/* ── Design Tokens ─────────────────────────────────── */
:root {
  --bg: #0a0e27;
  --bg2: #111636;
  --bg3: #1a1f3a;
  --border: #252a4a;
  --text: #e8eaf0;
  --text2: #8890b0;
  --accent: #3b82f6;
  --accent2: #06b6d4;
  --success: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', monospace;
}

/* ── Reset ────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-family:var(--font);color:var(--text);background:var(--bg);font-size:15px;line-height:1.6}
a{color:var(--accent);text-decoration:none}
button{cursor:pointer;font:inherit}
section{padding:80px 24px}

/* ── Particle Canvas ──────────────────────────────── */
#particles{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}
body>section,body>nav,body>footer{position:relative;z-index:1}

/* ── Navbar ───────────────────────────────────────── */
.navbar{position:fixed;top:0;left:0;width:100%;z-index:100;background:rgba(10,14,39,0.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 24px}
.nav-logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.1rem;color:var(--text)}
.nav-links{display:flex;gap:24px}
.nav-links a{color:var(--text2);font-size:.9rem;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.btn-outline-sm{background:transparent;border:1px solid var(--border);color:var(--text2);padding:6px 14px;border-radius:6px;font-size:.8rem}
.btn-outline-sm:hover{border-color:var(--accent);color:var(--accent)}

/* ── Hero ─────────────────────────────────────────── */
.hero{min-height:90vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding-top:80px}
.hero h1{font-size:clamp(2.2rem,5vw,3.5rem);font-weight:800;margin-bottom:16px}
.hero p{font-size:1.15rem;color:var(--text2);max-width:600px;margin-bottom:32px}
.gradient-text{background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-cta{display:flex;gap:16px;margin-bottom:48px}
.btn-gradient{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;padding:14px 32px;border-radius:var(--radius);font-size:1rem;font-weight:600;transition:transform .2s,box-shadow .2s}
.btn-gradient:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(59,130,246,0.3)}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text);padding:14px 32px;border-radius:var(--radius);font-size:1rem;font-weight:600;transition:border-color .2s}
.btn-outline:hover{border-color:var(--accent)}
.hero-stats{display:flex;gap:48px;margin-bottom:40px}
.hero-stat{text-align:center}
.hero-stat span{display:block;font-size:2rem;font-weight:700;color:var(--accent)}
.hero-stat small{color:var(--text2);font-size:.8rem}
.scroll-hint{color:var(--text2);font-size:.8rem;animation:bounce 2s infinite}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(10px)}}

/* ── Section Titles ───────────────────────────────── */
.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:12px}
.section-sub{text-align:center;color:var(--text2);margin-bottom:40px}

/* ── Features ─────────────────────────────────────── */
.feature-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:transform .2s,box-shadow .2s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,0.3)}
.feature-icon{font-size:2.5rem;margin-bottom:12px}
.feature-card h3{font-size:1.05rem;margin-bottom:8px}
.feature-card p{color:var(--text2);font-size:.9rem}

/* ── Plan Category ───────────────────────────────── */
.plan-category{text-align:center;font-size:1.1rem;color:var(--text);margin-bottom:20px}

/* ── Plans ────────────────────────────────────────── */
.plan-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.plan-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;position:relative;transition:transform .2s,box-shadow .2s}
.plan-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(0,0,0,0.3)}
.plan-card.featured{border-color:var(--accent);box-shadow:0 0 30px rgba(59,130,246,0.1)}
.plan-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;padding:4px 16px;border-radius:20px;font-size:.75rem;font-weight:700}
.plan-header h3{font-size:1.2rem;margin-bottom:8px}
.plan-price{font-size:2.5rem;font-weight:800;color:var(--accent);margin-bottom:4px}
.currency{font-size:1.2rem;vertical-align:top}
.period{font-size:1rem;font-weight:400;color:var(--text2)}
.plan-traffic{color:var(--text2);font-size:.85rem;margin-bottom:20px}
.plan-features{list-style:none;text-align:left;margin-bottom:24px}
.plan-features li{padding:6px 0;font-size:.9rem;color:var(--text2)}
.btn-plan{width:100%;padding:12px;background:transparent;border:1px solid var(--border);color:var(--text);border-radius:8px;font-weight:600;font-size:.9rem;transition:all .2s}
.btn-plan:hover{border-color:var(--accent);color:var(--accent)}
.btn-plan-primary{width:100%;padding:12px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;border:none;border-radius:8px;font-weight:600;font-size:.9rem;transition:transform .2s}
.btn-plan-primary:hover{transform:scale(1.03)}

/* ── Node Table ───────────────────────────────────── */
.nodes{background:var(--bg2);margin:0 24px;border-radius:var(--radius);border:1px solid var(--border)}
.node-table-wrap{max-width:1100px;margin:0 auto;overflow-x:auto}
.node-table{width:100%;border-collapse:collapse;font-size:.9rem}
.node-table th{text-align:left;padding:14px 16px;background:var(--bg3);color:var(--text2);font-size:.75rem;text-transform:uppercase;letter-spacing:.05em}
.node-table td{padding:12px 16px;border-bottom:1px solid var(--border)}
.node-table tr:last-child td{border:none}
.flag{margin-right:4px}
.type-tag{background:rgba(59,130,246,0.15);color:var(--accent);padding:2px 8px;border-radius:4px;font-size:.75rem;font-weight:600}
.latency{color:var(--success);font-family:var(--font-mono)}
.load-bar{width:80px;height:6px;background:var(--bg3);border-radius:3px;overflow:hidden}
.load-fill{height:100%;background:var(--success);border-radius:3px}
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px}
.status-dot.online{background:var(--success);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.4}}

/* ── Tutorial ─────────────────────────────────────── */
.guide{max-width:1100px;margin:0 auto}
.tabs{display:flex;gap:8px;margin-bottom:24px;justify-content:center}
.tab{background:var(--bg2);border:1px solid var(--border);color:var(--text2);padding:10px 20px;border-radius:8px;font-size:.9rem}
.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}
.tab-content{display:none}
.tab-content.active{display:block}
.guide-steps{max-width:600px;margin:0 auto}
.step{display:flex;gap:16px;margin-bottom:24px;align-items:flex-start}
.step-num{flex-shrink:0;width:36px;height:36px;background:var(--accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.step strong{display:block;margin-bottom:4px}
.step p{color:var(--text2);font-size:.85rem}

/* ── FAQ ──────────────────────────────────────────── */
.faq{max-width:700px;margin:0 auto}
details{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;margin-bottom:12px}
details[open]{border-color:var(--accent)}
summary{font-weight:600;cursor:pointer;outline:none}
details p{padding-top:12px;color:var(--text2);font-size:.9rem}

/* ── Footer ───────────────────────────────────────── */
.footer{text-align:center;padding:40px 24px;border-top:1px solid var(--border)}
.footer p{margin-bottom:4px}
.footer-muted{color:var(--text2);font-size:.8rem}

/* ── Modal ────────────────────────────────────────── */
.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200}
.modal-box{background:var(--bg2);border:1px solid var(--border);border-radius:16px;padding:32px;width:440px;max-width:90vw;max-height:85vh;overflow-y:auto}
.modal-box h2{font-size:1.2rem;margin-bottom:20px;text-align:center}
.order-info{border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:20px}
.order-row{display:flex;justify-content:space-between;padding:8px 0;font-size:.9rem}
.order-row span{color:var(--text2)}
.order-price{color:var(--accent);font-size:1.3rem}
.form-row{margin-bottom:14px}
.form-row label{display:block;font-size:.82rem;font-weight:600;margin-bottom:4px;color:var(--text2)}
.form-row input{width:100%;padding:10px 12px;background:var(--bg3);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.9rem}
.form-row input:focus{outline:none;border-color:var(--accent)}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}
.btn-ghost{background:none;border:1px solid var(--border);color:var(--text2);padding:10px 20px;border-radius:8px;font-size:.9rem}
.btn-ghost:hover{background:var(--bg3)}
.result-box{text-align:center}
.result-icon{font-size:3rem;margin-bottom:12px}

/* ── Toast ────────────────────────────────────────── */
.toast{position:fixed;bottom:30px;right:30px;background:var(--bg2);border:1px solid var(--border);color:var(--text);padding:12px 20px;border-radius:var(--radius);font-size:.85rem;z-index:300;animation:toast-in .25s ease}
.toast.error{background:var(--danger);border-color:var(--danger)}
@keyframes toast-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

.hidden{display:none !important}

/* ── Responsive ───────────────────────────────────── */
@media(max-width:768px){
  .nav-links{display:none}
  .nav-actions .btn-outline-sm{padding:4px 10px;font-size:.72rem}
  .hero h1{font-size:1.8rem}
  .hero-stats{gap:24px}
  .plan-grid{grid-template-columns:1fr}
  section{padding:60px 16px}
  .compare-table{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .compare-table table{min-width:600px}
  .node-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .node-table{min-width:600px}
  .hero-cta{flex-direction:column;align-items:center}
}