:root {
    --primary-color: #4a6fa5;
    --secondary-color: #166088;
    --accent-color: #4fc3f7;
    --background-light: #f5f7fa;
    --background-dark: #1a1a2e;
    --card-light: #ffffff;
    --card-dark: #16213e;
    --text-light: #333333;
    --text-dark: #e1e1e1;
    --shadow-light: 0 4px 15px rgba(0, 0, 0, 0.1);
    --shadow-dark: 0 4px 15px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-light);
    color: var(--text-light);
    transition: var(--transition);
    min-height: 100vh;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
}

body.dark-mode header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    gap: 15px;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background-color: rgba(74, 111, 165, 0.1);
    transform: translateY(-2px);
}

body.dark-mode .btn-icon:hover {
    background-color: rgba(74, 111, 165, 0.3);
}

/* Search Section */
.search-section {
    margin-bottom: 30px;
}

.search-container {
    display: flex;
    position: relative;
    margin-bottom: 20px;
}

#search-input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #e1e5e9;
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    background-color: var(--card-light);
    color: var(--text-light);
}

body.dark-mode #search-input {
    background-color: var(--card-dark);
    color: var(--text-dark);
    border-color: #333;
}

#search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
}

#search-btn {
    position: absolute;
    right: 5px;
    top: 5px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

#search-btn:hover {
    background-color: var(--secondary-color);
    transform: scale(1.05);
}

.favorites-container h3 {
    margin-bottom: 15px;
    font-weight: 500;
    color: var(--secondary-color);
}

.favorites-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.favorite-item {
    background-color: var(--card-light);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

body.dark-mode .favorite-item {
    background-color: var(--card-dark);
    box-shadow: var(--shadow-dark);
}

.favorite-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 111, 165, 0.2);
}

.favorite-item .remove-favorite {
    opacity: 0.7;
    cursor: pointer;
    transition: var(--transition);
}

.favorite-item .remove-favorite:hover {
    opacity: 1;
    color: #ff5252;
}

/* Weather Display */
.weather-display {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.current-weather {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    padding: 30px;
    color: white;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

body.dark-mode .current-weather {
    box-shadow: var(--shadow-dark);
}

.location-info {
    margin-bottom: 25px;
}

.location-info h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 5px;
}

#current-date {
    font-size: 1rem;
    opacity: 0.9;
}

.weather-info {
    display: flex;
    align-items: center;
    gap: 30px;
}

.weather-icon {
    position: relative;
    width: 150px;
    height: 150px;
}

.weather-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 5px 15px rgba(0, 0, 0, 0.2));
}

.temp-animation {
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 5px;
    overflow: hidden;
}

.temp-animation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 30%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 5px;
    animation: wave 2s infinite ease-in-out;
}

@keyframes wave {
    0%, 100% {
        transform: translateX(0);
    }
    50% {
        transform: translateX(140%);
    }
}

.weather-details {
    flex: 1;
}

.temp-container {
    margin-bottom: 15px;
}

#current-temp {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

#feels-like {
    font-size: 1.1rem;
    opacity: 0.9;
    display: block;
    margin-top: 5px;
}

.condition {
    font-size: 1.3rem;
    margin-bottom: 20px;
    font-weight: 500;
}

.additional-info {
    display: flex;
    gap: 25px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.info-item i {
    font-size: 1.2rem;
    opacity: 0.8;
}

/* Forecast Section */
.forecast-section {
    background-color: var(--card-light);
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

body.dark-mode .forecast-section {
    background-color: var(--card-dark);
    box-shadow: var(--shadow-dark);
}

.tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 2px solid rgba(0, 0, 0, 0.1);
    padding-bottom: 10px;
}

body.dark-mode .tabs {
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.tab-btn {
    background: none;
    border: none;
    padding: 8px 16px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    color: var(--text-light);
    opacity: 0.7;
    transition: var(--transition);
}

body.dark-mode .tab-btn {
    color: var(--text-dark);
}

.tab-btn:hover {
    opacity: 1;
}

.tab-btn.active {
    opacity: 1;
    color: var(--primary-color);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

.tab-content {
    margin-top: 20px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* Hourly Forecast */
.hourly-forecast {
    display: flex;
    gap: 15px;
    overflow-x: auto;
    padding: 10px 0;
    scrollbar-width: thin;
}

.hourly-forecast::-webkit-scrollbar {
    height: 5px;
}

.hourly-forecast::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
}

.hourly-forecast::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

.hourly-item {
    min-width: 80px;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 15px;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    backdrop-filter: blur(10px);
}

body.dark-mode .hourly-item {
    background-color: rgba(255, 255, 255, 0.1);
}

.hourly-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.hourly-time {
    font-weight: 500;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.hourly-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 10px;
}

.hourly-temp {
    font-weight: 600;
    font-size: 1.1rem;
}

/* Daily Forecast */
.daily-forecast {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.daily-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 15px;
    transition: var(--transition);
    cursor: pointer;
    backdrop-filter: blur(10px);
}

body.dark-mode .daily-item {
    background-color: rgba(255, 255, 255, 0.1);
}

.daily-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.daily-day {
    width: 80px;
    font-weight: 500;
}

.daily-icon {
    width: 50px;
    height: 50px;
    margin: 0 20px;
}

.daily-temp {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-left: auto;
    font-weight: 600;
}

.daily-temp-high {
    font-size: 1.2rem;
}

.daily-temp-low {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Additional Details */
.additional-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.detail-card {
    background-color: var(--card-light);
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

body.dark-mode .detail-card {
    background-color: var(--card-dark);
    box-shadow: var(--shadow-dark);
}

.detail-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.sun-moon-info, .visibility-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.sun-info, .moon-info, .visibility-info > div {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 5px;
}

.sun-info i, .moon-info i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.sun-info i {
    color: #ffd700;
}

.moon-info i {
    color: #c0c0c0;
}

.visibility-info p:first-child {
    opacity: 0.7;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

/* Loading State */
.loading {
    opacity: 0.6;
}

.loading::after {
    content: 'Loading...';
    display: block;
    text-align: center;
    padding: 20px;
}

/* Error State */
.error {
    color: #ff5252;
    text-align: center;
    padding: 20px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .weather-info {
        flex-direction: column;
        text-align: center;
    }
    
    .additional-info {
        flex-direction: column;
        gap: 15px;
    }
    
    .additional-details {
        grid-template-columns: 1fr;
    }
    
    .weather-icon {
        width: 120px;
        height: 120px;
    }
    
    #current-temp {
        font-size: 2.8rem;
    }
    
    .location-info h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    #search-input {
        width: 100%;
        margin-bottom: 10px;
    }
    
    #search-btn {
        position: relative;
        width: 100%;
        height: 50px;
        margin: 0;
    }
    
    .favorites-container h3 {
        text-align: center;
    }
    
    .weather-display {
        gap: 20px;
    }
    
    .current-weather {
        padding: 20px;
    }
    
    .forecast-section, .detail-card {
        padding: 20px;
    }
}