@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";
:root{--tia-navy:#1e3a5f;--tia-navy-900:#15263f;--tia-navy-700:#284a75;--tia-blue:#2563eb;--tia-blue-600:#1d4fd8;--tia-blue-50:#eff4ff;--tia-amber:#f59e0b;--tia-amber-50:#fef3c7;--tia-bg:#f8fafc;--tia-surface:#fff;--tia-surface-2:#f1f5f9;--tia-fg:#0f172a;--tia-fg-muted:#64748b;--tia-fg-subtle:#94a3b8;--tia-success:#10b981;--tia-success-50:#d1fae5;--tia-error:#ef4444;--tia-error-50:#fee2e2;--tia-warning:#f59e0b;--tia-border:#e2e8f0;--tia-border-strong:#cbd5e1;--tia-focus-ring:#2563eb59;--tia-shadow-card:0 1px 3px #0000001a;--tia-shadow-raised:0 4px 12px #0f172a14;--tia-shadow-overlay:0 12px 32px #0f172a2e;--tia-font-sans:"Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;--tia-font-mono:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--tia-radius:6px;--tia-radius-sm:4px;--tia-radius-md:8px;--tia-radius-lg:12px;--tia-ease:cubic-bezier(.2, .7, .2, 1);--tia-dur:.18s;--tia-dur-fast:.12s;--tia-dur-slow:.26s;--display-font:"Source Serif 4", "Source Serif Pro", Georgia, serif;--accent:var(--tia-navy);--ink:var(--tia-fg);--ink-muted:var(--tia-fg-muted);--ink-subtle:var(--tia-fg-subtle);--paper:#fff;--rule:1px solid var(--tia-border);--rule-strong:1px solid var(--tia-border-strong);--rule-dark:1px solid #ffffff1a;--tia-space-page:48px;--tia-space-section:56px}*,:before,:after{box-sizing:border-box}a{color:inherit;text-decoration:none}button,a,input,textarea,select{font-family:inherit}.display{font-family:var(--display-font);letter-spacing:-.02em;color:var(--tia-navy-900);text-wrap:balance;margin:0;font-weight:600;line-height:1.05}.display em{font-style:italic;font-weight:500}.eyebrow{font:600 11px/1 var(--tia-font-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-muted);align-items:baseline;gap:8px;display:inline-flex}.eyebrow .num{color:var(--accent);font-variant-numeric:tabular-nums}.lede{color:var(--ink-muted);text-wrap:pretty;max-width:560px;margin:0;font-size:17px;line-height:1.55}.tnum{font-variant-numeric:tabular-nums}.kbd{font:500 11px/1 var(--tia-font-mono);background:var(--tia-surface-2);border:var(--rule);color:var(--ink-muted);border-radius:4px;padding:3px 6px}.app{grid-template-columns:240px 1fr;height:100vh;min-height:0;display:grid}.app.no-chrome{grid-template-columns:1fr}.sidebar{color:#ffffffd9;background:#0f172a;flex-direction:column;padding:28px 0 20px;display:flex;position:relative;overflow:hidden}.sidebar .brand{font-family:var(--display-font);letter-spacing:-.02em;color:#fff;padding:0 28px 28px;font-size:26px;font-weight:600}.sidebar .brand .ia{color:inherit}.sidebar .group{font:600 10px/1 var(--tia-font-sans);letter-spacing:.14em;text-transform:uppercase;color:#fff6;padding:24px 28px 10px}.sidebar .nav-item{color:#ffffffa6;cursor:pointer;transition:color var(--tia-dur) var(--tia-ease), background var(--tia-dur) var(--tia-ease);border-left:2px solid #0000;grid-template-columns:1fr auto;align-items:center;gap:14px;padding:11px 28px;font-size:14px;display:grid}.sidebar .nav-item:hover{color:#fff;background:#ffffff08}.sidebar .nav-item.active{color:#fff;background:#ffffff14;border-left-color:#fff;font-weight:500}.sidebar .nav-item .nav-num{font-family:var(--display-font);font-variant-numeric:tabular-nums;color:#ffffff52;font-size:11px}.sidebar .nav-item.active .nav-num{color:#fff}.sidebar .nav-item .pro-tag{font:600 9px/1 var(--tia-font-sans);letter-spacing:.12em;color:var(--tia-amber);background:#f59e0b29;border-radius:3px;padding:3px 6px}.sidebar .nav-item .sim-count{font:600 11px/1 var(--tia-font-sans);font-variant-numeric:tabular-nums;color:#fff;text-align:center;background:#ffffff24;border-radius:999px;min-width:20px;padding:3px 7px}.sidebar .nav-item.active .sim-count{background:#ffffff38}.sidebar .spacer{flex:1}.sidebar .foot{border-top:var(--rule-dark);margin-top:18px;padding:18px 28px 0}.sidebar .foot .name{font-family:var(--display-font);color:#fff;letter-spacing:-.01em;font-size:14px;font-weight:600}.sidebar .foot a.name-link{cursor:pointer;transition:opacity var(--tia-dur) var(--tia-ease);display:inline-block}.sidebar .foot a.name-link:hover{opacity:.7}.sidebar .foot .sub{color:#ffffff80;letter-spacing:.04em;text-transform:uppercase;margin-top:2px;font-size:11px}.sidebar .foot .logout{color:#ffffff8c;cursor:pointer;transition:color var(--tia-dur) var(--tia-ease);align-items:center;gap:6px;margin-top:10px;font-size:12px;display:inline-flex}.sidebar .foot .logout:hover{color:#fff}.main{background:var(--paper);flex-direction:column;min-width:0;display:flex;overflow:auto}.page-head{border-bottom:var(--rule);padding:22px var(--tia-space-page);background:var(--paper);z-index:20;align-items:center;gap:24px;display:flex;position:sticky;top:0}.page-head .crumb{letter-spacing:.04em;text-transform:uppercase;color:var(--ink-muted);align-items:center;gap:10px;font-size:12px;display:flex}.page-head .crumb .num{font-family:var(--display-font);color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:0;font-weight:600}.page-head .crumb .sep{color:var(--ink-subtle)}.page-head .right{align-items:center;gap:14px;margin-left:auto;display:flex}.page-head .streak{background:var(--tia-amber-50);color:#92400e;border-radius:var(--tia-radius);letter-spacing:.02em;align-items:center;gap:6px;padding:6px 12px;font-size:12px;font-weight:600;display:inline-flex}.page-head .icon-btn{width:36px;height:36px;color:var(--ink-muted);cursor:pointer;border-radius:var(--tia-radius);transition:color var(--tia-dur) var(--tia-ease), background var(--tia-dur) var(--tia-ease);justify-content:center;align-items:center;display:inline-flex}.page-head .icon-btn:hover{color:var(--ink);background:var(--tia-surface-2)}.page-body{padding:var(--tia-space-page);flex:1;width:100%;max-width:1200px;margin:0 auto}.btn{font:600 14px/1 var(--tia-font-sans);border-radius:var(--tia-radius);cursor:pointer;transition:background var(--tia-dur) var(--tia-ease), color var(--tia-dur) var(--tia-ease), border-color var(--tia-dur) var(--tia-ease);white-space:nowrap;border:1px solid #0000;align-items:center;gap:8px;padding:11px 18px;text-decoration:none;display:inline-flex}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent);color:#fff}.btn.primary:not(:disabled):hover{background:var(--tia-navy-900)}.btn.secondary{color:var(--ink);border-color:var(--tia-border-strong);background:0 0}.btn.secondary:not(:disabled):hover{background:var(--tia-surface-2)}.btn.ghost{color:var(--ink);background:0 0;padding-left:4px;padding-right:4px}.btn.dark{background:var(--tia-navy-900);color:#fff}.btn.dark:hover{background:var(--accent)}.btn.lg{padding:14px 24px;font-size:15px}.btn.sm{padding:7px 12px;font-size:13px}.btn.block{justify-content:center;width:100%}.btn.danger{background:var(--tia-error);color:#fff}.field{margin-bottom:18px;display:block}.field label{font:500 11px/1 var(--tia-font-sans);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);margin-bottom:8px;display:block}.input{width:100%;font:400 15px/1.4 var(--tia-font-sans);border:1px solid var(--tia-border);border-radius:var(--tia-radius);background:var(--paper);color:var(--ink);transition:border-color var(--tia-dur), box-shadow var(--tia-dur);outline:none;padding:12px 14px}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--tia-focus-ring)}.field .err{color:var(--tia-error);align-items:center;gap:6px;margin-top:6px;font-size:12px;display:inline-flex}.field.has-error .input{border-color:var(--tia-error)}.field.has-error .input:focus{box-shadow:0 0 0 3px #ef444440}.card{background:var(--paper);border:var(--rule);border-radius:var(--tia-radius-md);padding:24px}.card.raised{box-shadow:var(--tia-shadow-raised)}.card.dark{background:var(--tia-navy-900);color:#fff;border-color:var(--tia-navy-900);position:relative;overflow:hidden}.card.dark:before{content:"";pointer-events:none;background:radial-gradient(circle,#2563eb52,#0000 60%);width:420px;height:420px;position:absolute;bottom:-160px;right:-160px}.card.dark>*{z-index:1;position:relative}.num-grid{border-top:var(--rule);border-bottom:var(--rule);display:grid}.num-grid.cols-3{grid-template-columns:repeat(3,1fr)}.num-grid.cols-4{grid-template-columns:repeat(4,1fr)}.num-grid>.cell{border-right:var(--rule);padding:28px 28px 28px 0}.num-grid>.cell:last-child{border-right:0;padding-right:0}.num-grid>.cell:not(:first-child){padding-left:28px}.num-grid .cell-num{font-family:var(--display-font);color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:0;margin-bottom:18px;font-size:13px;font-weight:600}.num-grid .cell-lab{letter-spacing:.12em;text-transform:uppercase;color:var(--ink-muted);margin-bottom:12px;font-size:11px}.num-grid .cell-val{font-family:var(--display-font);letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--ink);font-size:44px;font-weight:600;line-height:1}.num-grid .cell-val .unit{color:var(--ink-muted);margin-left:6px;font-size:16px;font-weight:500}.num-grid .cell-sub{color:var(--ink-muted);margin-top:10px;font-size:12px;line-height:1.5}.sec-head{grid-template-columns:1fr auto;align-items:end;gap:48px;margin-bottom:32px;padding-top:8px;display:grid}.sec-head .title{font-family:var(--display-font);letter-spacing:-.02em;color:var(--tia-navy-900);margin:6px 0 0;font-size:28px;font-weight:600;line-height:1.1}.sec-head .desc{color:var(--ink-muted);max-width:360px;margin:0;font-size:14px;line-height:1.6}.sec-head .actions{gap:10px;display:flex}.section-eyebrow{font:600 11px/1 var(--tia-font-sans);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-muted);border-top:var(--rule);align-items:baseline;gap:10px;margin-top:12px;margin-bottom:24px;padding-top:56px;display:flex}.section-eyebrow .num{color:var(--accent);font-family:var(--display-font);font-variant-numeric:tabular-nums;letter-spacing:0;font-weight:600}.section-eyebrow.no-rule{border-top:0;padding-top:0}.block-badge{font:600 10px/1 var(--tia-font-sans);letter-spacing:.12em;text-transform:uppercase;border-radius:var(--tia-radius-sm);background:var(--tia-blue-50);color:var(--tia-blue-600);align-items:center;gap:6px;padding:4px 8px;display:inline-flex}.block-badge .dot{background:currentColor;border-radius:50%;width:5px;height:5px}.block-badge.b1{background:var(--tia-blue-50);color:var(--tia-blue-600)}.block-badge.b2{color:#065f46;background:#10b9811f}.block-badge.b3{background:var(--tia-amber-50);color:#92400e}.tag{font:600 11px/1 var(--tia-font-sans);letter-spacing:.06em;text-transform:uppercase;border-radius:var(--tia-radius-sm);background:var(--tia-surface-2);color:var(--ink-muted);align-items:center;gap:6px;padding:5px 10px;display:inline-flex}.tag.blue{background:var(--tia-blue-50);color:var(--tia-blue-600)}.tag.amber{background:var(--tia-amber-50);color:#92400e}.tag.success{background:var(--tia-success-50);color:#065f46}.tag.error{background:var(--tia-error-50);color:#991b1b}.tag.navy{background:var(--tia-navy-900);color:#fff}.tag.outline{border:1px solid var(--tia-border-strong);color:var(--ink);background:0 0}.bar-track{background:var(--tia-surface-2);border-radius:999px;height:4px;overflow:hidden}.bar-track .fill{background:var(--accent);height:100%;transition:width var(--tia-dur-slow) var(--tia-ease);border-radius:999px}.bar-track.thick{height:6px}.q-card{border:var(--rule);border-radius:var(--tia-radius-md);background:var(--paper);padding:40px 44px}.q-head{align-items:center;gap:12px;margin-bottom:16px;display:flex}.q-head .q-num{font-family:var(--display-font);color:var(--accent);font-variant-numeric:tabular-nums;font-size:13px;font-weight:600}.q-head .q-topic{letter-spacing:.1em;text-transform:uppercase;color:var(--ink-muted);font-size:11px}.q-text{font-family:var(--display-font);letter-spacing:-.01em;color:var(--tia-navy-900);text-wrap:pretty;margin:0 0 28px;font-size:22px;font-weight:600;line-height:1.3}.q-options{flex-direction:column;gap:8px;display:flex}.q-option{background:var(--paper);border:1px solid var(--tia-border);border-radius:var(--tia-radius);cursor:pointer;color:var(--ink);text-align:left;transition:border-color var(--tia-dur), background var(--tia-dur);grid-template-columns:28px 1fr;align-items:center;gap:16px;padding:16px 18px;font-size:14.5px;display:grid}.q-option:hover{border-color:var(--tia-border-strong)}.q-option .letter{border:1px solid var(--tia-border-strong);width:24px;height:24px;font:600 11px/1 var(--tia-font-sans);color:var(--ink-muted);border-radius:50%;justify-content:center;align-items:center;display:inline-flex}.q-option.selected{border-color:var(--accent);background:var(--tia-blue-50)}.q-option.selected .letter{background:var(--accent);color:#fff;border-color:var(--accent)}.q-option.correct{border-color:var(--tia-success);background:var(--tia-success-50)}.q-option.correct .letter{background:var(--tia-success);color:#fff;border-color:var(--tia-success)}.q-option.wrong{border-color:var(--tia-error);background:var(--tia-error-50)}.q-option.wrong .letter{background:var(--tia-error);color:#fff;border-color:var(--tia-error)}.score-pill{border:var(--rule);border-radius:var(--tia-radius);background:var(--paper);flex-direction:column;align-items:center;min-width:64px;padding:10px 14px;display:inline-flex}.score-pill .n{font-family:var(--display-font);color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.01em;font-size:20px;font-weight:600;line-height:1}.score-pill .pct{letter-spacing:.06em;color:var(--ink-muted);font-variant-numeric:tabular-nums;margin-top:4px;font-size:10px}.score-pill.great{background:var(--tia-success-50);border-color:#10b98166}.score-pill.great .n,.score-pill.great .pct{color:#065f46}.score-pill.mid{background:var(--tia-amber-50);border-color:#f59e0b66}.score-pill.mid .n,.score-pill.mid .pct{color:#92400e}.score-pill.poor{background:var(--tia-error-50);border-color:#ef444466}.score-pill.poor .n,.score-pill.poor .pct{color:#991b1b}:where(button,a,input,textarea,select):focus-visible{box-shadow:0 0 0 3px var(--tia-focus-ring);border-radius:var(--tia-radius);outline:2px solid #0000}.countdown-bar{background:var(--tia-navy-900);color:#fff;font:500 13px/1 var(--tia-font-sans);justify-content:space-between;align-items:center;padding:10px 48px;display:flex}.countdown-bar .left{align-items:center;gap:14px;display:flex}.countdown-bar .dot{background:var(--tia-amber);border-radius:50%;width:6px;height:6px;box-shadow:0 0 0 4px #f59e0b2e}.countdown-bar .meta{color:#fff9;letter-spacing:.08em;text-transform:uppercase;font-size:11px}.countdown-bar .nums .n{font-variant-numeric:tabular-nums;font-weight:600}@media (max-width:960px){.app{grid-template-columns:1fr}.sidebar{display:none}.page-head,.page-body{padding-left:20px;padding-right:20px}.num-grid.cols-3,.num-grid.cols-4{grid-template-columns:repeat(2,1fr)}.sec-head{grid-template-columns:1fr;gap:16px}}