:root {
    /* Light theme variables */
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --background-color: #f8f9fa;
    --text-color: #2b2d42;
    --card-color: #ffffff;
    --shadow-color: rgba(67, 97, 238, 0.1);
    --gradient-start: #4361ee;
    --gradient-end: #3f37c9;
    --nav-height: 70px;
    --nav-bg: #ffffff;
    --nav-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --background-color: #1a1b1e;
    --text-color: #ffffff;
    --card-color: #2b2d42;
    --shadow-color: rgba(76, 201, 240, 0.1);
    --nav-bg: #1a1b1e;
    --nav-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
    padding-top: var(--nav-height);
}

/* Navigation Bar Styles */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--nav-bg);
    box-shadow: var(--nav-shadow);
    z-index: 1000;
    padding: 0 40px;
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-container {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    border: 3px solid var(--primary-color);
    background: white;
    order: 1;
}

.logo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: transform 0.5s ease;
}

.logo-container:hover {
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
    border-color: var(--secondary-color);
}

.logo-container:hover .logo {
    transform: scale(1.1) rotate(5deg);
}

.brand-container {
    display: flex;
    align-items: center;
    order: 2;
}

.brand-name {
    color: transparent;
    background: linear-gradient(135deg, #4cc9f0 0%, #4895ef 50%, #ffd54f 100%);
    -webkit-background-clip: text;
    background-clip: text;
    font-size: 2.2rem;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    font-weight: bold;
    transition: all 0.3s ease;
}

.brand-tagline {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    margin-top: 5px;
    white-space: nowrap;
}

.brand-name::before {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    bottom: 0;
    left: 50%;
    background: linear-gradient(45deg, #ffffff, #ffd54f);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
    border-radius: 2px;
}

.brand-name::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, #4cc9f0, transparent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.brand-name:hover::after {
    transform: scaleX(1);
}

/* Container Styles */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 20px auto;
    background-color: var(--card-color);
    border-radius: 30px;
    box-shadow: 0 20px 40px var(--shadow-color);
    padding: 30px;
    animation: fadeIn 0.5s ease-in-out;
}

.search-container {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    align-items: center;
}

.search-box {
    flex: 1;
    display: flex;
    align-items: center;
    background-color: var(--background-color);
    border-radius: 15px;
    padding: 5px 15px;
}

.location-icon {
    color: var(--primary-color);
    margin-right: 10px;
}

#search-input {
    flex: 1;
    padding: 12px;
    border: none;
    background: none;
    font-size: 16px;
    color: var(--text-color);
}

#search-input:focus {
    outline: none;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 15px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.main-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.current-weather {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 30px;
    border-radius: 20px;
    color: white;
}

.location h2 {
    font-size: 2.5rem;
    margin-bottom: 5px;
}

.location p {
    opacity: 0.9;
    font-size: 1.1rem;
}

.temperature h1 {
    font-size: 4rem;
    margin: 20px 0;
    font-weight: 600;
}

.temperature p {
    font-size: 1.2rem;
    text-transform: capitalize;
}

.details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 15px;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: 10px;
    transition: background-color 0.3s;
}

.detail-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.detail-item i {
    font-size: 1.5rem;
    width: 24px;
    text-align: center;
}

.detail-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-label {
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 500;
}

/* Air Quality Styles */
.aqi-level-1 {
    color: #00e400;
}

.aqi-level-2 {
    color: #ffff00;
}

.aqi-level-3 {
    color: #ff7e00;
}

.aqi-level-4 {
    color: #ff0000;
}

.aqi-level-5 {
    color: #8f3f97;
}

.map-container {
    border-radius: 20px;
    overflow: hidden;
    height: 100%;
    min-height: 400px;
}

#map {
    width: 100%;
    height: 100%;
    border-radius: 20px;
}

.forecast-container {
    background-color: var(--background-color);
    padding: 30px;
    border-radius: 20px;
}

.forecast-container h3 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.forecast-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.forecast-item {
    background-color: var(--card-color);
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.2s;
}

.forecast-item:hover {
    transform: translateY(-5px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Media Queries */
@media (min-width: 1400px) {
    .navbar {
        padding: 0 60px;
    }

    .nav-content {
        max-width: 1600px;
    }

    .brand-name {
        font-size: 2.8rem;
    }

    .logo-container {
        width: 60px;
        height: 60px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 20px;
    }

    .nav-content {
        gap: 15px;
    }

    .logo-container {
        width: 45px;
        height: 45px;
    }

    .brand-name {
        font-size: 1.8rem;
    }

    .container {
        margin: 10px;
        padding: 20px;
        border-radius: 20px;
    }

    .main-info {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .current-weather {
        padding: 20px;
    }

    .location h2 {
        font-size: 2rem;
    }

    .temperature h1 {
        font-size: 3rem;
    }

    .details {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 15px;
    }

    .map-container {
        min-height: 300px;
    }

    .forecast-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .search-box {
        padding: 5px 10px;
    }

    #search-input {
        font-size: 14px;
        padding: 8px;
    }

    button {
        padding: 8px 15px;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 0 15px;
    }

    .brand-name {
        font-size: 1.6rem;
    }

    .container {
        margin: 5px;
        padding: 15px;
    }

    .location h2 {
        font-size: 1.8rem;
    }

    .temperature h1 {
        font-size: 2.5rem;
        margin: 15px 0;
    }

    .temperature p {
        font-size: 1rem;
    }

    .detail-item {
        padding: 8px;
    }

    .detail-item i {
        font-size: 1.2rem;
    }

    .detail-label {
        font-size: 0.8rem;
    }

    .forecast-container {
        padding: 20px;
    }

    .forecast-container h3 {
        font-size: 1.2rem;
        margin-bottom: 15px;
    }

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

    .forecast-item {
        padding: 15px;
    }

    .search-container {
        flex-direction: column;
        gap: 10px;
    }

    .search-box {
        width: 100%;
    }

    #search-btn {
        width: 100%;
    }
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin-left: auto;
    margin-right: 0;
    order: 3;
}

.theme-toggle i {
    font-size: 1.2rem;
    transition: transform 0.5s ease;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

.theme-toggle:hover i {
    transform: rotate(360deg);
}

[data-theme="dark"] .theme-toggle {
    border-color: #ffd54f;
    color: #ffd54f;
}

[data-theme="dark"] .theme-toggle:hover {
    background: #ffd54f;
    color: #1a1b1e;
}