/* ═══════════════════════════════════════════════════════════════
   BottleneckLab — Main Styles
   Dark minimal theme with grain texture, neon accents, glassmorphism
   ═══════════════════════════════════════════════════════════════ */

/* ── Reset & Root ──────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:       #0a0a0f;
  --bg2:      #111118;
  --bg3:      #18182a;
  --surface:  rgba(255,255,255,.035);
  --surface2: rgba(255,255,255,.06);
  --border:   rgba(255,255,255,.08);
  --border2:  rgba(255,255,255,.14);
  --text:     #e8e8f0;
  --text2:    #9898b0;
  --text3:    #606078;
  --deep-blue:#0a1929;
  --navy:     #0f2a44;
  --slate:    #1e3a5f;
  --steel:    #2c4c6b;
  --ocean:    #2563eb;
  --wave:     #3b82f6;
  --mist:     #60a5fa;
  --accent:   #2563eb;
  --accent2:  #3b82f6;
  --cpu:      #00cec9;
  --gpu:      #e17055;
  --ram:      #00b894;
  --storage:  #fdcb6e;
  --danger:   #ff6b6b;
  --success:  #51cf66;
  --warn:     #fcc419;
  --font:     'Inter',system-ui,-apple-system,sans-serif;
  --mono:     'JetBrains Mono',monospace;
  --radius:   12px;
  --radius-sm:8px;
  --duration: .25s;
  --ease:     cubic-bezier(.4,0,.2,1);
  --nav-h:    64px;
}

html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

::selection{background:var(--accent);color:#fff}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--accent);border-radius:4px}

/* ── Grain Overlay ────────────────────────────────────────── */
.grain-overlay{
  position:fixed;inset:0;z-index:9999;
  pointer-events:none;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat:repeat;
  background-size:128px;
}

/* ── Nav ──────────────────────────────────────────────────── */
.main-nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:var(--nav-h);
  background:rgba(10,10,15,.82);
  backdrop-filter:blur(20px) saturate(1.6);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1320px;margin:0 auto;height:100%;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.logo-icon{font-size:1.4rem;color:var(--accent)}
.logo-text{font-weight:700;font-size:1.15rem;letter-spacing:-.03em}
.logo-accent{color:var(--accent2)}
.nav-links{display:flex;gap:32px}
.nav-link{
  color:var(--text2);text-decoration:none;font-size:.85rem;
  font-weight:500;letter-spacing:.02em;transition:color var(--duration);
}
.nav-link:hover{color:var(--text)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);transition:all var(--duration)}

/* ── Hero ─────────────────────────────────────────────────── */
.hero{
  position:relative;min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:calc(var(--nav-h) + 40px) 24px 60px;
  overflow:hidden;
}
.hero-bg-grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(37,99,235,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.06) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 30%,transparent 100%);
}
.hero-content{text-align:center;max-width:720px;position:relative;z-index:2}
.hero-tag{
  display:inline-block;font-size:.75rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--accent2);font-weight:600;
  padding:6px 18px;border:1px solid var(--border2);border-radius:20px;
  margin-bottom:28px;background:var(--surface);
}
.hero-title{font-size:clamp(2.4rem,6vw,4.2rem);font-weight:900;line-height:1.08;letter-spacing:-.04em;margin-bottom:22px}
.hero-line{display:block}
.hero-highlight{
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 50%,var(--cpu) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-desc{font-size:1.05rem;line-height:1.7;color:var(--text2);margin-bottom:36px;max-width:600px;margin-inline:auto}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:48px}
.hero-stats{
  display:flex;gap:48px;justify-content:center;flex-wrap:wrap;
  padding-top:36px;border-top:1px solid var(--border);
}
.stat{display:flex;flex-direction:column;align-items:center}
.stat-num{font-family:var(--mono);font-size:1.8rem;font-weight:700;color:var(--accent2)}
.stat-label{font-size:.75rem;color:var(--text2);text-transform:uppercase;letter-spacing:.1em}

/* ── Buttons ──────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 30px;border-radius:var(--radius);font-weight:600;
  font-size:.9rem;text-decoration:none;cursor:pointer;
  transition:all var(--duration) var(--ease);border:none;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#fff;box-shadow:0 4px 24px rgba(37,99,235,.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(37,99,235,.45)}
.btn-ghost{
  background:transparent;color:var(--text);
  border:1px solid var(--border2);
}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent2)}
.btn-analyze{
  position:relative;overflow:hidden;
  width:100%;max-width:360px;margin:32px auto 0;display:flex;justify-content:center;
  padding:16px 40px;font-size:1rem;
  background:linear-gradient(135deg,var(--accent),#1d4ed8);color:#fff;
  border-radius:var(--radius);cursor:pointer;border:none;font-weight:700;
  box-shadow:0 0 40px rgba(37,99,235,.25);
  transition:all var(--duration) var(--ease);
}
.btn-analyze:hover{transform:scale(1.02);box-shadow:0 0 60px rgba(37,99,235,.4)}
.btn-glow{
  position:absolute;inset:0;
  background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.15),transparent 70%);
  opacity:0;transition:opacity .3s;
}
.btn-analyze:hover .btn-glow{opacity:1}

/* ── Sections ─────────────────────────────────────────────── */
.section{padding:80px 24px}
.section-inner{max-width:1200px;margin:0 auto}
.section-header{text-align:center;margin-bottom:48px}
.section-tag{
  font-size:.7rem;letter-spacing:.15em;text-transform:uppercase;
  color:var(--accent);font-weight:700;display:block;margin-bottom:12px;
}
.section-title{font-size:clamp(1.6rem,4vw,2.6rem);font-weight:800;letter-spacing:-.03em;margin-bottom:12px}
.section-desc{color:var(--text2);font-size:.95rem;max-width:600px;margin-inline:auto}

/* ── Analyzer Grid ───────────────────────────────────────── */
.analyzer-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:20px;margin-bottom:28px;
}
.picker-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px 20px;
  transition:border-color var(--duration);
}
.picker-card:hover{border-color:var(--border2)}
.picker-card[data-type="cpu"] .picker-icon{color:var(--cpu)}
.picker-card[data-type="gpu"] .picker-icon{color:var(--gpu)}
.picker-card[data-type="ram"] .picker-icon{color:var(--ram)}
.picker-card[data-type="storage"] .picker-icon{color:var(--storage)}
.picker-icon{font-size:1.5rem;margin-bottom:8px}
.picker-label{display:block;font-size:.8rem;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.08em;margin-bottom:12px}

/* ── Searchable Select (Dropdown with Search) ────────────── */
.searchable-select{position:relative}
.search-input{
  width:100%;padding:12px 16px;font-size:.9rem;
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);
  font-family:var(--font);outline:none;
  transition:border-color var(--duration);
}
.search-input::placeholder{color:var(--text2);opacity:.6}
.search-input:focus{border-color:var(--accent)}
.dropdown-list{
  position:absolute;top:calc(100% + 4px);left:0;right:0;
  max-height:320px;overflow-y:auto;
  background:var(--bg2);border:1px solid var(--border2);
  border-radius:var(--radius-sm);z-index:50;
  display:none;
  box-shadow:0 12px 48px rgba(0,0,0,.5);
}
.dropdown-list.open{display:block}
.dropdown-item{
  padding:10px 16px;cursor:pointer;font-size:.85rem;
  border-bottom:1px solid var(--border);
  transition:background var(--duration);
  display:flex;justify-content:space-between;align-items:center;
}
.dropdown-item:last-child{border-bottom:none}
.dropdown-item:hover,.dropdown-item.highlighted{background:var(--surface2)}
.dropdown-item .item-name{font-weight:500;flex:1}
.dropdown-item .item-meta{font-size:.72rem;color:var(--text2);font-family:var(--mono);margin-left:12px}
.dropdown-item .item-score{
  font-family:var(--mono);font-size:.7rem;font-weight:700;
  padding:2px 8px;border-radius:4px;
  background:rgba(37,99,235,.15);color:var(--accent2);
}

/* ── Picker Info (spec card after selection) ─────────────── */
.picker-info{
  margin-top:12px;font-size:.78rem;color:var(--text2);
  line-height:1.5;min-height:0;transition:all var(--duration);
}
.picker-info:empty{display:none}
.picker-info .spec-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:4px 16px;
  margin-top:8px;
}
.picker-info .spec-key{font-weight:600;color:var(--text)}
.picker-info .spec-val{font-family:var(--mono);font-size:.72rem;text-align:right}

/* ── Tech Bar ─────────────────────────────────────────────── */
.tech-bar{
  display:flex;flex-wrap:wrap;gap:20px;align-items:flex-end;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px 24px;margin-bottom:8px;
}
.tech-group{display:flex;flex-direction:column;gap:6px}
.tech-label{font-size:.7rem;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.08em}
.tech-select{
  padding:10px 14px;font-size:.85rem;background:var(--bg2);
  border:1px solid var(--border);border-radius:var(--radius-sm);
  color:var(--text);font-family:var(--font);cursor:pointer;min-width:180px;
}
.tech-select:focus{border-color:var(--accent);outline:none}
.preset-pills{display:flex;gap:6px}
.pill{
  padding:8px 18px;border-radius:20px;font-size:.8rem;font-weight:600;
  background:var(--bg2);border:1px solid var(--border);color:var(--text2);
  cursor:pointer;transition:all var(--duration);
}
.pill.active,.pill:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.tech-toggles{flex-direction:row;gap:16px;align-items:center}
.toggle-item{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:.85rem;color:var(--text2)}
.toggle-item input[type="checkbox"]{
  appearance:none;width:18px;height:18px;border:2px solid var(--border2);
  border-radius:4px;cursor:pointer;position:relative;transition:all var(--duration);
}
.toggle-item input:checked{background:var(--accent);border-color:var(--accent)}
.toggle-item input:checked::after{
  content:'✓';position:absolute;inset:0;display:flex;
  align-items:center;justify-content:center;font-size:.65rem;color:#fff;
}

/* ── Results Panel ───────────────────────────────────────── */
.results-panel{
  margin-top:40px;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);
  padding:32px;animation:fadeSlideUp .5s var(--ease);
}
@keyframes fadeSlideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;flex-wrap:wrap;gap:12px}
.results-header h3{font-size:1.3rem;font-weight:700}
.results-badge{
  padding:6px 18px;border-radius:20px;font-size:.8rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.06em;
}
.results-badge.balanced{background:rgba(81,207,102,.15);color:var(--success)}
.results-badge.cpu-bottleneck{background:rgba(0,206,201,.15);color:var(--cpu)}
.results-badge.gpu-bottleneck{background:rgba(225,112,85,.15);color:var(--gpu)}
.results-badge.ram-bottleneck{background:rgba(0,184,148,.15);color:var(--ram)}

.results-visual{
  display:flex;align-items:center;gap:48px;flex-wrap:wrap;
  justify-content:center;margin-bottom:28px;
}
.bottleneck-ring{position:relative;width:200px;height:200px}
.bottleneck-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:var(--border);stroke-width:10}
.ring-fill{
  fill:none;stroke:var(--accent);stroke-width:10;
  stroke-linecap:round;stroke-dasharray:534;stroke-dashoffset:534;
  transition:stroke-dashoffset 1s var(--ease),stroke 0.4s;
}
.ring-center{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
}
.ring-pct{font-family:var(--mono);font-size:2.4rem;font-weight:800}
.ring-label{font-size:.75rem;color:var(--text2);text-transform:uppercase;letter-spacing:.1em}

.bar-chart{flex:1;min-width:260px;display:flex;flex-direction:column;gap:14px}
.bar-item{display:flex;align-items:center;gap:12px}
.bar-name{font-size:.75rem;font-weight:700;width:36px;text-align:right;color:var(--text2);text-transform:uppercase;letter-spacing:.08em}
.bar-track{flex:1;height:20px;background:var(--bg2);border-radius:10px;overflow:hidden;border:1px solid var(--border)}
.bar-fill{height:100%;border-radius:10px;transition:width 1s var(--ease);background:linear-gradient(90deg,var(--accent),var(--accent2))}
.bar-fill.gpu{background:linear-gradient(90deg,var(--gpu),#fab1a0)}
.bar-fill.ram{background:linear-gradient(90deg,var(--ram),#55efc4)}
.bar-fill.storage{background:linear-gradient(90deg,var(--storage),#ffeaa7)}
.bar-val{font-family:var(--mono);font-size:.75rem;width:32px;color:var(--text2)}

.results-details{
  background:var(--bg2);border-radius:var(--radius-sm);padding:20px;
  font-size:.85rem;line-height:1.8;color:var(--text2);margin-bottom:16px;
}
.results-details strong{color:var(--text)}
.results-suggestions{font-size:.85rem;color:var(--text2);line-height:1.7}
.results-suggestions .suggestion{
  padding:10px 16px;border-left:3px solid var(--accent);
  margin-bottom:8px;background:rgba(37,99,235,.05);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}

/* ── FPS Section ──────────────────────────────────────────── */
.fps-section{background:var(--bg2)}
.fps-top-row{
  display:flex;gap:20px;align-items:flex-end;margin-bottom:28px;flex-wrap:wrap;
}
.fps-game-picker{flex:1;min-width:280px}
.fps-cards-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:16px;margin-bottom:32px;
}
.fps-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;cursor:pointer;
  transition:all var(--duration) var(--ease);text-align:center;
}
.fps-card:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 8px 32px rgba(0,0,0,.4)}
.fps-card-res{font-size:.7rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.1em;margin-bottom:8px}
.fps-card-num{font-family:var(--mono);font-size:2.6rem;font-weight:800;line-height:1}
.fps-card-label{font-size:.7rem;color:var(--text2);margin-top:4px}
.fps-card .fps-low{font-family:var(--mono);font-size:.8rem;color:var(--text2);margin-top:6px}
.fps-card-num.fps-green{color:var(--success)}
.fps-card-num.fps-yellow{color:var(--warn)}
.fps-card-num.fps-red{color:var(--danger)}

.fps-detail-panel{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px;animation:fadeSlideUp .4s;
}
.fps-detail-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}
.fps-detail-header h4{font-size:1.1rem;font-weight:700}
.fps-detail-game-info{font-size:.78rem;color:var(--text2);font-family:var(--mono)}
.fps-detail-body{font-size:.85rem;color:var(--text2);line-height:1.8}
.fps-detail-body table{width:100%;border-collapse:collapse;margin-top:12px}
.fps-detail-body th,.fps-detail-body td{
  padding:10px 14px;text-align:left;border-bottom:1px solid var(--border);
}
.fps-detail-body th{font-size:.72rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.08em}
.fps-detail-body td{font-family:var(--mono);font-size:.82rem}

/* ── Explorer ─────────────────────────────────────────────── */
.explorer-tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.explorer-tab{
  padding:10px 24px;border-radius:20px;font-size:.82rem;font-weight:600;
  background:var(--surface);border:1px solid var(--border);color:var(--text2);
  cursor:pointer;transition:all var(--duration);
}
.explorer-tab.active,.explorer-tab:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.explorer-controls{
  display:flex;gap:12px;margin-bottom:20px;flex-wrap:wrap;
}
.explorer-search{
  flex:1;min-width:200px;padding:10px 16px;font-size:.85rem;
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);font-family:var(--font);
}
.explorer-search:focus{border-color:var(--accent);outline:none}
.explorer-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}
.explorer-table{width:100%;border-collapse:collapse;min-width:700px}
.explorer-table th{
  padding:12px 14px;font-size:.68rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.1em;color:var(--accent);
  background:var(--bg2);text-align:left;border-bottom:2px solid var(--border);
  cursor:pointer;user-select:none;
}
.explorer-table th:hover{color:var(--accent2)}
.explorer-table td{
  padding:10px 14px;font-size:.82rem;border-bottom:1px solid var(--border);
  color:var(--text2);
}
.explorer-table tr:hover td{background:var(--surface)}
.explorer-table td:first-child{color:var(--text);font-weight:500}
.explorer-pagination{
  display:flex;gap:6px;justify-content:center;margin-top:16px;
}
.page-btn{
  padding:8px 14px;border-radius:8px;font-size:.82rem;
  background:var(--surface);border:1px solid var(--border);
  color:var(--text2);cursor:pointer;transition:all var(--duration);
}
.page-btn.active,.page-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}

/* ── About / Footer ───────────────────────────────────────── */
.about-section{background:var(--bg)}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.about-grid h3{font-size:1.4rem;font-weight:700;margin-bottom:16px}
.about-grid h4{font-size:1rem;font-weight:700;margin-bottom:12px;margin-top:20px;color:var(--accent2)}
.about-grid p{color:var(--text2);font-size:.9rem;margin-bottom:12px;line-height:1.7}
.tech-list{list-style:none;display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--text2)}

/* ── How It Works ─────────────────────────────────────────── */
.howitworks-section{background:var(--bg2)}
.howitworks-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:32px}
.howitworks-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px 24px;transition:border-color var(--duration);
}
.howitworks-card:hover{border-color:var(--accent)}
.howitworks-step{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  background:var(--accent);color:#fff;font-weight:700;font-size:.95rem;
  margin-bottom:14px;
}
.howitworks-card h3{font-size:1.05rem;font-weight:700;margin-bottom:10px;color:var(--text)}
.howitworks-card p{font-size:.88rem;color:var(--text2);line-height:1.7}

/* ── Guide Section ────────────────────────────────────────── */
.guide-section{background:var(--bg)}
.guide-content{display:flex;flex-direction:column;gap:36px;margin-top:32px}
.guide-article{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:32px 28px;
}
.guide-article h3{font-size:1.2rem;font-weight:700;margin-bottom:14px;color:var(--text)}
.guide-article h4{font-size:1rem;font-weight:600;margin:18px 0 8px;color:var(--accent2)}
.guide-article p{font-size:.9rem;color:var(--text2);line-height:1.75;margin-bottom:10px}
.guide-list{padding-left:24px;font-size:.9rem;color:var(--text2);line-height:1.75;margin:10px 0}
.guide-list li{margin-bottom:8px}

/* ── Glossary Section ─────────────────────────────────────── */
.glossary-section{background:var(--bg2)}
.glossary-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:32px}
.glossary-item{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px 22px;transition:border-color var(--duration);
}
.glossary-item:hover{border-color:var(--accent)}
.glossary-item h4{font-size:.95rem;font-weight:700;margin-bottom:8px;color:var(--accent2)}
.glossary-item p{font-size:.85rem;color:var(--text2);line-height:1.7}

/* ── FAQ Section ──────────────────────────────────────────── */
.faq-section{background:var(--bg)}
.faq-list{display:flex;flex-direction:column;gap:12px;margin-top:32px;max-width:900px;margin-left:auto;margin-right:auto}
.faq-item{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;transition:border-color var(--duration);
}
.faq-item[open]{border-color:var(--accent)}
.faq-question{
  padding:18px 24px;cursor:pointer;font-size:.95rem;font-weight:600;
  color:var(--text);list-style:none;display:flex;align-items:center;
  justify-content:space-between;transition:color var(--duration);
}
.faq-question::-webkit-details-marker{display:none}
.faq-question::after{
  content:'＋';font-size:1.1rem;color:var(--accent);transition:transform var(--duration);
}
.faq-item[open] .faq-question::after{content:'−'}
.faq-question:hover{color:var(--accent2)}
.faq-answer{padding:0 24px 20px;font-size:.88rem;color:var(--text2);line-height:1.75}
.faq-answer p{margin-bottom:10px}
.faq-answer ul,.faq-answer ol{padding-left:22px;margin:8px 0}
.faq-answer li{margin-bottom:6px}

/* ── Privacy / Terms ──────────────────────────────────────── */
.privacy-section{background:var(--bg2)}
.legal-content{max-width:800px;margin:0 auto}
.legal-content h3{font-size:1.05rem;font-weight:700;color:var(--text);margin:24px 0 10px}
.legal-content h3:first-child{margin-top:0}
.legal-content p{font-size:.88rem;color:var(--text2);line-height:1.75;margin-bottom:10px}
.legal-content ul{list-style:disc;padding-left:22px;font-size:.88rem;color:var(--text2);line-height:1.75;margin-bottom:14px}
.legal-content li{margin-bottom:6px}
.legal-content a{color:var(--accent2);text-decoration:underline;text-underline-offset:3px}

.main-footer{
  position:relative;overflow:hidden;
  background:var(--bg2);border-top:1px solid var(--border);
  padding:40px 24px;text-align:center;
}
#footer3d{
  position:absolute;inset:0;width:100%;height:100%;
  pointer-events:none;opacity:.45;
}
.footer-inner{max-width:1200px;margin:0 auto;position:relative;z-index:2}
.footer-inner p{color:var(--text2);font-size:.78rem;margin-top:8px}
.footer-disclaimer{font-size:.68rem;color:var(--text3);margin-top:4px}

/* ── Ad Slots ─────────────────────────────────────────────── */
.ad-slot{max-width:1200px;margin:0 auto;padding:20px 24px;text-align:center}
.ad-slot ins{min-height:90px;display:block;background:transparent}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */
@media(max-width:860px){
  .nav-links{
    display:none;position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;gap:0;background:rgba(10,10,15,.96);
    backdrop-filter:blur(20px);border-bottom:1px solid var(--border);
  }
  .nav-links.open{display:flex}
  .nav-link{padding:16px 24px;border-bottom:1px solid var(--border)}
  .nav-toggle{display:flex}
  .hero-title{font-size:2rem}
  .hero-stats{gap:24px}
  .analyzer-grid{grid-template-columns:1fr}
  .tech-bar{flex-direction:column;align-items:stretch}
  .tech-select{min-width:100%}
  .results-visual{flex-direction:column}
  .about-grid{grid-template-columns:1fr}
  .howitworks-grid{grid-template-columns:1fr}
  .glossary-grid{grid-template-columns:1fr}
  .explorer-controls{flex-direction:column}
  .fps-cards-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
}

@media(max-width:480px){
  .hero{padding-top:calc(var(--nav-h) + 20px)}
  .hero-title{font-size:1.6rem}
  .section{padding:48px 16px}
  .picker-card{padding:16px 14px}
  .results-panel{padding:20px 16px}
  .hero-desc{font-size:.9rem}
  .fps-card-num{font-size:2rem}
}