/**
 * SEO WRITING SUPPORT - 統合CSSファイル
 * 最適化・効率化・重複削除版（2025-12-19）
 * 
 * 旧構成: style.css + style-responsive.css + style-theme.css + style-fullwidth.css + style-flat.css
 * 新構成: このファイルのみ（約65%削減）
 */

/* ===========================
   CSS Variables（カラースキーム）
   =========================== */
:root {
    /* メインカラー */
    --primary-color: #04384c;
    --primary-hover: #032a39;
    --primary-light: rgba(5, 70, 95, 0.61);
    --primary-pale: rgba(5, 70, 95, 0.05);
    
    /* テキストカラー */
    --text-primary: #333;
    --text-secondary: #666;
    --text-muted: #999;
    --text-white: #ffffff;
    
    /* リンクカラー */
    --link-color: #1176d4;
    --link-hover: #0e5fa8;
    
    /* 背景カラー */
    --bg-body: #fdfdfd;
    --bg-white: #ffffff;
    --bg-gray-light: #f7f7f7;
    --bg-gray: #e9ecef;
    
    /* ボーダーカラー */
    --border-color: #e0e0e0;
    --border-dark: #cccccc;
    
    /* アクセントカラー */
    --accent-blue: #3d79d5;
    --accent-green: #63a84d;
    --accent-orange: #f09f4d;
    --accent-red: #e44141;
    
    /* 警告・情報カラー */
    --info-bg: #f3f8fd;
    --info-border: #3d79d5;
    --warning-bg: #fff5f0;
    --warning-border: #ffa537;
    --success-bg: #f1f9ee;
    --success-border: #63a84d;
    
    /* シャドウ */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    /* ボーダー半径 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* ===========================
   CSS Reset
   =========================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

ol,
ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* ===========================
   Base Styles
   =========================== */
body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background: var(--primary-color);
    color: var(--text-white);
    line-height: 1.7;
    min-height: 100vh;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--link-hover);
}

/* ===========================
   Container & Layout
   =========================== */
.container {
    max-width: 100%;
    padding: 0;
}

.main-content {
    padding: 2rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

/* ===========================
   Header
   =========================== */
.header {
    background: transparent;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    padding: 2rem 1.5rem;
    text-align: center;
}

.header h1 {
    color: var(--text-white);
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
}

.header .subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    margin: 0;
}

/* ===========================
   Breadcrumb
   =========================== */
.breadcrumb {
    background: transparent;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    list-style: none !important;
    font-size: 0.875rem;
}

.breadcrumb-item {
    display: inline-flex;
    align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    padding: 0 0.5rem;
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb-item a:hover {
    color: var(--text-white);
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--text-white);
    font-weight: 600;
}

/* ===========================
   Overview Section（ツール概要）
   =========================== */
.overview-section {
    background: transparent;
    color: var(--text-white);
    padding: 2.5rem 0;
    margin: 0 1.5rem 2rem;
}

.overview-section h2 {
    color: var(--text-white);
    font-size: 1.75rem;
    margin: 0 0 1.5rem;
    font-weight: 700;
}

.overview-section .description {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.feature-item {
    padding: 1.5rem 0;
}

.feature-item .icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    display: block;
}

.feature-item .title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-white);
}

.feature-item .text {
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0.9;
}

.quick-start {
    padding: 1.5rem 0 0;
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    margin-top: 1.5rem;
}

.quick-start h3 {
    color: var(--text-white);
    font-size: 1.25rem;
    margin: 0 0 1rem;
}

.quick-start ol {
    list-style: none;
    counter-reset: step-counter;
}

.quick-start ol li {
    counter-increment: step-counter;
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    line-height: 1.6;
}

.quick-start ol li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.75rem;
    height: 1.75rem;
    background: var(--text-white);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

/* ===========================
   Card Components
   =========================== */
.form-card,
.ai-card,
.url-card,
.guide-card {
    background: transparent !important;
    box-shadow: none !important;
    border: none !important;
    padding: 2rem 0 !important;
    margin: 0 1.5rem 2rem;
}

.history-card {
    background: rgba(255, 255, 255, 0.95) !important;
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin: 0 1.5rem 2rem;
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
}

.form-card h2,
.ai-card h2,
.url-card h3 {
    color: var(--text-white) !important;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    font-size: 1.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    font-weight: 700;
}

.history-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin: 0 0 1.5rem;
    font-weight: 700;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
}

/* ===========================
   Form Elements
   =========================== */
.search-form {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.form-group {
    background: none !important;
    padding: 2rem 0 !important;
    border-radius: 0;
    margin-bottom: 0;
    box-shadow: none !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group:last-child {
    border-bottom: none;
}

.form-label {
    color: rgba(255, 255, 255, 0.95) !important;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.label-icon {
    font-size: 1.2rem;
}

.required {
    color: #ff6b6b;
    font-size: 0.85rem;
    background: rgba(255, 107, 107, 0.15);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.form-input,
.form-select,
.form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95) !important;
    color: var(--text-primary);
}

.form-input:focus,
.form-select:focus,
.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(4, 56, 76, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-help {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
    font-style: italic;
}

/* 地域警告 */
.region-warning,
.region-notice {
    color: rgba(255, 255, 255, 0.95) !important;
    font-size: 0.95rem !important;
    margin: 0.75rem 0 1rem !important;
    line-height: 1.7 !important;
    font-weight: 500 !important;
    background: rgba(0, 0, 0, 0.25) !important;
    padding: 0.75rem 1rem !important;
    border-radius: var(--radius-sm) !important;
    border-left: 3px solid rgba(255, 193, 7, 0.8) !important;
}

/* 座標表示 */
.coordinates-display {
    background: rgba(0, 0, 0, 0.3) !important;
    padding: 0.875rem 1.25rem !important;
    border-radius: var(--radius-sm);
    margin-top: 1rem !important;
    font-size: 1rem !important;
    color: rgba(255, 255, 255, 0.95) !important;
    font-family: 'Courier New', monospace;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    font-weight: 500;
}

/* ===========================
   Radio & Checkbox
   =========================== */
.radio-group,
.checkbox-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.radio-label,
.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.15) !important;
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.95) !important;
    transition: all 0.3s ease;
}

.radio-label:hover,
.checkbox-label:hover {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.5);
}

.radio-label:has(input:checked),
.checkbox-label:has(input:checked) {
    background: rgba(255, 255, 255, 0.95) !important;
    border-color: var(--primary-color);
    color: var(--primary-color) !important;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(4, 56, 76, 0.2);
}

.radio-label input[type="radio"],
.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.radio-custom,
.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid currentColor;
    border-radius: 50%;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-custom {
    border-radius: var(--radius-sm);
}

input[type="radio"]:checked + .radio-custom,
input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

/* ===========================
   Buttons
   =========================== */
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: #ffffff;
    color: var(--primary-color);
    border: 2px solid #ffffff;
    box-shadow: 0 2px 12px rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(255, 255, 255, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(4, 56, 76, 0.3);
}

.btn-ai {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    font-size: 1.1rem;
    padding: 1.25rem 2.5rem;
}

.btn-ai:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-ai:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-small {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(4, 56, 76, 0.25);
}

.btn-small:hover {
    background: #02324a;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(4, 56, 76, 0.35);
}

.btn-store {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: var(--text-white);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    margin: 1rem 0;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-store:hover {
    background: #02324a;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
    color: var(--text-white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-copy {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    color: white;
    flex: 1;
}

.btn-copy:hover {
    background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-ai-open {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    flex: 1;
}

.btn-ai-open:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-icon {
    font-size: 1.2rem;
}

/* ===========================
   AI Analysis Section
   =========================== */
.ai-analysis-section {
    margin-bottom: 2rem;
}

.ai-description {
    color: rgba(255, 255, 255, 0.9) !important;
    font-size: 1rem;
    line-height: 1.8;
}

.ai-select-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.ai-option {
    background: rgba(255, 255, 255, 0.15) !important;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
    color: rgba(255, 255, 255, 0.95) !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 100px;
    justify-content: center;
}

.ai-option:hover {
    background: rgba(255, 255, 255, 0.25) !important;
    border-color: rgba(255, 255, 255, 0.5);
}

.ai-option:has(input:checked) {
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.95) !important;
    color: var(--primary-color) !important;
    box-shadow: 0 2px 12px rgba(4, 56, 76, 0.2);
}

.ai-option small {
    color: inherit !important;
    opacity: 0.8;
    font-size: 0.75rem;
}

.ai-logo {
    font-size: 2rem;
    margin: 0.5rem 0;
}

.ai-logo img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

/* Extension Guide */
.extension-guide {
    background: none !important;
    border: none !important;
    padding: 0;
    margin: 2rem 0;
}

.extension-guide .warning-box,
.extension-guide .install-steps,
.extension-guide .info-box {
    background: none !important;
    border: none !important;
    padding: 1rem 0 !important;
    margin: 2rem 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
}

.extension-guide h4 {
    color: rgba(255, 255, 255, 0.95) !important;
    margin-top: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.extension-guide p,
.extension-guide li,
.extension-guide strong {
    color: rgba(255, 255, 255, 0.95) !important;
}

.extension-guide .step-note,
.extension-guide .note {
    color: rgba(255, 255, 255, 0.7) !important;
    font-size: 0.9rem;
    font-style: italic;
}

.extension-guide ol,
.extension-guide ul {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.extension-guide li {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.extension-guide li strong {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.05rem;
}

.extension-guide a:not(.btn):not(.btn-store) {
    color: #66b3ff !important;
    text-decoration: underline;
}

.extension-guide a:not(.btn):not(.btn-store):hover {
    color: #99ccff !important;
}

/* Extension Status */
.extension-status {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.status-checking {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-installed {
    color: var(--accent-green);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-not-installed {
    color: var(--accent-red);
    font-weight: 600;
}

.spinner-small {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--bg-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Analysis Status */
.analysis-status {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    box-shadow: var(--shadow-md);
}

.analysis-status.success {
    border-left: 4px solid #28a745;
}

.analysis-status.error {
    border-left: 4px solid #dc3545;
}

.status-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#statusMessage {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* Analysis Result */
.analysis-result {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
}

.analysis-result h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--bg-gray);
}

/* Info Box - 基本スタイル */
.info-box {
    background: var(--bg-gray-light);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
}

.info-box p,
.info-box li,
.info-box strong {
    color: var(--text-primary);
    line-height: 1.8;
}

.info-box h4 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.info-box ol {
    padding-left: 1.5rem;
    margin: 1rem 0;
    list-style: decimal;
}

.info-box ol li {
    padding-left: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.8;
}

/* Analysis Result内のinfo-box - 白背景用の強化スタイル */
.analysis-result .info-box {
    background: var(--bg-gray-light) !important;
    border: 1px solid var(--border-color) !important;
    border-left: 4px solid var(--primary-color) !important;
    padding: 1.5rem !important;
    margin: 1.5rem 0 !important;
    border-radius: var(--radius-md) !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.analysis-result .info-box p,
.analysis-result .info-box li,
.analysis-result .info-box strong {
    color: var(--text-primary) !important;
    line-height: 1.8;
}

.analysis-result .info-box h4 {
    color: var(--primary-color) !important;
    border-bottom: 2px solid var(--primary-color);
}

.analysis-result .info-box ol {
    padding-left: 1.5rem !important;
    margin: 1rem 0 !important;
    list-style: decimal !important;
}

.analysis-result .info-box ol li {
    padding-left: 0.5rem !important;
    margin-bottom: 0.75rem !important;
    list-style: decimal !important;
    color: var(--text-primary) !important;
    line-height: 1.8;
}

.analysis-result .info-box ol li::before {
    content: none !important;
}

.site-preview {
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: 1.5rem;
}

.site-item {
    background: var(--bg-gray-light);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--primary-color);
}

.site-rank {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.site-rank.top3 {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.site-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.site-url {
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.875rem;
    word-break: break-all;
    display: block;
    margin-bottom: 0.5rem;
}

.site-url:hover {
    text-decoration: underline;
}

.site-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.site-meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Prompt Preview */
.prompt-preview-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-gray-light);
    border-radius: var(--radius-md);
    border: 2px solid var(--primary-color);
}

.prompt-preview-section h4 {
    font-size: 1.125rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.prompt-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.prompt-preview-textarea {
    width: 100%;
    min-height: 300px;
    max-height: 500px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    background: white;
    color: var(--text-primary);
    resize: vertical;
    overflow-y: auto;
}

.prompt-preview-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.prompt-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    font-style: italic;
}

.prompt-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.progress-info {
    margin-top: 1rem;
    padding: 1rem;
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--bg-gray);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.75rem 0;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981 0%, #059669 100%);
    transition: width 0.3s ease;
    border-radius: 4px;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
}

.result-summary {
    background: var(--bg-gray-light);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    border-left: 4px solid var(--success-border);
}

.result-summary-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.result-summary-item:last-child {
    border-bottom: none;
}

.result-summary-label {
    font-weight: 600;
    color: var(--text-primary);
}

.result-summary-value {
    color: var(--text-secondary);
}

/* Info Box & AI Guide */
.info-box,
.ai-guide {
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
    margin: 1rem 0 !important;
}

.info-box h4,
.ai-guide h4 {
    color: var(--text-white) !important;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    padding-bottom: 0.5rem;
    margin: 1.5rem 0 1rem 0;
}

.info-box li,
.ai-guide li,
.info-box p,
.ai-guide p {
    color: rgba(255, 255, 255, 0.95) !important;
    line-height: 1.8;
}

.info-box strong,
.ai-guide strong {
    color: var(--text-white) !important;
    font-weight: 700;
}

.info-box ul,
.ai-guide ul {
    padding-left: 0;
    margin: 1rem 0;
    list-style: none;
}

.info-box ul li,
.ai-guide ul li {
    position: relative;
    padding-left: 2rem !important;
    margin-bottom: 1rem;
}

.info-box > ul > li::before,
.ai-guide > ul > li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: rgba(255, 255, 255, 0.7);
    font-weight: bold;
    font-size: 1.1rem;
}

/* Nested Lists */
.info-box ul ul,
.ai-guide ul ul {
    margin-top: 0.75rem !important;
    margin-bottom: 0.75rem !important;
    padding: 0.75rem 1rem 0.75rem 2.5rem !important;
    list-style: none;
    background: rgba(0, 0, 0, 0.15) !important;
    border-left: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
}

.info-box ul ul li,
.ai-guide ul ul li {
    position: relative;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem !important;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9) !important;
}

.info-box ul ul li::before,
.ai-guide ul ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.2rem;
    line-height: 1.5;
}

.info-box ul ul li:last-child,
.ai-guide ul ul li:last-child {
    margin-bottom: 0;
}

/* ===========================
   URL Display Section
   =========================== */
.url-section {
    animation: fadeIn 0.5s ease-out;
}

.url-display-item {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    border-left: 4px solid rgba(255, 255, 255, 0.5);
}

.url-display-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.url-display-item a {
    display: block;
    color: #66b3ff;
    text-decoration: none;
    word-break: break-all;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
}

.url-display-item a:hover {
    text-decoration: underline;
    background: rgba(255, 255, 255, 0.1);
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* ===========================
   Search History
   =========================== */
.history-section {
    margin-top: 2rem;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.history-list {
    max-height: 400px;
    overflow-y: auto;
}

.history-list::-webkit-scrollbar {
    width: 8px;
}

.history-list::-webkit-scrollbar-track {
    background: var(--bg-gray);
    border-radius: var(--radius-md);
}

.history-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-md);
}

.history-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.history-item {
    padding: 1rem;
    background: var(--bg-gray-light);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.history-item:hover {
    background: var(--bg-gray);
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.history-keyword {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.history-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.history-details {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.history-detail-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.empty-message {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
    font-style: italic;
}

/* ===========================
   Footer
   =========================== */
.l-footer {
    background: rgba(0, 0, 0, 0.2) !important;
    color: var(--text-white) !important;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 3rem;
}

.l-footer__inner {
    width: 100%;
}

.l-footer__foot {
    padding: 2rem 0;
}

.l-footer__foot .l-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.l-footer__nav {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.l-footer__nav li {
    margin: 0;
}

.l-footer__nav a {
    color: rgba(255, 255, 255, 0.8) !important;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.l-footer__nav a:hover {
    color: var(--text-white) !important;
}

.copyright {
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    margin: 0;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

/* ===========================
   Responsive Design
   =========================== */

/* Tablet (768px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .main-content {
        padding: 2rem 0;
    }

    .form-card,
    .ai-card,
    .url-card,
    .history-card,
    .overview-section {
        margin-left: 2rem;
        margin-right: 2rem;
    }

    .ai-select-group {
        gap: 1rem;
    }

    .ai-option {
        min-width: calc(50% - 0.5rem);
    }
}

/* Mobile (max 768px) */
@media (max-width: 768px) {
    .header {
        padding: 1.5rem 1rem;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 0.875rem;
    }

    .breadcrumb {
        padding: 0.5rem 1rem;
    }

    .breadcrumb-list {
        font-size: 0.75rem;
    }

    .main-content {
        padding: 1.5rem 0;
    }

    .form-card,
    .ai-card,
    .url-card,
    .history-card,
    .overview-section {
        margin-left: 1rem;
        margin-right: 1rem;
        padding: 1.75rem 0 !important;
    }

    .history-card {
        padding: 1.5rem !important;
    }

    .overview-section h2 {
        font-size: 1.4rem;
    }

    .overview-section .description {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-item {
        padding: 1rem 0;
    }

    .feature-item .icon {
        font-size: 1.75rem;
        margin-bottom: 0.5rem;
    }

    .feature-item .title {
        font-size: 1rem;
    }

    .feature-item .text {
        font-size: 0.875rem;
    }

    .quick-start {
        padding: 1.25rem 0 0;
        margin-top: 1.25rem;
    }

    .quick-start h3 {
        font-size: 1.1rem;
    }

    .quick-start ol li {
        font-size: 0.875rem;
        padding-left: 2.25rem;
        margin-bottom: 0.625rem;
    }

    .quick-start ol li::before {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.75rem;
    }

    .form-card h2,
    .ai-card h2 {
        font-size: 1.5rem;
    }

    .form-group {
        padding: 1.25rem 0 !important;
    }

    .form-label {
        font-size: 0.9rem;
    }

    .form-input,
    .form-select {
        font-size: 1rem;
        padding: 0.75rem;
    }

    .btn {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
    }

    .form-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .form-actions .btn {
        width: 100%;
    }

    .radio-group,
    .checkbox-group {
        flex-direction: column;
        gap: 0.75rem;
    }

    .radio-label,
    .checkbox-label {
        padding: 0.875rem;
        font-size: 0.9rem;
    }

    .ai-select-group {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .extension-guide {
        padding: 1rem 0;
    }

    .extension-guide .btn-store {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
        width: 100%;
        justify-content: center;
    }

    .url-display-item {
        padding: 1rem;
    }

    .url-display-item h4 {
        font-size: 0.95rem;
    }

    .url-display-item a {
        font-size: 0.875rem;
    }

    .history-item {
        padding: 0.875rem;
        font-size: 0.875rem;
    }

    .prompt-preview-textarea {
        font-size: 0.8rem;
        min-height: 200px;
    }

    .prompt-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

    .prompt-actions .btn {
        width: 100%;
    }

    .history-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
}

/* Small Mobile (max 480px) */
@media (max-width: 480px) {
    .header h1 {
        font-size: 1.25rem;
    }

    .header .subtitle {
        font-size: 0.875rem;
    }

    .breadcrumb-list {
        font-size: 0.7rem;
    }

    .main-content {
        padding: 1rem 0;
    }

    .form-card,
    .ai-card,
    .url-card,
    .history-card,
    .overview-section {
        margin-left: 0.75rem;
        margin-right: 0.75rem;
    }

    .history-card {
        padding: 1.25rem !important;
    }

    .overview-section {
        padding: 1.5rem 0 !important;
    }

    .overview-section h2 {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .overview-section .description {
        font-size: 0.9rem;
        margin-bottom: 1.25rem;
    }

    .feature-item {
        padding: 0.875rem 0;
    }

    .form-card h2,
    .ai-card h2 {
        font-size: 1.125rem;
    }

    .form-group {
        padding: 1rem 0 !important;
    }

    .form-label {
        font-size: 0.875rem;
    }

    .btn {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

    .extension-guide .btn-store {
        font-size: 0.8rem;
        padding: 0.5rem 0.875rem;
    }

    .history-details {
        flex-direction: column;
        gap: 0.25rem;
    }

    .l-footer__nav {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
}

/* Large Screen (min 1400px) */
@media (min-width: 1400px) {
    .main-content {
        max-width: 1400px;
    }
}

/* Print Styles */
@media print {
    .breadcrumb,
    .btn,
    .form-actions,
    .extension-guide {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .container {
        max-width: 100%;
    }

    .form-card,
    .ai-card,
    .history-card {
        background: white !important;
        color: black !important;
        border: 1px solid #ccc !important;
    }
}