/* ═══════════════════════════════════════════════════════════════
 * VEIL Trainer — Styles v3
 * Uses /css/tokens.css for design tokens → automatic theme support
 * Hero + Challenge Mode + Results + Hub + 2-column puzzle layout
 * ═══════════════════════════════════════════════════════════════ */

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

html{font-family:var(--sans);color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
body{min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-bright)}

::selection{background:var(--selection-bg)}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)}

/* ═══ HEADER — identical to platform ═══════════════════════════ */
.app-header{
  display:flex;align-items:center;gap:20px;padding:0 20px;
  height:52px;background:var(--glass);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:100;flex-shrink:0;
}
.app-header::after{
  content:'';position:absolute;bottom:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(45,123,181,.3),rgba(45,232,200,.2),transparent);
}
.app-logo{
  display:flex;align-items:center;gap:9px;
  font-size:17px;font-weight:700;color:var(--text);
  letter-spacing:-.3px;text-decoration:none;
}
.app-logo-icon{height:26px;width:auto;filter:drop-shadow(0 0 8px rgba(45,232,200,.3))}
.app-logo-wrap{display:flex;flex-direction:column;line-height:1.15}
.app-logo-text{color:var(--accent2)}
.app-logo-veil{color:var(--accent)}
.app-logo-tag{
  font-size:8px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent2);opacity:.6;
  white-space:nowrap;
}

.app-nav{display:flex;gap:2px;flex:1;margin-left:20px}
.nav-link{
  color:var(--text-secondary);text-decoration:none;font-size:13px;
  padding:6px 12px;border-radius:6px;
  transition:all .2s var(--ease);position:relative;
  cursor:pointer;border:none;background:none;font-family:var(--sans);font-weight:500;
}
.nav-link:hover{color:var(--text);background:rgba(45,123,181,.08)}
.nav-link.active{color:var(--accent2);background:rgba(45,232,200,.08);font-weight:600}
.nav-link.active::after{
  content:'';position:absolute;bottom:-1px;left:20%;right:20%;
  height:2px;background:var(--brand-gradient);border-radius:1px;
}

.app-user{display:flex;align-items:center;gap:12px}

.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:30px;height:30px;border:1px solid var(--border);
  border-radius:var(--radius-sm);background:transparent;
  color:var(--text-secondary);cursor:pointer;
  transition:all .2s var(--ease);flex-shrink:0;
}
.theme-toggle:hover{color:var(--accent2);border-color:var(--border-hover);background:var(--accent2-dim)}
.theme-toggle svg{display:block}

.lang-dd{position:relative;flex-shrink:0}
.lang-dd-btn{
  display:inline-flex;align-items:center;gap:4px;
  font-size:12px;font-weight:600;letter-spacing:.5px;
  padding:5px 10px;border-radius:var(--radius-full);
  border:1px solid var(--border);background:var(--glass);
  color:var(--text-secondary);cursor:pointer;
  transition:all .15s;font-family:var(--sans);
}
.lang-dd-btn:hover{color:var(--text);border-color:var(--border-hover)}
.lang-dd-btn svg{opacity:.5;transition:transform .2s}
.lang-dd.open .lang-dd-btn svg{transform:rotate(180deg)}
.lang-dd-menu{
  display:none;position:absolute;top:calc(100% + 6px);right:0;
  min-width:140px;background:var(--surface-2);
  border:1px solid var(--border);border-radius:10px;
  padding:4px;box-shadow:0 8px 32px rgba(0,0,0,.45);z-index:200;
}
.lang-dd.open .lang-dd-menu{display:block;animation:langFadeIn .15s ease}
@keyframes langFadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.lang-dd-item{
  display:block;width:100%;padding:8px 12px;
  font-size:13px;font-weight:500;color:var(--text-secondary);
  background:none;border:none;border-radius:7px;
  cursor:pointer;text-align:left;font-family:var(--sans);transition:all .12s;
}
.lang-dd-item:hover{color:var(--text);background:var(--hover-bg-strong)}
.lang-dd-active{color:var(--accent)!important;font-weight:600}

.btn-site-link{
  display:inline-flex;align-items:center;gap:4px;
  font-size:11px;font-weight:500;color:var(--muted);
  text-decoration:none;transition:all .15s var(--ease);white-space:nowrap;
  padding:4px 8px;border-radius:var(--radius-xs);
}
.btn-site-link:hover{color:var(--text-secondary);background:var(--hover-bg)}
.btn-site-link svg{opacity:.5;flex-shrink:0}

/* ═══ BUTTONS ══════════════════════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:8px 18px;font-size:13px;font-weight:600;
  border-radius:var(--radius-sm);border:none;cursor:pointer;
  font-family:var(--sans);transition:all .2s var(--ease);white-space:nowrap;
}
.btn:active{transform:scale(.97)}

.btn-primary{background:var(--brand-gradient);color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(45,123,181,.25)}

.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}
.btn-ghost:hover{color:var(--text);background:var(--hover-bg);border-color:var(--border-hover)}

.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}

.btn-sm{padding:5px 12px;font-size:11px}
.btn-lg{padding:12px 28px;font-size:15px;border-radius:var(--radius-md)}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none!important}

/* ═══ BADGES ═══════════════════════════════════════════════════ */
.badge{
  display:inline-flex;align-items:center;gap:4px;
  padding:3px 9px;border-radius:var(--radius-full);font-size:10px;font-weight:600;
}
.badge-easy{background:var(--success-dim);color:var(--success)}
.badge-medium{background:var(--warn-dim);color:var(--warn)}
.badge-hard{background:var(--danger-dim);color:var(--danger)}
.badge-solved{background:var(--accent-dim);color:var(--accent)}
.badge-locked{background:var(--hover-bg);color:var(--muted)}
.badge-cat{background:var(--hover-bg);color:var(--text-secondary);font-size:10px}

/* ═══ TOAST ════════════════════════════════════════════════════ */
.toast-container{position:fixed;top:16px;right:16px;z-index:10000;display:flex;flex-direction:column;gap:8px}
.toast{
  padding:12px 14px;border-radius:var(--radius-md);
  background:var(--surface-2);border:1px solid var(--border);
  box-shadow:var(--shadow-md);font-size:13px;color:var(--text);
  animation:toastIn .3s var(--ease-out);min-width:240px;max-width:380px;
}
.toast-success{border-left:3px solid var(--success)}
.toast-error{border-left:3px solid var(--danger)}
.toast-info{border-left:3px solid var(--accent)}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}

/* ═══ MAIN LAYOUT ══════════════════════════════════════════════ */
.trainer-body{flex:1;display:flex;flex-direction:column;overflow:hidden}

/* ── Hub view ── */
.hub-view{flex:1;overflow-y:auto;padding:40px 32px}
.hub-head{text-align:center;margin-bottom:36px}
.hub-head h1{font-size:28px;font-weight:800;letter-spacing:-.5px;margin-bottom:8px}
.hub-head p{font-size:14px;color:var(--text-secondary);max-width:520px;margin:0 auto}

/* ═══ HERO VIEW (full-screen) ═════════════════════════════════ */
.hero-view{
  flex:1;display:flex;align-items:center;justify-content:center;
  background:var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%,rgba(45,123,181,.12),transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%,rgba(45,232,200,.06),transparent);
}
.hero-full{
  text-align:center;max-width:600px;padding:40px 24px;
  animation:heroIn .6s ease;
}
@keyframes heroIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
.hero-badge{
  display:inline-block;
  padding:6px 16px;border-radius:var(--radius-full);
  font-size:11px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;
  background:var(--accent-dim);color:var(--accent);
  margin-bottom:20px;
}
.hero-headline{
  font-size:42px;font-weight:800;letter-spacing:-1px;
  line-height:1.15;margin-bottom:16px;
  background:linear-gradient(135deg,var(--text),var(--accent));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-sub{
  font-size:17px;color:var(--text-secondary);line-height:1.6;
  max-width:480px;margin:0 auto 32px;
}
.btn-xl{
  padding:16px 48px;font-size:17px;font-weight:700;
  border-radius:var(--radius-md);letter-spacing:.3px;
}
.hero-cats{
  display:flex;justify-content:center;gap:10px;flex-wrap:wrap;
  margin-bottom:20px;
}
.hero-cat-card{
  display:flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:var(--radius-sm);
  background:var(--panel);border:1px solid var(--border);
  font-size:12px;font-weight:500;color:var(--text-secondary);
  transition:border-color .15s;
}
.hero-cat-card:hover{border-color:var(--border-hover)}
.hero-cat-icon{font-size:15px}
.hero-cat-name{white-space:nowrap}
.hero-cat-count{
  font-size:10px;font-weight:700;color:var(--accent);
  background:var(--accent-dim);padding:1px 5px;border-radius:var(--radius-full);
}
.hero-cat-more{
  color:var(--muted);font-weight:700;font-size:13px;
  justify-content:center;min-width:40px;
}
.hero-stds{
  display:flex;justify-content:center;gap:6px;flex-wrap:wrap;
  margin-bottom:16px;
}
.hero-std{
  padding:3px 10px;border-radius:var(--radius-full);
  font-size:10px;font-weight:600;letter-spacing:.4px;
  background:rgba(45,123,181,.08);color:var(--accent);
  border:1px solid rgba(45,123,181,.12);
}
.hero-meta{
  display:flex;justify-content:center;gap:8px;
  font-size:13px;color:var(--text-secondary);margin-bottom:28px;
}
.hero-sep{color:var(--muted);opacity:.5}
.hero-links{margin-top:16px}

.hub-stats{margin-bottom:24px;max-width:1200px;margin-left:auto;margin-right:auto;padding:0 24px}
.hub-progress-wrap{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.hub-progress-bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.hub-progress-fill{height:100%;background:var(--brand-gradient);border-radius:3px;transition:width .4s var(--ease)}
.hub-progress-label{font-size:12px;color:var(--muted);white-space:nowrap}
.hub-stats-row{display:flex;justify-content:flex-start;gap:32px}
.hub-stat{text-align:center}
.hub-stat-val{font-size:24px;font-weight:800;color:var(--accent)}
.hub-stat-lbl{font-size:11px;color:var(--text-secondary);margin-top:2px}

.hub-filters{display:flex;flex-direction:column;align-items:center;gap:0;margin-bottom:28px;position:relative}
.filter-row{
  display:flex;justify-content:center;gap:6px;flex-wrap:wrap;
  width:100%;max-width:1200px;padding:0 24px;
}
.filter-btn{
  padding:6px 14px;font-size:12px;font-weight:500;
  border-radius:var(--radius-full);border:1px solid var(--border);
  background:transparent;color:var(--text-secondary);cursor:pointer;
  transition:all .15s var(--ease);font-family:var(--sans);
}
.filter-btn:hover{color:var(--text);border-color:var(--border-hover)}
.filter-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.filter-reset{border-color:var(--danger);color:var(--danger);font-size:11px}
.filter-reset:hover{background:var(--danger-dim);border-color:var(--danger)}

/* ── Locked card hover ── */
.puzzle-card.locked{opacity:.65;cursor:pointer;border-style:dashed}
.puzzle-card.locked:hover{opacity:.85;border-color:var(--accent);transform:translateY(-1px)}

/* ── Puzzle grid ── */
.puzzle-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:16px;max-width:1200px;margin:0 auto;
}
.puzzle-card{
  background:var(--panel);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:20px;
  transition:all .2s var(--ease);cursor:pointer;position:relative;
  display:flex;flex-direction:column;gap:10px;
}
.puzzle-card:hover{border-color:var(--border-hover);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.puzzle-card.solved{border-color:rgba(52,211,153,.25)}
.puzzle-card.locked{opacity:.55;cursor:default;border-style:dashed}
.puzzle-card.locked:hover{transform:none;box-shadow:none}
.pc-lock{font-size:16px;opacity:.6}
.pc-context-blur{max-height:2.8em;overflow:hidden;-webkit-mask-image:linear-gradient(to bottom,#000 30%,transparent);mask-image:linear-gradient(to bottom,#000 30%,transparent)}
.btn-unlock{border-style:dashed!important}

.pc-head{display:flex;align-items:center;justify-content:space-between;gap:8px}
.pc-title{font-size:14px;font-weight:600}
.pc-meta{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:2px}
.pc-context{font-size:12px;color:var(--text-secondary);line-height:1.5;flex:1}
.pc-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:auto}
.pc-time{font-size:11px;color:var(--muted)}

/* ═══ PUZZLE VIEW — 2-column layout ═══════════════════════════ */
.puzzle-view{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}

/* ── Puzzle toolbar ── */
.puzzle-toolbar{
  display:flex;align-items:center;gap:12px;
  height:40px;padding:0 16px;
  background:var(--surface);border-bottom:1px solid var(--border);
  flex-shrink:0;
}
.pt-back{
  display:flex;align-items:center;gap:4px;
  font-size:12px;color:var(--text-secondary);cursor:pointer;
  background:none;border:none;font-family:var(--sans);
  padding:4px 8px;border-radius:var(--radius-xs);
  transition:all .15s var(--ease);
}
.pt-back:hover{color:var(--text);background:var(--hover-bg)}
.pt-back svg{flex-shrink:0}
.pt-center{flex:1;text-align:center;font-size:12px;font-weight:600;color:var(--text-secondary)}
.pt-right{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--muted)}
.pt-timer{font-family:var(--mono);font-size:11px}
.pt-streak{color:var(--warn);font-weight:600}

/* ── Challenge toolbar ── */
.ch-toolbar{justify-content:space-between;gap:8px}
.ch-exit{
  display:flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:var(--radius-xs);
  background:none;border:1px solid var(--border);
  color:var(--muted);cursor:pointer;transition:all .15s;flex-shrink:0;
}
.ch-exit:hover{color:var(--text);border-color:var(--border-hover);background:var(--hover-bg)}
.ch-progress-wrap{display:flex;align-items:center;gap:12px}
.ch-steps{display:flex;gap:4px;align-items:center}
.ch-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--border);transition:all .25s ease;flex-shrink:0;
}
.ch-dot.active{
  background:var(--accent);box-shadow:0 0 8px rgba(45,123,181,.4);
  transform:scale(1.2);
}
.ch-dot.done{background:var(--success)}
.ch-dot.fail{background:var(--danger)}
.ch-counter{font-size:12px;font-weight:600;color:var(--text-secondary)}
.ch-score-live{
  font-size:12px;font-weight:700;color:var(--accent);
  padding:3px 10px;border-radius:var(--radius-full);
  background:var(--accent-dim);
}

/* ── Progress bar ── */
.puzzle-progress{height:3px;background:var(--border);flex-shrink:0}
.puzzle-progress-fill{height:100%;background:var(--brand-gradient);transition:width .4s var(--ease)}

/* ── 2-column body ── */
.puzzle-columns{flex:1;display:flex;min-height:0;overflow:hidden}
.pv-graph{flex:3;min-width:0;position:relative;background:var(--bg);border-right:1px solid var(--border)}
.pv-graph svg{display:block}
.tr-node{cursor:grab}
.tr-node:active{cursor:grabbing}

.pv-stage{flex:2;display:flex;flex-direction:column;overflow-y:auto;background:var(--surface);min-width:320px;max-width:480px}

/* ── Stage panel sections ── */
.stage-header{padding:16px 20px;border-bottom:1px solid var(--border)}
.stage-header h2{font-size:15px;font-weight:700}
.stage-body{padding:20px;flex:1;display:flex;flex-direction:column;gap:16px}
.stage-footer{padding:16px 20px;border-top:1px solid var(--border);display:flex;gap:8px}

.ctx-block{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-sm);padding:14px;
  font-size:13px;line-height:1.6;color:var(--text-secondary);
}
.ctx-label{font-size:10px;font-weight:600;text-transform:uppercase;color:var(--muted);margin-bottom:6px;letter-spacing:.5px}

/* ── MCQ options ── */
.mcq-options{display:flex;flex-direction:column;gap:8px}
.mcq-opt{
  padding:12px 16px;border:1px solid var(--border);
  border-radius:var(--radius-sm);font-size:13px;line-height:1.5;
  cursor:pointer;transition:all .15s var(--ease);
  background:var(--panel);color:var(--text);text-align:left;
  font-family:var(--sans);width:100%;
}
.mcq-opt:hover{border-color:var(--border-hover);background:var(--hover-bg)}
.mcq-opt.selected{border-color:var(--accent);background:var(--accent-dim);color:var(--text)}
.mcq-opt.correct{border-color:var(--success);background:var(--success-dim);pointer-events:none}
.mcq-opt.wrong{border-color:var(--danger);background:var(--danger-dim);pointer-events:none}
.mcq-opt:disabled{cursor:default;opacity:.85}

/* ── Click instruction ── */
.click-instruction{
  padding:14px;background:var(--accent-dim);border:1px solid rgba(45,123,181,.2);
  border-radius:var(--radius-sm);font-size:13px;color:var(--accent);
  display:flex;align-items:center;gap:8px;
}

/* ── Explanation panel ── */
.expl-verdict{
  padding:16px;border-radius:var(--radius-sm);margin-bottom:12px;
  font-size:14px;font-weight:600;text-align:center;
}
.expl-verdict.correct{background:var(--success-dim);color:var(--success);border:1px solid rgba(52,211,153,.2)}
.expl-verdict.wrong{background:var(--danger-dim);color:var(--danger);border:1px solid rgba(248,113,113,.2)}

.expl-section{margin-bottom:16px}
.expl-section h4{
  font-size:11px;font-weight:600;text-transform:uppercase;
  color:var(--muted);letter-spacing:.5px;margin-bottom:6px;
}
.expl-section p{font-size:13px;line-height:1.6;color:var(--text-secondary)}

.expl-pattern{
  padding:10px 14px;background:var(--card);border-left:3px solid var(--accent);
  border-radius:0 var(--radius-xs) var(--radius-xs) 0;
  font-size:12px;font-weight:600;color:var(--accent);
}

/* ── VEIL Engine CTA ── */
.expl-engine-cta{
  margin-top:16px;padding:16px;
  background:linear-gradient(135deg,rgba(45,123,181,.08),rgba(45,232,200,.06));
  border:1px solid rgba(45,123,181,.18);
  border-radius:var(--radius-md);
  display:flex;align-items:flex-start;gap:14px;
}
.engine-cta-icon{
  font-size:24px;flex-shrink:0;
  width:40px;height:40px;display:flex;align-items:center;justify-content:center;
  background:var(--accent-dim);border-radius:var(--radius-sm);
  color:var(--accent);
}
.engine-cta-body{flex:1;min-width:0}
.engine-cta-text{font-size:12px;color:var(--text-secondary);line-height:1.5;margin-bottom:4px}
.engine-cta-rule{font-size:10px;color:var(--muted);font-family:var(--mono)}
.engine-cta-actions{display:flex;flex-direction:column;gap:6px;flex-shrink:0}

.expl-fix-label{
  font-size:10px;font-weight:600;text-transform:uppercase;
  color:var(--success);letter-spacing:.5px;margin:16px 0 8px;
}
.expl-fix-graph{
  border:1px solid rgba(52,211,153,.2);border-radius:var(--radius-sm);
  background:var(--bg);overflow:hidden;height:200px;
}

/* ── Hint area ── */
.hint-area{display:flex;flex-direction:column;gap:6px;margin-top:4px}
.hint-text{
  padding:10px 14px;background:var(--warn-dim);border:1px solid rgba(251,191,36,.15);
  border-radius:var(--radius-sm);font-size:12px;color:var(--warn);line-height:1.5;
  animation:fadeIn .2s var(--ease-out);
}
.hint-counter{font-size:11px;color:var(--muted);margin-top:2px}

/* ═══ REGISTRATION GATE ════════════════════════════════════════ */
.gate-overlay{
  position:fixed;inset:0;background:var(--overlay);backdrop-filter:blur(8px);
  z-index:200;
}
.gate-scroll{
  width:100%;height:100%;overflow-y:auto;
  display:flex;align-items:flex-start;justify-content:center;
  padding:40px 16px;
}
.gate-card{
  position:relative;
  background:var(--surface-2);border:1px solid rgba(45,123,181,.15);
  border-radius:var(--radius-lg);padding:40px;max-width:400px;width:100%;
  box-shadow:var(--shadow-lg);margin:auto;
}
.gate-close{
  position:absolute;top:12px;right:12px;
  width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius-xs);background:none;border:1px solid var(--border);
  color:var(--muted);cursor:pointer;transition:all .15s;
}
.gate-close:hover{color:var(--text);border-color:var(--border-hover);background:var(--hover-bg)}
.gate-card h2{font-size:20px;font-weight:700;margin-bottom:8px;text-align:center}
.gate-card p{font-size:13px;color:var(--text-secondary);text-align:center;margin-bottom:24px;line-height:1.5}
.gate-success-icon{
  width:56px;height:56px;border-radius:50%;margin:0 auto 16px;
  background:linear-gradient(135deg,rgba(45,232,200,.12),rgba(45,123,181,.08));
  display:flex;align-items:center;justify-content:center;
  color:var(--accent);font-size:26px;font-weight:700;
  border:1px solid rgba(45,232,200,.15);
}
.gate-google-wrap{margin:20px 0 8px}
.gate-google-sep{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.gate-google-sep::before,.gate-google-sep::after{content:"";flex:1;height:1px;background:var(--border)}
.gate-google-sep span{font-size:12px;color:var(--muted);font-weight:600;white-space:nowrap;text-transform:uppercase;letter-spacing:.05em}
.gate-google-btn{
  display:flex;align-items:center;justify-content:center;gap:10px;width:100%;
  padding:13px 16px;border-radius:var(--radius);
  background:rgba(255,255,255,.05);color:var(--text);
  font-size:14px;font-weight:600;font-family:inherit;text-decoration:none;
  transition:all .2s;border:1px solid var(--border);
}
.gate-google-btn:hover{
  background:rgba(255,255,255,.1);border-color:var(--border-hover);
  box-shadow:0 4px 16px rgba(45,123,181,.15);text-decoration:none;transform:translateY(-1px);
}
.gate-google-note{text-align:center;font-size:11px;color:var(--muted);margin-top:10px}
.gate-subtitle{text-align:center;color:var(--text-secondary);font-size:13px;line-height:1.5;margin-bottom:16px}
.gate-features{list-style:none;padding:0;margin:0 0 24px;text-align:left}
.gate-features li{padding:6px 0;font-size:13px;color:var(--text-secondary);display:flex;align-items:center;gap:8px}
.gate-features li::before{content:none}
:root[data-theme="light"] .gate-google-btn{background:var(--surface);border-color:var(--border)}
:root[data-theme="light"] .gate-google-btn:hover{background:var(--hover-bg);border-color:var(--border-hover)}

.res-cta-demo{text-align:center;padding:20px;margin-top:16px;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface-2)}
.res-cta-demo p{font-size:14px;color:var(--text-secondary);margin-bottom:12px}

/* ── Confirm dialog ── */
/* Анимация включает centering-transform, иначе dialogIn перебивает translate(-50%,-50%) (BL-030) */
.gate-overlay>.veil-dialog{
  position:absolute;top:50%;left:50%;
  animation:dialogCenterIn .2s ease-out;
  transform:translate(-50%,-50%);
}
@keyframes dialogCenterIn{
  from{opacity:0;transform:translate(-50%,-50%) scale(.95) translateY(8px)}
  to{opacity:1;transform:translate(-50%,-50%) scale(1) translateY(0)}
}
.veil-dialog{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:28px;
  width:400px;max-width:90vw;
  box-shadow:0 24px 80px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.03);
  animation:dialogIn .2s ease-out;
}
@keyframes dialogIn{from{opacity:0;transform:scale(.95) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}
.veil-dialog-title{
  font-size:16px;font-weight:700;color:var(--text);margin-bottom:8px;
}
.veil-dialog-msg{
  font-size:14px;color:var(--text-secondary);line-height:1.6;margin-bottom:24px;
}
.veil-dialog-actions{
  display:flex;gap:10px;justify-content:flex-end;
}
.veil-dialog-actions .btn{min-width:100px;justify-content:center}
.btn-danger{
  background:var(--danger);color:#fff;border:none;
  border-radius:var(--radius);padding:10px 20px;font-weight:600;
  cursor:pointer;transition:all .15s;
}
.btn-danger:hover{opacity:.9;box-shadow:0 4px 12px var(--danger-dim)}

.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:11px;color:var(--text-secondary);margin-bottom:6px;font-weight:500}
.form-group input{
  width:100%;padding:11px 14px;
  background:rgba(10,14,20,.6);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);
  font-size:13px;font-family:var(--sans);
  transition:border-color .15s var(--ease);
}
:root[data-theme="light"] .form-group input{background:var(--surface)}
.form-group input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-dim)}
.form-group input::placeholder{color:var(--muted)}

.form-row{display:flex;gap:12px}
.form-row .form-group{flex:1}

.form-separator{
  display:flex;align-items:center;gap:12px;margin:20px 0;
  color:var(--muted);font-size:12px;
}
.form-separator::before,.form-separator::after{content:'';flex:1;height:1px;background:var(--border)}

.gate-progress-ring{
  width:56px;height:56px;margin:0 auto 16px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;border:3px solid var(--accent);
  font-size:14px;font-weight:700;color:var(--accent);
}
.gate-hp{position:absolute;left:-9999px;top:-9999px;opacity:0;height:0;overflow:hidden}
.gate-consent{display:flex;align-items:flex-start;gap:6px;font-size:11px;color:var(--text-secondary);margin:12px 0 16px;line-height:1.4;cursor:pointer}
.gate-consent input{margin-top:2px;flex-shrink:0}
.badge-std{background:rgba(45,123,181,.1);color:var(--accent);font-size:9px;letter-spacing:.3px;text-transform:uppercase}
.gate-corp{
  margin-top:24px;padding:16px;
  background:linear-gradient(135deg,rgba(45,123,181,.06),rgba(45,232,200,.04));
  border:1px solid rgba(45,123,181,.12);border-radius:var(--radius-sm);
  text-align:center;
}
.gate-corp-title{font-size:13px;font-weight:700;color:var(--text);margin-bottom:4px}
.gate-corp-text{font-size:11px;color:var(--text-secondary);line-height:1.5;margin-bottom:10px}

/* ── Category completion modal ── */
.cat-complete-card{text-align:center}
.cat-complete-icon{
  font-size:40px;margin-bottom:12px;
  animation:celebratePop .5s ease;
}
@keyframes celebratePop{
  0%{transform:scale(0);opacity:0}
  60%{transform:scale(1.3)}
  100%{transform:scale(1);opacity:1}
}
.cat-complete-score{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  margin-top:16px;
}
.cat-complete-score-val{font-size:36px;font-weight:800;color:var(--accent)}
.cat-complete-score-lbl{font-size:11px;color:var(--text-secondary)}

/* ═══ RESULTS VIEW ════════════════════════════════════════════ */
.results-view{
  flex:1;overflow-y:auto;
  display:flex;align-items:flex-start;justify-content:center;
  padding:40px 24px;
}
.res-container{max-width:480px;width:100%;animation:heroIn .5s ease}

.res-card{
  background:var(--panel);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:32px;text-align:center;
  margin-bottom:16px;
}
.res-grade{
  display:inline-flex;align-items:center;justify-content:center;
  width:64px;height:64px;border-radius:50%;
  font-size:28px;font-weight:800;margin-bottom:12px;
  border:3px solid;
}
.res-grade-a{color:var(--success);border-color:var(--success);background:var(--success-dim)}
.res-grade-b{color:var(--accent);border-color:var(--accent);background:var(--accent-dim)}
.res-grade-c{color:var(--warn);border-color:var(--warn);background:var(--warn-dim)}
.res-grade-d{color:var(--danger);border-color:var(--danger);background:var(--danger-dim)}

.res-title{font-size:22px;font-weight:700;margin-bottom:20px}

.res-score-ring{margin-bottom:20px}
.res-score-val{font-size:48px;font-weight:800;color:var(--accent)}
.res-score-max{font-size:14px;color:var(--muted);font-weight:500}

.res-stats{
  display:flex;justify-content:center;gap:24px;
  padding:16px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  margin-bottom:20px;
}
.res-stat{display:flex;flex-direction:column;align-items:center;gap:2px}
.res-stat-val{font-size:20px;font-weight:700;color:var(--text)}
.res-stat-lbl{font-size:10px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}

.res-cats{text-align:left;margin-bottom:16px}
.res-cats h3{font-size:12px;font-weight:600;text-transform:uppercase;color:var(--muted);letter-spacing:.5px;margin-bottom:10px}
.res-cat-row{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.res-cat-label{font-size:12px;width:120px;flex-shrink:0;color:var(--text-secondary)}
.res-cat-bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.res-cat-fill{height:100%;background:var(--brand-gradient);border-radius:3px;transition:width .6s ease}
.res-cat-pct{font-size:11px;font-weight:600;color:var(--text-secondary);width:32px;text-align:right}

.res-puzzles{text-align:left}
.res-puzzle-row{
  display:flex;align-items:center;gap:8px;
  padding:6px 10px;border-radius:var(--radius-xs);
  font-size:12px;margin-bottom:2px;
}
.res-puzzle-row.ok{background:var(--success-dim)}
.res-puzzle-row.fail{background:var(--danger-dim)}
.res-puzzle-num{font-weight:700;color:var(--muted);width:20px}
.res-puzzle-name{flex:1;color:var(--text)}
.res-puzzle-icon{font-size:14px;font-weight:700}
.res-puzzle-row.ok .res-puzzle-icon{color:var(--success)}
.res-puzzle-row.fail .res-puzzle-icon{color:var(--danger)}
.res-puzzle-pts{font-size:11px;font-weight:600;color:var(--success)}

.res-cta-card{
  background:linear-gradient(135deg,rgba(45,123,181,.06),rgba(45,232,200,.04));
  border:1px solid rgba(45,123,181,.18);
  border-radius:var(--radius-lg);padding:28px;text-align:center;
  margin-bottom:16px;
}
.res-cta-card h3{font-size:15px;font-weight:700;margin-bottom:14px}
.res-features{
  list-style:none;text-align:left;margin-bottom:20px;
}
.res-features li{
  font-size:13px;color:var(--text-secondary);line-height:1.6;
  padding-left:20px;position:relative;margin-bottom:4px;
}
.res-features li::before{
  content:'\2713';position:absolute;left:0;color:var(--success);font-weight:700;
}

.res-bottom-actions{
  display:flex;gap:12px;justify-content:center;margin-top:8px;
}

/* ═══ PROFILE VIEW ═════════════════════════════════════════════ */
.profile-view{flex:1;overflow-y:auto;padding:40px 32px}
.profile-head{text-align:center;margin-bottom:32px}
.profile-head h1{font-size:24px;font-weight:700;margin-bottom:4px}
.profile-head p{font-size:13px;color:var(--text-secondary)}

.profile-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  max-width:600px;margin:0 auto 32px;
}
.profile-stat{
  text-align:center;padding:16px;background:var(--panel);
  border:1px solid var(--border);border-radius:var(--radius-md);
}
.profile-stat-val{font-size:28px;font-weight:800;color:var(--accent)}
.profile-stat-lbl{font-size:11px;color:var(--text-secondary);margin-top:4px}

.profile-account{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;margin-bottom:24px;
  background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius-lg);
}
.profile-account-info{display:flex;flex-direction:column;gap:2px}
.profile-account-email{font-size:13px;color:var(--text);font-weight:600}
.profile-account-method{font-size:11px;color:var(--muted)}

/* ── Category progress in profile ── */
.cat-progress-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));
  gap:10px;max-width:600px;margin:0 auto 28px;
}
.cat-progress-item{
  padding:12px;background:var(--panel);
  border:1px solid var(--border);border-radius:var(--radius-sm);
  transition:border-color .2s;
}
.cat-progress-item.complete{border-color:rgba(52,211,153,.3)}
.cat-progress-head{
  display:flex;justify-content:space-between;align-items:center;
  font-size:11px;font-weight:600;margin-bottom:6px;
}
.cat-progress-count{color:var(--muted);font-weight:500}
.cat-progress-bar{
  height:4px;background:var(--border);border-radius:2px;overflow:hidden;
}
.cat-progress-fill{
  height:100%;background:var(--brand-gradient);border-radius:2px;
  transition:width .4s var(--ease);
}
.cat-progress-badge{
  margin-top:6px;font-size:10px;font-weight:600;color:var(--success);
}

.profile-history{max-width:600px;margin:0 auto}
.profile-history h3{font-size:14px;font-weight:600;margin-bottom:12px}

.activity-list{display:flex;flex-direction:column;gap:6px}
.activity-item{
  display:flex;align-items:center;gap:8px;padding:8px 10px;
  border-radius:var(--radius-xs);background:var(--card);
  font-size:12px;border:1px solid var(--border);
}
.activity-icon{font-size:14px}
.activity-title{flex:1;color:var(--text)}
.activity-result{font-weight:600}
.activity-result.ok{color:var(--success)}
.activity-result.fail{color:var(--danger)}

/* ═══ EMPTY STATE ══════════════════════════════════════════════ */
.empty-state{text-align:center;padding:48px 24px;color:var(--muted)}
.empty-state-icon{font-size:36px;margin-bottom:12px;opacity:.5}
.empty-state-text{font-size:14px}

/* ═══ ANIMATIONS ═══════════════════════════════════════════════ */
.fade-in{animation:fadeIn .3s var(--ease-out)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

@keyframes pulseGreen{
  0%{stroke:#34d399;stroke-width:3}
  50%{stroke:#34d399;stroke-width:6;filter:drop-shadow(0 0 8px rgba(52,211,153,.6))}
  100%{stroke:#34d399;stroke-width:3}
}
@keyframes shakeNode{
  0%,100%{transform:translate(0,0)}
  20%{transform:translate(-4px,0)}
  40%{transform:translate(4px,0)}
  60%{transform:translate(-3px,0)}
  80%{transform:translate(3px,0)}
}
.node-correct rect,.node-correct circle{animation:pulseGreen .6s ease 2}
.node-wrong{animation:shakeNode .4s ease}

/* ── Badge start-here ── */
.badge-start-here{
  font-size:9px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;
  padding:2px 7px;border-radius:var(--radius-full);
  background:linear-gradient(135deg,rgba(251,191,36,.15),rgba(251,191,36,.08));
  color:#f59e0b;border:1px solid rgba(251,191,36,.25);white-space:nowrap;
}

/* ── Similar puzzles (in explanation) ── */
.similar-puzzles{margin-top:20px;border-top:1px solid var(--border);padding-top:16px}
.similar-puzzles h4{
  font-size:11px;font-weight:600;text-transform:uppercase;
  color:var(--muted);letter-spacing:.5px;margin-bottom:10px;
}
.similar-list{display:flex;flex-direction:column;gap:6px}
.similar-item{
  display:flex;align-items:center;gap:8px;width:100%;
  padding:9px 12px;background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-sm);cursor:pointer;text-align:left;
  font-family:var(--sans);font-size:12px;color:var(--text);
  transition:all .15s var(--ease);
}
.similar-item:hover{border-color:var(--accent);background:var(--hover-bg)}
.similar-item.solved{border-color:rgba(52,211,153,.2)}
.similar-item.locked{opacity:.6;cursor:pointer}
.similar-title{flex:1;font-size:12px}
.similar-check{color:var(--success);font-size:11px;font-weight:700}
.similar-lock{font-size:11px;opacity:.6}

/* ── Results achievement (registered user) ── */
.res-achievement{
  text-align:center;padding:20px;margin:16px 0;
  background:linear-gradient(135deg,rgba(45,232,200,.06),rgba(45,123,181,.04));
  border:1px solid rgba(45,232,200,.15);border-radius:var(--radius-md);
}
.res-achieve-icon{font-size:32px;margin-bottom:8px}
.res-achieve-text{font-size:15px;font-weight:700;color:var(--text);margin-bottom:4px}
.res-achieve-sub{font-size:12px;color:var(--text-secondary);margin-top:4px}

/* ═══ HUB SEARCH ═══════════════════════════════════════════════ */
.hub-search{max-width:1200px;margin:0 auto 12px;padding:0 24px;width:100%}
.hub-search-input{
  width:100%;padding:9px 14px;font-size:14px;
  background:var(--card);border:1px solid var(--border);border-radius:8px;
  color:var(--text);outline:none;transition:border-color .15s;
}
.hub-search-input:focus{border-color:var(--accent)}
.hub-search-input::placeholder{color:var(--muted)}

/* ═══ FOOTER ═══════════════════════════════════════════════════ */
.app-footer{
  padding:40px 0;border-top:1px solid var(--border);
  text-align:center;font-size:13px;color:var(--muted);flex-shrink:0;
}
.app-footer a{color:var(--text-secondary);text-decoration:none;transition:color .15s}
.app-footer a:hover{color:var(--accent2)}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 24px}
.footer-brand{
  display:flex;align-items:center;justify-content:center;
  gap:8px;font-weight:700;margin-bottom:6px;font-size:14px;color:var(--accent2);
}
.footer-brand .fb-veil{color:var(--accent)}
.footer-logo{height:22px;filter:drop-shadow(0 0 6px rgba(45,232,200,.15))}

/* ═══ RESPONSIVE ═══════════════════════════════════════════════ */
@media(max-width:900px){
  .pv-stage{min-width:280px;max-width:none;flex:1}
  .pv-graph{flex:1}
}
@media(max-width:768px){
  .puzzle-columns{flex-direction:column}
  .pv-graph{height:260px;flex:none;border-right:none;border-bottom:1px solid var(--border)}
  .pv-stage{flex:1;max-width:none;overflow-y:auto}
  .stage-footer{
    position:sticky;bottom:0;
    background:var(--bg);border-top:1px solid var(--border);
    padding:12px 16px;z-index:10;margin:0 -20px;
  }
  .hub-view{padding:24px 16px}
  .hub-stats{padding:0 16px}
  .hub-stats-row{gap:20px}
  .hub-stat-val{font-size:20px}
  .puzzle-grid{grid-template-columns:1fr}
  .profile-stats{grid-template-columns:repeat(2,1fr)}
  .app-nav{display:none}
  .app-logo-tag{display:none}
  .hero-headline{font-size:28px}
  .hero-sub{font-size:14px}
  .res-stats{gap:16px}
  /* Filter rows — fade right edge as scroll hint */
  .filter-row{
    flex-wrap:nowrap;overflow-x:auto;justify-content:flex-start;padding:0 16px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;
  }
  .filter-row::-webkit-scrollbar{display:none}
  .hub-filters::after{
    content:'';position:absolute;right:0;top:0;bottom:0;width:40px;
    background:linear-gradient(to left,var(--bg),transparent);
    pointer-events:none;
  }
  /* Challenge dots — smaller on mobile */
  .ch-dot{width:7px!important;height:7px!important}
  .ch-steps{gap:3px!important}
}
@media(max-width:480px){
  .btn-site-link span{display:none}
  .hero-headline{font-size:24px}
  .btn-xl{padding:14px 32px;font-size:15px}
  .res-cat-label{width:90px}
  .engine-cta-actions{flex-direction:row;flex-wrap:wrap}
}