;
    font-size: 0.875rem;
    font-weight: var(--fw-light);
    font-family: var(--font-family);
    width: 100%;
    cursor: pointer;
    outline: none;
    appearance: none;
}

/* Country Cards */
.country-card {
    background-color: var(--light-elements);
    border-radius: 5px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s;
    height: 100%;
    cursor: pointer;
}

.country-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-img {
    height: 160px;
    object-fit: cover;
    width: 100%;
}

.card-content {
    padding: 1.5rem;
}

.card-content h2 {
    font-size: 1.125rem;
    font-weight: var(--fw-extra-bold);
    margin-top: 0;
    margin-bottom: 1rem;
}

.card-content p {
    margin: 0.3rem 0;
    font-size: 0.875rem;
}

.card-content span.label {
    font-weight: var(--fw-semi-bold);
}

/* Country Detail */
.back-button {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.5rem;
    background-color: var(--light-elements);
    border: none;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.875rem;
    transition: background-color 0.3s;
    margin-bottom: 4rem;
    gap: 0.5rem;
}

.country-detail-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.country-flag {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: 5px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.country-info h1 {
    font-size: 1.75rem;
    font-weight: var(--fw-extra-bold);
    margin-bottom: 1.5rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.info-item {
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.info-label {
    font-weight: var(--fw-semi-bold);
}

.border-countries {
    margin-top: 2rem;
}

.border-countries-title {
    font-weight: var(--fw-semi-bold);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.border-countries-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
}

.border-button {
    background-color: var(--light-elements);
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 1.5rem;
    border-radius: 2px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.border-button:hover {
    transform: scale(1.05);
}

/* Loading State */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    font-weight: var(--fw-semi-bold);
}

/* Helper Classes */
.hidden {
    display: none !important;
}

/* Media Queries */
@media (min-width: 640px) {
    .detail-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .country-detail-content {
        grid-template-columns: 1fr 1fr;
        gap: 5rem;
        align-items: center;
    }
}

@media (min-width: 1024px) {
    .country-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Hide attribution on print */
@media print {
    .attribution {
        display: none;
    }
}

/* Fix font weights */
h1, h2, h3 {
    font-weight: var(--fw-extra-bold);
}

.attribution {
    font-family: var(--font-family);
    font-size: 11px;
    text-align: center;
    padding: 1.5rem 0;
    background-color: var(--light-elements);
    transition: background-color 0.3s;
}

body.dark-mode .attribution {
    background-color: var(--dark-elements);
}