/* SEO Meta Tag Analyzer - style.css */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --primary:#00b894;--primary-dark:#00a381;--accent:#6c5ce7;
    --bg:#f0f2f5;--card:#fff;--text:#2d3436;--text-light:#636e72;
    --border:#dfe6e9;--radius:12px;--shadow:0 2px 16px rgba(0,0,0,0.07);
    --good:#00b894;--warn:#fdcb6e;--bad:#ff7675;
}
.dark{--bg:#1a1a2e;--card:#16213e;--text:#e0e0e0;--text-light:#a0a0b0;--border:#2a2a4a;--shadow:0 2px 16px rgba(0,0,0,0.3)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans JP',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;transition:background 0.3s,color 0.3s}

header{background:linear-gradient(135deg,#00b894 0%,#00cec9 50%,#6c5ce7 100%);color:#fff;padding:2.5rem 1rem 2rem}
.header-inner{max-width:1100px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.header-inner>div{text-align:left}
header h1{font-size:2.2rem;font-weight:800;letter-spacing:-0.02em}
header p{opacity:0.9;margin-top:0.4rem;font-size:1.05rem}
.dark-toggle{background:rgba(255,255,255,0.15);border:2px solid rgba(255,255,255,0.3);border-radius:50%;width:44px;height:44px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;transition:background 0.2s;flex-shrink:0}
.dark-toggle:hover{background:rgba(255,255,255,0.25)}
.dark textarea{background:var(--card);color:var(--text);border-color:var(--border)}
.dark .btn-secondary{background:var(--card);color:var(--primary)}
.dark .serp-preview{background:var(--card);border-color:var(--border)}
.dark .check-item.pass{background:#1a2e1a}.dark .check-item.warn{background:#2e2a1a}.dark .check-item.fail{background:#2e1a1a}

main{max-width:1100px;margin:2rem auto;padding:0 1rem;display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.panel{background:var(--card);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow)}
.panel h2{font-size:1.15rem;margin-bottom:1rem;padding-bottom:0.5rem;border-bottom:2px solid var(--primary);color:var(--primary)}

.hint{font-size:0.83rem;color:var(--text-light);margin-bottom:0.7rem}

textarea{width:100%;padding:0.7rem;border:2px solid var(--border);border-radius:8px;font-family:'Consolas','Courier New',monospace;font-size:0.85rem;resize:vertical;transition:border-color 0.2s;line-height:1.5}
textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,184,148,0.12)}

.input-actions{display:flex;gap:0.7rem;margin-top:1rem}
.btn-primary,.btn-secondary{flex:1;padding:0.75rem;border-radius:8px;font-size:0.95rem;font-weight:700;cursor:pointer;transition:all 0.2s;font-family:inherit;border:2px solid var(--primary)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#fff;color:var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff}
.usage{text-align:center;font-size:0.82rem;color:var(--text-light);margin-top:0.8rem}

/* Score Circle */
.score-circle{width:120px;height:120px;border-radius:50%;border:8px solid var(--border);display:flex;flex-direction:column;justify-content:center;align-items:center;margin:0 auto 1.5rem}
.score-circle.good{border-color:var(--good)}
.score-circle.warn{border-color:var(--warn)}
.score-circle.bad{border-color:var(--bad)}
.score-number{font-size:2.2rem;font-weight:800;line-height:1}
.score-label{font-size:0.75rem;color:var(--text-light);margin-top:2px}

/* SERP Preview */
.serp-preview{background:#fff;border:1px solid #ddd;border-radius:8px;padding:1rem;margin-bottom:1.5rem}
.serp-title{color:#1a0dab;font-size:1.1rem;font-weight:600;cursor:pointer;margin-bottom:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.serp-title:hover{text-decoration:underline}
.serp-url{color:#006621;font-size:0.82rem;margin-bottom:4px}
.serp-desc{color:#545454;font-size:0.88rem;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* Check Items */
.check-item{padding:0.8rem;border-radius:8px;margin-bottom:0.6rem;border-left:4px solid var(--border)}
.check-item.pass{border-left-color:var(--good);background:#f0fff4}
.check-item.warn{border-left-color:var(--warn);background:#fffdf0}
.check-item.fail{border-left-color:var(--bad);background:#fff5f5}
.check-label{font-size:0.88rem;font-weight:700;margin-bottom:2px}
.check-detail{font-size:0.8rem;color:var(--text-light);line-height:1.5}
.check-value{font-size:0.78rem;color:var(--text-light);margin-top:2px;font-family:monospace;word-break:break-all;max-height:2.4em;overflow:hidden}

/* Check Summary */
.check-summary{display:flex;gap:1rem;padding:0.8rem 1rem;background:var(--bg);border-radius:8px;margin-bottom:1rem;font-size:0.88rem;font-weight:700;align-items:center;flex-wrap:wrap}
.summary-pass{color:var(--good)}
.summary-warn{color:#e17055}
.summary-fail{color:var(--bad)}

/* Results Actions */
.results-actions{display:flex;justify-content:flex-end;margin-top:1rem;padding-top:0.8rem;border-top:1px solid var(--border)}
.results-actions .btn-secondary{flex:none;padding:0.5rem 1.2rem;font-size:0.85rem}

/* Score animation */
.score-circle{transition:border-color 0.5s ease}
.score-number{transition:color 0.3s ease}
.score-circle.good .score-number{color:var(--good)}
.score-circle.warn .score-number{color:#e17055}
.score-circle.bad .score-number{color:var(--bad)}

/* Disabled button */
.btn-primary:disabled{background:var(--border);border-color:var(--border);cursor:not-allowed;color:var(--text-light)}

/* Premium */
.premium-banner{max-width:1100px;margin:2rem auto;padding:2rem 1.5rem;background:linear-gradient(135deg,#00b894,#6c5ce7);color:#fff;border-radius:var(--radius);text-align:center;box-shadow:0 4px 20px rgba(0,184,148,0.25)}
.premium-banner h2{font-size:1.4rem;margin-bottom:1rem}
.pro-features{display:flex;justify-content:center;flex-wrap:wrap;gap:0.6rem;margin-bottom:1.5rem}
.pro-features span{background:rgba(255,255,255,0.2);padding:0.35rem 0.8rem;border-radius:20px;font-size:0.85rem}
.pro-features span::before{content:"\2713 "}
.btn-premium{padding:0.8rem 2.5rem;background:#fff;color:var(--primary);border:none;border-radius:8px;font-size:1rem;font-weight:700;cursor:pointer}
.btn-premium:hover{transform:scale(1.03)}

/* Input Tabs */
.input-tabs{display:flex;gap:0;margin-bottom:1rem;border-bottom:2px solid var(--border)}
.input-tab{padding:0.6rem 1.2rem;background:none;border:none;font-size:0.9rem;font-weight:600;color:var(--text-light);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all 0.2s;font-family:inherit}
.input-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.input-tab:hover{color:var(--primary)}
.url-input{width:100%;padding:0.8rem;border:2px solid var(--border);border-radius:8px;font-size:1rem;transition:border-color 0.2s;font-family:inherit;background:var(--card);color:var(--text)}
.url-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,184,148,0.12)}
.url-status{padding:0.5rem 0.8rem;border-radius:6px;font-size:0.82rem;margin-top:0.5rem}
.url-status.loading{background:#e3f2fd;color:#1565c0}
.url-status.error{background:#ffebee;color:#c62828}
.url-status.success{background:#e8f5e9;color:#2e7d32}
.dark .url-status.loading{background:#1a2a4a;color:#64b5f6}
.dark .url-status.error{background:#3a1a1a;color:#ef9a9a}
.dark .url-status.success{background:#1a3a1a;color:#81c784}

/* Character Count Bars */
.char-bars{margin-bottom:1.2rem}
.char-bar-row{display:flex;align-items:center;gap:0.5rem;margin-bottom:0.4rem}
.char-bar-label{font-size:0.75rem;font-weight:600;width:80px;text-align:right;color:var(--text-light)}
.char-bar-track{flex:1;height:8px;background:var(--border);border-radius:4px;overflow:hidden}
.char-bar-fill{height:100%;border-radius:4px;transition:width 0.5s,background 0.3s}
.char-bar-fill.optimal{background:var(--good)}
.char-bar-fill.short{background:var(--warn)}
.char-bar-fill.long{background:var(--bad)}
.char-bar-count{font-size:0.72rem;width:55px;color:var(--text-light);font-family:monospace}

/* Preview Tabs */
.preview-tabs{display:flex;gap:0;margin-bottom:0.8rem;border-bottom:1px solid var(--border)}
.preview-tab{padding:0.4rem 1rem;background:none;border:none;font-size:0.82rem;font-weight:600;color:var(--text-light);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all 0.2s;font-family:inherit}
.preview-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.preview-tab:hover{color:var(--primary)}

.ad-space{max-width:1100px;margin:1rem auto;padding:0.8rem;background:#e9ecef;text-align:center;border-radius:8px;color:#adb5bd;font-size:0.78rem;min-height:60px;display:flex;align-items:center;justify-content:center}
.ad-space::after{content:"Ad Space (Google AdSense)"}
/* OGP Preview */
.ogp-preview,.twitter-preview{margin-bottom:1.5rem}
.ogp-card,.tw-card{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--card)}
.ogp-image,.tw-image{background:#e0e0e0;height:160px;display:flex;align-items:center;justify-content:center;color:#999;font-size:0.85rem;font-weight:600;background-size:cover;background-position:center}
.ogp-body,.tw-body{padding:0.8rem 1rem}
.ogp-site,.tw-domain{font-size:0.72rem;color:var(--text-light);text-transform:uppercase;margin-bottom:2px}
.ogp-title,.tw-title{font-size:0.95rem;font-weight:700;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ogp-desc,.tw-desc{font-size:0.8rem;color:var(--text-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.dark .ogp-card,.dark .tw-card{border-color:var(--border);background:var(--card)}
.dark .ogp-image,.dark .tw-image{background:#2a2a4a;color:#666}

/* History Section */
.history-section{max-width:1100px;margin:2rem auto;padding:0 1rem}
.history-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}
.history-header h2{font-size:1.2rem;color:var(--text)}
.btn-small{padding:0.3rem 0.8rem;font-size:0.78rem;background:var(--card);color:var(--text-light);border:1px solid var(--border);border-radius:6px;cursor:pointer;font-family:inherit}
.btn-small:hover{background:var(--border)}
.history-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:0.8rem}
.history-item{background:var(--card);border-radius:8px;padding:0.8rem 1rem;box-shadow:var(--shadow);cursor:pointer;transition:transform 0.15s;border-left:4px solid var(--primary)}
.history-item:hover{transform:translateY(-2px)}
.history-item .hi-url{font-size:0.78rem;color:var(--text-light);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-bottom:4px}
.history-item .hi-score{font-size:1.3rem;font-weight:800;margin-right:0.5rem}
.history-item .hi-score.good{color:var(--good)}
.history-item .hi-score.warn{color:#e17055}
.history-item .hi-score.bad{color:var(--bad)}
.history-item .hi-date{font-size:0.72rem;color:var(--text-light)}
.history-item .hi-meta{display:flex;align-items:center;gap:0.5rem}

/* Why Section */
.why-section{max-width:1100px;margin:2.5rem auto;padding:0 1rem}
.why-section h2{text-align:center;font-size:1.5rem;margin-bottom:1.5rem;color:var(--text)}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.why-card{background:var(--card);padding:1.5rem;border-radius:var(--radius);box-shadow:var(--shadow);border-left:4px solid var(--primary)}
.why-card h3{font-size:1rem;color:var(--primary);margin-bottom:0.5rem}
.why-card p{font-size:0.9rem;color:var(--text-light);line-height:1.7}
.feedback-section{max-width:600px;margin:2rem auto;text-align:center;padding:0 1rem}
.feedback-section h2{font-size:1.2rem;margin-bottom:0.5rem}
.feedback-section p{font-size:0.9rem;color:var(--text-light);margin-bottom:1rem}
.btn-feedback{display:inline-block;padding:0.6rem 2rem;background:var(--card);color:var(--primary);border:2px solid var(--primary);border-radius:8px;text-decoration:none;font-weight:600;font-size:0.9rem;transition:all 0.2s}
.btn-feedback:hover{background:var(--primary);color:#fff}

footer{text-align:center;padding:2rem 1rem;color:var(--text-light);font-size:0.83rem}
footer a{color:var(--primary);text-decoration:none}

@media(max-width:900px){
    .why-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    main{grid-template-columns:1fr;gap:1.2rem}
    header{padding:1.8rem 1rem 1.5rem}
    header h1{font-size:1.6rem}
    .pro-features{flex-direction:column;align-items:center}
    .why-grid{grid-template-columns:1fr}
    .header-inner{flex-direction:row;gap:0.5rem}
    .history-list{grid-template-columns:1fr}
    .results-actions{flex-wrap:wrap;gap:0.5rem}
}
@media(max-width:480px){.panel{padding:1rem}.input-actions{flex-direction:column}}
.skip-to-content{position:absolute;top:-100%;left:0;background:var(--accent,#4a6cf7);color:#fff;padding:8px 16px;z-index:10000;font-size:.9rem;border-radius:0 0 4px 0;transition:top .2s}.skip-to-content:focus{top:0}