/* Reset and base styles */
:root {
    /* New Trendy Pastel Palette */
    --primary-color: #A3D8F4; /* Soft Blue */
    --secondary-color: #F8B4CD; /* Soft Pink */
    --accent-color: #FFDA79; /* Soft Yellow */
    --text-color: #333333; /* Darker text for readability */
    --light-text-color: #666666; /* Medium dark text */
    --background-color: #F0F8FF; /* Alice Blue - light, airy background */
    --card-background: #FFFFFF; /* Pure white for cards */
    --button-hover: #8ECDDD; /* Slightly darker blue for hover */
    --shadow-light: rgba(0, 0, 0, 0.05); /* Lighter shadow */
    --shadow-medium: rgba(0, 0, 0, 0.12); /* Medium shadow */
    --border-radius-soft: 18px; /* Slightly less rounded, more modern */
    --spacing-medium: 20px;
    --spacing-large: 30px;
}

/* Dark Theme Variables */
body[data-theme='dark'] {
    --primary-color: #79BFDA; /* Darker Soft Blue */
    --secondary-color: #B28FB2; /* Darker Soft Pink */
    --accent-color: #DAA520; /* Darker Soft Yellow / Goldenrod */
    --text-color: #E0E0E0; /* Light text for dark background */
    --light-text-color: #AAAAAA; /* Medium light text */
    --background-color: #282C34; /* Dark background */
    --card-background: #3A3F47; /* Darker card background */
    --button-hover: #5D99C6; /* Darker blue for hover */
    --shadow-light: rgba(255, 255, 255, 0.05); /* Light shadow for dark theme */
    --shadow-medium: rgba(255, 255, 255, 0.1); /* Medium shadow for dark theme */
}

body {
    margin: 0;
    font-family: 'Nanum Gothic Coding', 'Arial', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: var(--spacing-medium);
    box-sizing: border-box;
    line-height: 1.6;
}

#app-container {
    background-color: var(--card-background);
    border-radius: var(--border-radius-soft);
    box-shadow: 0 12px 30px var(--shadow-medium); /* More refined shadow */
    padding: var(--spacing-large);
    max-width: 600px;
    width: 100%;
    text-align: center;
    animation: fadeIn 0.8s ease-out;
}

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

/* Header */
header {
    margin-bottom: var(--spacing-large);
    display: flex; /* Enable flexbox for alignment */
    justify-content: space-between; /* Space out title/subtitle and toggle button */
    align-items: center; /* Vertically align items */
    position: relative; /* For absolute positioning of toggle if needed, or just for context */
}

.header-content {
    flex-grow: 1; /* Allow header content to take up available space */
    text-align: center; /* Center the text within its flex item */
    margin-right: var(--spacing-medium); /* Space between content and button */
}

header h1 {
    color: var(--primary-color);
    font-size: 2.6em; /* Slightly larger */
    margin-bottom: 10px;
    text-shadow: 3px 3px 8px var(--shadow-light); /* Softer, more prominent shadow */
    word-break: keep-all; /* Prevent breaking words in Korean titles */
}

header p {
    color: var(--light-text-color);
    font-size: 1.1em; /* Slightly larger */
}

.toggle-button {
    /* Specific styles for the toggle button,
       reusing .cute-button but potentially modifying it */
    padding: 10px 15px;
    font-size: 1.2em;
    border-radius: 50%; /* Make it round */
    width: 50px; /* Fixed width */
    height: 50px; /* Fixed height */
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px var(--shadow-medium);
    margin: 0; /* Remove default button margin */
    flex-shrink: 0; /* Prevent button from shrinking */
}

.toggle-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--shadow-medium);
}

/* Main Content Screens */
.screen {
    display: none;
    animation: slideIn 0.5s ease-out;
}

.screen.active {
    display: block;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Start Screen */
.main-image, .result-image {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-soft); /* More rounded */
    margin-bottom: var(--spacing-medium);
    box-shadow: 0 6px 15px var(--shadow-medium); /* More refined shadow */
}

.input-group {
    margin-bottom: var(--spacing-medium);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.input-group label {
    font-size: 1.2em; /* Slightly larger */
    color: var(--text-color);
    margin-bottom: 10px;
    font-weight: bold;
}

.input-group input[type="text"] {
    padding: 12px 18px; /* Slightly more padding */
    border: 2px solid var(--accent-color); /* Use accent color for border */
    border-radius: 12px; /* Less rounded for a modern look */
    font-size: 1.1em;
    text-align: center;
    max-width: 280px; /* Slightly wider */
    width: 80%;
    box-shadow: 0 4px 12px var(--shadow-light); /* Softer shadow */
    transition: all 0.3s ease;
    outline: none;
    background-color: var(--background-color); /* Light input background */
    color: var(--text-color);
}

.input-group input[type="text"]::placeholder {
    color: var(--light-text-color);
}

.input-group input[type="text"]:focus {
    border-color: var(--primary-color); /* Focus with primary color */
    box-shadow: 0 5px 15px var(--shadow-medium);
}

/* Buttons */
.cute-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-soft); /* More rounded */
    padding: 16px 30px; /* Larger padding */
    font-size: 1.2em; /* Larger font */
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    box-shadow: 0 6px 15px var(--shadow-medium); /* More refined shadow */
    margin: 10px;
    outline: none;
}

.cute-button:hover {
    background-color: var(--button-hover);
    transform: translateY(-4px); /* More lift */
    box-shadow: 0 10px 25px var(--shadow-medium);
}

.cute-button:active {
    transform: translateY(0);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

/* Question Screen */
#question-card {
    background-color: var(--card-background); /* White */
    padding: var(--spacing-medium);
    border-radius: var(--border-radius-soft); /* More rounded */
    box-shadow: 0 10px 30px var(--shadow-medium); /* More pronounced shadow */
    margin-bottom: var(--spacing-medium);
}

#question-card h2 {
    color: var(--text-color); /* Dark Gray for better readability on pastel */
    font-size: 1.8em; /* Slightly larger */
    margin-bottom: var(--spacing-medium);
}

.question-number {
    font-size: 1.2em;
    color: var(--text-color);
    margin-bottom: 15px;
    opacity: 0.8;
}

#answer-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.answer-btn {
    background-color: var(--card-background); /* White */
    color: var(--text-color);
    border: 2px solid var(--primary-color);
    border-radius: 12px; /* Less rounded for a modern look */
    padding: 15px;
    font-size: 1.1em;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 3px 8px var(--shadow-light); /* Softer shadow */
    text-align: left;
    width: 100%;
    box-sizing: border-box;
}

.answer-btn:hover {
    background-color: var(--accent-color); /* Pastel Cyan */
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 12px var(--shadow-medium);
}

.answer-btn:active {
    transform: translateY(0);
    box-shadow: 0 3px 10px var(--shadow-light);
}

/* Result Screen */
#result-title {
    color: var(--primary-color);
    font-size: 2.2em;
    margin-bottom: var(--spacing-medium);
}

#result-description {
    font-size: 1.2em;
    line-height: 1.7;
    margin-bottom: var(--spacing-large);
}

/* Footer */
footer {
    margin-top: var(--spacing-large);
    color: var(--light-text-color);
    font-size: 0.9em;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #app-container {
        padding: var(--spacing-medium);
        border-radius: 20px;
        margin: var(--spacing-medium);
    }

    header h1 {
        font-size: 2.2em;
    }

    .cute-button {
        padding: 15px 30px;
        font-size: 1.1em;
    }

    #question-card h2 {
        font-size: 1.8em;
    }

    .answer-btn {
        padding: 12px;
        font-size: 1em;
    }

    #result-title {
        font-size: 2em;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    #app-container {
        padding: var(--spacing-medium);
    }

    header h1 {
        font-size: 2em;
    }

    header p {
        font-size: 1em;
    }

    .cute-button {
        padding: 12px 25px;
        font-size: 1em;
        margin: 5px;
    }

    #question-card h2 {
        font-size: 1.6em;
    }

    .answer-btn {
        padding: 10px;
        font-size: 0.95em;
    }

    #result-title {
        font-size: 1.8em;
    }

    #result-description {
        font-size: 1.05em;
    }
}