:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
}

body {
    font-family: "Inter", system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    margin: 0;
    line-height: 1.5;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    margin-bottom: 40px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 20px;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 30px;
    align-items: start;
}

.step-section {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.step-title {
    font-size: 1.25rem;
    color: var(--primary);
    margin-top: 0;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.field-group {
    margin-bottom: 24px;
}

.field-label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 10px;
    display: block;
    color: var(--text-main);
}

.genre-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: block;
}

/* チップスタイルのチェックボックス */
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    cursor: pointer;
    background: #f1f5f9;
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all 0.2s;
    user-select: none;
}

.chip:hover {
    background: #e2e8f0;
}

.chip input {
    display: none;
}

.chip:has(input:checked) {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* スライダー */
.slider-wrap {
    display: flex;
    align-items: center;
    gap: 15px;
}
input[type="range"] {
    flex: 1;
}
.slider-val {
    min-width: 50px;
    font-family: monospace;
    font-weight: bold;
}

/* テキスト入力 */
input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    box-sizing: border-box;
}

/* プレビューサイドバー */
.preview-sidebar {
    position: sticky;
    top: 20px;
}

.sticky-card {
    background: #1e293b;
    color: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.3);
}

.prompt-display {
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    padding: 15px;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 0.9rem;
    min-height: 200px;
    max-height: 500px;
    overflow-y: auto;
    white-space: pre-wrap;
    margin: 15px 0;
    border: 1px solid rgba(255,255,255,0.1);
}

.primary-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}

.primary-btn:hover {
    background: var(--primary-hover);
}

.safety-note {
    font-size: 0.75rem;
    color: #94a3b8;
    margin-top: 15px;
    text-align: center;
}