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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #74b9ff 0%, #2d3436 100%);
            min-height: 100vh;
            overflow-x: hidden;
            position: relative;
        }

        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            position: relative;
            z-index: 10;
        }

        .header {
            text-align: center;
            margin-bottom: 30px;
            animation: fadeInDown 1s ease-out;
        }

        .title {
            color: white;
            font-size: 2.5rem;
            font-weight: 300;
            margin-bottom: 10px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }

        .subtitle {
            color: rgba(255,255,255,0.9);
            font-size: 1.2rem;
            font-weight: 300;
        }

        .converter-card {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(20px);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            animation: fadeInUp 1s ease-out 0.3s both;
        }

        .input-section, .output-section {
            margin-bottom: 25px;
        }

        .input-label {
            display: block;
            color: #2d3436;
            font-size: 0.95rem;
            margin-bottom: 15px;
            line-height: 1.5;
        }

        .input-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .input-title {
            font-weight: 600;
            color: #2d3436;
            font-size: 1rem;
        }

        .temperature-input, .temperature-output {
            padding: 12px 16px;
            border: 2px solid #74b9ff;
            border-radius: 10px;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            background: white;
        }

        .temperature-input:focus {
            outline: none;
            border-color: #0984e3;
            box-shadow: 0 0 0 3px rgba(116, 185, 255, 0.2);
            transform: translateY(-1px);
        }

        .temperature-output {
            background: #f8f9fa;
            color: #2d3436;
            font-weight: 600;
        }

        .button-group {
            display: flex;
            gap: 10px;
            margin: 25px 0;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 25px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255,255,255,0.3);
            border-radius: 50%;
            transition: all 0.3s ease;
            transform: translate(-50%, -50%);
        }

        .btn:hover::before {
            width: 300px;
            height: 300px;
        }

        .btn-convert {
            background: linear-gradient(45deg, #74b9ff, #0984e3);
            color: white;
            flex: 1;
        }

        .btn-convert:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(116, 185, 255, 0.4);
        }

        .btn-reset {
            background: linear-gradient(45deg, #fd79a8, #e84393);
            color: white;
        }

        .btn-reset:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(253, 121, 168, 0.4);
        }

        .btn-reverse {
            background: linear-gradient(45deg, #00b894, #00cec9);
            color: white;
        }

        .btn-reverse:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 184, 148, 0.4);
        }

        .calculation-display {
            background: #f8f9fa;
            border-left: 4px solid #74b9ff;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.5s ease;
        }

        .calculation-display.show {
            opacity: 1;
            transform: translateY(0);
        }

        .calculation-label {
            font-weight: 600;
            color: #2d3436;
            display: block;
            margin-bottom: 8px;
        }

        .calculation-formula {
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
            color: #0984e3;
            font-weight: 600;
        }

        .explanation-section {
            margin-top: 30px;
            padding-top: 25px;
            border-top: 2px solid #74b9ff;
        }

        .explanation-title {
            color: #2d3436;
            margin-bottom: 20px;
            font-size: 1.5rem;
        }

        .explanation-content h4 {
            color: #0984e3;
            margin-bottom: 15px;
            font-size: 1.2rem;
        }

        .explanation-content p {
            line-height: 1.6;
            margin-bottom: 15px;
            color: #636e72;
        }

        .formula {
            background: #e3f2fd;
            padding: 15px;
            border-radius: 8px;
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
            color: #0984e3;
            text-align: center;
            margin: 15px 0;
            border: 2px solid #74b9ff;
        }

        /* Weather Animation */
        .weather-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 1;
        }

        .cloud {
            position: absolute;
            background: rgba(255,255,255,0.1);
            border-radius: 50px;
            opacity: 0.6;
        }

        .cloud::before {
            content: '';
            position: absolute;
            background: rgba(255,255,255,0.1);
            border-radius: 50px;
        }

        .cloud1 {
            width: 100px;
            height: 40px;
            top: 20%;
            left: -100px;
            animation: float 20s infinite linear;
        }

        .cloud1::before {
            top: -15px;
            left: 10px;
            width: 50px;
            height: 50px;
        }

        .cloud2 {
            width: 80px;
            height: 30px;
            top: 60%;
            left: -80px;
            animation: float 25s infinite linear 5s;
        }

        .cloud2::before {
            top: -10px;
            left: 15px;
            width: 40px;
            height: 40px;
        }

        .cloud3 {
            width: 120px;
            height: 50px;
            top: 40%;
            left: -120px;
            animation: float 30s infinite linear 10s;
        }

        .cloud3::before {
            top: -20px;
            left: 20px;
            width: 60px;
            height: 60px;
        }

        /* Animations */
        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes float {
            to {
                transform: translateX(calc(100vw + 200px));
            }
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.1);
            }
        }

        /* Error Styles */
        .error {
            border-color: #e17055 !important;
            box-shadow: 0 0 0 3px rgba(225, 112, 85, 0.2) !important;
        }

        .error-message {
            color: #e17055;
            font-size: 0.9rem;
            margin-top: 5px;
            display: none;
        }

        .error-message.show {
            display: block;
            animation: fadeInUp 0.3s ease;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .container {
                padding: 15px;
            }
            
            .title {
                font-size: 2rem;
            }
            
            .converter-card {
                padding: 20px;
            }
            
            .button-group {
                flex-direction: column;
            }
            
            .btn {
                width: 100%;
            }
        }

        @media (max-width: 480px) {
            .title {
                font-size: 1.8rem;
            }
            
            .subtitle {
                font-size: 1rem;
            }
            
            .converter-card {
                padding: 15px;
            }
        }