/* ============================================
   Styles pour les pages Villes du Monde
   PlaneteWeb.fr
   ============================================ */

/* Variables communes */
:root {
    --world-gradient: linear-gradient(135deg, #667eea, #764ba2);
    --world-gradient-light: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
}

/* ============================================
   PAGE INDEX MONDE
   ============================================ */

.world-index-main,
.world-country-main {
    min-height: calc(100vh - 200px);
    padding: 20px 0 60px;
}

/* Breadcrumb pour pages monde */
.world-country-main .breadcrumb,
.world-index-main .breadcrumb {
    margin-bottom: 25px;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    font-size: 0.95em;
    color: #7f8c8d;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.world-country-main .breadcrumb a,
.world-index-main .breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.world-country-main .breadcrumb a:hover,
.world-index-main .breadcrumb a:hover {
    text-decoration: underline;
}

.world-country-main .breadcrumb-separator,
.world-index-main .breadcrumb-separator {
    margin: 0 10px;
    color: #bdc3c7;
}

/* Header monde */
.world-header-banner {
    background: var(--world-gradient);
    border-radius: 25px;
    padding: 50px 40px;
    margin-bottom: 40px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
}

.world-header-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.world-header-content {
    position: relative;
    z-index: 1;
}

.world-title {
    font-size: 2.8em;
    font-weight: 800;
    margin-bottom: 15px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.world-title i {
    margin-right: 15px;
}

.world-subtitle {
    font-size: 1.3em;
    opacity: 0.95;
}

/* Statistiques monde */
.world-stats,
.country-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.2);
}

.stat-card > i {
    font-size: 2.5em;
    color: var(--primary-color);
    background: var(--world-gradient-light);
    padding: 20px;
    border-radius: 50%;
    min-width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.8em;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.95em;
    color: #7f8c8d;
}

/* Recherche mondiale */
.world-search-section {
    margin-bottom: 40px;
}

.world-search-box {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.world-search-box > i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #7f8c8d;
    font-size: 1.2em;
    z-index: 1;
}

.world-search-box input {
    width: 100%;
    padding: 18px 20px 18px 50px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 50px;
    font-size: 1.1em;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.world-search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.2);
}

.world-search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: 15px;
    margin-top: 10px;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.15);
    max-height: 400px;
    overflow-y: auto;
    z-index: 100;
}

.world-search-results.hidden {
    display: none;
}

.search-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    text-decoration: none;
    color: var(--dark-color);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.search-result-item:hover {
    background: var(--world-gradient-light);
}

.search-result-item .city-name {
    font-weight: 600;
}

.search-result-item .country-name {
    font-size: 0.9em;
    color: #7f8c8d;
}

.no-results {
    padding: 20px;
    text-align: center;
    color: #7f8c8d;
}

/* Sections continents */
.continent-section {
    margin-bottom: 50px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-header h2 {
    font-size: 1.8em;
    color: var(--primary-color);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-header h2 i {
    background: var(--world-gradient-light);
    padding: 12px;
    border-radius: 50%;
}

.country-count {
    background: var(--world-gradient);
    color: white;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 600;
}

/* Grille des pays */
.countries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.country-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 18px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: var(--dark-color);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.country-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

.country-flag {
    font-size: 2.5em;
}

.country-info {
    flex: 1;
}

.country-name {
    font-size: 1.15em;
    font-weight: 700;
    color: var(--dark-color);
    margin: 0 0 5px 0;
}

.country-cities {
    font-size: 0.9em;
    color: #7f8c8d;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.country-cities i {
    color: var(--primary-color);
}

.country-arrow {
    color: var(--primary-color);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.country-card:hover .country-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Section SEO monde */
.world-seo-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.world-seo-section .seo-content h2 {
    font-size: 1.5em;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.world-seo-section .seo-content p {
    line-height: 1.8;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.world-seo-section .seo-content strong {
    color: var(--primary-color);
}

/* ============================================
   PAGE PAYS
   ============================================ */

.world-country-main {
    min-height: calc(100vh - 200px);
    padding: 20px 0 60px;
}

.world-container {
    max-width: 1400px;
}

/* Header pays */
.country-header-banner {
    background: var(--world-gradient);
    border-radius: 25px;
    padding: 50px 40px;
    margin-bottom: 40px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
}

.country-header-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.country-header-content {
    position: relative;
    z-index: 1;
}

.country-flag-large {
    font-size: 4em;
    margin-bottom: 15px;
    display: block;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

.country-title,
.country-header-banner h1 {
    font-size: 2.5em;
    font-weight: 800;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    color: white !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: white !important;
    background-clip: unset !important;
}

.country-subtitle {
    font-size: 1.2em;
    opacity: 0.95;
    margin-bottom: 10px;
}

.country-continent {
    font-size: 1em;
    opacity: 0.85;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* Section carte du pays */
.country-map-section {
    margin-bottom: 40px;
}

/* Section SEO pays */
.country-seo-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.country-seo-section .seo-content {
    line-height: 1.8;
    color: var(--dark-color);
}

.country-seo-section .seo-content h2 {
    font-size: 1.5em;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.country-seo-section .seo-content p {
    margin-bottom: 15px;
}

.country-seo-section .seo-content strong {
    color: var(--primary-color);
}

/* Recherche dans le pays */
.country-search-section {
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.country-search-box {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.country-search-box > i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: #7f8c8d;
}

.country-search-box input {
    width: 100%;
    padding: 15px 20px 15px 45px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 50px;
    font-size: 1em;
    background: rgba(255, 255, 255, 0.95);
    transition: all 0.3s ease;
}

.country-search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.15);
}

.search-results-count {
    font-size: 0.95em;
    color: #7f8c8d;
}

/* Section liste des villes */
.country-cities-section {
    margin-bottom: 40px;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sort-controls label {
    font-size: 0.95em;
    color: #7f8c8d;
    display: flex;
    align-items: center;
    gap: 6px;
}

.sort-controls select {
    padding: 8px 15px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 10px;
    font-size: 0.9em;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sort-controls select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Grille des villes mondiales */
.cities-grid-world {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
}

.world-city-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: var(--dark-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.world-city-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

.city-card-icon {
    background: var(--world-gradient-light);
    padding: 12px;
    border-radius: 12px;
    color: var(--primary-color);
    font-size: 1.2em;
}

.city-card-info {
    flex: 1;
}

.city-card-name {
    font-size: 1.05em;
    font-weight: 600;
    margin: 0 0 4px 0;
    color: var(--dark-color);
}

.city-card-population {
    font-size: 0.85em;
    color: #7f8c8d;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 5px;
}

.city-card-population i {
    color: var(--primary-color);
    font-size: 0.9em;
}

.city-card-arrow {
    color: var(--primary-color);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.world-city-card:hover .city-card-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   PAGE VILLE MONDIALE
   ============================================ */

.world-city-page {
    background: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);
}

/* Sidebar ville mondiale */
.city-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Cartes météo communes */
.weather-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.weather-card h2 {
    font-size: 1.2em;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.weather-card h2 i {
    background: var(--world-gradient-light);
    padding: 10px;
    border-radius: 50%;
}

/* Bloc Infos pratiques */
.practical-info-card {
    order: -1;
}

.practical-info-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.info-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(5px);
}

.info-item > i {
    font-size: 1.3em;
    color: var(--primary-color);
    min-width: 30px;
    text-align: center;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.info-label {
    font-size: 0.8em;
    color: #7f8c8d;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1.05em;
    font-weight: 600;
    color: var(--dark-color);
}

.info-value.timezone-small {
    font-size: 0.9em;
    word-break: break-all;
}

.info-value.coords-small {
    font-size: 0.9em;
}

/* Heure locale mise en avant */
#local-time {
    font-size: 1.3em;
    font-weight: 700;
    background: var(--world-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Météo actuelle sidebar */
.current-weather .current-weather-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.current-weather .current-temp {
    display: flex;
    align-items: flex-start;
}

.current-weather .temp-value {
    font-size: 3em;
    font-weight: 800;
    background: var(--world-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.current-weather .temp-unit {
    font-size: 1.5em;
    color: var(--primary-color);
}

.current-weather .current-icon {
    font-size: 3em;
    color: var(--primary-color);
}

.current-weather .weather-description {
    text-align: center;
    color: var(--dark-color);
    font-size: 1.1em;
    text-transform: capitalize;
    margin-bottom: 20px;
}

.current-weather .weather-details {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-top: 15px;
    border-top: 1px solid rgba(102, 126, 234, 0.15);
}

.current-weather .detail-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95em;
    color: var(--dark-color);
}

.current-weather .detail-item i {
    color: var(--primary-color);
    min-width: 20px;
}

/* Qualité de l'air sidebar */
.air-quality .aqi-display {
    text-align: center;
    padding: 20px;
    border-radius: 15px;
    color: white;
}

.air-quality .aqi-display.aqi-good {
    background: linear-gradient(135deg, #4CAF50, #45a049);
}

.air-quality .aqi-display.aqi-fair {
    background: linear-gradient(135deg, #8BC34A, #7CB342);
}

.air-quality .aqi-display.aqi-moderate {
    background: linear-gradient(135deg, #FFC107, #FFB300);
}

.air-quality .aqi-display.aqi-poor {
    background: linear-gradient(135deg, #FF9800, #F57C00);
}

.air-quality .aqi-display.aqi-very-poor {
    background: linear-gradient(135deg, #F44336, #D32F2F);
}

.air-quality .aqi-value {
    font-size: 2.5em;
    font-weight: 800;
    display: block;
}

.air-quality .aqi-label {
    font-size: 1.1em;
    font-weight: 600;
}

/* Header ville mondiale */
.city-header {
    margin-bottom: 30px;
}

.city-header-content {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.country-flag-header {
    font-size: 2.5em;
}

.city-header h1 {
    font-size: 2.2em;
    color: var(--primary-color);
    margin: 0;
    font-weight: 800;
}

.city-location {
    width: 100%;
    color: #7f8c8d;
    font-size: 1.1em;
    margin: 10px 0 0 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.city-location i {
    color: var(--primary-color);
}

/* Prévisions 5 jours */
.forecast-section {
    margin-bottom: 30px;
}

.forecast-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
}

.forecast-day {
    background: var(--world-gradient-light);
    border-radius: 15px;
    padding: 20px 15px;
    text-align: center;
    transition: all 0.3s ease;
}

.forecast-day:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.2);
}

.forecast-date {
    margin-bottom: 15px;
}

.forecast-date .day-name {
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.forecast-date .day-num {
    font-size: 0.85em;
    color: #7f8c8d;
}

.forecast-icon {
    font-size: 2.5em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.forecast-temps {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.forecast-temps .temp-high {
    font-weight: 700;
    color: var(--dark-color);
}

.forecast-temps .temp-low {
    color: #7f8c8d;
}

.forecast-desc {
    font-size: 0.85em;
    color: #7f8c8d;
    text-transform: capitalize;
}

/* Carte */
.map-section {
    margin-bottom: 30px;
}

.city-map {
    height: 350px;
    border-radius: 15px;
    overflow: hidden;
}

/* Contenu SEO ville mondiale */
.seo-section {
    margin-bottom: 30px;
}

.seo-section .seo-content {
    line-height: 1.8;
    color: var(--dark-color);
}

.seo-section .seo-content h2 {
    font-size: 1.4em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.seo-section .seo-content p {
    margin-bottom: 12px;
}

.seo-section .seo-content strong {
    color: var(--primary-color);
}

/* Lien retour */
.back-link-section {
    text-align: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    background: var(--world-gradient);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
}

.back-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
}

/* Bouton retour en haut */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--world-gradient);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.3);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.4);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .city-layout {
        grid-template-columns: 1fr;
    }

    .city-sidebar {
        order: 2;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .city-content {
        order: 1;
    }

    .forecast-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
}

@media (max-width: 768px) {
    .world-title {
        font-size: 2em;
    }

    .world-subtitle {
        font-size: 1.1em;
    }

    .world-stats,
    .country-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-card {
        padding: 18px;
    }

    .stat-card > i {
        font-size: 1.8em;
        min-width: 50px;
        height: 50px;
        padding: 12px;
    }

    .stat-value {
        font-size: 1.4em;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-header h2 {
        font-size: 1.4em;
    }

    .countries-grid {
        grid-template-columns: 1fr;
    }

    .cities-grid-world {
        grid-template-columns: 1fr;
    }

    .country-header-banner,
    .world-header-banner {
        padding: 30px 20px;
    }

    .country-flag-large {
        font-size: 3em;
    }

    .country-title {
        font-size: 1.8em;
    }

    .city-header h1 {
        font-size: 1.8em;
    }

    .forecast-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .forecast-day:last-child {
        grid-column: span 2;
        max-width: 50%;
        margin: 0 auto;
    }

    .city-sidebar {
        grid-template-columns: 1fr;
    }

    .weather-card {
        padding: 20px;
    }

    .practical-info-grid {
        gap: 10px;
    }

    .info-item {
        padding: 10px 12px;
    }

    .current-weather .temp-value {
        font-size: 2.5em;
    }

    .current-weather .current-icon {
        font-size: 2.5em;
    }
}

@media (max-width: 480px) {
    .world-stats,
    .country-stats {
        grid-template-columns: 1fr;
    }

    .forecast-grid {
        grid-template-columns: 1fr;
    }

    .forecast-day:last-child {
        grid-column: span 1;
        max-width: 100%;
    }

    .city-header-content {
        flex-direction: column;
        text-align: center;
    }

    .city-location {
        justify-content: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}