:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #334155;
    --border: #e2e8f0;
    --accent-bg: #f1f5f9;
    --progress-bg: #e2e8f0;
    --progress-fill: #10b981;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
    line-height: 1.5;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

header h1 {
    margin: 0 0 5px 0;
    font-size: 1.5rem;
    color: #1e293b;
}

header p {
    margin: 0;
    font-size: 0.9rem;
    color: #64748b;
}
header p code {
    background: #e2e8f0;
    padding: 2px 5px;
    border-radius: 4px;
    font-family: monospace;
    font-weight: bold;
}

/* 入力エリアレイアウト */
.input-section {
    background: var(--surface);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.textarea-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-block {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
}

.input-block-row {
    display: flex;
    gap: 10px;
}

.label-heading {
    font-weight: bold;
    font-size: 0.85rem;
    color: #475569;
}

textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    box-sizing: border-box;
    line-height: 1.6;
}

textarea.main-area {
    height: 100px;
}
textarea.sub-area {
    height: 80px;
    background-color: #fafafa;
}
textarea.sub-area:focus {
    background-color: #fff;
}

/* コントロール周り */
.controls-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 0.9rem;
}

.control-group.border-left {
    padding-left: 15px;
    border-left: 1px solid var(--border);
}

.sub-control {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.85rem;
    color: #666;
}

.char-input {
    width: 40px;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px;
}

input[type="number"] {
    width: 50px;
    padding: 4px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

input[type="range"] {
    cursor: pointer;
}

.bold { font-weight: bold; }

/* アクションエリア */
.action-area {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 20px;
    margin-top: 5px;
}

.status-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
}

.status-text {
    font-size: 0.9rem;
    color: #64748b;
    white-space: nowrap;
}

/* プログレスバー */
.progress-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 400px;
}

.progress-bar-bg {
    flex-grow: 1;
    height: 8px;
    background-color: var(--progress-bg);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background-color: var(--progress-fill);
    transition: width 0.1s linear;
}

.progress-percent {
    font-size: 0.8rem;
    font-family: monospace;
    color: var(--text);
    min-width: 40px;
    text-align: right;
}

button#generateBtn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 6px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
    white-space: nowrap;
}

button#generateBtn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

button#generateBtn:disabled {
    background-color: #94a3b8;
    cursor: wait;
    transform: none;
}

/* 結果表示エリア */
.results-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.result-card {
    background: var(--surface);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.card-header {
    background: var(--accent-bg);
    padding: 10px 15px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.badge {
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: bold;
    font-size: 0.75rem;
}
.badge.perfect { background: #dcfce7; color: #166534; }
.badge.good { background: #dbeafe; color: #1e40af; }

.preview-box {
    background: #1e1e1e;
    color: #e0e0e0;
    padding: 20px;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 140px;
    overflow: auto;
}

.preview-content {
    font-family: "Menlo", "Consolas", "Monaco", monospace;
    font-size: 14px;
    line-height: 1.1;
    letter-spacing: 0.1em;
    white-space: pre;
    text-align: left;
}

.card-actions {
    padding: 10px 15px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.error-info {
    font-size: 0.75rem;
    color: #ef4444;
    font-weight: bold;
}

.copy-btn {
    background: white;
    border: 1px solid #cbd5e1;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: background 0.1s;
    color: #333;
}
.copy-btn:hover { background: #f1f5f9; }

@media (max-width: 600px) {
    .input-block-row { flex-direction: column; }
    .controls-wrapper { flex-direction: column; align-items: stretch; gap: 15px; }
    .control-group.border-left { padding-left: 0; border-left: none; padding-top: 10px; border-top: 1px solid var(--border); width: 100%; }
    .action-area { flex-direction: column; align-items: stretch; }
    .progress-container { max-width: 100%; }
}