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

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    background-size: 400% 400%;
    animation: gradientShift 3s ease infinite;
    min-height: 100vh;
    overflow-x: hidden;
    touch-action: manipulation; /* スマホでのタップ時の画面移動を防ぐ */
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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

h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    transition: all 0.3s ease;
}

h1:hover {
    transform: scale(1.2) rotate(5deg);
    color: #ff6b6b;
}

.form-section {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    transition: all 0.5s ease;
}

.form-section:hover {
    transform: translateX(20px);
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 2px solid #ddd;
    border-radius: 5px;
    transition: all 0.3s ease;
}

input:focus {
    border-color: #ff6b6b;
    transform: rotate(2deg);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0) rotate(2deg); }
    25% { transform: translateX(-5px) rotate(2deg); }
    75% { transform: translateX(5px) rotate(2deg); }
}

.button-section, .fake-buttons, .disappearing-elements {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: scale(1.1);
}

.btn.primary {
    background: #4ecdc4;
    color: white;
}

.btn.secondary {
    background: #ff6b6b;
    color: white;
}

.btn.info {
    background: #45b7d1;
    color: white;
}

.btn.fake {
    background: #96ceb4;
    color: white;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

.btn.vanish {
    background: #ffa726;
    color: white;
}

.moving-elements {
    margin: 30px 0;
    height: 150px;
    position: relative;
}

.moving-box {
    position: absolute;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.5s ease;
    border: 2px solid #333;
}

#box1 {
    top: 0;
    left: 0;
    animation: float 3s ease-in-out infinite;
}

#box2 {
    top: 50px;
    right: 0;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-30px); }
}

.rotating-section {
    text-align: center;
    margin: 30px 0;
}

#rotating-text {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    animation: rotate 4s linear infinite;
    display: inline-block;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.color-changing-area {
    padding: 20px;
    text-align: center;
    border-radius: 10px;
    margin: 20px 0;
    animation: colorChange 2s ease-in-out infinite;
}

@keyframes colorChange {
    0% { background-color: #ff6b6b; color: white; }
    25% { background-color: #4ecdc4; color: white; }
    50% { background-color: #45b7d1; color: white; }
    75% { background-color: #96ceb4; color: white; }
    100% { background-color: #ff6b6b; color: white; }
}

.fake-progress {
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
}

.progress-bar {
    width: 100%;
    height: 20px;
    background: #ddd;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4);
    width: 0%;
    transition: width 0.3s ease;
    animation: progressFake 5s ease-in-out infinite;
}

@keyframes progressFake {
    0% { width: 0%; }
    50% { width: 80%; }
    70% { width: 30%; }
    100% { width: 95%; }
}

.confusion-counter {
    text-align: center;
    font-size: 24px;
    font-weight: bold;
    color: #333;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px;
    border-radius: 10px;
    margin: 20px 0;
}

.floating-annoyance {
    position: fixed;
    top: 50%;
    right: 20px;
    background: #ff6b6b;
    color: white;
    padding: 15px;
    border-radius: 10px;
    z-index: 1000;
    animation: floatAnnoy 3s ease-in-out infinite;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

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

.floating-annoyance button {
    background: none;
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    float: right;
    margin-left: 10px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .button-section, .fake-buttons, .disappearing-elements {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .moving-elements {
        height: 200px;
    }
    
    .floating-annoyance {
        right: 10px;
        left: 10px;
        right: 10px;
    }
}

/* 混乱を増すための追加スタイル */
.chaos-mode {
    animation: chaosRotate 1s ease-in-out infinite;
}

@keyframes chaosRotate {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(2deg); }
    50% { transform: rotate(0deg); }
    75% { transform: rotate(-2deg); }
    100% { transform: rotate(0deg); }
}

.upside-down {
    transform: rotate(180deg);
    transition: transform 1s ease;
}

.invisible {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.giant {
    transform: scale(2);
    transition: transform 0.5s ease;
}

.tiny {
    transform: scale(0.5);
    transition: transform 0.5s ease;
}