@font-face{font-family:Fraunces Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/fraunces-vietnamese-wght-normal-CnvboYUG.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Fraunces Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/fraunces-latin-ext-wght-normal-Ca2vKHc0.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Fraunces Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/fraunces-latin-wght-normal-ukD16Tqj.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}html{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){html{--lightningcss-light: ;--lightningcss-dark:initial}}@font-face{font-family:Gentium Plus Web;src:url(/fonts/GentiumPlus-Regular.woff2)format("woff2");font-weight:400;font-style:normal;font-display:swap}:root{--font-ui:system-ui, "Segoe UI", sans-serif;--font-serif:"Fraunces Variable", "Fraunces", Georgia, "Times New Roman", serif;--font-tone:"Gentium Plus Web", "Gentium Plus", "Charis SIL", "Doulos SIL", serif;--font-mono:ui-monospace, Consolas, monospace;--bg:#faf8f4;--bg-panel:#f1ede6;--fg:#221f1b;--fg-muted:#7d766c;--accent:#5b4fc7;--accent-soft:#e9e6f8;--border:#e3ddd2;--tone:#a15207;--danger:#c2372c;--ok:#1e7f43;--band1:#4338ca;--band2:#7c3aed;--band3:#c026d3;--band4:#e2570d;--band5:#d9930a}@media (prefers-color-scheme:dark){:root{--bg:#17151a;--bg-panel:#201d24;--fg:#ece8e1;--fg-muted:#99928a;--accent:#978cf2;--accent-soft:#2d2846;--border:#322e38;--tone:#fbbf24;--danger:#ef6a5e;--ok:#4ade80;--band1:#818cf8;--band2:#a78bfa;--band3:#e879f9;--band4:#fb923c;--band5:#fbbf24}}*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);font-family:var(--font-ui);margin:0;font-size:15px}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}.app{flex-direction:column;height:100vh;display:flex}.topbar{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:.6rem 1.2rem;display:flex}.topbar h1{margin:0;font-size:1.15rem}.home-link{color:var(--fg);font-family:var(--font-serif);font-size:inherit;letter-spacing:.01em;cursor:pointer;background:0 0;border:none;padding:0;font-weight:600}.help-btn{border:1px solid var(--border);background:var(--bg-panel);width:30px;height:30px;color:var(--fg-muted);cursor:pointer;border-radius:50%;flex-shrink:0;place-items:center;margin-left:.8rem;font-size:.9rem;font-weight:600;display:grid}.help-btn:hover{color:var(--accent);border-color:var(--accent)}.calibrate-btn{border:1px solid var(--border);background:var(--bg-panel);color:var(--fg);cursor:pointer;border-radius:999px;margin-left:auto;margin-right:1rem;padding:.35rem 1rem;font-size:.85rem}.approach-toggle{background:var(--bg-panel);border-radius:999px;gap:.25rem;padding:.2rem;display:flex}.approach-toggle button{color:var(--fg-muted);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:.35rem 1rem;font-size:.9rem}.approach-toggle button.active{background:var(--accent);color:#fff}.columns{flex:1;grid-template-columns:215px 265px 1fr;min-height:0;display:grid}.collections,.exercise-list{border-right:1px solid var(--border);padding:.6rem;overflow-y:auto}.nav-group-title{letter-spacing:.09em;text-transform:uppercase;color:var(--fg-muted);margin:.9rem .5rem .3rem;font-size:.68rem;font-weight:600}.nav-group-title:first-child{margin-top:.2rem}.collections button{text-align:left;width:100%;color:var(--fg);cursor:pointer;text-transform:capitalize;background:0 0;border:none;border-radius:8px;justify-content:space-between;gap:.5rem;padding:.4rem .55rem;font-size:.82rem;display:flex}.collections button:hover{background:var(--bg-panel)}.collections button.active{background:var(--accent-soft);color:var(--accent)}.collections .count{color:var(--fg-muted);font-variant-numeric:tabular-nums;font-size:.75rem}.exercise-list input{border:1px solid var(--border);background:var(--bg-panel);width:100%;color:var(--fg);font-family:var(--font-ui);border-radius:8px;margin-bottom:.6rem;padding:.45rem .6rem}.exercise-list ul{margin:0;padding:0;list-style:none}.exercise-list li button{text-align:left;width:100%;color:var(--fg);cursor:pointer;background:0 0;border:none;border-radius:8px;gap:.5rem;padding:.4rem .5rem;font-size:.83rem;display:flex}.exercise-list li button:hover{background:var(--bg-panel)}.exercise-list li button.active{background:var(--accent-soft);color:var(--accent)}.exercise-list .num{color:var(--fg-muted);font-variant-numeric:tabular-nums;min-width:2ch}.practice-pane{padding:2rem 2.4rem 3rem;overflow-y:auto}.practice{max-width:46rem;margin:0 auto}.practice .crumb{color:var(--fg-muted);letter-spacing:.08em;text-transform:uppercase;font-size:.72rem}.practice .sentence{font-family:var(--font-serif);text-wrap:balance;margin:.5rem 0 1.4rem;font-size:2.4rem;font-weight:550;line-height:1.22}.practice .hint{color:var(--fg-muted);margin:0 0 .7rem;font-size:.85rem}.variation-chips{flex-wrap:wrap;gap:.45rem;margin-bottom:.9rem;display:flex}.chip{border:1px solid var(--border);background:var(--bg-panel);color:var(--fg);cursor:pointer;border-radius:999px;padding:.4rem .95rem;font-size:.85rem;transition:background .15s,border-color .15s}.chip:hover{border-color:var(--accent)}.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.variation-panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:14px;padding:1rem 1.2rem;animation:.18s ease-out fade-in}@keyframes fade-in{0%{opacity:0;transform:translateY(3px)}to{opacity:1;transform:none}}.variation-panel h3{font-family:var(--font-serif);color:var(--accent);margin:0 0 .6rem;font-size:1.05rem;font-weight:600}.variation-panel dl{grid-template-columns:auto 1fr;gap:.3rem 1rem;margin:0;font-size:.9rem;display:grid}.variation-panel dt{color:var(--fg-muted);letter-spacing:.08em;text-transform:uppercase;align-self:baseline;padding-top:.15rem;font-size:.7rem}.variation-panel dd{margin:0}.variation-panel .note{color:var(--fg-muted);margin:.7rem 0 0;font-size:.85rem;font-style:italic}.ipa-sentence{margin:0 0 .7rem;font-size:1.1rem}.ipa-marker{background:var(--accent-soft);border-radius:6px;padding:0 .25rem}.tobi{font-family:var(--font-mono);font-size:.9em}.tone-letters{color:var(--tone);font-family:var(--font-tone)}.tone-letters.big{font-size:1.7rem}.tone-tip{cursor:help;-webkit-text-decoration:underline dotted;text-decoration:underline dotted;-webkit-text-decoration-color:var(--fg-muted);text-decoration-color:var(--fg-muted);text-underline-offset:3px}.recorder-panel{flex-direction:column;gap:.9rem;margin-top:1.4rem;display:flex}.recorder-controls{align-items:center;gap:1rem;display:flex}.record-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:999px;padding:.6rem 1.5rem;font-size:.95rem;font-weight:600;transition:transform .12s}.record-btn:hover{transform:scale(1.03)}.record-btn.recording{background:var(--danger);animation:1.4s ease-in-out infinite rec-pulse}@keyframes rec-pulse{0%,to{box-shadow:0 0 #dc3c2d73}50%{box-shadow:0 0 0 9px #dc3c2d00}}.record-hint{color:var(--fg-muted);font-size:.78rem}.recorder-panel .error{color:var(--danger);font-size:.85rem}.overlay-select{background:var(--bg-panel);border:1px solid var(--border);border-radius:999px;align-items:center;gap:.15rem;margin-left:auto;padding:.15rem;display:flex}.overlay-label{color:var(--fg-muted);letter-spacing:.07em;text-transform:uppercase;padding:0 .5rem;font-size:.65rem}.overlay-select button{color:var(--fg-muted);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:.28rem .7rem;font-size:.78rem}.overlay-select button.active{background:var(--accent);color:#fff}.pitch-canvas{border:1px solid var(--border);background:var(--bg);border-radius:12px;width:100%;height:240px}.take-result{background:var(--bg-panel);border:1px solid var(--border);border-radius:14px;grid-template-columns:1fr auto;align-items:center;gap:.6rem 1.2rem;padding:1rem 1.2rem;animation:.2s ease-out fade-in;display:grid}.result-rows{flex-direction:column;gap:.55rem;min-width:0;display:flex}.result-row{flex-wrap:wrap;align-items:baseline;gap:.8rem;display:flex}.result-label{color:var(--fg-muted);letter-spacing:.08em;text-transform:uppercase;min-width:9.5rem;font-size:.7rem}.result-target{color:var(--fg-muted);font-size:.85rem}.take-result audio{grid-column:1/-1;width:100%;height:36px}.score-ring{place-items:center;width:72px;height:72px;display:grid;position:relative}.score-ring svg{position:absolute;inset:0;transform:rotate(-90deg)}.score-ring .ring-bg{fill:none;stroke:var(--border);stroke-width:6px}.score-ring .ring-fg{fill:none;stroke:currentColor;stroke-width:6px;stroke-linecap:round;transition:stroke-dashoffset .7s cubic-bezier(.22,1,.36,1)}.score-num{font-variant-numeric:tabular-nums;font-size:1.25rem;font-weight:700}.score-caption{text-align:center;color:var(--fg-muted);letter-spacing:.07em;text-transform:uppercase;margin-top:.2rem;font-size:.65rem;display:block}.s0{color:var(--danger)}.s1{color:#d97706}.s2{color:#ca8a04}.s3,.s4{color:var(--ok)}.modal-backdrop{z-index:10;background:#0f0c0a80;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--bg);color:var(--fg);border:1px solid var(--border);border-radius:16px;flex-direction:column;gap:.8rem;max-width:26rem;padding:1.5rem 1.7rem;animation:.18s ease-out fade-in;display:flex}.modal h2{font-family:var(--font-serif);margin:0;font-size:1.2rem}.modal button{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;align-self:flex-start;padding:.5rem 1rem}.modal .capturing{font-size:1.05rem}.muted{color:var(--fg-muted)}.view-nav{scrollbar-width:none;gap:.2rem;margin-left:1rem;display:flex;overflow-x:auto}.view-nav button{color:var(--fg-muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:999px;padding:.35rem .8rem;font-size:.87rem}.view-nav button.active{color:var(--fg);background:var(--bg-panel);font-weight:600}.learn-pane{flex:1;padding:1.6rem 2rem 4rem;overflow-y:auto}.learn-tabs{width:max-content;margin:0 auto 1.4rem}.learn-track{max-width:46rem;margin:0 auto}.learn-track h2{font-family:var(--font-serif);margin:0 0 .6rem;font-size:1.7rem}.learn-track h3{font-family:var(--font-serif);margin:2rem 0 .5rem;font-size:1.2rem}.learn-track p,.learn-track li{font-size:.95rem;line-height:1.55}.learn-track code{background:var(--bg-panel);border:1px solid var(--border);border-radius:5px;padding:.05rem .3rem;font-size:.85em}.notation-example{background:var(--bg-panel);border:1px solid var(--border);border-radius:10px;padding:.7rem 1rem;font-size:1.05rem}.demo-grid{grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:.9rem;margin:.9rem 0;display:grid}.demo-card{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;padding:.8rem .95rem}.demo-head{justify-content:space-between;align-items:center;margin-bottom:.3rem;display:flex}.demo-symbol{font-size:1.5rem}.demo-symbol.tobi{font-size:1.05rem;font-weight:600}.demo-card h4{margin:.5rem 0 .25rem;font-size:.92rem}.demo-card p{color:var(--fg-muted);margin:0;font-size:.82rem;line-height:1.45}.contour-graph{border-radius:8px;width:100%;height:auto}.play-btn{border:1px solid var(--border);background:var(--bg);color:var(--accent);cursor:pointer;border-radius:999px;padding:.3rem .75rem;font-size:.85rem}.play-btn:hover{border-color:var(--accent)}.try-card{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:.7rem;margin:.9rem 0;padding:.9rem 1.1rem;display:flex}.try-prompt{margin:0;font-size:.95rem}.try-controls{align-items:center;gap:.7rem;display:flex}.record-btn.small{padding:.45rem 1.1rem;font-size:.85rem}.try-card .pitch-canvas{height:130px}.try-verdict{margin:0;font-size:.9rem}.try-verdict.pass{color:var(--ok)}.try-verdict.fail{color:var(--fg-muted)}.quiz-card{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;margin:.9rem 0;padding:1rem 1.2rem}.quiz-card h4{margin:0 0 .6rem;font-size:1rem}.quiz-progress{color:var(--fg-muted);font-size:.8rem;font-weight:400}.quiz-prompt p{margin:0 0 .5rem}.quiz-choices{flex-wrap:wrap;gap:.5rem;margin-top:.6rem;display:flex}.quiz-choice{border:1px solid var(--border);background:var(--bg);color:var(--fg);cursor:pointer;font-size:1rem;font-family:var(--font-tone), var(--font-mono);border-radius:10px;padding:.5rem 1rem}.quiz-choice:hover{border-color:var(--accent)}.quiz-choice.right{border-color:var(--ok);color:var(--ok);font-weight:700}.quiz-choice.wrong{border-color:var(--danger);color:var(--danger)}.quiz-feedback p{margin:.7rem 0 .5rem;font-size:.9rem}.quiz-tally{margin:.3rem 0 .8rem;font-size:1.05rem}.learn-track h4{margin:1.3rem 0 .35rem;font-size:.98rem}.stress-widget{background:var(--bg-panel);border:1px solid var(--border);border-radius:12px;margin:.7rem 0;padding:.9rem 1.1rem}.stress-widget .variation-chips{margin-bottom:.6rem}.stress-widget .chip{background:var(--bg)}.stress-widget .chip.active{background:var(--accent)}.stress-implication{min-height:1.4em;margin:0;font-size:.95rem}.learn-footnote{color:var(--fg-muted);border-top:1px solid var(--border);margin-top:2rem;padding-top:.8rem;font-size:.82rem}@media (width<=900px){.learn-pane{padding:1rem 1rem 3rem}}.tip-wrap{display:inline-block;position:relative}.tip-pop{background:var(--fg);width:max-content;max-width:250px;color:var(--bg);font-family:var(--font-ui);text-align:left;z-index:30;pointer-events:none;border-radius:8px;padding:.45rem .65rem;font-size:.78rem;font-weight:400;line-height:1.4;animation:.12s ease-out fade-in;position:absolute;bottom:calc(100% + 7px);left:50%;transform:translate(-50%);box-shadow:0 4px 14px #0000002e}.intro-card,.setup-card{background:var(--bg-panel);border:1px solid var(--border);border-radius:14px;margin-bottom:1.4rem;padding:1.1rem 1.3rem;animation:.2s ease-out fade-in}.intro-card h2,.setup-card h3{font-family:var(--font-serif);margin:0 0 .6rem;font-size:1.15rem}.intro-card ol{flex-direction:column;gap:.35rem;margin:0 0 .9rem;padding-left:1.2rem;font-size:.9rem;display:flex}.setup-card p{max-width:34rem;margin:0 0 .9rem;font-size:.9rem}.intro-actions{align-items:center;gap:.7rem;display:flex}.ghost-btn{border:1px solid var(--border);color:var(--fg);cursor:pointer;background:0 0;border-radius:999px;padding:.5rem 1.2rem;font-size:.9rem}.live-meter{align-items:center;gap:.8rem;display:flex}.live-meter-track{background:linear-gradient(90deg, var(--band1), var(--band2), var(--band3), var(--band4), var(--band5));opacity:.85;border-radius:999px;flex:1;height:8px;position:relative}.live-meter-dot{background:var(--bg);border:3px solid var(--fg);border-radius:50%;width:16px;height:16px;position:absolute;top:50%;transform:translate(-50%,-50%)}.live-meter-label{color:var(--fg-muted);font-variant-numeric:tabular-nums;min-width:5.5ch;font-size:.8rem}.browse-btn{border:1px solid var(--border);background:var(--bg-panel);color:var(--fg);cursor:pointer;border-radius:8px;margin-right:.8rem;padding:.35rem .7rem;font-size:1rem;display:none}.drawer-backdrop{z-index:20;background:#0f0c0a80;position:fixed;inset:0}.drawer{background:var(--bg);border-right:1px solid var(--border);z-index:21;flex-direction:column;width:min(85vw,340px);animation:.2s ease-out drawer-in;display:flex;position:fixed;top:0;bottom:0;left:0;overflow-y:auto}@keyframes drawer-in{0%{opacity:.6;transform:translate(-12%)}to{opacity:1;transform:none}}.drawer .collections,.drawer .exercise-list{border-right:none;display:block;overflow-y:visible}.drawer .collections{border-bottom:1px solid var(--border)}@media (width<=900px){.columns{grid-template-columns:1fr}.columns>.collections,.columns>.exercise-list{display:none}.browse-btn{display:inline-flex}.topbar h1{font-size:1rem}.calibrate-btn{margin-right:.5rem;padding:.35rem .7rem}.practice-pane{padding:1.2rem 1rem 2.5rem}.practice .sentence{font-size:1.8rem}.pitch-canvas{height:190px}.chip,.collections button,.exercise-list li button{padding-top:.6rem;padding-bottom:.6rem}.take-result{grid-template-columns:1fr}}