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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #ff6f00 0%, #ff8f00 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow-x: hidden;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 1000px;
    width: 100%;
    position: relative;
}

h1 {
    color: #333;
    text-align: center;
    margin-bottom: 25px;
    font-size: 32px;
}

/* Story Box */
.story-box {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border-left: 5px solid #ff6f00;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.story-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.icon {
    font-size: 50px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.header-text strong {
    color: #e65100;
    font-size: 20px;
    display: block;
}

.header-text p {
    color: #666;
    font-size: 14px;
    margin-top: 3px;
}

.story-text {
    color: #333;
    line-height: 1.8;
    font-size: 18px;
    text-align: center;
}

/* Garden Section */
.garden-section {
    margin: 40px 0;
    display: flex;
    justify-content: center;
}

.garden-container {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border: 3px solid #4caf50;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.garden-svg {
    width: 100%;
    max-width: 500px;
    height: auto;
    display: block;
}

.fence-group {
    animation: fence-build 2s ease-in-out infinite alternate;
}

@keyframes fence-build {
    0% { opacity: 0.8; }
    100% { opacity: 1; }
}

.arc-fence circle {
    animation: fence-glow 2s ease-in-out infinite;
}

@keyframes fence-glow {
    0%, 100% { fill: #8d6e63; }
    50% { fill: #a1887f; }
}

/* Info Section */
.info-section {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.info-box {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 3px solid #1976d2;
    border-radius: 15px;
    padding: 20px;
}

.info-label {
    font-size: 18px;
    font-weight: bold;
    color: #0d47a1;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 2px solid #1976d2;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.info-item {
    font-size: 16px;
    color: #333;
}

.value {
    color: #d84315;
    font-weight: bold;
    font-size: 18px;
}

.formula-text {
    font-family: 'Courier New', monospace;
    font-size: 16px;
    color: #1565c0;
    font-weight: bold;
}

/* Question Section */
.question-section {
    margin: 30px 0;
}

.question-label {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    text-align: center;
    margin-bottom: 15px;
    padding: 20px;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-radius: 10px;
    border-left: 5px solid #4caf50;
}

.question-text {
    font-size: 18px;
    color: #555;
    text-align: center;
    margin-bottom: 25px;
}

/* Input Container */
.input-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
    padding: 25px;
    background: linear-gradient(135deg, #fff9c4 0%, #fff59d 100%);
    border-radius: 15px;
    border: 3px solid #fbc02d;
    flex-wrap: wrap;
}

.input-label {
    font-size: 24px;
    font-weight: bold;
    color: #f57f17;
}

.answer-input {
    min-width: 200px;
    max-width: 300px;
    padding: 15px 20px;
    font-size: 24px;
    font-weight: bold;
    border: 3px solid #1976d2;
    border-radius: 10px;
    text-align: center;
    outline: none;
    transition: all 0.3s ease;
}

.answer-input:focus {
    border-color: #0d47a1;
    box-shadow: 0 0 10px rgba(25, 118, 210, 0.3);
}

.input-unit {
    font-size: 24px;
    font-weight: bold;
    color: #f57f17;
}

.check-btn {
    background: #1976d2;
    color: white;
    border: none;
    padding: 15px 35px;
    border-radius: 10px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.check-btn:hover {
    background: #0d47a1;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(25, 118, 210, 0.4);
}

.check-btn:active {
    transform: translateY(0);
}

.check-btn:disabled {
    background: #9e9e9e;
    cursor: not-allowed;
    transform: none;
}

/* Feedback */
.feedback {
    text-align: center;
    font-size: 20px;
    font-weight: bold;
    min-height: 30px;
    margin-top: 20px;
    padding: 15px;
    border-radius: 10px;
}

.feedback.success {
    color: #4caf50;
    background: linear-gradient(135deg, #c8e6c9 0%, #a5d6a7 100%);
}

.feedback.error {
    color: #f44336;
    background: linear-gradient(135deg, #ffcdd2 0%, #ef9a9a 100%);
}

/* Reset Button */
.reset-btn {
    display: block;
    margin: 20px auto;
    background: #4caf50;
    color: white;
    border: none;
    padding: 15px 40px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    background: #388e3c;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(76, 175, 80, 0.4);
}

.reset-btn:active {
    transform: translateY(0);
}

/* Balloons Animation */
.balloons-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    display: none;
}

.balloons-container.active {
    display: block;
}

.balloon {
    position: absolute;
    bottom: -100px;
    font-size: 60px;
    animation: rise 4s ease-out forwards;
    opacity: 0;
}

.balloon:nth-child(1) { animation-delay: 0s; }
.balloon:nth-child(2) { animation-delay: 0.1s; }
.balloon:nth-child(3) { animation-delay: 0.2s; }
.balloon:nth-child(4) { animation-delay: 0.3s; }
.balloon:nth-child(5) { animation-delay: 0.4s; }
.balloon:nth-child(6) { animation-delay: 0.5s; }
.balloon:nth-child(7) { animation-delay: 0.6s; }
.balloon:nth-child(8) { animation-delay: 0.7s; }
.balloon:nth-child(9) { animation-delay: 0.8s; }
.balloon:nth-child(10) { animation-delay: 0.9s; }
.balloon:nth-child(11) { animation-delay: 1s; }
.balloon:nth-child(12) { animation-delay: 1.1s; }
.balloon:nth-child(13) { animation-delay: 1.2s; }
.balloon:nth-child(14) { animation-delay: 1.3s; }
.balloon:nth-child(15) { animation-delay: 1.4s; }
.balloon:nth-child(16) { animation-delay: 1.5s; }
.balloon:nth-child(17) { animation-delay: 1.6s; }

@keyframes rise {
    0% {
        bottom: -100px;
        opacity: 0;
        transform: translateX(0) rotate(0deg);
    }
    10% {
        opacity: 1;
    }
    100% {
        bottom: 110%;
        opacity: 0;
        transform: translateX(50px) rotate(20deg);
    }
}

/* Responsive */
@media (max-width: 968px) {
    .info-section {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .container {
        padding: 25px;
    }

    h1 {
        font-size: 26px;
    }

    .garden-svg {
        max-width: 350px;
    }

    .question-label {
        font-size: 18px;
    }

    .answer-input {
        min-width: 150px;
        font-size: 20px;
    }

    .input-container {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 22px;
    }

    .story-text {
        font-size: 16px;
    }

    .garden-svg {
        max-width: 280px;
    }

    .question-label {
        font-size: 16px;
    }

    .answer-input {
        min-width: 120px;
        font-size: 18px;
        padding: 12px 15px;
    }

    .input-label, .input-unit {
        font-size: 20px;
    }

    .check-btn {
        padding: 12px 25px;
        font-size: 16px;
    }

    .feedback {
        font-size: 18px;
    }
}