/* ===== Variables ===== */
:root{--primary:#667eea;--primary-dark:#5a67d8;--success:#34c759;--danger:#ff3b30;--warning:#ff9500;--bg:#f5f5f7;--card:#fff;--text:#1d1d1f;--text2:#86868b;--border:#e8e8ed;--radius:16px;--shadow:0 4px 24px rgba(0,0,0,.08)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--primary);text-decoration:none}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== Navbar ===== */
.navbar{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.nav-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:32px;height:60px}
.nav-logo{font-size:18px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px}
.nav-logo i{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:4px;flex:1}
.nav-links a{padding:6px 14px;border-radius:8px;color:var(--text2);font-size:14px;font-weight:500;transition:all .2s}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:rgba(102,126,234,.08)}
.nav-btn{padding:8px 18px;background:var(--primary);color:#fff;border-radius:10px;font-size:14px;font-weight:600;margin-left:auto;transition:all .2s}
.nav-btn:hover{background:var(--primary-dark);color:#fff}
.mobile-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;margin-left:auto}
@media(max-width:768px){.mobile-toggle{display:block}.nav-links{position:fixed;top:60px;left:0;right:0;background:var(--card);flex-direction:column;padding:16px;display:none;box-shadow:0 4px 12px rgba(0,0,0,.1)}.nav-links.show{display:flex}.nav-btn{margin-left:0;width:100%;text-align:center;margin-top:8px}}

/* ===== Hero ===== */
.hero{position:relative;padding:80px 24px;text-align:center;overflow:hidden;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}
.hero-bg{position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.hero-content{position:relative;z-index:1;max-width:700px;margin:0 auto}
.hero h1{font-size:52px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-1px}
.hero-sub{font-size:20px;color:rgba(255,255,255,.85);margin-bottom:8px}
.hero-desc{font-size:15px;color:rgba(255,255,255,.6);margin-bottom:32px}
.btn{padding:12px 28px;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;border:none;transition:all .2s;display:inline-flex;align-items:center;gap:8px}
.btn-primary{background:#fff;color:var(--primary)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.15)}
.btn-lg{padding:16px 40px;font-size:17px}
@media(max-width:768px){.hero h1{font-size:32px}}

/* ===== Stats ===== */
.stats-row{padding:40px 24px}
.stats-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-card{background:var(--card);border-radius:var(--radius);padding:28px;display:flex;align-items:center;gap:16px;box-shadow:var(--shadow)}
.stat-card i{font-size:32px;color:var(--primary);width:56px;height:56px;background:rgba(102,126,234,.1);border-radius:14px;display:flex;align-items:center;justify-content:center}
.stat-num{font-size:28px;font-weight:800;color:var(--text)}
.stat-label{font-size:13px;color:var(--text2)}
@media(max-width:768px){.stats-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== Query ===== */
.query-section{padding:60px 24px;max-width:700px;margin:0 auto}
.section-header{text-align:center;margin-bottom:40px}
.section-header h2{font-size:32px;font-weight:800;margin-bottom:8px}
.section-header p{color:var(--text2)}
.query-tabs{display:flex;gap:8px;justify-content:center;margin-bottom:24px}
.tab-btn{padding:10px 24px;border:1.5px solid var(--border);background:var(--card);border-radius:10px;font-size:14px;font-weight:500;cursor:pointer;color:var(--text2);transition:all .2s}
.tab-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.query-card{background:var(--card);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--text)}
.form-group input,.form-group select{width:100%;padding:12px 16px;border:1.5px solid var(--border);border-radius:10px;font-size:15px;outline:none;transition:border-color .2s;font-family:inherit}
.form-group input:focus{border-color:var(--primary)}
.btn-full{width:100%;justify-content:center}

/* ===== Result ===== */
.result-success,.result-error{border-radius:12px;padding:20px}
.result-success{background:rgba(52,199,89,.08);border:1px solid rgba(52,199,89,.2)}
.result-success i{font-size:24px;color:var(--success);display:block;margin-bottom:8px}
.result-success h4{font-size:16px;margin-bottom:8px;color:var(--success)}
.result-error{background:rgba(255,59,48,.08);border:1px solid rgba(255,59,48,.2)}
.result-error i{font-size:24px;color:var(--danger);display:block;margin-bottom:8px}
.result-error h4{font-size:16px;margin-bottom:8px}
.result-success p,.result-error p{margin-bottom:6px;font-size:14px;color:var(--text2)}
.result-success p strong,.result-error p strong{color:var(--text)}
.result-success code,.result-error code{background:rgba(0,0,0,.06);padding:2px 8px;border-radius:4px;font-family:monospace;font-size:13px}
.loading{text-align:center;padding:20px;color:var(--text2)}

/* ===== Features ===== */
.features-section{padding:60px 24px;max-width:1100px;margin:0 auto}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{background:var(--card);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);text-align:center;transition:transform .2s}
.feature-card:hover{transform:translateY(-4px)}
.feature-icon{width:60px;height:60px;border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:24px}
.feature-icon.blue{background:rgba(102,126,234,.1);color:var(--primary)}
.feature-icon.green{background:rgba(52,199,89,.1);color:var(--success)}
.feature-icon.purple{background:rgba(147,51,234,.1);color:#9333ea}
.feature-icon.orange{background:rgba(255,149,0,.1);color:var(--warning)}
.feature-icon.red{background:rgba(255,59,48,.1);color:var(--danger)}
.feature-icon.teal{background:rgba(20,184,166,.1);color:#14b8a6}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text2)}
@media(max-width:768px){.features-grid{grid-template-columns:repeat(2,1fr)}}

/* ===== Footer ===== */
.footer{background:var(--card);border-top:1px solid var(--border);padding:24px;text-align:center;color:var(--text2);font-size:14px;margin-top:60px}