* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #0a0a14;
  --bg-secondary: #0f0f1e;
  --bg-glass: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --neon-blue: #00d4ff;
  --neon-purple: #8b5cf6;
  --neon-pink: #ec4899;
  --neon-green: #10b981;
  --text-primary: #f0f0ff;
  --text-secondary: #8888aa;
  --text-muted: #555577;
  --gradient-main: linear-gradient(135deg, #00d4ff, #8b5cf6);
  --gradient-glow: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(139, 92, 246, 0.15));
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: linear-gradient(rgba(0,212,255,0.03) 1px,transparent 1px), linear-gradient(90deg,rgba(0,212,255,0.03) 1px,transparent 1px);
  background-size: 50px 50px;
  pointer-events: none; z-index: 0;
}
body::after {
  content: '';
  position: fixed; top: -200px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(139,92,246,0.12) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

.container { position: relative; z-index: 1; max-width: 1600px; margin: 0 auto; padding: 24px 20px 60px; }

/* ─── Main grid ── */
.main-grid { display: grid; grid-template-columns: 1fr 420px; gap: 20px; align-items: start; }
.col-panels { display: none; flex-direction: column; gap: 20px; }
.main-grid:has(.col-panels .compare-panel:not(.hidden)) { grid-template-columns: 480px 1fr 420px; }
.main-grid:has(.col-panels .compare-panel:not(.hidden)) .col-panels { display: flex; }
.col-left, .col-right { display: flex; flex-direction: column; gap: 20px; }
.col-panels .compare-panel, .col-left .speed-card, .col-left .tabs-wrap,
.col-right .conn-panel, .col-right .ai-card, .col-right .history-card { margin-bottom: 0; }

@media (max-width: 1100px) {
  .main-grid, .main-grid:has(.col-panels .compare-panel:not(.hidden)) {
    grid-template-columns: 1fr 360px;
    grid-template-areas: "center right" "panels panels";
  }
  .main-grid:has(.col-panels .compare-panel:not(.hidden)) .col-panels { display: flex; flex-direction: row; grid-area: panels; }
  .col-left { grid-area: center; } .col-right { grid-area: right; }
}
@media (max-width: 700px) {
  .main-grid, .main-grid:has(.col-panels .compare-panel:not(.hidden)) { grid-template-columns: 1fr; grid-template-areas: "center" "right" "panels"; }
  .main-grid:has(.col-panels .compare-panel:not(.hidden)) .col-panels { flex-direction: column; }
}

/* ─── Light Mode ── */
body.light { --bg-primary:#eef0f8; --bg-secondary:#e2e5f0; --bg-glass:rgba(0,0,0,0.04); --glass-border:rgba(0,0,50,0.12); --text-primary:#12122a; --text-secondary:#44447a; --text-muted:#8888aa; --gradient-glow:linear-gradient(135deg,rgba(0,212,255,0.08),rgba(139,92,246,0.08)); }
body.light::before { background-image: linear-gradient(rgba(0,100,200,0.05) 1px,transparent 1px),linear-gradient(90deg,rgba(0,100,200,0.05) 1px,transparent 1px); }
body.light::after { background: radial-gradient(ellipse 800px 300px at 50% -60px,rgba(0,180,255,0.10),transparent); }
body.light .speed-card, body.light .conn-panel, body.light .tabs-wrap, body.light .ai-card, body.light .history-card { background: rgba(255,255,255,0.65); border-color: rgba(0,0,80,0.10); }
body.light .tab-btn { color: var(--text-secondary); }
body.light .tab-btn.active { color: #fff; }
body.light .result-card { background: rgba(255,255,255,0.8); }
body.light .history-item { background: rgba(255,255,255,0.7); }
body.light .cs-dropdown { background: #fff; border-color: rgba(0,0,80,0.12); }
body.light .cs-option:hover { background: rgba(0,100,200,0.06); }
body.light .ping-bar-outer { background: rgba(0,0,0,0.08); }
body.light .jitter-graph { background: rgba(0,100,200,0.04); }
body.light .jitter-empty-text { fill: #aab; }
body.light .mismatch-banner { background: rgba(200,140,0,0.08); }
body.light .compare-panel { background: rgba(255,255,255,0.5); }
body.light .dns-bar-track { background: rgba(0,0,0,0.07); }
body.light .dns-recommend { background: rgba(16,185,129,0.06); }
body.light .ms-note { color: var(--text-secondary); }
body.light .proto-table th { background: rgba(0,0,0,0.04); }
body.light .proto-table tr:hover td { background: rgba(0,0,0,0.02); }
body.light .proto-summary-bar { background: rgba(0,0,0,0.04); }
body.light .proto-loopback-card { background: rgba(0,212,255,0.05); border-color: rgba(0,212,255,0.2); }
body.light .meter-track { stroke: rgba(0,0,50,0.12); }

/* ─── Header ── */
.header { text-align: center; margin-bottom: 32px; position: relative; }
.theme-toggle { position: absolute; top: 0; right: 0; background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 10px; width: 38px; height: 38px; font-size: 18px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background 0.2s, transform 0.15s; color: var(--text-primary); }
.theme-toggle:hover { background: rgba(0,212,255,0.10); transform: scale(1.08); }
.logo { display: inline-flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.logo-img { width: 44px; height: 44px; border-radius: 12px; box-shadow: 0 0 20px rgba(0,212,255,0.3); display: block; }
.logo-text { font-size: 28px; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.5px; }
.tagline { color: var(--text-secondary); font-size: 14px; letter-spacing: 0.5px; }

/* Server selector */
.server-row { display: flex; justify-content: center; align-items: center; gap: 12px; margin-bottom: 28px; flex-wrap: wrap; }
.server-label { font-size: 13px; color: var(--text-secondary); }
.server-custom-select { width: 260px; font-size: 13px; }

/* Speed card */
.speed-card { background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 24px; padding: 40px 32px; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); text-align: center; box-shadow: 0 0 40px rgba(0,0,0,0.5),inset 0 1px 0 rgba(255,255,255,0.05); }

/* Meter */
.meter-wrap { position: relative; width: 260px; height: 260px; margin: 0 auto 28px; }
.meter-svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.meter-track { fill: none; stroke: rgba(255,255,255,0.06); stroke-width: 8; stroke-linecap: round; }
.meter-fill { fill: none; stroke: url(#meterGradient); stroke-width: 8; stroke-linecap: round; stroke-dasharray: 691; stroke-dashoffset: 691; transition: stroke-dashoffset 0.3s ease; filter: drop-shadow(0 0 6px rgba(0,212,255,0.7)); }
.meter-center { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); text-align: center; }
.speed-value { font-size: 56px; font-weight: 900; line-height: 1; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-variant-numeric: tabular-nums; letter-spacing: -2px; }
.speed-unit { font-size: 14px; color: var(--text-secondary); letter-spacing: 1px; margin-top: 4px; }
.speed-phase { font-size: 12px; color: var(--neon-blue); text-transform: uppercase; letter-spacing: 2px; margin-top: 6px; min-height: 16px; transition: opacity 0.3s; }

/* Stats row */
.stats-row { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 32px; }
.stat-chip { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.07); border-radius: 12px; padding: 10px 18px; min-width: 100px; transition: border-color 0.3s, background 0.3s; }
.stat-chip.active { border-color: var(--neon-blue); background: rgba(0,212,255,0.06); }
.stat-chip.done { border-color: var(--neon-green); background: rgba(16,185,129,0.06); }
.stat-chip.warn { border-color: #fbbf24; background: rgba(251,191,36,0.06); }
.stat-chip.bad { border-color: #ef4444; background: rgba(239,68,68,0.06); }
.stat-chip-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.stat-chip-value { font-size: 20px; font-weight: 700; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.stat-chip-unit { font-size: 10px; color: var(--text-secondary); margin-left: 2px; }

/* Buttons */
.btn-row { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.btn-start { position: relative; background: var(--gradient-main); color: #fff; border: none; border-radius: 50px; padding: 16px 52px; font-size: 16px; font-weight: 700; cursor: pointer; letter-spacing: 0.5px; overflow: hidden; transition: transform 0.2s, box-shadow 0.2s; box-shadow: 0 0 30px rgba(0,212,255,0.3), 0 4px 15px rgba(0,0,0,0.4); }
.btn-start:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 0 40px rgba(0,212,255,0.5),0 8px 25px rgba(0,0,0,0.4); }
.btn-start:active:not(:disabled) { transform: translateY(0); }
.btn-start:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-start::before { content: ''; position: absolute; top: -50%; left: -60%; width: 30%; height: 200%; background: rgba(255,255,255,0.15); transform: skewX(-20deg); transition: left 0.5s; }
.btn-start:hover::before { left: 120%; }
.btn-reset { background: transparent; border: 1px solid var(--glass-border); color: var(--text-secondary); border-radius: 50px; padding: 16px 28px; font-size: 14px; cursor: pointer; transition: border-color 0.2s, color 0.2s; }
.btn-reset:hover { border-color: var(--text-secondary); color: var(--text-primary); }

/* Tabs */
.tabs-wrap { background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 20px; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); overflow: hidden; box-shadow: 0 0 40px rgba(0,0,0,0.4); }
.tab-bar { display: flex; border-bottom: 1px solid var(--glass-border); overflow-x: auto; scrollbar-width: none; }
.tab-bar::-webkit-scrollbar { display: none; }
.tab-btn { flex: 1; min-width: 70px; background: none; border: none; color: var(--text-muted); padding: 14px 6px; font-size: 12px; font-weight: 600; cursor: pointer; transition: color 0.2s, background 0.2s; position: relative; letter-spacing: 0.3px; text-transform: uppercase; }
.tab-btn.active { color: var(--neon-blue); background: rgba(0,212,255,0.04); }
.tab-btn.active::after { content: ''; position: absolute; bottom: 0; left: 20%; width: 60%; height: 2px; background: var(--gradient-main); border-radius: 2px 2px 0 0; }
.tab-content { display: none; padding: 24px; min-height: 200px; }
.tab-content.active { display: block; }

/* Ping tab */
.ping-display { display: flex; align-items: center; justify-content: center; gap: 40px; padding: 20px 0; flex-wrap: wrap; }
.ping-big { text-align: center; }
.ping-big .num { font-size: 72px; font-weight: 900; background: linear-gradient(135deg,#10b981,#00d4ff); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.ping-big .num.pl-num { background: linear-gradient(135deg,#fbbf24,#ef4444); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.ping-big .lbl { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 2px; }
.ping-samples { flex: 1; min-width: 180px; }
.ping-sample-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.ping-sample-row .idx { font-size: 11px; color: var(--text-muted); width: 24px; }
.ping-bar-outer { flex: 1; height: 6px; background: rgba(255,255,255,0.06); border-radius: 3px; overflow: hidden; }
.ping-bar-inner { height: 100%; background: linear-gradient(90deg,#10b981,#00d4ff); border-radius: 3px; width: 0%; transition: width 0.4s ease; }
.ping-sample-row .ms { font-size: 12px; color: var(--text-secondary); width: 48px; text-align: right; }

/* Download / Upload */
.dl-display { text-align: center; padding: 16px 0; }
.dl-big-speed { font-size: 64px; font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; font-variant-numeric: tabular-nums; }
.dl-unit { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }
.progress-bar-outer { width: 100%; max-width: 400px; height: 8px; background: rgba(255,255,255,0.06); border-radius: 4px; margin: 0 auto 12px; overflow: hidden; }
.progress-bar-inner { height: 100%; background: var(--gradient-main); border-radius: 4px; width: 0%; transition: width 0.3s ease; box-shadow: 0 0 8px rgba(0,212,255,0.5); }
.progress-label { font-size: 12px; color: var(--text-muted); }

/* Results */
.results-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(140px,1fr)); gap: 14px; margin-bottom: 20px; }
.result-card { background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); border-radius: 16px; padding: 20px 16px; text-align: center; transition: border-color 0.3s; }
.result-card:hover { border-color: rgba(0,212,255,0.3); }
.result-icon { font-size: 24px; margin-bottom: 8px; }
.result-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }
.result-value { font-size: 32px; font-weight: 800; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.result-unit { font-size: 12px; color: var(--text-secondary); margin-left: 3px; }
.score-section { text-align: center; padding: 16px; background: var(--gradient-glow); border: 1px solid rgba(0,212,255,0.15); border-radius: 16px; }
.score-label { font-size: 12px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.score-value { font-size: 56px; font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.score-desc { font-size: 13px; color: var(--text-secondary); margin-top: 6px; }

/* AI Panel */
.ai-card { background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 20px; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); overflow: hidden; box-shadow: 0 0 40px rgba(0,0,0,0.4); }
.ai-header { display: flex; align-items: center; gap: 10px; padding: 16px 24px; border-bottom: 1px solid var(--glass-border); background: rgba(139,92,246,0.06); }
.ai-header-icon { width: 32px; height: 32px; background: linear-gradient(135deg,#8b5cf6,#ec4899); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 16px; box-shadow: 0 0 12px rgba(139,92,246,0.4); }
.ai-header-title { font-size: 14px; font-weight: 700; color: var(--text-primary); }
.ai-header-sub { font-size: 11px; color: var(--text-muted); }
.ai-body { padding: 20px 24px; min-height: 120px; max-height: 420px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: rgba(139,92,246,0.3) transparent; }
.ai-body::-webkit-scrollbar { width: 4px; }
.ai-body::-webkit-scrollbar-track { background: transparent; }
.ai-body::-webkit-scrollbar-thumb { background: rgba(139,92,246,0.3); border-radius: 4px; }
.ai-idle { color: var(--text-muted); font-size: 13px; text-align: center; padding: 20px 0; line-height: 1.6; }
.ai-thinking { display: flex; align-items: center; gap: 10px; color: var(--neon-purple); font-size: 13px; }
.thinking-dots { display: flex; gap: 4px; }
.thinking-dots span { width: 6px; height: 6px; background: var(--neon-purple); border-radius: 50%; animation: blink 1.2s infinite; }
.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%,80%,100%{opacity:.2;transform:scale(0.8);} 40%{opacity:1;transform:scale(1);} }
.ai-response { color: var(--text-primary); font-size: 14px; line-height: 1.7; }
.ai-response p { margin-bottom: 10px; }
.ai-response p:last-child { margin-bottom: 0; }
.ai-response ul, .ai-response ol { margin: 6px 0 12px 22px; }
.ai-response li { margin-bottom: 5px; line-height: 1.6; }
.ai-response ul li::marker { color: var(--neon-blue); }
.ai-response ol li::marker { color: var(--neon-purple); font-weight: 700; }

/* History */
.history-card { background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 20px; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); overflow: hidden; box-shadow: 0 0 40px rgba(0,0,0,0.4); }
.history-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--glass-border); }
.history-title { font-size: 13px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }
.btn-clear-history { background: none; border: none; color: var(--text-muted); font-size: 12px; cursor: pointer; padding: 4px 8px; border-radius: 6px; transition: color 0.2s; }
.btn-clear-history:hover { color: var(--neon-pink); }
.history-list { max-height: 220px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: rgba(0,212,255,0.2) transparent; }
.history-item { display: flex; align-items: center; gap: 12px; padding: 10px 20px; border-bottom: 1px solid rgba(255,255,255,0.03); font-size: 12px; transition: background 0.2s; }
.history-item:hover { background: rgba(255,255,255,0.02); }
.history-item:last-child { border-bottom: none; }
.history-time { color: var(--text-muted); flex-shrink: 0; width: 120px; }
.history-stats { display: flex; gap: 14px; flex-wrap: wrap; flex: 1; }
.history-stat { color: var(--text-secondary); }
.history-stat span { color: var(--text-primary); font-weight: 600; }
.history-score { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-weight: 700; flex-shrink: 0; }
.history-empty { text-align: center; padding: 28px; color: var(--text-muted); font-size: 13px; }

/* Status bar */
.status-bar { margin-top: 12px; font-size: 13px; color: var(--text-muted); min-height: 18px; transition: color 0.3s; }
.status-bar.running { color: var(--neon-blue); }
.status-bar.done { color: var(--neon-green); }

/* Pulse */
@keyframes pulseRing { 0%{box-shadow:0 0 0 0 rgba(0,212,255,0.4);} 70%{box-shadow:0 0 0 20px rgba(0,212,255,0);} 100%{box-shadow:0 0 0 0 rgba(0,212,255,0);} }
.meter-wrap.pulsing .meter-svg { animation: pulseRing 1.5s infinite; border-radius: 50%; }

/* Toast */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(80px); background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.4); color: #fca5a5; padding: 12px 24px; border-radius: 12px; font-size: 14px; backdrop-filter: blur(12px); z-index: 1000; transition: transform 0.3s ease; max-width: 360px; text-align: center; }
.toast.show { transform: translateX(-50%) translateY(0); }

/* Connection Panel */
.conn-panel { background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 20px; backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); padding: 20px 24px; box-shadow: 0 0 30px rgba(0,0,0,0.4); position: relative; z-index: 50; }
.conn-type-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.conn-label { font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.conn-toggle { display: flex; gap: 6px; background: rgba(255,255,255,0.04); border: 1px solid var(--glass-border); border-radius: 12px; padding: 4px; }
.conn-toggle-btn { background: none; border: none; color: var(--text-muted); padding: 8px 18px; border-radius: 9px; font-size: 13px; font-weight: 600; cursor: pointer; display: flex; align-items: center; gap: 6px; transition: background 0.2s, color 0.2s, box-shadow 0.2s; white-space: nowrap; }
.conn-toggle-btn.active { background: var(--gradient-main); color: #fff; box-shadow: 0 0 14px rgba(0,212,255,0.25); }
.toggle-icon { font-size: 15px; }
.conn-section { animation: fadeIn 0.2s ease; margin-top: 14px; }
.conn-section.hidden { display: none; }

/* Mismatch banner — fixed: no stray text, proper spacing */
.mismatch-banner {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  background: rgba(255,180,0,0.08);
  border: 1px solid rgba(255,180,0,0.35);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 12px;
  color: #ffd166;
  line-height: 1.5;
  margin-top: 12px;
  animation: fadeIn 0.2s ease;
}
.mismatch-banner.hidden { display: none !important; }
.mismatch-banner strong { color: #ffe599; }

/* Jitter graph */
.jitter-graph-wrap { margin: 18px 0 10px; }
.jitter-graph-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 8px; }
.jitter-graph { width: 100%; height: 80px; background: rgba(0,212,255,0.03); border: 1px solid var(--glass-border); border-radius: 10px; display: block; }
.jitter-empty-text { font-size: 13px; fill: #445; font-family: inherit; }

/* Result actions */
.result-actions { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.btn-action { flex: 1; min-width: 110px; background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 10px; color: var(--text-secondary); padding: 10px 12px; font-size: 13px; font-weight: 600; cursor: pointer; transition: background .2s, color .2s, border-color .2s, transform .1s; font-family: inherit; }
.btn-action:hover { background: rgba(0,212,255,0.08); color: var(--neon-blue); border-color: rgba(0,212,255,0.35); transform: translateY(-1px); }
.btn-action:active { transform: translateY(0); }

/* Streaming */
.stream-panel { animation: fadeIn .3s ease; }
.stream-panel.hidden { display: none; }
.stream-panel-title { font-size: 13px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .07em; margin-bottom: 12px; }
.stream-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(140px,1fr)); gap: 10px; }
.stream-card { background: var(--bg-glass); border: 1px solid var(--glass-border); border-radius: 12px; padding: 12px 14px; display: flex; flex-direction: column; gap: 6px; transition: transform .15s; }
.stream-card:hover { transform: translateY(-2px); }
.stream-card-icon { font-size: 22px; line-height: 1; }
.stream-card-name { font-size: 12px; font-weight: 700; color: var(--text-primary); line-height: 1.2; }
.stream-card-detail { font-size: 11px; color: var(--text-muted); }
.stream-badge { display: inline-flex; align-items: center; gap: 4px; font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 20px; width: fit-content; margin-top: 2px; }
.stream-badge.great { background: rgba(16,185,129,0.15); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.stream-badge.ok { background: rgba(251,191,36,0.12); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.stream-badge.poor { background: rgba(239,68,68,0.12); color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }

/* Compare panels */
.compare-panel { background: rgba(139,92,246,0.04); border: 1px solid rgba(139,92,246,0.2); border-radius: 16px; padding: 18px 20px; animation: fadeIn .3s ease; }
.compare-panel.hidden { display: none; }
.compare-panel-title { font-size: 13px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: .07em; margin-bottom: 14px; }

/* Speed Tier */
.speed-tier-section { margin-bottom: 16px; animation: fadeIn .4s ease; }
.speed-tier-section.hidden { display: none; }
.tier-badge { display: flex; flex-direction: column; gap: 10px; padding: 14px 16px; border-radius: 14px; border: 1px solid; }
.tier-badge-left { display: flex; align-items: center; gap: 12px; }
.tier-emoji { font-size: 28px; line-height: 1; }
.tier-label { font-size: 17px; font-weight: 800; letter-spacing: -.01em; }
.tier-speed { font-size: 12px; font-weight: 600; opacity: .75; margin-top: 2px; }
.tier-desc { font-size: 12px; line-height: 1.5; opacity: .85; }
.tier-fiber    { background: rgba(250,204,21,0.10); border-color: rgba(250,204,21,0.35); color: #fde047; }
.tier-gigabit  { background: rgba(0,212,255,0.10);  border-color: rgba(0,212,255,0.35);  color: #00d4ff; }
.tier-fast     { background: rgba(16,185,129,0.10); border-color: rgba(16,185,129,0.35); color: #10b981; }
.tier-broadband{ background: rgba(59,130,246,0.10); border-color: rgba(59,130,246,0.35); color: #60a5fa; }
.tier-standard { background: rgba(251,191,36,0.10); border-color: rgba(251,191,36,0.35); color: #fbbf24; }
.tier-basic    { background: rgba(239,68,68,0.10);  border-color: rgba(239,68,68,0.30);  color: #f87171; }

/* VPN */
.vpn-checking { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-muted); padding: 6px 0; }
.vpn-rows { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.vpn-row { display: grid; grid-template-columns: 24px 1fr; grid-template-rows: auto auto; column-gap: 10px; row-gap: 2px; }
.vpn-icon { font-size: 18px; grid-row: 1 / 3; align-self: center; }
.vpn-row-info { display: flex; align-items: center; gap: 8px; }
.vpn-row-label { font-size: 13px; font-weight: 700; color: var(--text-primary); }
.vpn-row-status { font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 20px; text-transform: uppercase; letter-spacing: .05em; }
.vpn-row-status.clean { background: rgba(16,185,129,0.15); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.vpn-row-status.warn  { background: rgba(251,191,36,0.15); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.vpn-row-desc { font-size: 11px; color: var(--text-muted); line-height: 1.4; }
.vpn-meta { display: flex; flex-direction: column; gap: 4px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,.06); }
.vpn-meta-item { font-size: 11px; color: var(--text-muted); }
.vpn-error { font-size: 12px; color: var(--text-muted); padding: 6px 0; }

/* DNS */
.dns-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.dns-row:last-of-type { margin-bottom: 0; }
.dns-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.dns-name { font-size: 13px; font-weight: 700; color: var(--text-primary); width: 110px; flex-shrink: 0; }
.dns-addr { font-size: 10px; color: var(--text-muted); width: 80px; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.dns-bar-track { flex: 1; height: 8px; background: rgba(255,255,255,0.05); border-radius: 5px; overflow: hidden; }
.dns-bar-fill { height: 100%; border-radius: 5px; transition: width .8s cubic-bezier(0.4,0,0.2,1); }
.dns-ms { font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text-primary); width: 58px; text-align: right; flex-shrink: 0; }
.dns-badge { font-size: 10px; font-weight: 700; padding: 2px 7px; border-radius: 20px; flex-shrink: 0; width: 52px; text-align: center; }
.dns-badge.fast   { background: rgba(16,185,129,0.15); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.dns-badge.good   { background: rgba(251,191,36,0.12); color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.dns-badge.slow   { background: rgba(239,68,68,0.12);  color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }
.dns-badge.cached { background: rgba(139,92,246,0.12); color: #a78bfa; border: 1px solid rgba(139,92,246,0.3); }
.col-panels .dns-name { width: 110px; } .col-panels .dns-addr { width: 110px; } .col-panels .dns-ms { width: 58px; } .col-panels .dns-badge { width: 52px; }
.dns-recommend { margin-top: 14px; padding: 10px 14px; border-radius: 10px; font-size: 13px; font-weight: 600; background: rgba(16,185,129,0.08); border: 1px solid rgba(16,185,129,0.25); color: #10b981; line-height: 1.5; }

/* Connection fields */
.conn-field { margin-bottom: 14px; }
.conn-field:last-child { margin-bottom: 0; }
.conn-field-label { display: block; font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.netgen-row { display: flex; gap: 8px; flex-wrap: wrap; }
.netgen-btn { background: rgba(255,255,255,0.04); border: 1px solid var(--glass-border); color: var(--text-secondary); border-radius: 8px; padding: 8px 18px; font-size: 13px; font-weight: 600; cursor: pointer; transition: background .2s, color .2s, border-color .2s; }
.netgen-btn.active { background: rgba(139,92,246,0.15); border-color: var(--neon-purple); color: var(--neon-purple); }

/* Custom Select */
.custom-select { position: relative; user-select: none; }
.cs-trigger { display: flex; align-items: center; justify-content: space-between; gap: 8px; background: rgba(255,255,255,0.04); border: 1px solid var(--glass-border); border-radius: 10px; padding: 10px 14px; cursor: pointer; transition: border-color .2s, background .2s; min-height: 42px; }
.cs-trigger:hover, .custom-select.open .cs-trigger { border-color: var(--neon-blue); background: rgba(0,212,255,0.04); }
.cs-trigger-text { font-size: 13px; color: var(--text-primary); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cs-trigger-text.placeholder { color: var(--text-muted); }
.cs-chevron { font-size: 10px; color: var(--text-muted); transition: transform .2s; flex-shrink: 0; }
.custom-select.open .cs-chevron { transform: rotate(180deg); }
.cs-dropdown { position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: #13132a; border: 1px solid rgba(0,212,255,0.2); border-radius: 12px; box-shadow: 0 16px 48px rgba(0,0,0,0.7),0 0 0 1px rgba(255,255,255,0.04); z-index: 9999; overflow: hidden; opacity: 0; transform: translateY(-8px) scaleY(.95); transform-origin: top; pointer-events: none; transition: opacity .18s ease, transform .18s ease; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.custom-select.open .cs-dropdown { opacity: 1; transform: translateY(0) scaleY(1); pointer-events: auto; }
.cs-search-wrap { padding: 10px 10px 6px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.cs-search { width: 100%; background: rgba(255,255,255,0.05); border: 1px solid rgba(0,212,255,0.15); border-radius: 8px; padding: 8px 12px; color: var(--text-primary); font-size: 13px; outline: none; transition: border-color .2s; }
.cs-search:focus { border-color: var(--neon-blue); }
.cs-search::placeholder { color: var(--text-muted); }
.cs-list { max-height: 220px; overflow-y: auto; padding: 4px 0; scrollbar-width: thin; scrollbar-color: rgba(0,212,255,0.2) transparent; }
.cs-list::-webkit-scrollbar { width: 4px; }
.cs-list::-webkit-scrollbar-track { background: transparent; }
.cs-list::-webkit-scrollbar-thumb { background: rgba(0,212,255,0.2); border-radius: 4px; }
.cs-group-header { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; color: var(--text-muted); padding: 8px 14px 4px; }
.cs-option { padding: 9px 14px; font-size: 13px; color: var(--text-secondary); cursor: pointer; transition: background .15s, color .15s; display: flex; align-items: center; gap: 8px; }
.cs-option:hover { background: rgba(0,212,255,0.06); color: var(--text-primary); }
.cs-option.selected { color: var(--neon-blue); background: rgba(0,212,255,0.08); }
.cs-no-results { padding: 14px; font-size: 13px; color: var(--text-muted); text-align: center; }

/* ═══════════════════════════════════════════════════════
   PROTOCOL TESTING PANEL — TCP / UDP
═══════════════════════════════════════════════════════ */

.protocols-panel { min-height: 180px; }

/* Idle / running states */
.proto-idle { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 40px 20px; text-align: center; }
.proto-idle-icon { font-size: 36px; opacity: .4; }
.proto-idle-text { font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.proto-running { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--neon-blue); padding: 20px 0; }

/* Summary bar */
.proto-summary-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 10px;
  background: rgba(0,212,255,0.04);
  border: 1px solid rgba(0,212,255,0.12);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 20px;
}
.proto-sum-item { text-align: center; }
.proto-sum-val { font-size: 17px; font-weight: 800; color: var(--neon-blue); font-variant-numeric: tabular-nums; line-height: 1.2; }
.proto-sum-lbl { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .8px; margin-top: 4px; }

/* Section labels */
.proto-section-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; color: var(--text-muted); margin-bottom: 10px; }

/* Tables */
.proto-table-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid var(--glass-border); }
.proto-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.proto-table th { padding: 9px 12px; text-align: left; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: .8px; color: var(--text-muted); background: rgba(255,255,255,0.03); border-bottom: 1px solid var(--glass-border); white-space: nowrap; }
.proto-table td { padding: 10px 12px; border-bottom: 1px solid rgba(255,255,255,0.04); vertical-align: middle; }
.proto-table tbody tr:last-child td { border-bottom: none; }
.proto-table tbody tr:hover td { background: rgba(255,255,255,0.02); }
.proto-name { font-weight: 600; color: var(--text-primary); white-space: nowrap; }
.proto-port { font-size: 11px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.proto-transport { font-size: 11px; color: var(--neon-purple); font-weight: 600; white-space: nowrap; }

/* Protocol quality badges */
.proto-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 20px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.proto-badge.fast   { background: rgba(16,185,129,0.15); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.proto-badge.good   { background: rgba(251,191,36,0.12);  color: #fbbf24; border: 1px solid rgba(251,191,36,0.3); }
.proto-badge.slow   { background: rgba(239,68,68,0.12);   color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }
.proto-badge.cached { background: rgba(139,92,246,0.12);  color: #a78bfa; border: 1px solid rgba(139,92,246,0.3); font-size: 10px; }
.proto-badge.mid    { background: rgba(99,179,237,0.12);  color: #63b3ed; border: 1px solid rgba(99,179,237,0.3); }
.proto-badge.na     { background: rgba(255,255,255,0.04); color: var(--text-muted); border: 1px solid rgba(255,255,255,0.08); }

/* UDP Loopback card */
.proto-loopback-card {
  margin-top: 20px;
  background: rgba(0,212,255,0.04);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 14px;
  padding: 16px 18px;
  animation: fadeIn .3s ease;
}
.proto-loopback-fail { border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.05); color: #f87171; font-size: 13px; }
.proto-loopback-title { font-size: 12px; font-weight: 700; color: var(--neon-blue); text-transform: uppercase; letter-spacing: .8px; margin-bottom: 14px; }
.proto-loopback-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(80px,1fr)); gap: 10px; margin-bottom: 12px; }
.proto-lstat { text-align: center; }
.proto-lstat-val { font-size: 18px; font-weight: 800; color: var(--text-primary); font-variant-numeric: tabular-nums; line-height: 1.2; }
.proto-lstat-lbl { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .6px; margin-top: 3px; }
.proto-loopback-note { font-size: 11px; color: var(--text-muted); border-top: 1px solid rgba(0,212,255,0.12); padding-top: 10px; line-height: 1.5; }

/* Legend */
.proto-legend { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; align-items: center; }

/* Share URL box */
.share-url-box {
  display: flex; align-items: center; gap: 8px;
  background: rgba(0,212,255,0.06); border: 1px solid rgba(0,212,255,0.25);
  border-radius: 10px; padding: 10px 12px; margin-top: 10px;
  animation: fadeIn 0.2s ease;
}
.share-url-box.hidden { display: none !important; }
.share-url-label { font-size: 12px; color: var(--neon-blue); font-weight: 600; white-space: nowrap; flex-shrink: 0; }
.share-url-input {
  flex: 1; background: rgba(255,255,255,0.05); border: 1px solid rgba(0,212,255,0.2);
  border-radius: 7px; padding: 6px 10px; font-size: 12px; color: var(--text-primary);
  outline: none; font-family: monospace; min-width: 0;
}
.share-url-copy {
  background: rgba(0,212,255,0.12); border: 1px solid rgba(0,212,255,0.3);
  color: var(--text-primary); border-radius: 7px; padding: 6px 10px;
  font-size: 14px; cursor: pointer; flex-shrink: 0; transition: background 0.2s;
}
.share-url-copy:hover { background: rgba(0,212,255,0.22); }

/* Shared result banner */
.shared-banner {
  background: rgba(0,212,255,0.07); border: 1px solid rgba(0,212,255,0.25);
  border-radius: 10px; padding: 10px 14px; font-size: 13px; color: var(--neon-blue);
  line-height: 1.5; margin-bottom: 16px; animation: fadeIn 0.3s ease;
}
.shared-banner strong { color: #fff; }

/* ─── Print ── */
@media print {
  body { background: #fff !important; color: #000 !important; }
  body::before, body::after { display: none !important; }
  .conn-panel, .tabs-wrap .tab-bar, .btn-row, .history-card, .ai-card, .server-row, .result-actions, .theme-toggle, .mismatch-banner, .toast, #tab-ping, #tab-download, #tab-upload, #tab-protocols { display: none !important; }
  .container { max-width: 100%; padding: 20px; }
  .speed-card { border: 1px solid #ccc; border-radius: 12px; padding: 20px; background: #fff !important; }
  .tabs-wrap { border: 1px solid #ccc; border-radius: 12px; padding: 20px; background: #fff !important; }
  .tab-content { display: block !important; }
  .results-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 10px; }
  .result-card { border: 1px solid #ddd; border-radius: 8px; padding: 12px; background: #f9f9f9 !important; }
  .result-value { color: #1a1a2e !important; -webkit-text-fill-color: #1a1a2e !important; }
  .score-section { border: 1px solid #ddd; border-radius: 8px; padding: 12px; margin-top: 12px; background: #f9f9f9 !important; }
  .score-value { color: #1a1a2e !important; -webkit-text-fill-color: #1a1a2e !important; }
  .logo-text { -webkit-text-fill-color: #1a1a2e !important; color: #1a1a2e !important; }
}

@keyframes fadeIn { from{opacity:0;transform:translateY(-6px);} to{opacity:1;transform:translateY(0);} }

/* ─── Responsive — Tablet ── */
@media (max-width: 600px) {
  .container { padding: 16px 12px 48px; }
  .speed-value { font-size: 44px; }
  .meter-wrap { width: 200px; height: 200px; }
  .speed-card { padding: 24px 14px; }
  .stats-row { gap: 6px; justify-content: center; }
  .stat-chip { min-width: 72px; padding: 7px 10px; }
  .stat-chip-value { font-size: 17px; }
  .btn-start { padding: 14px 40px; font-size: 15px; }
  .btn-reset { padding: 14px 20px; font-size: 13px; }
  .ping-display { flex-direction: column; align-items: center; gap: 16px; padding: 10px 0; }
  .ping-big .num { font-size: 56px; }
  .ping-samples { width: 100%; }
  .jitter-graph-wrap { width: 100%; }
  .dl-big-speed { font-size: 52px; }
  .conn-panel { padding: 14px 14px; }
  .conn-type-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .conn-toggle { width: 100%; }
  .conn-toggle-btn { flex: 1; justify-content: center; padding: 8px 10px; font-size: 12px; }
  .cs-dropdown { position: fixed; left: 12px; right: 12px; top: auto; }
  .tab-btn { font-size: 11px; padding: 12px 4px; }
  .tab-content { padding: 16px; }
  .proto-summary-bar { grid-template-columns: 1fr 1fr; }
  .proto-loopback-grid { grid-template-columns: 1fr 1fr 1fr; }
  .proto-table { font-size: 11px; }
  .proto-table th, .proto-table td { padding: 8px 8px; }
  .result-actions { flex-direction: column; }
  .btn-action { min-width: unset; width: 100%; }
  .history-time { width: 90px; font-size: 10px; }
  .history-stats { gap: 8px; }
  .server-custom-select { width: 100%; max-width: 340px; }
  .logo-text { font-size: 22px; }
}

/* ─── Responsive — Small phone ── */
@media (max-width: 380px) {
  .meter-wrap { width: 180px; height: 180px; }
  .speed-value { font-size: 38px; }
  .stat-chip { min-width: 60px; padding: 6px 8px; }
  .stat-chip-value { font-size: 15px; }
  .tab-btn { font-size: 10px; padding: 10px 2px; }
  .ping-big .num { font-size: 48px; }
  .dl-big-speed { font-size: 44px; }
}