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<!DOCTYPE html>
<html lang="es">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>墨 · MO — Chinese Card Study</title>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link
href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;700&family=Noto+Sans+SC:wght@300;400&family=Cormorant+Garamond:ital,wght@0,300;0,400;1,300&family=Space+Mono:wght@400;700&display=swap"
rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/hanzi-writer@3.5/dist/hanzi-writer.min.js"></script>
<style>
/* ── css/variables.css ── */
/* ════════════════════════════════════════════
DESIGN TOKENS
════════════════════════════════════════════ */
:root {
--bg: #080a0e;
--surface: rgba(255,255,255,0.04);
--surface2: rgba(255,255,255,0.08);
--border: rgba(255,255,255,0.07);
--border2: rgba(255,255,255,0.14);
--text: #e8dcc8;
--text2: #8a7f70;
--text3: #4a4540;
--accent: #c8392b;
--accent2: #e8a020;
--gold: #d4a843;
--card-bg: #10141c;
--card-border: rgba(200,180,140,0.12);
--shadow: 0 32px 80px rgba(0,0,0,0.8), 0 8px 24px rgba(0,0,0,0.5);
--font-zh: 'Noto Serif SC', serif;
--font-body: 'Cormorant Garamond', serif;
--font-mono: 'Space Mono', monospace;
--radius: 20px;
--ease-out: cubic-bezier(0.23, 1, 0.32, 1);
--transition: 0.4s var(--ease-out);
--card-scale: 1;
}
body.light {
--bg: #f5f0e8;
--surface: rgba(0,0,0,0.04);
--surface2: rgba(0,0,0,0.07);
--border: rgba(0,0,0,0.08);
--border2: rgba(0,0,0,0.15);
--text: #1a1208;
--text2: #6b5d48;
--text3: #b0a090;
--card-bg: #fdf8f0;
--card-border: rgba(80,50,20,0.15);
--shadow: 0 32px 80px rgba(100,60,20,0.2), 0 8px 24px rgba(100,60,20,0.1);
}
/* ── css/components.css ── */
/* ════════════════════════════════════════════
ATOMIC UI COMPONENTS
════════════════════════════════════════════ */
/* Buttons */
.btn-primary { padding:14px 40px; background:var(--accent); color:#fff; border-radius:40px; font-family:var(--font-mono); font-size:12px; letter-spacing:3px; display:none; transition:all var(--transition); }
.btn-primary:hover { background:#e84030; transform:translateY(-2px); box-shadow:0 12px 40px rgba(200,57,43,0.4); }
.btn-ghost { padding:10px 24px; color:var(--text2); border:1px solid var(--border2); border-radius:40px; font-family:var(--font-mono); font-size:10px; letter-spacing:2px; transition:all var(--transition); }
.btn-ghost:hover { color:var(--text); border-color:var(--text2); }
.btn-ghost-accent { color:var(--accent2); border-color:rgba(232,160,32,0.3); }
.btn-ghost-accent:hover { background:rgba(232,160,32,0.08); border-color:var(--accent2); color:var(--accent2); }
.icon-btn { width:34px; height:34px; border-radius:50%; border:1px solid var(--border); background:var(--surface); display:flex; align-items:center; justify-content:center; font-size:15px; color:var(--text2); transition:all 0.2s; }
.icon-btn:hover { background:var(--surface2); color:var(--text); border-color:var(--border2); }
.mode-toggle { display:flex; background:var(--surface); border:1px solid var(--border); border-radius:30px; padding:3px; }
.mode-btn { padding:4px 12px; border-radius:24px; font-family:var(--font-mono); font-size:9px; letter-spacing:1px; color:var(--text3); transition:all 0.2s; }
.mode-btn.active { background:var(--accent); color:#fff; }
.rate-btn { padding:11px 22px; border-radius:40px; border:1.5px solid; font-family:var(--font-mono); font-size:10px; letter-spacing:1.5px; text-transform:uppercase; transition:all var(--transition); }
.rate-btn:hover { transform:translateY(-3px); }
.rate-btn:active { transform:scale(0.97); }
.btn-wrong { background:rgba(138,42,42,0.15); border-color:rgba(138,42,42,0.4); color:#e07070; }
.btn-almost { background:rgba(122,96,32,0.15); border-color:rgba(122,96,32,0.4); color:#d4a843; }
.btn-correct { background:rgba(58,138,90,0.15); border-color:rgba(58,138,90,0.4); color:#5ab87a; }
.btn-wrong:hover { background:rgba(138,42,42,0.3); box-shadow:0 8px 28px rgba(138,42,42,0.3); }
.btn-almost:hover { background:rgba(122,96,32,0.3); box-shadow:0 8px 28px rgba(122,96,32,0.3); }
.btn-correct:hover { background:rgba(58,138,90,0.3); box-shadow:0 8px 28px rgba(58,138,90,0.3); }
.btn-hide { padding:6px 16px; border-radius:40px; border:1px solid var(--border2); font-family:var(--font-mono); font-size:9px; letter-spacing:1.5px; color:var(--text3); transition:all 0.2s; }
.btn-hide:hover { color:var(--accent); border-color:var(--accent); }
.stroke-btn { position:absolute; top:13px; right:14px; padding:4px 10px; border:1px solid var(--border2); border-radius:20px; background:var(--surface); font-family:var(--font-mono); font-size:9px; letter-spacing:1px; color:var(--text2); transition:all 0.2s; z-index:5; }
.stroke-btn:hover { border-color:#4a8fa8; color:#4a8fa8; }
.btn-stroke-replay,.btn-stroke-close { padding:8px 20px; border-radius:30px; font-family:var(--font-mono); font-size:10px; letter-spacing:2px; transition:all 0.2s; }
.btn-stroke-replay { border:1px solid var(--border2); color:var(--accent2); }
.btn-stroke-replay:hover { background:var(--surface2); border-color:var(--accent2); }
.btn-stroke-close { border:1px solid var(--border); color:var(--text3); }
.btn-stroke-close:hover { color:var(--text); border-color:var(--border2); }
.btn-key-save { font-family:var(--font-mono); font-size:9px; letter-spacing:2px; color:var(--accent2); padding:8px 10px; border:1px solid rgba(232,160,32,0.3); border-radius:20px; transition:all 0.2s; white-space:nowrap; width: 100%; background: transparent; cursor: pointer; }
.btn-key-save:hover { background:rgba(232,160,32,0.1); }
.btn-key-save.saved { color:#5ab87a; border-color:rgba(90,184,122,0.4); }
.audio-btn, #sentence-audio-btn { width:28px; height:28px; border-radius:50%; border:1px solid var(--border2); background:var(--surface); color:var(--text2); display:flex; align-items:center; justify-content:center; transition:all 0.2s; z-index:5; font-size: 10px; cursor: pointer; }
.audio-btn { position:absolute; top:13px; left:14px; }
.audio-btn:hover, #sentence-audio-btn:hover { border-color:var(--accent2); background:rgba(232,160,32,0.08); color:var(--accent2); }
.audio-btn.playing, #sentence-audio-btn.playing { border-color:var(--accent2); background:rgba(232,160,32,0.12); color:var(--accent2); }
.audio-btn.loading, #sentence-audio-btn.loading { color:var(--text3); border-color:var(--border); pointer-events:none; }
.audio-btn.loading svg, #sentence-audio-btn.loading svg { animation:spin 0.9s linear infinite; transform-origin:center; }
/* Stats & Forms */
.stat-pill { display:flex; align-items:center; gap:5px; padding:5px 11px; background:var(--surface); border:1px solid var(--border); border-radius:20px; font-family:var(--font-mono); font-size:10px; color:var(--text2); }
.stat-pill .val { color:var(--text); font-weight:700; }
.stat-pill.streak .val { color:var(--accent2); }
.stat-pill.acc .val { color:#5ab87a; }
.scale-wrap { display:flex; align-items:center; gap:7px; padding:4px 10px; background:var(--surface); border:1px solid var(--border); border-radius:20px; }
.scale-wrap span { font-family:var(--font-mono); font-size:9px; color:var(--text3); }
#scale-slider { -webkit-appearance:none; appearance:none; width:68px; height:3px; background:var(--border2); border-radius:2px; outline:none; cursor:pointer; }
#scale-slider::-webkit-slider-thumb { -webkit-appearance:none; width:12px; height:12px; border-radius:50%; background:var(--accent2); cursor:pointer; box-shadow:0 0 5px rgba(232,160,32,0.5); }
#scale-slider::-moz-range-thumb { width:12px; height:12px; border-radius:50%; background:var(--accent2); border:none; cursor:pointer; }
.progress-track { position:fixed; top:60px; left:0; right:0; height:2px; background:var(--surface2); z-index:30; }
.progress-fill { height:100%; background:linear-gradient(90deg,var(--accent),var(--accent2)); box-shadow:0 0 8px var(--accent); transition:width 0.6s var(--ease-out); }
/* Toast */
#toast { position:fixed; bottom:108px; left:50%; transform:translateX(-50%) translateY(10px); background:var(--surface2); border:1px solid var(--border2); border-radius:30px; padding:9px 18px; font-family:var(--font-mono); font-size:10px; letter-spacing:2px; color:var(--text2); opacity:0; pointer-events:none; z-index:50; transition:opacity 0.25s ease,transform 0.25s ease; white-space:nowrap; }
#toast.show { opacity:1; transform:translateX(-50%) translateY(0); }
/* ── css/screens.css ── */
/* ════════════════════════════════════════════
SCREEN SYSTEM
════════════════════════════════════════════ */
.screen { position:fixed; inset:0; z-index:20; display:flex; flex-direction:column; align-items:center; justify-content:center; opacity:0; visibility:hidden; transition:opacity 0.4s ease, visibility 0s 0.4s; }
.screen.active { opacity:1; visibility:visible; transition:opacity 0.4s ease, visibility 0s 0s; }
/* ════════════════════════════════════════════
IMPORT SCREEN
════════════════════════════════════════════ */
#screen-import { gap:26px; padding:40px; text-align:center; }
.logo { font-family:var(--font-zh); font-size:72px; font-weight:700; color:var(--text); letter-spacing:-4px; line-height:1; }
.logo span { color:var(--accent); }
.logo-sub { font-family:var(--font-mono); font-size:11px; letter-spacing:6px; color:var(--text3); text-transform:uppercase; margin-top:6px; }
.drop-zone { width:380px; height:185px; border:1.5px dashed var(--border2); border-radius:var(--radius); display:flex; flex-direction:column; align-items:center; justify-content:center; gap:10px; cursor:pointer; transition:all var(--transition); background:var(--surface); position:relative; overflow:hidden; }
.drop-zone::before { content:''; position:absolute; inset:0; background:radial-gradient(circle at 50% 50%,var(--accent) 0%,transparent 70%); opacity:0; transition:opacity 0.3s; }
.drop-zone:hover::before,.drop-zone.drag-over::before { opacity:0.06; }
.drop-zone:hover { border-color:var(--accent); }
.drop-icon { font-size:34px; }
.drop-text { font-family:var(--font-body); font-size:18px; color:var(--text2); font-style:italic; }
.drop-hint { font-family:var(--font-mono); font-size:10px; color:var(--text3); letter-spacing:2px; }
#file-input { display:none; }
.word-count-badge { font-family:var(--font-mono); font-size:11px; color:var(--accent2); letter-spacing:3px; display:none; }
.api-keys-container { display: flex; flex-direction: column; gap: 8px; width: 380px; margin: 0 auto; }
.api-key-wrap { display:flex; align-items:center; gap:8px; padding:8px 14px; background:var(--surface); border:1px solid var(--border2); border-radius:var(--radius); width: 100%; }
.api-key-label { font-family:var(--font-mono); font-size:9px; letter-spacing:1.5px; color:var(--text3); white-space:nowrap; width: 85px; text-align: left; }
#minimax-key, #openrouter-key { flex:1; background:transparent; border:none; outline:none; font-family:var(--font-mono); font-size:11px; color:var(--text); caret-color:var(--accent2); width: 100%; }
#minimax-key::placeholder, #openrouter-key::placeholder { color:var(--text3); }
.import-actions { display:flex; gap:10px; flex-wrap:wrap; justify-content:center; align-items:center; }
.storage-stat { font-family:var(--font-mono); font-size:9px; letter-spacing:1px; color:var(--text3); text-align:center; }
/* ════════════════════════════════════════════
STUDY SCREEN — TOP BAR & BOTTOM AREA
════════════════════════════════════════════ */
#screen-study { flex-direction:column; gap:0; padding:0; }
.top-bar { position:fixed; top:0; left:0; right:0; height:60px; display:flex; align-items:center; justify-content:space-between; padding:0 22px; z-index:30; background:linear-gradient(to bottom,rgba(8,10,14,0.92) 0%,transparent 100%); }
body.light .top-bar { background:linear-gradient(to bottom,rgba(245,240,232,0.92) 0%,transparent 100%); }
.top-left { display:flex; align-items:center; gap:12px; }
.top-right { display:flex; align-items:center; gap:9px; }
.top-logo { font-family:var(--font-zh); font-size:22px; font-weight:700; color:var(--text); letter-spacing:-1px; }
.top-logo span { color:var(--accent); }
.bottom-area { position:fixed; bottom:0; left:0; right:0; padding:14px 28px 26px; display:flex; flex-direction:column; align-items:center; gap:11px; z-index:30; background:linear-gradient(to top,rgba(8,10,14,1) 0%,rgba(8,10,14,0.97) 55%,rgba(8,10,14,0) 100%); }
body.light .bottom-area { background:linear-gradient(to top,rgba(245,240,232,1) 0%,rgba(245,240,232,0.97) 55%,rgba(245,240,232,0) 100%); }
.flip-hint { font-family:var(--font-mono); font-size:9px; letter-spacing:3px; color:var(--text3); text-transform:uppercase; animation:blink 2.2s ease-in-out infinite; }
@keyframes blink { 0%,100%{opacity:0.4} 50%{opacity:1} }
.rating-row { display:flex; gap:11px; opacity:0; transform:translateY(8px); visibility:hidden; transition:opacity 0.3s ease,transform 0.3s ease, visibility 0s 0.3s; }
.rating-row.visible { opacity:1; transform:translateY(0); visibility:visible; transition:opacity 0.3s ease,transform 0.3s ease, visibility 0s 0s; }
.key-hints { position:fixed; bottom:94px; right:18px; display:flex; flex-direction:column; gap:4px; opacity:0.28; pointer-events:none; }
.key-hint { display:flex; align-items:center; gap:5px; font-family:var(--font-mono); font-size:8px; color:var(--text2); }
kbd { padding:2px 5px; border:1px solid var(--border2); border-radius:3px; font-size:8px; color:var(--text3); font-family:var(--font-mono); }
/* ════════════════════════════════════════════
RESULTS SCREEN
════════════════════════════════════════════ */
#screen-results { gap:22px; padding:40px; text-align:center; }
.results-title { font-family:var(--font-zh); font-size:52px; font-weight:700; color:var(--text); letter-spacing:-2px; }
.results-subtitle { font-family:var(--font-body); font-size:20px; font-style:italic; color:var(--text2); }
.results-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; width:100%; max-width:420px; }
.result-card { background:var(--surface); border:1px solid var(--border); border-radius:14px; padding:18px 10px; display:flex; flex-direction:column; align-items:center; gap:5px; }
.result-val { font-family:var(--font-mono); font-size:34px; font-weight:700; line-height:1; }
.result-val.green{color:#5ab87a;} .result-val.red{color:#e07070;} .result-val.gold{color:var(--gold);}
.result-label { font-family:var(--font-mono); font-size:9px; letter-spacing:2px; color:var(--text3); text-transform:uppercase; }
.results-actions { display:flex; gap:12px; flex-wrap:wrap; justify-content:center; }
.results-actions .btn-primary { display:inline-block; }
@media(max-width:520px){
.stat-pill.acc,.scale-wrap,.key-hints{display:none;}
.rate-btn{padding:10px 14px;font-size:9px;}
}
/* ── css/card.css ── */
/* ════════════════════════════════════════════
CARD — SCENE / FLIPPER / FACES
════════════════════════════════════════════ */
.card-area { flex:1; display:flex; align-items:center; justify-content:center; width:100%; padding:70px 20px 155px; }
.card-scene {
width:520px; height:350px;
max-width:calc(100vw - 40px);
transform:scale(var(--card-scale));
transform-origin:center center;
transition:transform 0.15s var(--ease-out);
perspective:1400px;
}
.card-scene.entering { animation:scene-enter 0.45s var(--ease-out) both; }
@keyframes scene-enter {
from { opacity:0; transform:scale(calc(var(--card-scale)*0.94)) translateY(22px); }
to { opacity:1; transform:scale(var(--card-scale)) translateY(0); }
}
.card-flipper {
width:100%; height:100%;
position:relative;
transform-style:preserve-3d;
transition:transform 0.65s var(--ease-out);
}
.card-flipper.flipped { transform:rotateY(180deg); }
.card-face {
position:absolute; inset:0;
backface-visibility:hidden;
-webkit-backface-visibility:hidden;
border-radius:var(--radius);
background:var(--card-bg);
border:1px solid var(--card-border);
box-shadow:var(--shadow);
display:flex; flex-direction:column;
align-items:center; justify-content:center;
gap:14px; padding:32px; overflow:hidden;
}
.card-back { transform:rotateY(180deg); }
.card-wm { position:absolute; font-family:var(--font-zh); font-size:130px; font-weight:700; line-height:1; color:rgba(200,57,43,0.03); pointer-events:none; transition:color 0.5s; }
body.light .card-wm { color:rgba(100,40,20,0.05); }
.card-wm.tl { top:-20px; left:4px; }
.card-wm.br { bottom:-20px; right:4px; transform:rotate(180deg); }
.card-label { position:absolute; top:16px; font-family:var(--font-mono); font-size:9px; letter-spacing:3px; color:var(--text3); text-transform:uppercase; }
.mastery-badge { position:absolute; bottom:14px; display:flex; align-items:center; gap:7px; }
.mastery-lbl { font-family:var(--font-mono); font-size:8px; letter-spacing:2px; color:var(--text3); }
.mastery-dots { display:flex; gap:4px; }
.mdot { width:6px; height:6px; border-radius:50%; background:var(--border2); transition:background 0.3s; }
.mdot.lit { background:var(--accent2); }
.mdot.hidden-lit { background:var(--accent); }
.hanzi-display { font-family:var(--font-zh); font-size:clamp(52px,9vw,86px); font-weight:400; color:var(--text); letter-spacing:6px; text-align:center; line-height:1.2; position:relative; z-index:1; }
.pinyin-row { height:28px; display:flex; align-items:center; justify-content:center; }
.pinyin-display { font-family:'Noto Sans SC',sans-serif; font-size:17px; font-weight:300; color:var(--accent2); letter-spacing:4px; text-align:center; opacity:0; transform:translateY(6px); transition:opacity 0.5s ease,transform 0.5s ease; }
.pinyin-display.visible { opacity:1; transform:translateY(0); }
.back-hanzi { font-family:var(--font-zh); font-size:22px; color:var(--text2); letter-spacing:3px; }
.back-pinyin { font-family:'Noto Sans SC',sans-serif; font-size:12px; color:var(--accent2); opacity:0.7; letter-spacing:2px; }
.translation { font-family:var(--font-body); font-style:italic; font-size:clamp(16px,3vw,26px); color:var(--text); text-align:center; letter-spacing:0.5px; line-height:1.4; }
/* ════════════════════════════════════════════
SENTENCE IN CARD
════════════════════════════════════════════ */
.card-sentence {
margin-top: 18px;
width: 100%; display: flex; flex-direction: column; gap: 8px;
align-items: center; justify-content: center;
opacity: 0; visibility: hidden;
transition: opacity 0.3s ease, visibility 0s 0.3s;
}
.card-sentence.visible { opacity: 1; visibility: visible; transition: opacity 0.3s ease, visibility 0s 0s; }
#sentence-front {
flex-direction: row; flex-wrap: wrap;
}
#sentence-zh { font-family:var(--font-zh); font-size: 1rem; color: var(--text); text-align: center; cursor: default; }
#sentence-zh mark { background: none; color: var(--accent); font-weight: 600; }
#sentence-zh.skeleton { width: 150px; height: 16px; background: rgba(255,255,255,0.05); border-radius: 4px; animation: blink 1.5s infinite; }
body.light #sentence-zh.skeleton { background: rgba(0,0,0,0.05); }
#sentence-es { font-family: var(--font-body); font-style: italic; font-size: 0.9rem; color: var(--text2); text-align: center; }
/* ════════════════════════════════════════════
STROKE MODAL
════════════════════════════════════════════ */
.modal-overlay { position:fixed; inset:0; z-index:100; display:flex; align-items:center; justify-content:center; background:rgba(0,0,0,0.82); opacity:0; visibility:hidden; transition:opacity 0.3s ease, visibility 0s 0.3s; }
.modal-overlay.open { opacity:1; visibility:visible; transition:opacity 0.3s ease, visibility 0s 0s; }
.stroke-panel { background:var(--card-bg); border:1px solid var(--card-border); border-radius:var(--radius); padding:26px 30px 22px; display:flex; flex-direction:column; align-items:center; gap:18px; box-shadow:var(--shadow); min-width:260px; }
.stroke-title { font-family:var(--font-zh); font-size:18px; color:var(--text2); letter-spacing:3px; }
#stroke-chars { display:flex; gap:14px; flex-wrap:wrap; justify-content:center; }
.stroke-char-wrap { display:flex; flex-direction:column; align-items:center; gap:6px; }
.stroke-char-lbl { font-family:var(--font-zh); font-size:13px; color:var(--text2); }
.stroke-actions { display:flex; gap:10px; }
/* ── css/animations.css ── */
/* ════════════════════════════════════════════
FEEDBACK ANIMATIONS
════════════════════════════════════════════ */
@keyframes shake { 0%,100%{transform:translateX(0)} 20%{transform:translateX(-10px)} 40%{transform:translateX(10px)} 60%{transform:translateX(-6px)} 80%{transform:translateX(6px)} }
.anim-shake { animation:shake 0.4s ease; }
@keyframes correct-glow { 0%{box-shadow:var(--shadow),0 0 0 0 rgba(90,184,122,0.5)} 50%{box-shadow:var(--shadow),0 0 0 18px rgba(90,184,122,0)} 100%{box-shadow:var(--shadow)} }
.anim-correct { animation:correct-glow 0.5s ease; }
@keyframes spin { to { transform:rotate(360deg); } }
/* ── css/main.css ── */
/* ════════════════════════════════════════════
RESET & BASE
════════════════════════════════════════════ */
*,*::before,*::after { margin:0; padding:0; box-sizing:border-box; }
html,body { width:100%; height:100%; overflow:hidden; font-family:var(--font-body); background:var(--bg); color:var(--text); user-select:none; transition:background 0.5s,color 0.5s; }
button { font-family:inherit; cursor:pointer; border:none; background:none; }
</style>
</head>
<body>
<canvas id="ink-canvas"></canvas>
<canvas id="particle-canvas"></canvas>
<!-- ══ IMPORT SCREEN ══ -->
<div id="screen-import" class="screen active">
<div class="logo">墨<span>·</span>MO</div>
<div class="logo-sub">Chinese Card Study System</div>
<div class="drop-zone" id="drop-zone">
<div class="drop-icon">漢</div>
<div class="drop-text">Drop your dictionary JSON</div>
<div class="drop-hint">or click to browse</div>
<input type="file" id="file-input" accept=".json">
</div>
<div class="word-count-badge" id="word-count-badge"></div>
<button class="btn-primary" id="btn-start">BEGIN STUDY →</button>
<div class="api-keys-container">
<div class="api-key-wrap">
<span class="api-key-label">MINIMAX</span>
<input type="password" id="minimax-key" placeholder="Enter API key…" autocomplete="off" spellcheck="false">
</div>
<div class="api-key-wrap">
<span class="api-key-label">OPENROUTER</span>
<input type="password" id="openrouter-key" placeholder="Enter API key…" autocomplete="off" spellcheck="false">
</div>
<button class="btn-key-save" id="btn-key-save">Save Keys</button>
</div>
<div class="import-actions">
<button class="btn-ghost" id="btn-demo">Demo words</button>
<button class="btn-ghost btn-ghost-accent" id="btn-full-export">⬇ Backup</button>
<button class="btn-ghost btn-ghost-accent" id="btn-full-import-trigger">⬆ Restore</button>
<input type="file" id="full-file-input" accept=".json" style="display:none">
</div>
<span class="storage-stat" id="storage-stat"></span>
</div>
<!-- ══ STUDY SCREEN ══ -->
<div id="screen-study" class="screen">
<div class="top-bar">
<div class="top-left">
<div class="top-logo">墨<span>·</span></div>
<div class="mode-toggle">
<button class="mode-btn active" id="mode-btn-zh">汉→</button>
<button class="mode-btn" id="mode-btn-es">→汉</button>
</div>
</div>
<div class="top-right">
<div class="stat-pill streak">🔥 <span class="val" id="stat-streak">0</span></div>
<div class="stat-pill acc">✓ <span class="val" id="stat-acc">0%</span></div>
<div class="stat-pill">📚 <span class="val" id="stat-prog">0/0</span></div>
<div class="scale-wrap">
<span>A</span>
<input type="range" id="scale-slider" min="0.6" max="1.6" step="0.05" value="1">
<span>A</span>
</div>
<button class="icon-btn" id="btn-theme">◐</button>
<button class="icon-btn" id="btn-end">⊗</button>
</div>
</div>
<div class="progress-track">
<div class="progress-fill" id="progress-fill"></div>
</div>
<div class="card-area">
<div class="card-scene" id="card-scene">
<div class="card-flipper" id="card-flipper">
<div class="card-face" id="card-front">
<div class="card-wm tl" id="wm-tl">一</div>
<div class="card-wm br" id="wm-br">字</div>
<span class="card-label" id="front-label">CHINESE</span>
<button class="stroke-btn" id="stroke-btn">Stroke ✦</button>
<button class="audio-btn" id="audio-btn" title="Play pronunciation">🔊</button>
<div class="hanzi-display" id="hanzi-display">漢字</div>
<div class="pinyin-row">
<div class="pinyin-display" id="pinyin-display"></div>
</div>
<div class="card-sentence" id="sentence-front">
<div id="sentence-zh"></div>
<button id="sentence-audio-btn" aria-label="Audio"></button>
</div>
<div class="mastery-badge">
<span class="mastery-lbl">掌握</span>
<div class="mastery-dots" id="mastery-dots-front"></div>
</div>
</div>
<div class="card-face card-back">
<span class="card-label" id="back-label">ESPAÑOL</span>
<div class="back-hanzi" id="back-hanzi"></div>
<div class="back-pinyin" id="back-pinyin"></div>
<div class="translation" id="translation"></div>
<div class="card-sentence" id="sentence-back">
<div id="sentence-es"></div>
</div>
<div class="mastery-badge">
<span class="mastery-lbl">掌握</span>
<div class="mastery-dots" id="mastery-dots-back"></div>
</div>
</div>
</div>
</div>
</div>
<div class="bottom-area">
<div class="flip-hint" id="flip-hint">CLICK CARD TO REVEAL · SPACE</div>
<div class="rating-row" id="rating-row">
<button class="rate-btn btn-wrong" id="btn-wrong"> ✗ Incorrecto</button>
<button class="rate-btn btn-almost" id="btn-almost"> ≈ Casi</button>
<button class="rate-btn btn-correct" id="btn-correct">✓ Correcto</button>
</div>
<button class="btn-hide" id="btn-hide">👁 Ocultar esta palabra · 4</button>
</div>
<div class="key-hints">
<div class="key-hint"><kbd>Space</kbd> flip / flip back</div>
<div class="key-hint"><kbd>1</kbd> ✗ <kbd>2</kbd> ≈ <kbd>3</kbd> ✓</div>
<div class="key-hint"><kbd>4</kbd> hide forever</div>
</div>
</div>
<!-- ══ RESULTS SCREEN ══ -->
<div id="screen-results" class="screen">
<div class="results-title" id="res-title">完了</div>
<div class="results-subtitle" id="res-subtitle">Session complete</div>
<div class="results-grid">
<div class="result-card">
<div class="result-val green" id="res-correct">0</div>
<div class="result-label">Correctas</div>
</div>
<div class="result-card">
<div class="result-val red" id="res-wrong">0</div>
<div class="result-label">Incorrectas</div>
</div>
<div class="result-card">
<div class="result-val gold" id="res-streak">0</div>
<div class="result-label">Mejor racha</div>
</div>
</div>
<div class="results-actions">
<button class="btn-primary" id="btn-again">Estudiar de nuevo</button>
<button class="btn-ghost" id="btn-new-dict">Nuevo diccionario</button>
</div>
</div>
<!-- ══ STROKE MODAL ══ -->
<div class="modal-overlay" id="stroke-modal">
<div class="stroke-panel">
<div class="stroke-title" id="stroke-title">笔顺</div>
<div id="stroke-chars"></div>
<div class="stroke-actions">
<button class="btn-stroke-replay" id="btn-stroke-replay">↺ Replay</button>
<button class="btn-stroke-close" id="btn-stroke-close">Close</button>
</div>
</div>
</div>
<div id="toast"></div>
<!-- ══ MAIN LOGIC ══ -->
<script src="mo-common.js"></script>
<script>
/* ── js/state.js ── */
/* ──────────────────────────────────────────────
SETTINGS MODULE
────────────────────────────────────────────── */
const Settings = (() => {
const D = { theme: 'dark', cardScale: 1, sessionSize: 30, minimaxKey: '', openrouterKey: '' };
let s = { ...D };
function load() {
try { s = { ...D, ...MoSettings.all() }; } catch (e) { s = { ...D }; }
}
function get(k) { return s[k]; }
function set(k, v) { s[k] = v; MoSettings.set(k, v); }
return { load, get, set };
})();
/* ──────────────────────────────────────────────
APP STATE — single source of truth
────────────────────────────────────────────── */
const State = {
dictionary: [],
current: null,
mode: 'zh-es',
isFlipped: false,
session: { correct: 0, wrong: 0, total: 0, streak: 0, bestStreak: 0, count: 0 },
};
/* ── js/srs.js ── */
/* ──────────────────────────────────────────────
SRS MODULE
────────────────────────────────────────────── */
const SRS = (() => {
let db = {};
async function load() {
try {
const all = await MoDB.getAllSRS();
db = {};
all.forEach(item => { const id = item.id; delete item.id; db[id] = item; });
} catch (e) { db = {}; }
}
async function save() {
for (const [id, obj] of Object.entries(db)) {
await MoDB.putSRS({ id, ...obj });
}
}
function get(w) { if (!db[w]) db[w] = { interval: 1, ease: 2.5, due: 0, reps: 0, lapses: 0, hidden: false }; return db[w]; }
async function update(w, r) {
const d = get(w); d.reps++;
if (r === 0) { d.lapses++; d.interval = 1; d.ease = Math.max(1.3, d.ease - .2); }
else if (r === 1) { d.interval = Math.max(1, Math.round(d.interval * 1.2)); }
else { d.interval = Math.round(d.interval * d.ease); d.ease = Math.min(3, d.ease + .1); }
d.due = Date.now() + d.interval * 3600 * 1000;
await MoDB.putSRS({ id: w, ...d });
}
async function hide(w) { get(w).hidden = true; await MoDB.putSRS({ id: w, ...get(w) }); }
function score(w) {
const d = db[w];
if (!d) return 0;
if (d.interval < 2) return 0;
if (d.interval < 8) return 1;
if (d.interval < 20) return 2;
if (d.interval < 50) return 3;
if (d.interval < 140) return 4;
return 5;
}
function isHidden(w) { return !!(db[w] && db[w].hidden); }
function pick(words) {
const visible = words.filter(w => !isHidden(w[0]));
const pool = visible.length > 0 ? visible : words;
const now = Date.now();
const newCards = [];
const dueCards = [];
const notDueCards = [];
for (const w of pool) {
const d = db[w[0]];
if (!d) newCards.push(w);
else if (d.due <= now) dueCards.push(w);
else notDueCards.push(w);
}
let bucket;
if (dueCards.length > 0 && newCards.length > 0) {
bucket = Math.random() < 0.70 ? dueCards : newCards;
} else if (dueCards.length > 0) {
bucket = dueCards;
} else if (newCards.length > 0) {
bucket = newCards;
} else {
bucket = notDueCards;
}
return bucket[Math.floor(Math.random() * bucket.length)];
}
function exportAll() {
return JSON.stringify(db, null, 2);
}
async function importAll(raw) {
try {
const incoming = JSON.parse(raw);
Object.assign(db, incoming);
for (const [id, obj] of Object.entries(incoming)) {
await MoDB.putSRS({ id, ...obj });
}
return Object.keys(incoming).length;
} catch (e) { return 0; }
}
return { load, save, get, update, hide, score, isHidden, pick, exportAll, importAll };
})();
/* ── js/audioDb.js ── */
/* ──────────────────────────────────────────────
INDEXEDDB AUDIO STORAGE
Stores raw ArrayBuffer for MP3 audio
────────────────────────────────────────────── */
const AudioDB = (() => {
async function saveWordAudio(hanzi, arrayBuffer) {
const existing = await MoDB.getAudio(hanzi);
await MoDB.putAudio({
id: hanzi,
wordAudio: arrayBuffer,
sentenceAudios: existing ? existing.sentenceAudios : [],
source: 'minimax'
});
}
async function loadWordAudio(hanzi) {
const a = await MoDB.getAudio(hanzi);
return a && a.wordAudio ? a.wordAudio : null;
}
async function saveSentenceAudio(hanzi, index, arrayBuffer) {
const a = (await MoDB.getAudio(hanzi)) || { id: hanzi, sentenceAudios: [] };
a.sentenceAudios = a.sentenceAudios || [];
a.sentenceAudios = a.sentenceAudios.filter(sa => sa.index !== index);
a.sentenceAudios.push({ index, audio: arrayBuffer });
await MoDB.putAudio(a);
}
async function loadSentenceAudio(hanzi, index) {
const a = await MoDB.getAudio(hanzi);
if (!a || !a.sentenceAudios) return null;
const found = a.sentenceAudios.find(sa => sa.index === index);
return found ? found.audio : null;
}
async function exportAll() {
const all = await MoDB.getAll(MoDB.S.AUDIO);
const result = { word: {}, sentence: {} };
for (const a of all) {
if (a.wordAudio) result.word[a.id] = MoDB.bufferToBase64(a.wordAudio);
for (const sa of (a.sentenceAudios || [])) {
result.sentence[`${a.id}:${sa.index}`] = MoDB.bufferToBase64(sa.audio);
}
}
return result;
}
async function importAll(data) {
if (!data) return 0;
let count = 0;
if (data.word) {
for (const [hanzi, b64] of Object.entries(data.word)) {
try {
const existing = await MoDB.getAudio(hanzi);
await MoDB.putAudio({
id: hanzi,
wordAudio: MoDB.base64ToBuffer(b64),
sentenceAudios: existing ? existing.sentenceAudios : [],
source: 'import'
});
count++;
} catch (e) {
console.warn(`Failed importing word audio for ${hanzi}`);
}
}
}
if (data.sentence) {
for (const [key, b64] of Object.entries(data.sentence)) {
const [hanzi, indexStr] = key.split(':');
const index = parseInt(indexStr, 10);
try {
const existing = (await MoDB.getAudio(hanzi)) || { id: hanzi, sentenceAudios: [] };
existing.sentenceAudios = existing.sentenceAudios.filter(sa => sa.index !== index);
existing.sentenceAudios.push({ index, audio: MoDB.base64ToBuffer(b64) });
await MoDB.putAudio(existing);
count++;
} catch (e) {
console.warn(`Failed importing sentence audio for ${key}`);
}
}
}
return count;
}
async function cacheCount() {
const all = await MoDB.getAll(MoDB.S.AUDIO);
let count = 0;
for (const a of all) {
if (a.wordAudio) count++;
count += (a.sentenceAudios || []).length;
}
return count;
}
return {
saveWordAudio,
loadWordAudio,
saveSentenceAudio,
loadSentenceAudio,
exportAll,
importAll,
cacheCount
};
})();
/* ── js/audio.js ── */
/* ──────────────────────────────────────────────
AUDIO MODULE
────────────────────────────────────────────── */
const Audio = (() => {
const MINIMAX_URL = 'https://api.minimax.io/v1/t2a_v2';
let _currentAudio = null;
function hexToBuffer(hex) {
const bytes = new Uint8Array(hex.length / 2);
for (let i = 0; i < bytes.length; i++) bytes[i] = parseInt(hex.substr(i * 2, 2), 16);
return bytes.buffer;
}
function playBuffer(buf) {
if (_currentAudio) { _currentAudio.pause(); URL.revokeObjectURL(_currentAudio.src); }
const blob = new Blob([buf], { type: 'audio/mpeg' });
const url = URL.createObjectURL(blob);
_currentAudio = new window.Audio(url);
_currentAudio.onended = () => { URL.revokeObjectURL(url); setBtn('idle'); };
_currentAudio.onerror = () => { setBtn('idle'); };
_currentAudio.play().catch(() => setBtn('idle'));
setBtn('playing');
}
function speakFallback(text) {
if (!window.speechSynthesis) return;
const u = new SpeechSynthesisUtterance(text);
u.lang = 'zh-CN'; u.rate = 0.85;
const voices = speechSynthesis.getVoices();
const zh = voices.find(v => v.lang.startsWith('zh') && v.localService === false)
|| voices.find(v => v.lang.startsWith('zh'));
if (zh) u.voice = zh;
u.onend = () => setBtn('idle');
u.onerror = () => setBtn('idle');
speechSynthesis.cancel();
speechSynthesis.speak(u);
setBtn('playing');
}
const SVG_IDLE = `<svg viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg" width="14" height="14">
<polygon points="4,3 16,10 4,17" fill="currentColor"/>
</svg>`;
const SVG_PLAYING = `<svg viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg" width="14" height="14">
<rect x="3" y="3" width="5" height="14" rx="1.5" fill="currentColor"/>
<rect x="12" y="3" width="5" height="14" rx="1.5" fill="currentColor"/>
</svg>`;
const SVG_LOADING = `<svg viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg" width="14" height="14">
<circle cx="10" cy="10" r="7" stroke="currentColor" stroke-width="2" stroke-dasharray="28 16" stroke-linecap="round"/>
</svg>`;
function setBtn(state) {
const btn = document.getElementById('audio-btn');
if (!btn) return;
btn.classList.remove('loading', 'playing');
if (state === 'loading') { btn.classList.add('loading'); btn.innerHTML = SVG_LOADING; }
else if (state === 'playing') { btn.classList.add('playing'); btn.innerHTML = SVG_PLAYING; }
else { btn.innerHTML = SVG_IDLE; }
}
async function fetchMinimax(hanzi, apiKey) {
const body = {
model: 'speech-2.8-hd',
text: hanzi,
voice_setting: { voice_id: 'moss_audio_e4ec37c8-eb33-11f0-aedc-f24cdda4c95e', speed: 0.85, vol: 1.3, pitch: 0 },
audio_setting: { format: 'mp3', sample_rate: 32000, bitrate: 128000, channel: 1 }
};
let res;
try {
res = await fetch(MINIMAX_URL, {
method: 'POST',
headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + apiKey },
body: JSON.stringify(body)
});
} catch (netErr) {
throw new Error('Network error (CORS or connectivity): ' + netErr.message);
}
if (!res.ok) throw new Error('Minimax HTTP ' + res.status + ' ' + res.statusText);
const json = await res.json();
const code = json?.base_resp?.status_code ?? json?.status_code;
if (code !== undefined && code !== 0) throw new Error('Minimax API error ' + code);
const hex = json?.data?.audio;
if (!hex || hex.length < 10) throw new Error('Minimax returned empty audio (hex missing)');
return hexToBuffer(hex);
}
async function play(hanzi) {
if (!hanzi) return;
setBtn('loading');
// 1. Check DB Cache
const cachedBuf = await AudioDB.loadWordAudio(hanzi);
if (cachedBuf) {
playBuffer(cachedBuf);
return;
}
// 2. Try Minimax
const apiKey = Settings.get('minimaxKey');
if (apiKey) {
try {
const buf = await fetchMinimax(hanzi, apiKey);
await AudioDB.saveWordAudio(hanzi, buf);
playBuffer(buf);
return;
} catch (err) {
console.warn('Minimax TTS failed:', err.message, '. Falling back to Web Speech.');
}
}
// 3. Fallback
speakFallback(hanzi);
}
function initBtn() { setBtn('idle'); }
async function exportCache() {
return AudioDB.exportAll();
}
async function importCache(data) {
return AudioDB.importAll(data);
}
async function cacheCount() {
return AudioDB.cacheCount();
}
// Export fetchMinimax securely so Sentences panel can re-use it
return { play, initBtn, exportCache, importCache, cacheCount, fetchMinimax };
})();
/* ── js/sentences.js ── */
/* ──────────────────────────────────────────────
SENTENCES MODULE
────────────────────────────────────────────── */
const Sentences = (() => {
const API_URL = 'https://openrouter.ai/api/v1/chat/completions';
async function loadCached(hanzi) {
try {
const list = await MoDB.getSentencesByWord(hanzi);
return list.length > 0 ? { zh: list[0].zh, es: list[0].es } : null;
} catch (e) {
return null;
}
}
async function saveCache(hanzi, sentence) {
try {
await MoDB.putSentence({ wordId: hanzi, zh: sentence.zh, es: sentence.es });
} catch (e) {}
}
async function generate(hanzi, translation, apiKey) {
if (!apiKey) return null;
const prompt = `Generate one example sentence in Chinese using the word "${hanzi}" (meaning: "${translation}").
The sentence must be natural, moderately complex, and show clear usage of the word in context.
Respond ONLY with a JSON object, no markdown formatting:
{
"zh": "Chinese sentence using the word",
"es": "Spanish translation"
}`;
const body = {
model: 'qwen/qwen3-235b-a22b-2507',
response_format: { type: "json_object" },
temperature: 0.7,
max_tokens: 300,
messages: [{ role: 'user', content: prompt }]
};
try {
const res = await fetch(API_URL, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': `Bearer ${apiKey}`,
'HTTP-Referer': 'mo-chinese-study'
},
body: JSON.stringify(body)
});
if (!res.ok) {
const errorText = await res.text();
console.error('OpenRouter returned an error:', errorText);
throw new Error(`API request failed with status ${res.status}: ${errorText}`);
}
const data = await res.json();
const content = data.choices[0].message.content;
const cleanContent = content.replace(/```json\n?/i, '').replace(/```/i, '').trim();
return JSON.parse(cleanContent);
} catch (e) {
console.error('Sentence generation failed:', e);
return null;
}
}
async function getOrGenerate(hanzi, translation, apiKey) {
let s = await loadCached(hanzi);
if (s) return s;
if (!apiKey) return null;
s = await generate(hanzi, translation, apiKey);
if (s) await saveCache(hanzi, s);
return s;
}
async function exportAll() {
const all = await MoDB.getAll(MoDB.S.SENTENCES);
const out = {};
for (const s of all) {
out[s.wordId] = { zh: s.zh, es: s.es };
}
return out;
}
async function importAll(data) {
if(!data) return;
for(const [hanzi, sentence] of Object.entries(data)) {
await saveCache(hanzi, sentence);
}
}
return { loadCached, saveCache, generate, getOrGenerate, exportAll, importAll };
})();
/* ── js/visuals/inkBg.js ── */
/* ──────────────────────────────────────────────
INK BACKGROUND
────────────────────────────────────────────── */
const InkBG = (() => {
const cv = document.getElementById('ink-canvas');
if (!cv) return { setHue() {} }; // safety when included before DOM
const ctx = cv.getContext('2d');
let W, H, t = 0, hue = 220, targetHue = 220;
function resize() { cv.width = W = innerWidth; cv.height = H = innerHeight; }
resize(); window.addEventListener('resize', resize);
function noise(x, y, t) { return Math.sin(x * .003 + t * .4) * Math.cos(y * .002 + t * .3) * Math.sin((x + y) * .001 + t * .2); }
const B = [{ ox: .2, oy: .2, r: .35, sp: 1 }, { ox: .8, oy: .7, r: .4, sp: .7 }, { ox: .5, oy: .5, r: .3, sp: 1.3 }, { ox: .1, oy: .8, r: .25, sp: .9 }, { ox: .9, oy: .2, r: .28, sp: 1.1 }];
function draw() {
ctx.clearRect(0, 0, W, H);
hue += (targetHue - hue) * .005;
const light = document.body.classList.contains('light');
if (light) {
ctx.fillStyle = '#f5f0e8'; ctx.fillRect(0, 0, W, H);
for (let i = 0; i < 3; i++) { const x = (Math.sin(t * .1 + i * 2.1) * .5 + .5) * W, y = (Math.cos(t * .08 + i * 1.7) * .5 + .5) * H, g = ctx.createRadialGradient(x, y, 0, x, y, 220 + i * 70); g.addColorStop(0, 'rgba(180,140,80,.05)'); g.addColorStop(1, 'rgba(180,140,80,0)'); ctx.fillStyle = g; ctx.fillRect(0, 0, W, H); }
} else {
ctx.fillStyle = '#080a0e'; ctx.fillRect(0, 0, W, H);
B.forEach((b, i) => { const px = noise(i * 100, 0, t * b.sp) * .15, py = noise(0, i * 100, t * b.sp * .8) * .15, x = (b.ox + px) * W, y = (b.oy + py) * H, r = b.r * Math.min(W, H), h = ((hue + i * 22 + noise(i * 50, i * 30, t * .2) * 30) % 360 + 360) % 360, g = ctx.createRadialGradient(x, y, 0, x, y, r); g.addColorStop(0, `hsla(${h},40%,12%,.5)`); g.addColorStop(.5, `hsla(${h},30%,8%,.25)`); g.addColorStop(1, `hsla(${h},20%,5%,0)`); ctx.fillStyle = g; ctx.fillRect(0, 0, W, H); });
const rx = W * .5 + Math.sin(t * .3) * W * .1, ry = H * .4 + Math.cos(t * .25) * H * .1, rg = ctx.createRadialGradient(rx, ry, 0, rx, ry, W * .3); rg.addColorStop(0, 'rgba(180,40,30,.06)'); rg.addColorStop(1, 'rgba(180,40,30,0)'); ctx.fillStyle = rg; ctx.fillRect(0, 0, W, H);
}
t += .008; requestAnimationFrame(draw);
}
// We'll init this inside app.js when DOM is ready, or rely on defer/module behavior.
draw();
return { setHue(h) { targetHue = h; } };
})();
/* ── js/visuals/particles.js ── */
/* ──────────────────────────────────────────────
PARTICLE SYSTEM
────────────────────────────────────────────── */
const Particles = (() => {
const cv = document.getElementById('particle-canvas');
if (!cv) return { burst() {} };
const ctx = cv.getContext('2d');
let W, H, pool = [];
function resize() { cv.width = W = innerWidth; cv.height = H = innerHeight; }
resize(); window.addEventListener('resize', resize);
class P {
constructor(x, y, type) {
this.x = x; this.y = y; this.type = type; this.life = 1;
const a = Math.random() * Math.PI * 2, sp = 1 + Math.random() * (type === 'ink' ? 6 : type === 'gold' ? 4 : 3);
this.vx = Math.cos(a) * sp; this.vy = Math.sin(a) * sp - (type === 'gold' ? 2 : 0);
this.sz = type === 'ink' ? 3 + Math.random() * 8 : type === 'gold' ? 2 + Math.random() * 5 : 2 + Math.random() * 4;
this.decay = .018 + Math.random() * .015;
this.grav = type === 'ink' ? .12 : type === 'gold' ? -.05 : .06;
this.rot = Math.random() * Math.PI * 2; this.rotSp = (Math.random() - .5) * .15;
}
update() { this.x += this.vx; this.y += this.vy; this.vy += this.grav; this.vx *= .96; this.life -= this.decay; this.sz *= .97; this.rot += this.rotSp; }
draw(c) {
if (this.life <= 0) return;
c.save(); c.globalAlpha = Math.max(0, this.life) * .9; c.translate(this.x, this.y); c.rotate(this.rot);
if (this.type === 'ink') { c.fillStyle = `rgba(20,10,10,${this.life})`; c.beginPath(); c.ellipse(0, 0, this.sz, this.sz * .6, 0, 0, Math.PI * 2); c.fill(); }
else if (this.type === 'gold') { const g = c.createRadialGradient(0, 0, 0, 0, 0, this.sz); g.addColorStop(0, `rgba(255,210,80,${this.life})`); g.addColorStop(1, 'rgba(200,150,30,0)'); c.fillStyle = g; c.beginPath(); c.arc(0, 0, this.sz, 0, Math.PI * 2); c.fill(); }
else if (this.type === 'smoke') { c.fillStyle = `rgba(40,30,30,${this.life * .6})`; c.beginPath(); c.arc(0, 0, this.sz, 0, Math.PI * 2); c.fill(); }
else { c.strokeStyle = `rgba(200,57,43,${this.life})`; c.lineWidth = 1.5; c.beginPath(); c.moveTo(0, 0); c.lineTo(this.vx * 3, this.vy * 3); c.stroke(); }
c.restore();
}
}