:root {
    --primary-color: #ff85a2;
    --secondary-color: #a2d2ff;
    --background-color: #fff1f2;
    --text-color: #4a4a4a;
    --accent-color: #ff4d6d;
    --white: #ffffff;
}

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

body {
    font-family: 'M PLUS Rounded 1c', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.4;
    padding: 10px;
}

.lang-toggle {
    position: absolute;
    top: 15px;
    right: 20px;
    display: flex;
    gap: 5px;
}

.lang-btn {
    background: #eee;
    color: #666;
    border: 2px solid #ddd;
    padding: 3px 8px;
    font-size: 0.75rem;
    min-width: 45px;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: none;
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

header { text-align: center; margin-bottom: 20px; }
h1 { 
    color: var(--accent-color); 
    font-size: 2rem; 
    cursor: pointer;
    user-select: none; /* テキスト選択を防止 */
    transition: transform 0.1s;
}

h1:active {
    transform: scale(0.95); /* クリックした時に少し小さくなるにゃ */
}

.api-section { margin-bottom: 20px; text-align: center; }
.api-section input {
    padding: 8px; border-radius: 10px; border: 2px solid var(--primary-color); width: 300px; max-width: 80%;
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .grid-layout { grid-template-columns: 1fr; }
}

.card {
    background: #fff8f9;
    padding: 20px;
    border-radius: 20px;
    border: 2px solid var(--primary-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.decompress-section { border-color: var(--secondary-color); background: #f0f7ff; }

h2 { font-size: 1.2rem; margin-bottom: 10px; text-align: center; }

.field { 
    display: flex; 
    flex-direction: column; 
    gap: 10px; 
    align-items: center; /* 子要素自体を中央に */
    text-align: center;  /* テキスト自体も中央に */
    width: 100%;
}

label { 
    font-size: 0.85rem; 
    font-weight: bold; 
    width: 100%; /* 幅いっぱいに広げてテキストを中央に */
}

textarea {
    width: 100%; 
    height: 100px; 
    padding: 10px; 
    border-radius: 15px;
    border: 2px solid #ddd; 
    font-family: inherit; 
    resize: none;
}

.actions { 
    display: flex; 
    justify-content: center; 
    margin: 5px 0;
}

button {
    background: var(--primary-color); 
    color: white; 
    border: none; 
    padding: 10px 25px;
    font-weight: bold; 
    border-radius: 25px; 
    cursor: pointer; 
    transition: 0.2s;
    min-width: 180px;
}

button.secondary { background: var(--secondary-color); }
button:hover { opacity: 0.8; transform: translateY(-2px); }

.btn-wrap {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin-top: 5px;
}

.small-btn {
    display: block;      /* ブロック要素にして */
    margin: 0;
    font-size: 0.8rem; 
    background: #aaa; 
    padding: 6px 15px; 
    border-radius: 20px;
    min-width: 140px;
    border: none;
    color: white;
    cursor: pointer;
}

.voice-btn {
    background: linear-gradient(135deg, #7a5cff, #a06bff);
}

.stats {
    font-size: 0.9rem; font-weight: bold; text-align: center; color: var(--accent-color);
}

.ai-review {
    margin-top: 30px; background: #fff; padding: 15px; border-radius: 20px;
    border-left: 10px solid var(--primary-color); box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.hidden { display: none; }

/* Ultra Mode Theme */
body.ultra-theme {
    background-color: #0b0c10; /* より深い黒 */
    --primary-color: #ffd700;
    --secondary-color: #45a29e;
    --accent-color: #66fcf1;
    --background-color: #1f2833;
    color: #ffffff; /* 全体の文字を白に */
}

body.ultra-theme .container {
    border-color: gold;
    background: #1f2833;
    color: #ffffff;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

body.ultra-theme h1 {
    color: #ffd700 !important;
    font-size: 1.6rem; /* 少し小さくして1行に収めるにゃ */
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.7);
    margin-bottom: 5px;
}

body.ultra-theme header p {
    color: #66fcf1 !important; /* サブタイトルを明るいシアンに */
    font-size: 0.8rem;
    font-weight: bold;
}

body.ultra-theme .card {
    background: #0b0c10;
    border-color: #45a29e;
    color: #ffffff;
}

body.ultra-theme textarea {
    background: #1f2833;
    color: #66fcf1;
    border-color: #45a29e;
}

body.ultra-theme .small-btn {
    background: gold;
    color: black;
    font-weight: bold;
}

body.ultra-theme .voice-btn {
    background: gold;
    color: black;
}

footer { text-align: center; margin-top: 30px; font-size: 0.8rem; color: #aaa; }
footer p {
    cursor: pointer;
    user-select: none;
    display: inline-block;
    padding: 10px;
    transition: color 0.3s;
}
footer p:hover {
    color: var(--primary-color);
}


.ultra-explain {
    margin: 15px auto;
    padding: 10px 20px;
    border: 2px solid gold;
    border-radius: 15px;
    background: rgba(255, 215, 0, 0.1);
    max-width: 80%;
}
.ultra-explain p {
    color: #ffd700 !important;
    font-size: 0.85rem !important;
    line-height: 1.5;
}