/* ============================================
   Nano Works — Base 3B CSS
   统一视觉语言：精密工业风
   替代 base.css + v1.css + v2-*.css
   ============================================ */

/* --- Tokens --- */
:root{
  --cyan:#007aff;--cyan-g:rgba(0,122,255,0.5);
  --blue:#2563eb;--blue-r:37,99,235;
  --t:#1e293b;--t2:#475569;--t3:#64748b;--t4:#94a3b8;--t5:#cbd5e1;
  --g:#22c55e;--gr:34,197,94;
  --danger:#dc2626;
  --fd:'Outfit','Noto Sans SC',sans-serif;
  --fm:'JetBrains Mono',monospace;
  --fr:'Orbitron',monospace;
  --fb:'Noto Sans SC','Outfit',sans-serif;
  /* Legacy compat aliases (for existing tool pages using nw- vars) */
  --nw-bg:#f4f7fb;--nw-text:#1e293b;--nw-dim:#64748b;
  --nw-surface:rgba(241,245,249,0.85);--nw-border:rgba(100,116,139,0.45);
  --nw-brand:#2563eb;--nw-accent:#2563eb;--nw-danger:#dc2626;--nw-green:#22c55e;
  --nw-sans:'Noto Sans SC','Outfit',sans-serif;
  --nw-mono:'JetBrains Mono',monospace;
  --nw-code-bg:rgba(30,41,59,0.04);--nw-code-text:#1e293b;
  --nw-brand-glow:rgba(37,99,235,0.3);--nw-accent-glow:rgba(37,99,235,0.3);
  --nw-accent-bg:rgba(37,99,235,0.04);
  --nw-tab-active:#2563eb;
  --nw-header-bar:linear-gradient(90deg,#2563eb,rgba(37,99,235,0.2));
  --nw-color-line:linear-gradient(90deg,#2563eb 0%,#2563eb 40%,#22c55e 40%,#22c55e 70%,#94a3b8 70%);
  --nw-footer-bg:rgba(208,220,236,0.85);--nw-footer-text:#64748b;
  /* Tool page shorthand variable bridge */
  --border:rgba(100,116,139,0.45);--surface:rgba(241,245,249,0.85);--bg:rgba(255,255,255,0.9);
  --text:#1e293b;--text-dim:#64748b;--dim:#64748b;
  --mono:'JetBrains Mono',monospace;--sans:'Noto Sans SC','Outfit',sans-serif;
  --accent:#2563eb;--brand:#2563eb;
  --green:#22c55e;--orange:#f59e0b;--warn:#f59e0b;--pink:#ec4899;--purple:#8b5cf6;
  /* ECC shorthand bridge */
  --acc:var(--blue);--bdr:rgba(100,116,139,0.45);--srf:rgba(241,245,249,0.6);
  --grn:var(--g);--red:var(--danger);--org:#f59e0b
}

/* --- Reset --- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:clamp(14px, 0.4167vw + 8px, 24px)}

/* --- Body --- */
body{font-family:var(--fb);background:linear-gradient(180deg,#f4f7fb 0%,#e6edf6 35%,#d7e1ef 65%,#c3cfdd 100%);color:var(--t);min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding:20px;overflow-x:hidden;background-image:radial-gradient(1600px 800px at 50% -10%,rgba(255,255,255,0.85),transparent 55%),radial-gradient(1400px 900px at 50% 120%,rgba(6,18,40,0.12),transparent 70%),linear-gradient(180deg,#f4f7fb 0%,#e6edf6 35%,#d7e1ef 65%,#c3cfdd 100%)}
body::before{content:'';position:fixed;inset:0;pointer-events:none;opacity:0.035;mix-blend-mode:multiply;z-index:0;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E")}

/* --- Grid BG --- */
.grid-bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,black 30%,transparent 80%);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,black 30%,transparent 80%)}
.grid-bg .g-main{position:absolute;inset:0;background-image:linear-gradient(to right,#6b7f99 1px,transparent 1px),linear-gradient(to bottom,#6b7f99 1px,transparent 1px);background-size:48px 48px;opacity:0.025}
.grid-bg .g-micro{position:absolute;inset:0;background-image:linear-gradient(to right,#6b7f99 1px,transparent 1px),linear-gradient(to bottom,#6b7f99 1px,transparent 1px);background-size:12px 12px;opacity:0.012}

/* --- Main Panel --- */
.mech{width:min(1680px,96vw);background:linear-gradient(180deg,rgba(255,255,255,0.85) 0%,rgba(232,238,246,0.92) 100%);border:1px solid rgba(6,18,40,0.16);border-radius:18px;box-shadow:0 24px 60px rgba(6,18,40,0.18),inset 0 1px 0 rgba(255,255,255,0.9);position:relative;z-index:10;backdrop-filter:blur(8px)}
.mech>.noise-layer{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.03;mix-blend-mode:soft-light;border-radius:18px;overflow:hidden;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");background-size:200px 200px}
.hc{position:absolute;width:8px;height:8px;z-index:20;pointer-events:none;opacity:.5}
.hc-tl{top:14px;left:14px;border-top:1.5px solid var(--cyan);border-left:1.5px solid var(--cyan)}
.hc-tr{top:14px;right:14px;border-top:1.5px solid var(--cyan);border-right:1.5px solid var(--cyan)}
.hc-bl{bottom:14px;left:14px;border-bottom:1.5px solid var(--cyan);border-left:1.5px solid var(--cyan)}
.hc-br{bottom:14px;right:14px;border-bottom:1.5px solid var(--cyan);border-right:1.5px solid var(--cyan)}

/* ===== TOP BAR ===== */
.topbar{display:flex;align-items:center;padding:0 36px;height:60px;position:relative;z-index:1;border-bottom:1.5px solid rgba(100,116,139,0.2);background:rgba(225,232,242,0.85);border-radius:18px 18px 0 0}
.topbar::after{content:'';position:absolute;bottom:-1px;left:36px;right:36px;height:1px;background:linear-gradient(90deg,transparent,rgba(148,163,184,0.2) 10%,rgba(148,163,184,0.2) 90%,transparent)}
.tb-logo{font-family:var(--fr);font-size:1.125rem;font-weight:700;letter-spacing:3px;display:flex;align-items:center;gap:10px;color:var(--t);min-width:200px;text-decoration:none}
.nano-ring{width:24px;height:24px;border-radius:50%;background:conic-gradient(from 0deg,var(--cyan),var(--blue),rgba(37,99,235,0.1),var(--cyan));display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 0 4px rgba(37,99,235,0.2);animation:ring-rotate 8s linear infinite}
.tb-logo:hover .nano-ring{box-shadow:0 0 8px rgba(37,99,235,0.35);animation-duration:3s}
.nano-ring::after{content:'';width:14px;height:14px;border-radius:50%;background:rgba(225,232,242,0.9)}
.tb-tabs{display:flex;gap:28px;margin-left:16px}
.tb-tab{font-family:'Noto Sans SC',var(--fm),sans-serif;font-size:0.8125rem;letter-spacing:.04em;color:var(--t3);font-weight:400;cursor:pointer;padding:20px 0;position:relative;transition:.3s;text-decoration:none}
.tb-tab:hover{color:var(--blue)}
.tb-tab.active{color:var(--blue);font-weight:700}
.tb-tab.active::after{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:24px;height:3px;background:var(--cyan);box-shadow:0 2px 8px var(--cyan-g);border-radius:0 0 3px 3px}
.tb-tab-blog{color:var(--blue);font-weight:600}
.tb-right{margin-left:auto;display:flex;gap:10px;align-items:center}
.tb-ecc{display:inline-flex;align-items:center;gap:5px;font-family:var(--fm);font-size:0.75rem;letter-spacing:1.5px;font-weight:600;padding:5px 14px;border:1.5px solid rgba(148,163,184,0.3);color:var(--t2);border-radius:6px;background:linear-gradient(180deg,rgba(226,232,240,0.5) 0%,rgba(214,222,234,0.4) 100%);box-shadow:inset 0 1px 0 rgba(255,255,255,0.5);cursor:pointer;transition:.2s;text-decoration:none}
.tb-ecc:hover{border-color:rgba(37,99,235,0.35);color:var(--blue);background:linear-gradient(180deg,rgba(232,238,246,0.7) 0%,rgba(220,228,240,0.6) 100%)}
.tb-btn{width:30px;height:30px;border:1px solid rgba(148,163,184,0.2);background:rgba(255,255,255,.3);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--t3);font-size:0.8125rem;border-radius:6px;transition:.2s;text-decoration:none}
.tb-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.tb-btn-label{width:auto;height:auto;padding:5px 12px;gap:4px;font-family:'Noto Sans SC',var(--fm),sans-serif;font-size:0.6875rem;letter-spacing:.04em;font-weight:400;white-space:nowrap}

/* ===== TOOL HEADER ===== */
.tool-header{padding:48px 56px 40px;position:relative;z-index:1;border-bottom:1.5px solid rgba(100,116,139,0.12);overflow:hidden}
.tool-header::before{content:'';position:absolute;top:-20%;right:-5%;width:400px;height:400px;background:radial-gradient(circle,rgba(37,99,235,0.05) 0%,transparent 60%);pointer-events:none}
.tool-breadcrumb{display:flex;align-items:center;gap:8px;font-family:var(--fm);font-size:0.75rem;letter-spacing:1.5px;color:var(--t4);margin-bottom:20px}
.tool-breadcrumb a{color:var(--t4);text-decoration:none;transition:.2s}
.tool-breadcrumb a:hover{color:var(--blue)}
.tool-breadcrumb .bc-sep{opacity:.3}
.tool-breadcrumb .bc-current{color:var(--t2);font-weight:600}
.tool-header-grid{display:grid;grid-template-columns:1fr auto;gap:32px;align-items:start}
.tool-title-area{display:flex;flex-direction:column;gap:10px}
.tool-unit{font-family:var(--fm);font-size:0.75rem;letter-spacing:3px;color:var(--t4);font-weight:600}
.tool-title{font-family:var(--fd);font-size:2.25rem;font-weight:700;color:var(--t);line-height:1.2}
.tool-subtitle{font-family:var(--fm);font-size:0.6875rem;letter-spacing:1.5px;color:var(--t3)}
.tool-desc{font-family:var(--fb);font-size:0.9375rem;color:var(--t3);line-height:1.75;margin-top:6px;max-width:640px}
.tool-header-meta{display:flex;flex-direction:column;align-items:flex-end;gap:10px;padding-top:8px}
.tool-status{display:flex;align-items:center;gap:6px;font-family:var(--fm);font-size:0.6875rem;letter-spacing:2px;font-weight:700;padding:4px 12px;border-radius:4px;background:rgba(var(--gr),.08);color:var(--g);border:1px solid rgba(var(--gr),.12)}
.tool-status::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--g);box-shadow:0 0 6px rgba(var(--gr),.5)}
.tool-ver-badge{font-family:var(--fm);font-size:0.6875rem;letter-spacing:1.5px;color:var(--t4);padding:3px 10px;border:1px solid rgba(148,163,184,0.2);border-radius:4px;background:rgba(255,255,255,.3)}
.tool-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.tool-tag{font-family:var(--fm);font-size:0.6875rem;padding:3px 10px;border-radius:4px;border:1px solid rgba(var(--blue-r),.1);background:rgba(var(--blue-r),.03);color:var(--t3);letter-spacing:1px}
.tool-stats{display:flex;flex-direction:column;gap:6px}
.tool-stat{font-family:var(--fm);font-size:0.75rem;color:var(--t4);letter-spacing:1px;display:flex;align-items:center;gap:8px}
.tool-stat b{color:var(--t2);font-family:var(--fd);font-weight:700;font-size:0.875rem}

/* ===== TOOL CONTENT AREA ===== */
.tool-content{padding:0 56px;position:relative;z-index:1}
/* Override tool page .app container inside 3B shell */
.tool-content .app,.app{width:100%;max-width:100%;min-width:0;padding:28px 0 60px;margin:0;position:relative;z-index:1}

/* ===== LEGACY NW- COMPONENTS (compat with existing tool pages) ===== */
/* These map old nw- classes to 3B visual language */
.nw-marquee{display:none}
.nw-nav{display:none}
.nw-color-line{display:none}
.nw-app{width:100%;max-width:100%;padding:32px 0 40px;position:relative;z-index:1;min-width:auto;margin:0}
.nw-header{margin-bottom:24px;padding:0}
.nw-header-id{font-family:var(--fm);font-size:0.6875rem;letter-spacing:3px;color:var(--t4);margin-bottom:8px;display:block}
.nw-header-title{font-family:var(--fd);font-weight:700;font-size:1.5rem;letter-spacing:.01em;color:var(--t)}
.nw-header-sub{font-size:0.875rem;color:var(--t3);margin-top:6px;line-height:1.65}
.nw-header-bar{height:2px;background:linear-gradient(90deg,var(--blue),rgba(37,99,235,0.15));max-width:100px;margin-top:12px;opacity:0.5}

/* Tabs */
.nw-tabs{display:flex;gap:0;margin-bottom:24px;overflow-x:auto;border-bottom:1.5px solid rgba(100,116,139,0.12)}
.nw-tab{background:none;border:none;border-bottom:2px solid transparent;color:var(--t3);font-family:'Noto Sans SC',var(--fm),sans-serif;font-size:0.8125rem;font-weight:400;letter-spacing:.04em;padding:12px 20px;cursor:pointer;transition:all .2s;white-space:nowrap;position:relative}
.nw-tab:hover{color:var(--blue)}
.nw-tab.active{color:var(--blue);font-weight:600;border-bottom-color:var(--blue)}
.nw-tab .tab-dot{width:5px;height:5px;border-radius:50%;display:inline-block;margin-right:6px;vertical-align:middle}

/* Buttons */
.nw-btn{background:none;border:1.5px solid rgba(100,116,139,0.25);color:var(--t2);font-family:var(--fm);font-size:0.75rem;padding:8px 18px;cursor:pointer;letter-spacing:1.5px;transition:all .2s;border-radius:6px;font-weight:500}
.nw-btn:hover{border-color:rgba(37,99,235,0.35);color:var(--blue)}
.nw-btn.primary{background:linear-gradient(180deg,#2563eb 0%,#1e40af 100%);color:#fff;border-color:rgba(6,18,40,0.35);font-weight:600;box-shadow:0 4px 10px rgba(6,18,40,0.15),inset 0 1px 0 rgba(255,255,255,0.3)}
.nw-btn.primary:hover{box-shadow:0 6px 16px rgba(6,18,40,0.2),inset 0 1px 0 rgba(255,255,255,0.4);transform:translateY(-1px)}
.nw-btn.accent{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:600}
.nw-btn.accent:hover{box-shadow:0 4px 12px rgba(37,99,235,0.25)}
.nw-btn.danger{border-color:rgba(220,38,38,0.3);color:var(--danger)}
.nw-btn.danger:hover{background:var(--danger);color:#fff}
.nw-btn:disabled{opacity:0.4;cursor:not-allowed}

/* Action Bar */
.nw-action-bar{display:flex;gap:8px;margin:16px 0;flex-wrap:wrap;align-items:center}
.nw-action-info{font-family:var(--fm);font-size:0.6875rem;letter-spacing:1.5px;color:var(--t4);margin-left:auto}

/* Section Label */
.nw-section-label{font-family:var(--fm);font-size:0.6875rem;letter-spacing:3px;color:var(--t4);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.nw-section-label::after{content:'';flex:1;height:1px;background:rgba(100,116,139,0.15)}

/* Input/Output Areas */
.nw-input{width:100%;min-height:200px;padding:16px 20px;background:rgba(255,255,255,.5);border:1.5px solid rgba(100,116,139,0.18);color:var(--t);font-family:var(--fm);font-size:0.8125rem;line-height:1.7;resize:vertical;outline:none;transition:border-color .2s;border-radius:8px}
.nw-input:focus{border-color:rgba(37,99,235,0.35);box-shadow:0 0 0 3px rgba(37,99,235,0.06)}
.nw-input::placeholder{color:var(--t5)}
.nw-output{width:100%;min-height:200px;padding:16px 20px;background:rgba(30,41,59,0.03);border:1.5px solid rgba(100,116,139,0.15);color:var(--t);font-family:var(--fm);font-size:0.8125rem;line-height:1.7;resize:vertical;outline:none;border-radius:8px}

/* Form Controls */
.nw-select{height:34px;border:1.5px solid rgba(100,116,139,0.18);background:rgba(255,255,255,.5);padding:0 10px;font-family:var(--fm);font-size:0.75rem;color:var(--t);outline:none;cursor:pointer;border-radius:6px;transition:.2s}
.nw-select:focus{border-color:rgba(37,99,235,0.35)}
.nw-text-input{height:34px;border:1.5px solid rgba(100,116,139,0.18);background:rgba(255,255,255,.5);padding:0 12px;font-family:var(--fm);font-size:0.75rem;color:var(--t);outline:none;transition:border-color .2s;border-radius:6px}
.nw-text-input:focus{border-color:rgba(37,99,235,0.35);box-shadow:0 0 0 3px rgba(37,99,235,0.06)}
.nw-range{-webkit-appearance:none;height:4px;background:rgba(100,116,139,0.15);border-radius:2px;outline:none}
.nw-range::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;background:var(--blue);border-radius:50%;cursor:pointer}

/* Settings Card */
.nw-settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin-bottom:24px}
.nw-s-card{background:rgba(255,255,255,0.5);border:1px solid rgba(100,116,139,0.14);padding:16px;transition:border-color .2s;border-radius:10px}
.nw-s-card:hover{border-color:rgba(100,116,139,0.25)}
.nw-s-head{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.nw-s-toggle{width:36px;height:20px;background:rgba(148,163,184,0.2);border-radius:10px;cursor:pointer;position:relative;transition:background .2s;flex-shrink:0;border:1px solid rgba(148,163,184,0.2)}
.nw-s-toggle.on{background:var(--blue);border-color:var(--blue)}
.nw-s-toggle::after{content:'';position:absolute;top:2px;left:2px;width:14px;height:14px;background:#fff;border-radius:50%;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.15)}
.nw-s-toggle.on::after{transform:translateX(16px)}
.nw-s-label{font-family:var(--fm);font-size:0.6875rem;letter-spacing:2px;font-weight:600;color:var(--t2)}
.nw-s-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.nw-s-row:last-child{margin-bottom:0}
.nw-s-key{font-size:0.8125rem;color:var(--t3);width:80px;flex-shrink:0}
.nw-s-val{font-family:var(--fm);font-size:0.75rem;color:var(--blue);width:40px;text-align:right;flex-shrink:0}

/* Upload Zone */
.nw-upload{border:1.5px dashed rgba(100,116,139,0.25);background:rgba(255,255,255,.35);padding:40px;text-align:center;cursor:pointer;transition:all .2s;position:relative;margin-bottom:24px;border-radius:12px}
.nw-upload:hover,.nw-upload.drag{border-color:rgba(37,99,235,0.4);background:rgba(37,99,235,0.03)}
.nw-upload input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer}
.nw-upload-icon{font-size:2rem;margin-bottom:10px;opacity:0.3}
.nw-upload-text{font-size:0.875rem;color:var(--t3);margin-bottom:4px}
.nw-upload-hint{font-family:var(--fm);font-size:0.6875rem;letter-spacing:1.5px;color:var(--t4);opacity:0.6}

/* Queue Grid */
.nw-queue{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.nw-q-item{background:rgba(255,255,255,0.5);border:1px solid rgba(100,116,139,0.14);overflow:hidden;position:relative;transition:border-color .2s;border-radius:8px}
.nw-q-item:hover{border-color:rgba(100,116,139,0.25)}
.nw-q-item.processing{border-color:var(--blue)}
.nw-q-item.done{border-color:var(--g)}
.nw-q-item.error{border-color:var(--danger)}

/* Stats Bar */
.nw-stats{display:flex;gap:20px;padding:14px 0;border-top:1px solid rgba(100,116,139,0.12);margin-top:20px;flex-wrap:wrap}
.nw-stat{display:flex;align-items:baseline;gap:6px}
.nw-stat-val{font-family:var(--fm);font-size:1rem;font-weight:700;color:var(--t)}
.nw-stat-label{font-family:var(--fm);font-size:0.6875rem;letter-spacing:1.5px;color:var(--t4)}

/* Checkboxes & Options */
.nw-options{display:flex;flex-wrap:wrap;gap:12px;margin:12px 0;align-items:center}
.nw-opt-check{display:flex;align-items:center;gap:6px;cursor:pointer;font-size:0.8125rem;color:var(--t3)}
.nw-opt-check input{accent-color:var(--blue);width:14px;height:14px;cursor:pointer}
.nw-opt-check:hover{color:var(--t)}

/* Empty State */
.nw-empty{text-align:center;padding:60px 20px;color:var(--t4)}
.nw-empty-icon{font-size:2.5rem;margin-bottom:12px;opacity:0.3}
.nw-empty-text{font-family:var(--fm);font-size:0.6875rem;letter-spacing:2px}

/* ===== TOAST ===== */
.nw-toast{position:fixed;top:16px;left:50%;transform:translateX(-50%) translateY(-80px);padding:8px 24px;background:rgba(255,255,255,0.9);border:1.5px solid var(--blue);font-family:var(--fm);font-size:0.75rem;letter-spacing:1.5px;color:var(--t);transition:transform .4s cubic-bezier(.34,1.56,.64,1);z-index:1000;pointer-events:none;border-radius:8px;backdrop-filter:blur(8px);box-shadow:0 8px 20px rgba(6,18,40,0.15)}
.nw-toast.show{transform:translateX(-50%) translateY(0)}
.nw-toast.error{border-color:var(--danger);color:var(--danger)}

/* ===== FOOTER ===== */
.footer{display:flex;align-items:center;padding:16px 36px;gap:16px;font-family:var(--fm);font-size:0.75rem;letter-spacing:2.5px;color:var(--t3);background:rgba(208,220,236,0.85);border-top:1.5px solid rgba(148,163,184,0.15);border-radius:0 0 18px 18px;position:relative;z-index:1}
.footer::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(0,216,255,0.12) 30%,rgba(148,163,184,0.1) 50%,rgba(0,216,255,0.12) 70%,transparent)}
.ft-left{display:flex;align-items:center;gap:10px}
.ft-ver{font-size:0.6875rem;color:var(--t5);letter-spacing:1.5px}
.ft-center{display:flex;align-items:center;gap:14px;margin:0 auto}
.ft-dot{width:4px;height:4px;background:var(--cyan);border-radius:50%;opacity:.5}
.footer a{color:var(--cyan);text-decoration:none}
.footer-sep{opacity:.2}
.ft-right{display:flex;align-items:center;gap:6px;color:var(--t4)}
.ft-status-dot{width:5px;height:5px;border-radius:50%;background:var(--g);box-shadow:0 0 5px rgba(var(--gr),.4)}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes ring-rotate{to{transform:rotate(360deg)}}
.an{animation:fadeUp .7s cubic-bezier(.16,1,.3,1) forwards;opacity:0}
.d1{animation-delay:.1s}.d2{animation-delay:.15s}.d3{animation-delay:.2s}.d4{animation-delay:.25s}
@media(prefers-reduced-motion:reduce){.an{animation:none;opacity:1}}

/* ===== RESPONSIVE ===== */
@media(max-width:1100px){
  .tool-header{padding:36px 36px 32px}
  .tool-content{padding:0 36px}
}
@media(max-width:768px){
  body{padding:0}
  .mech{width:100%;border-radius:0;border-left:none;border-right:none;box-shadow:none}
  .topbar{padding:0 14px;height:44px}
  .tb-logo{font-size:0.875rem;letter-spacing:2px;min-width:auto}
  .nano-ring{width:14px;height:14px;border-width:2px}
  .nano-ring::after{width:4px;height:4px}
  .tb-tabs{display:none}
  .tb-right{gap:4px}
  .tb-ecc{font-size:0.6875rem;padding:4px 8px;letter-spacing:1px}
  .tb-ecc-internal{display:none}
  .tool-header{padding:24px 16px 20px}
  .tool-header-grid{grid-template-columns:1fr}
  .tool-header-meta{flex-direction:row;align-items:center}
  .tool-title{font-size:1.5rem}
  .tool-subtitle{font-size:0.6875rem}
  .tool-desc{font-size:0.8125rem}
  .tool-content{padding:0 16px}
  .tool-content .app,.app{padding:20px 0 40px}
  .nw-app{padding:24px 0 40px}
  .nw-settings-grid{grid-template-columns:1fr}
  .nw-action-bar{gap:6px}
  .nw-queue{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
  .nw-stats{gap:12px}
  .footer{flex-direction:column;gap:8px;padding:14px 16px}
  .ft-left,.ft-right{display:none}
  .ft-center{flex-wrap:wrap;justify-content:center;font-size:0.75rem}
  .hc{display:none}
}
/* ── Scrollbar visibility ── */
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(30,41,59,.25);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:rgba(30,41,59,.45)}
html{scrollbar-width:thin;scrollbar-color:rgba(30,41,59,.25) transparent}

/* 4K / HiDPI large screen scaling — layout only, font scaling handled by root clamp() */
@media(min-width:1800px){
  .topbar{height:68px;padding:0 44px}
  .nano-ring{width:28px;height:28px}
  .nano-ring::after{width:17px;height:17px}
  .tb-tab{padding:24px 0}
  .tb-btn{width:34px;height:34px}
  .tb-btn-label{width:auto;height:auto;padding:6px 14px}
  .tool-header{padding:36px 48px 28px}
  .tool-tag{padding:4px 12px}
  .footer{padding:20px 44px}
}