:root {
  --bg: #f6f7fb;
  --panel: rgba(255,255,255,.88);
  --panel-solid: #fff;
  --text: #1f2233;
  --muted: #74798f;
  --line: #e7e9f1;
  --accent: #6d5ce7;
  --accent-dark: #5140c5;
  --accent-soft: #eeeafd;
  --green: #2eaf83;
  --orange: #ef9859;
  --blue: #4d8fe8;
  --shadow: 0 18px 50px rgba(42, 39, 84, .09);
  --radius: 24px;
}
[data-theme="dark"] {
  --bg: #11131b;
  --panel: rgba(27,29,42,.9);
  --panel-solid: #1b1d2a;
  --text: #f6f7fb;
  --muted: #9ca2b7;
  --line: #303345;
  --accent: #9a8cff;
  --accent-dark: #8373f5;
  --accent-soft: #292546;
  --shadow: 0 18px 50px rgba(0,0,0,.28);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Manrope, system-ui, sans-serif; color: var(--text); background: var(--bg); min-height: 100vh; overflow-x: hidden; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
.ambient { position: fixed; width: 440px; height: 440px; border-radius: 50%; filter: blur(85px); opacity: .18; z-index: -1; pointer-events: none; }
.ambient-a { background: #8e79ff; top: -220px; right: -130px; }
.ambient-b { background: #77d4bb; left: 20%; bottom: -320px; }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 250px minmax(0,1fr); }
.sidebar { height: 100vh; position: sticky; top: 0; padding: 28px 22px; background: color-mix(in srgb, var(--panel-solid) 86%, transparent); backdrop-filter: blur(18px); border-right: 1px solid var(--line); display: flex; flex-direction: column; z-index: 20; }
.brand { display: flex; gap: 12px; align-items: center; text-decoration: none; color: inherit; padding: 0 7px; }
.brand-mark { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 15px; color: #fff; background: linear-gradient(135deg,var(--accent),#9c7cf0); font-family: Newsreader,serif; font-size: 19px; box-shadow: 0 10px 26px rgba(109,92,231,.28); }
.brand strong { display: block; font-size: 16px; }
.brand small { color: var(--muted); font-size: 11px; }
.nav-list { display: grid; gap: 7px; margin-top: 38px; }
.nav-item { border: 0; background: transparent; text-align: left; padding: 13px 15px; border-radius: 14px; color: var(--muted); cursor: pointer; font-weight: 600; transition: .2s; }
.nav-item span { display: inline-grid; place-items: center; width: 24px; margin-right: 7px; font-size: 18px; }
.nav-item:hover { background: var(--accent-soft); color: var(--text); }
.nav-item.active { color: var(--accent); background: var(--accent-soft); }
.sidebar-card { margin-top: auto; padding: 17px; border-radius: 18px; background: var(--accent-soft); }
.sidebar-card-top { display: flex; justify-content: space-between; font-size: 12px; }
.sidebar-card p { color: var(--muted); font-size: 11px; line-height: 1.5; margin: 11px 0 0; }
.progress-track { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; }
.progress-track span { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg,var(--accent),#a875ec); transition: width .45s ease; }
.sidebar-card .progress-track { margin-top: 10px; background: color-mix(in srgb, var(--accent) 18%, transparent); }
.sidebar-footer { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 11px; margin-top: 15px; padding: 0 5px; }
.icon-button, .menu-button, .card-icon-button, .sound-button { border: 1px solid var(--line); background: var(--panel-solid); cursor: pointer; display: grid; place-items: center; }
.icon-button { width: 33px; height: 33px; border-radius: 10px; }
.main { min-width: 0; }
.topbar { height: 84px; padding: 18px clamp(24px,4vw,52px); display: flex; align-items: center; gap: 18px; position: sticky; top: 0; z-index: 15; background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: blur(18px); }
.menu-button { display: none; width: 42px; height: 42px; border-radius: 12px; }
.top-search { max-width: 520px; flex: 1; display: flex; align-items: center; gap: 10px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel-solid); color: var(--muted); }
.top-search input { border: 0; outline: 0; background: transparent; min-width: 0; flex: 1; color: var(--text); }
kbd { border: 1px solid var(--line); border-bottom-width: 2px; background: var(--panel-solid); padding: 2px 6px; border-radius: 6px; color: var(--muted); font-size: 11px; }
.top-actions { margin-left: auto; display: flex; gap: 12px; align-items: center; }
.streak-pill { padding: 10px 13px; border: 1px solid var(--line); border-radius: 14px; font-size: 12px; background: var(--panel-solid); }
.streak-pill span { color: var(--orange); }
.avatar { width: 42px; height: 42px; border: 0; border-radius: 14px; color: #fff; background: linear-gradient(135deg,#273149,#5c6d8d); font-weight: 800; }
.view { display: none; padding: 14px clamp(24px,4vw,52px) 60px; animation: viewIn .35s ease; }
.view.active { display: block; }
@keyframes viewIn { from { opacity: 0; transform: translateY(8px); } }
.panel { border: 1px solid color-mix(in srgb,var(--line) 82%,transparent); background: var(--panel); backdrop-filter: blur(12px); box-shadow: var(--shadow); border-radius: var(--radius); }
.hero { min-height: 355px; display: grid; grid-template-columns: 1.1fr .9fr; overflow: hidden; position: relative; background: linear-gradient(135deg,color-mix(in srgb,var(--panel-solid) 94%,#efeafd),color-mix(in srgb,var(--panel-solid) 88%,#e9faf5)); }
.hero-copy { padding: clamp(32px,5vw,64px); align-self: center; max-width: 650px; }
.eyebrow { color: var(--accent); font-size: 10px; letter-spacing: .16em; font-weight: 800; }
h1,h2,h3,p { margin-top: 0; }
h1 { font-family: Newsreader,serif; font-size: clamp(40px,4.7vw,66px); line-height: .98; letter-spacing: -.035em; margin: 14px 0 18px; }
h1 em { color: var(--accent); font-style: italic; }
.hero-copy p { max-width: 550px; color: var(--muted); line-height: 1.7; font-size: 15px; }
.hero-actions { display: flex; gap: 10px; margin-top: 25px; flex-wrap: wrap; }
.primary-button,.secondary-button { border: 0; border-radius: 13px; padding: 12px 18px; cursor: pointer; font-weight: 700; transition: .2s; }
.primary-button { background: var(--accent); color: white; box-shadow: 0 10px 26px color-mix(in srgb,var(--accent) 30%,transparent); }
.primary-button:hover { background: var(--accent-dark); transform: translateY(-1px); }
.secondary-button { background: var(--panel-solid); border: 1px solid var(--line); }
.secondary-button:hover { border-color: var(--accent); color: var(--accent); }
.small { padding: 9px 13px; font-size: 12px; }.full { width: 100%; }
.hero-visual { position: relative; min-height: 320px; display: grid; place-items: center; }
.hero-core { width: 126px; height: 126px; border-radius: 38px; display: grid; place-items: center; font-family: Newsreader,serif; font-size: 52px; color: #fff; background: linear-gradient(145deg,var(--accent),#56bea7); box-shadow: 0 30px 55px rgba(89,87,190,.28); animation: float 4s ease-in-out infinite; }
.orbit { position: absolute; border: 1px dashed color-mix(in srgb,var(--accent) 35%,transparent); border-radius: 50%; }
.orbit-one { width: 310px; height: 310px; animation: spin 22s linear infinite; }.orbit-two { width: 230px; height: 230px; animation: spin 15s linear reverse infinite; }
.floating-card { position: absolute; padding: 13px 15px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel-solid); box-shadow: var(--shadow); min-width: 145px; animation: float 5s ease-in-out infinite; }
.floating-card span { display: block; font-family: Newsreader,serif; font-size: 17px; }.floating-card small { color: var(--muted); font-size: 10px; }
.card-one { top: 15%; right: 9%; }.card-two { bottom: 13%; right: 18%; animation-delay: -1.5s; }.card-three { left: 5%; top: 46%; animation-delay: -2.4s; }
@keyframes float { 50% { transform: translateY(-9px); } } @keyframes spin { to { transform: rotate(360deg); } }
.metrics-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 15px; margin: 18px 0; }
.metric-card { display: flex; gap: 14px; align-items: center; padding: 18px; border: 1px solid var(--line); border-radius: 19px; background: var(--panel); }
.metric-icon { width: 43px; height: 43px; display: grid; place-items: center; border-radius: 13px; font-size: 20px; }.purple{background:var(--accent-soft);color:var(--accent)}.green{background:#e5f7f0;color:var(--green)}.orange{background:#fff0e4;color:var(--orange)}.blue{background:#e7f0fd;color:var(--blue)}
.metric-card small,.metric-card em { display: block; color: var(--muted); font-size: 10px; font-style: normal; }.metric-card strong { display: block; font-size: 24px; line-height: 1.2; }
.dashboard-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 18px; }
.daily-panel,.progress-panel,.sets-panel { padding: 24px; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 18px; }.section-heading h2 { margin: 4px 0 0; font-size: 19px; }.text-button { border: 0; background: transparent; color: var(--accent); font-size: 12px; cursor: pointer; font-weight: 700; }
.daily-list { display: grid; gap: 8px; }
.daily-word { display: grid; grid-template-columns: 46px minmax(0,1fr) auto; align-items: center; gap: 12px; padding: 9px; border-radius: 14px; cursor: pointer; transition: .2s; }
.daily-word:hover { background: var(--accent-soft); transform: translateX(3px); }.daily-thumb { width: 46px; height: 46px; border-radius: 12px; overflow: hidden; background: var(--accent-soft); display: grid; place-items: center; font-family: Newsreader,serif; font-size: 22px; }.daily-thumb img { width:100%;height:100%;object-fit:cover; }.daily-word strong { display:block;font-size:13px; }.daily-word small { display:block;color:var(--muted);font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }.status-chip { padding: 5px 8px; border-radius: 9px; background: var(--accent-soft); color: var(--accent); font-size: 9px; font-weight: 800; text-transform: uppercase; }
.progress-ring-wrap { display:grid;place-items:center;padding:12px 0 20px; }.progress-ring { --p:0; width:170px;height:170px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--accent) calc(var(--p)*1%),var(--line) 0);position:relative; }.progress-ring:after { content:"";position:absolute;inset:15px;border-radius:50%;background:var(--panel-solid); }.progress-ring div { z-index:1;text-align:center; }.progress-ring strong {display:block;font-size:32px}.progress-ring span{color:var(--muted);font-size:11px}.legend{display:grid;gap:10px;font-size:11px}.legend span{display:flex;align-items:center;gap:8px}.legend strong{margin-left:auto}.legend i{width:9px;height:9px;border-radius:50%;}.legend-mastered{background:var(--accent)}.legend-learning{background:var(--orange)}.legend-new{background:var(--line)}
.sets-panel { margin-top: 18px; }.set-strip { display:grid;grid-template-columns:repeat(6,1fr);gap:10px; }.set-tile { border:1px solid var(--line);background:var(--panel-solid);border-radius:16px;padding:14px;cursor:pointer;text-align:left;transition:.2s; }.set-tile:hover{transform:translateY(-3px);border-color:var(--accent)}.set-tile strong{display:block;font-size:14px}.set-tile small{color:var(--muted);font-size:9px}.mini-progress{height:5px;background:var(--line);border-radius:99px;margin-top:11px;overflow:hidden}.mini-progress span{display:block;height:100%;background:var(--accent)}
.compact-panel { padding: 22px 25px; display:flex;justify-content:space-between;align-items:center;gap:20px; }.compact-panel h2{margin:4px 0 0;font-size:23px}.compact-panel p{margin:5px 0 0;color:var(--muted);font-size:12px}.study-controls,.browse-filters,.quiz-header-actions{display:flex;gap:10px;align-items:end;flex-wrap:wrap}.study-controls label,.browse-filters label,.quiz-header-actions label{display:grid;gap:5px;color:var(--muted);font-size:9px;text-transform:uppercase;font-weight:800;letter-spacing:.08em}select{color:var(--text);background:var(--panel-solid);border:1px solid var(--line);border-radius:10px;padding:8px 28px 8px 10px;outline:none;text-transform:none;letter-spacing:0;font-size:12px}
.study-layout{display:grid;grid-template-columns:minmax(0,820px) 230px;gap:18px;justify-content:center;margin-top:18px}.study-main{min-width:0}.session-progress{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;color:var(--muted);font-size:10px;margin:0 10px 12px}.flashcard-scene{height:550px;perspective:1500px;outline:none}.flashcard{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .65s cubic-bezier(.2,.75,.2,1);cursor:pointer}.flashcard.flipped{transform:rotateY(180deg)}.flash-face{position:absolute;inset:0;backface-visibility:hidden;border:1px solid var(--line);background:var(--panel-solid);border-radius:30px;box-shadow:var(--shadow);padding:27px;display:flex;flex-direction:column}.flash-back{transform:rotateY(180deg)}.card-topline{display:flex;justify-content:space-between;align-items:center}.set-badge{padding:6px 9px;border-radius:9px;background:var(--accent-soft);color:var(--accent);font-size:9px;font-weight:800;text-transform:uppercase}.card-icon-button{width:38px;height:38px;border-radius:12px;font-size:22px}.card-icon-button.saved{color:#f2aa3f}.image-frame{flex:1;min-height:0;margin:14px 0;border-radius:22px;overflow:hidden;background:linear-gradient(145deg,var(--accent-soft),color-mix(in srgb,var(--accent-soft) 45%,#dff5ee));display:grid;place-items:center}.image-frame img{width:100%;height:100%;object-fit:contain;padding:7px}.image-placeholder{font-family:Newsreader,serif;font-size:110px;color:var(--accent);opacity:.72}.word-block{display:flex;align-items:center;justify-content:center;gap:13px}.word-number{color:var(--muted);font-size:11px}.word-block h2,.back-word-row h2{font-family:Newsreader,serif;font-size:44px;margin:0;letter-spacing:-.02em}.sound-button{width:40px;height:40px;border-radius:13px;color:var(--accent)}.flip-hint{text-align:center;color:var(--muted);font-size:10px;margin:12px 0 0}.back-word-row{display:flex;justify-content:space-between;align-items:center;margin:24px 5px 10px}.definition{font-family:Newsreader,serif;font-size:clamp(23px,3vw,34px);line-height:1.25;margin:12px 5px 18px}.memory-cue{padding:17px;border-radius:16px;background:var(--accent-soft);margin:0 5px 16px}.memory-cue span{font-size:9px;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);font-weight:800}.memory-cue p{margin:5px 0 0;color:var(--muted);font-size:12px}.note-label{display:grid;gap:7px;color:var(--muted);font-size:10px;margin:0 5px}.note-label textarea{resize:none;color:var(--text);background:var(--panel-solid);border:1px solid var(--line);border-radius:12px;padding:10px;outline:none}.rating-block{text-align:center;margin-top:14px}.rating-block>p{color:var(--muted);font-size:11px;margin-bottom:9px}.rating-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.rating-buttons button{border:1px solid var(--line);background:var(--panel-solid);border-radius:13px;padding:10px;cursor:pointer;display:grid;grid-template-columns:auto 1fr;column-gap:6px;text-align:left}.rating-buttons button:hover{border-color:var(--accent);transform:translateY(-2px)}.rating-buttons strong{font-size:11px}.rating-buttons small{grid-column:2;color:var(--muted);font-size:8px}.study-side{padding:20px;height:max-content;position:sticky;top:104px}.study-side h3{font-size:15px;margin:5px 0 14px}.shortcut-list{display:grid;gap:13px;font-size:10px;color:var(--muted)}.shortcut-list span{display:flex;align-items:center;gap:7px}.study-side hr{border:0;border-top:1px solid var(--line);margin:20px 0}.study-side p{color:var(--muted);font-size:11px;line-height:1.6}
.quiz-card{max-width:850px;margin:18px auto 0;padding:28px}.quiz-top{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}.quiz-progress{margin:10px 0 22px}.quiz-prompt{display:grid;grid-template-columns:220px 1fr;gap:26px;align-items:center}.quiz-image{height:190px;border-radius:20px;overflow:hidden;background:var(--accent-soft);display:grid;place-items:center}.quiz-image img{width:100%;height:100%;object-fit:contain}.quiz-image .image-placeholder{font-size:76px}.quiz-prompt p{font-family:Newsreader,serif;font-size:27px;line-height:1.3;margin:8px 0}.quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:25px}.quiz-option{border:1px solid var(--line);background:var(--panel-solid);border-radius:14px;padding:15px;text-align:left;cursor:pointer;font-family:Newsreader,serif;font-size:18px;transition:.2s}.quiz-option:hover{border-color:var(--accent);transform:translateY(-2px)}.quiz-option.correct{border-color:var(--green);background:#e8f8f2;color:#187c5d}.quiz-option.wrong{border-color:#e47777;background:#fff0f0;color:#a94747}.quiz-option:disabled{cursor:default;transform:none}.quiz-feedback{min-height:38px;margin-top:15px;font-size:12px}.quiz-feedback.good{color:var(--green)}.quiz-feedback.bad{color:#d55d5d}.quiz-next{display:block;margin-left:auto}.hidden{display:none!important}
.browse-header{margin-bottom:18px}.word-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.word-tile{border:1px solid var(--line);background:var(--panel);border-radius:19px;overflow:hidden;cursor:pointer;transition:.22s;min-width:0}.word-tile:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--accent) 55%,var(--line))}.word-tile-image{height:150px;background:var(--accent-soft);display:grid;place-items:center;overflow:hidden}.word-tile-image img{width:100%;height:100%;object-fit:cover}.word-tile-image .image-placeholder{font-size:52px}.word-tile-body{padding:14px}.word-tile-top{display:flex;justify-content:space-between;gap:8px}.word-tile h3{font-family:Newsreader,serif;font-size:22px;margin:0}.word-tile p{color:var(--muted);font-size:10px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:8px 0 12px}.word-meta{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:8px;text-transform:uppercase;font-weight:800}.tile-star{border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:18px;padding:0}.tile-star.saved{color:#f2aa3f}.load-more{display:block;margin:20px auto}.empty-state{text-align:center;padding:70px 20px;color:var(--muted)}.empty-state span{font-size:48px}.empty-state h3{color:var(--text)}
.toast{position:fixed;right:24px;bottom:24px;padding:12px 16px;border-radius:13px;background:#242637;color:white;box-shadow:var(--shadow);font-size:11px;transform:translateY(20px);opacity:0;pointer-events:none;transition:.25s;z-index:60}.toast.show{transform:none;opacity:1}
@media(max-width:1100px){.metrics-grid{grid-template-columns:repeat(2,1fr)}.set-strip{grid-template-columns:repeat(3,1fr)}.word-grid{grid-template-columns:repeat(3,1fr)}.study-layout{grid-template-columns:1fr}.study-side{display:none}.hero{grid-template-columns:1fr}.hero-visual{display:none}}
@media(max-width:800px){.app-shell{display:block}.sidebar{position:fixed;left:0;top:0;width:250px;transform:translateX(-105%);transition:.25s;box-shadow:var(--shadow)}.sidebar.open{transform:none}.menu-button{display:grid}.topbar{padding:16px 18px}.view{padding:10px 18px 45px}.top-actions .streak-pill{display:none}.dashboard-grid{grid-template-columns:1fr}.word-grid{grid-template-columns:repeat(2,1fr)}.compact-panel{align-items:flex-start;flex-direction:column}.study-controls,.browse-filters{width:100%}.flashcard-scene{height:520px}.quiz-prompt{grid-template-columns:1fr}.quiz-image{height:170px}.quiz-options{grid-template-columns:1fr}}
@media(max-width:520px){.metrics-grid{grid-template-columns:1fr 1fr}.metric-card{padding:13px;gap:9px}.metric-icon{width:36px;height:36px}.metric-card strong{font-size:20px}.set-strip{grid-template-columns:repeat(2,1fr)}.word-grid{grid-template-columns:1fr}.hero-copy{padding:30px 23px}.hero{min-height:auto}.top-search kbd{display:none}.top-actions{display:none}.flashcard-scene{height:500px}.flash-face{padding:19px}.image-frame{margin:10px 0}.word-block h2,.back-word-row h2{font-size:34px}.definition{font-size:24px}.rating-buttons{grid-template-columns:repeat(2,1fr)}.quiz-card{padding:20px}.metrics-grid{gap:9px}}