/* ===== Global Styles ===== */
        :root {
            --primary: #3498db;
            --primary-dark: #2980b9;
            --secondary: #2ecc71;
            --dark: #2c3e50;
            --light: #ecf0f1;
            --gray: #95a5a6;
            --danger: #e74c3c;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: 'Open Sans', sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }

        h1, h2, h3, h4 {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
        }

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }

        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        .btn-block {
            display: block;
            width: 100%;
        }

        .text-center {
            text-align: center;
        }

        .mt-1 { margin-top: 10px; }
        .mt-2 { margin-top: 20px; }
        .mt-3 { margin-top: 30px; }
        .mt-4 { margin-top: 40px; }

        /* ===== Weather App Styles ===== */
        .weather-app {
            background-color: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
            padding: 30px;
            margin: 50px auto;
            max-width: 800px;
        }

        .app-title {
            margin-bottom: 30px;
            color: var(--dark);
            font-size: 2.2rem;
        }

        .search-container {
            display: flex;
            gap: 10px;
            margin-bottom: 30px;
        }

        .search-input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .search-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
        }

        .error-message {
            color: var(--danger);
            background-color: rgba(231, 76, 60, 0.1);
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 20px;
            display: none;
        }

        /* Current Weather Section */
        .current-weather {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid #eee;
        }

        .weather-main {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .weather-location {
            font-size: 1.8rem;
            margin-bottom: 10px;
        }

        .weather-date {
            color: var(--gray);
            margin-bottom: 20px;
        }

        .weather-temp {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .weather-description {
            display: flex;
            align-items: center;
            font-size: 1.2rem;
            margin-bottom: 20px;
        }

        .weather-icon {
            width: 50px;
            height: 50px;
            margin-right: 10px;
        }

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

        .detail-item {
            display: flex;
            align-items: center;
            background-color: var(--light);
            padding: 15px;
            border-radius: 5px;
        }

        .detail-icon {
            font-size: 1.5rem;
            margin-right: 15px;
            color: var(--primary);
        }

        .detail-text span {
            display: block;
        }

        .detail-label {
            font-size: 0.9rem;
            color: var(--gray);
        }

        .detail-value {
            font-weight: 600;
        }

        /* Forecast Section */
        .forecast-title {
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .forecast-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .forecast-day {
            background-color: var(--light);
            border-radius: 5px;
            padding: 15px;
            text-align: center;
        }

        .forecast-date {
            font-weight: 600;
            margin-bottom: 10px;
        }

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

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

        .temp-max {
            font-weight: 600;
        }

        .temp-min {
            color: var(--gray);
        }

        /* Loading State */
        .loading {
            display: none;
            text-align: center;
            padding: 20px;
        }

        .loading-spinner {
            border: 4px solid rgba(0, 0, 0, 0.1);
            border-radius: 50%;
            border-top: 4px solid var(--primary);
            width: 40px;
            height: 40px;
            animation: spin 1s linear infinite;
            margin: 0 auto 15px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* ===== Responsive Design ===== */
        @media (max-width: 768px) {
            .current-weather {
                grid-template-columns: 1fr;
            }

            .weather-details {
                grid-template-columns: 1fr;
            }

            .app-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 576px) {
            .weather-app {
                padding: 20px;
                margin: 20px auto;
            }

            .search-container {
                flex-direction: column;
            }

            .forecast-container {
                grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            }
        }