:root{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",sans-serif;color-scheme:light dark;--bg:#f7f7fb;--surface:#fff;--ink:#242236;--muted:#767486;--line:#e9e8f0;--accent:#6953d8;--accent-soft:#efebff;--mint:#e6f4ed;--peach:#fff0df;--lavender:#eeebfb;--hero:#eae4ff;--hero-ink:#35265f;--danger:#ad3349;--good:#26745a;--shadow:0 8px 30px #28233f05}
@media(prefers-color-scheme:dark){:root{--bg:#14141f;--surface:#20202d;--ink:#f4f1ff;--muted:#aba8bc;--line:#343344;--accent:#b5a4ff;--accent-soft:#34304d;--mint:#243d35;--peach:#433327;--lavender:#36304e;--hero:#3b3159;--hero-ink:#f0e9ff;--danger:#ffadbb;--good:#96dfba;--shadow:none}}
:root[data-theme=light]{color-scheme:light;--bg:#f7f7fb;--surface:#fff;--ink:#242236;--muted:#767486;--line:#e9e8f0;--accent:#6953d8;--accent-soft:#efebff;--mint:#e6f4ed;--peach:#fff0df;--lavender:#eeebfb;--hero:#eae4ff;--hero-ink:#35265f;--danger:#ad3349;--good:#26745a;--shadow:0 8px 30px #28233f05}
:root[data-theme=dark]{color-scheme:dark;--bg:#14141f;--surface:#20202d;--ink:#f4f1ff;--muted:#aba8bc;--line:#343344;--accent:#b5a4ff;--accent-soft:#34304d;--mint:#243d35;--peach:#433327;--lavender:#36304e;--hero:#3b3159;--hero-ink:#f0e9ff;--danger:#ffadbb;--good:#96dfba;--shadow:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{cursor:pointer;color:inherit}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}button[hidden],[hidden]{display:none!important}svg{width:23px;height:23px;flex:none}h1,h2,h3,p{margin:0}h1{font-size:32px;line-height:1.14;letter-spacing:-1.1px;font-weight:720;text-wrap:balance}h2{font-size:20px;line-height:1.25;letter-spacing:-.45px;font-weight:650}h3{font-size:18px;line-height:1.3}p{overflow-wrap:anywhere}button{border:0}main,.app-header,.save-status,.error-panel{max-width:620px;margin-inline:auto}.app-header{display:flex;align-items:center;justify-content:space-between;padding:calc(18px + env(safe-area-inset-top)) max(22px,env(safe-area-inset-right)) 2px max(22px,env(safe-area-inset-left))}.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:750;letter-spacing:-.8px}.brand img{border-radius:10px}.preview-label{display:block;font-size:10px;font-weight:550;letter-spacing:.25px;color:var(--muted);line-height:1.1}.header-actions{display:flex;gap:8px}.icon-button{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:var(--surface);border:1px solid var(--line);font-size:26px}.save-status{font-size:11px;color:var(--muted);min-height:28px;padding:3px 23px 8px}main{padding:14px max(22px,env(safe-area-inset-right)) calc(120px + env(safe-area-inset-bottom)) max(22px,env(safe-area-inset-left))}.page-heading{margin:8px 0 25px}.page-heading h1{max-width:450px}.page-heading>.muted{margin-top:10px}.eyebrow{font-size:11px;letter-spacing:1.4px;text-transform:uppercase;font-weight:650;color:var(--muted);margin-bottom:10px}.muted,.caption,.translation{color:var(--muted)}.caption{font-size:12px;line-height:1.6}.footnote{text-align:center;font-size:13px;color:var(--muted);margin:20px auto;max-width:360px}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:13px 20px;border-radius:16px;background:var(--surface);font-weight:600;font-size:15px;border:1px solid var(--line)}.button.primary{background:#6851d5;color:#fff;border-color:#6851d5;box-shadow:0 5px 12px #6851d51a}.button.subtle{background:var(--accent-soft);color:var(--accent);border-color:transparent}.button.quiet{border:0;background:transparent;color:var(--accent);font-size:13px}.wide{width:100%}.hero{border-radius:28px;padding:24px;background:var(--hero);color:var(--hero-ink);margin-bottom:18px;overflow:hidden}.hero-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.pill{display:inline-flex;align-items:center;gap:6px;border-radius:30px;background:var(--accent-soft);padding:6px 10px;font-size:11px;font-weight:600;color:var(--accent);white-space:normal}.pill svg{width:14px;height:14px}.hero .pill{background:#ffffff64;color:var(--hero-ink)}.hero-flower{font-size:49px;line-height:1;color:#c89953}.hero h2{font-size:27px;max-width:320px;letter-spacing:-.9px}.hero>p{font-size:14px;margin:12px 0 21px;max-width:330px;opacity:.8}.duo{display:grid;grid-template-columns:1fr 1fr;gap:13px}.metric-tile{padding:20px;border-radius:23px;display:flex;flex-direction:column;align-items:flex-start;min-height:142px}.mint{background:var(--mint)}.peach{background:var(--peach)}.lavender{background:var(--lavender)}.metric-tile strong{font-size:31px;line-height:1.2;letter-spacing:-.8px;font-weight:680}.metric-tile>span:last-child{font-size:12px;line-height:1.45;max-width:120px;margin-top:7px}.metric-icon svg{height:21px;width:21px;margin-bottom:10px;opacity:.75}.panel{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:22px;margin:17px 0;box-shadow:var(--shadow)}.panel>h2{margin-bottom:15px}.rhythm{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}.rhythm h2{font-size:17px}.rhythm .muted{font-size:12px;margin-top:5px}.rhythm .caption{grid-column:1/-1}.dots{display:flex;gap:5px}.dots span{width:9px;height:9px;border-radius:50%;background:var(--line)}.dots span.filled{background:var(--accent)}.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:24px 0 13px}.section-title h2{font-size:18px}.section-title>span{font-size:11px;color:var(--muted)}.panel .section-title{margin:0 0 16px}.practice-tile{display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between;gap:12px;text-align:left;min-height:115px;padding:18px;border-radius:22px;background:var(--surface);border:1px solid var(--line);font-size:14px;font-weight:600}.practice-tile svg{color:var(--accent)}.study-card{padding:25px 22px;background:var(--surface);border:1px solid var(--line);border-radius:29px;box-shadow:var(--shadow)}.card-top{display:flex;align-items:center;justify-content:space-between}.word-face{text-align:center;padding:47px 5px 34px}.word-face h2{font-size:47px;letter-spacing:-1.6px;line-height:1.1;font-weight:700;overflow-wrap:anywhere}.word-face>p{font-size:20px;color:var(--muted);margin-top:14px}.word-face.compact{padding:28px 0}.word-face.compact h2{font-size:37px}.word-face.compact>p{font-size:17px}.example{background:var(--bg);border-radius:18px;padding:18px;margin:14px 0 22px}.example .eyebrow{font-size:10px;margin-bottom:8px}.example>p{font-size:16px}.example .translation{font-size:13px;margin-top:5px}.question{font-size:28px;line-height:1.3;letter-spacing:-.8px;margin:32px 0}.field-label{display:block;font-size:12px;font-weight:600;margin:14px 0 9px}.answer-input,.own-editor{width:100%;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:17px;font-size:20px;padding:17px 16px;min-height:62px;appearance:none}.answer-input:focus,.own-editor:focus{border-color:var(--accent);outline:2px solid var(--accent-soft)}.answer-input::placeholder,.own-editor::placeholder{color:var(--muted);font-size:16px}.own-editor{font-size:17px;line-height:1.6;min-height:190px;resize:vertical}.study-card #study-actions{display:grid;gap:10px;margin-top:22px}.secondary-actions{display:flex;justify-content:space-between;flex-wrap:wrap;margin-top:10px}.feedback-tag{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:600}.feedback-tag.correct{color:var(--good)}.feedback-tag.incorrect{color:var(--danger)}.feedback-tag.pending{color:var(--muted)}.response-echo{font-size:12px;color:var(--muted);margin-top:17px}.feedback-copy{font-size:14px;line-height:1.6}.ratings{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin-top:25px}.rating{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:65px;border:1px solid var(--line);background:var(--bg);border-radius:16px;font-size:14px;font-weight:600}.rating small{font-size:10px;color:var(--muted);font-weight:400;margin-top:3px}.rating.featured{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.correction,.secondary-info{font-size:13px;color:var(--muted);margin-top:22px}.correction summary,.secondary-info summary{min-height:44px;display:list-item;padding-top:10px;cursor:pointer}.correction textarea{width:100%;min-height:90px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);padding:12px;font-size:16px;margin:10px 0}.choices{border:0;padding:0;margin:20px 0}.choices legend{font-size:12px;color:var(--muted);margin-bottom:12px}.choices label{display:flex;align-items:center;gap:12px;min-height:59px;padding:15px;border:1px solid var(--line);border-radius:16px;margin:10px 0;cursor:pointer}.choices label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}.choices input{width:20px;height:20px;accent-color:var(--accent)}.own-quote{font-size:23px;line-height:1.5;margin:20px 0}.completed{text-align:center;padding:40px 22px}.completed h2{margin:20px 0 10px}.round-icon{display:flex;justify-content:center;align-items:center;width:62px;height:62px;border-radius:50%;background:var(--accent-soft);color:var(--accent);margin:0 auto}.round-icon.success{background:var(--mint);color:var(--good)}.round-icon svg{width:30px;height:30px}.search-field{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);padding:12px 16px;border-radius:17px}.search-field svg{color:var(--muted);width:20px}.search-field input{width:100%;border:0;background:none;color:var(--ink);font-size:16px;min-height:28px;outline:none}.category-scroll{display:flex;gap:8px;overflow:auto;scrollbar-width:none;padding:17px 0}.chip{flex:none;min-height:39px;border-radius:22px;padding:8px 16px;border:1px solid var(--line);background:var(--surface);font-size:12px;white-space:nowrap}.chip.active{background:var(--ink);color:var(--surface);border-color:var(--ink)}.word-list{background:var(--surface);border:1px solid var(--line);border-radius:23px;overflow:hidden;margin-top:12px}.word-row{width:100%;display:flex;align-items:center;gap:13px;background:none;padding:16px;text-align:left;border-bottom:1px solid var(--line);min-height:82px}.word-row:last-child{border-bottom:0}.word-letter{width:43px;height:46px;flex:none;border-radius:14px;background:var(--lavender);color:var(--accent);display:grid;place-items:center;font-size:22px;font-weight:650}.word-letter.learning{background:var(--peach);color:var(--hero-ink)}.word-letter.consolidated{background:var(--mint);color:var(--good)}.word-row-copy{display:flex;flex:1;min-width:0;flex-direction:column;gap:3px}.word-row-copy strong{font-size:17px;font-weight:620}.word-row-copy>span{font-size:12px;color:var(--muted)}.word-row-end{display:flex;align-items:center;gap:9px}.word-row-end svg{color:var(--muted);width:16px}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--line)}.status-dot.learning{background:#d9984c}.status-dot.consolidated{background:var(--good)}.detail-stats{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:22px 0}.detail-stats>div{display:flex;flex-direction:column;gap:5px}.detail-stats strong{font-size:17px}.detail-stats span{font-size:11px;color:var(--muted)}#word-actions{display:grid;gap:8px}.progress-hero{text-align:center;padding:25px}.progress-ring{position:relative;width:164px;height:164px;margin:0 auto 16px;display:grid;place-items:center}.progress-ring>svg{position:absolute;width:100%;height:100%;inset:0;transform:rotate(-90deg)}.ring-bg{fill:none;stroke:var(--accent-soft);stroke-width:9}.ring-fill{fill:none;stroke:var(--accent);stroke-width:9;stroke-linecap:round}.progress-ring>span{display:flex;align-items:center;flex-direction:column;max-width:100px}.progress-ring strong{font-size:43px;letter-spacing:-1px;line-height:1.2}.progress-ring small{font-size:11px;line-height:1.3;color:var(--muted)}.simple-row{display:flex;align-items:center;justify-content:space-between;gap:13px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}.simple-row:last-child{border-bottom:0}.simple-row>.muted{font-size:12px;text-align:right}.tab-bar{position:fixed;z-index:5;bottom:0;left:0;right:0;display:flex;justify-content:center;gap:0;background:var(--surface);border-top:1px solid var(--line);padding:8px max(8px,env(safe-area-inset-left)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-right))}.tab-bar button{display:flex;align-items:center;flex-direction:column;justify-content:center;gap:5px;flex:1;max-width:142px;min-height:52px;border-radius:15px;background:none;color:var(--muted);font-size:10px;font-weight:500}.tab-bar button[aria-current=page]{color:var(--accent);background:var(--accent-soft)}.tab-bar button svg{width:22px;height:22px}.error-panel{padding:14px 20px;background:var(--peach);color:var(--danger);font-size:14px;border-radius:15px;position:relative;z-index:6}.error-panel>div{display:flex;gap:15px}dialog{border:1px solid var(--line);border-radius:29px;padding:24px;background:var(--surface);color:var(--ink);width:calc(100% - 26px);max-width:520px;max-height:calc(100dvh - 35px);overflow:auto}dialog::backdrop{background:#15122680;backdrop-filter:blur(5px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between}.dialog-heading h2{font-size:25px}.settings-section{border-bottom:1px solid var(--line);padding:23px 0}.settings-section>p{font-size:13px;color:var(--muted);margin:10px 0 15px}.settings-section select{width:100%;min-height:50px;border:1px solid var(--line);border-radius:14px;padding:11px;background:var(--bg);color:var(--ink);font-size:16px}.file-button{display:flex;justify-content:center;align-items:center;min-height:48px;position:relative;overflow:hidden;border:1px solid var(--line);border-radius:15px;margin-top:12px;font-size:14px;cursor:pointer}.file-button input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.secondary-info>p{margin:10px 0}.info-note{padding:12px 14px;background:var(--mint);border-radius:12px}.empty,.loading{text-align:center;padding:40px 14px}.empty h2{margin:20px 0 10px}.loading>span{display:block;width:45px;height:45px;background:var(--accent-soft);border-radius:14px;margin:50px auto 25px}.loading h1{font-size:25px}.loading p{margin-top:12px;color:var(--muted)}
@media(min-width:750px){main{padding-top:22px}.app-header{padding-top:28px}.hero{padding:30px}.hero h2{max-width:440px;font-size:31px}.metric-tile{min-height:130px}.study-card{padding:32px}.tab-bar{left:50%;right:auto;transform:translateX(-50%);width:580px;border:1px solid var(--line);border-radius:24px 24px 0 0;box-shadow:0 -5px 35px #00000005}.word-face{padding-block:55px}.word-face h2{font-size:56px}}
.chip{min-height:44px}
.study-modes{display:flex;gap:5px;background:var(--line);border-radius:15px;padding:4px;margin-bottom:24px}.study-modes button{flex:1;min-height:44px;border-radius:11px;background:none;color:var(--muted);font-size:13px;font-weight:600}.study-modes button[aria-pressed=true]{background:var(--surface);color:var(--accent);box-shadow:var(--shadow)}.flip-card{display:block;width:100%;min-height:335px;text-align:center;touch-action:pan-y;color:var(--ink);cursor:pointer}.flip-card.is-back{background:var(--accent-soft);border-color:var(--accent)}.flip-card .word-face h2{font-size:39px}.flip-card .example{text-align:left}.flip-hint{display:flex;align-items:center;justify-content:center;gap:8px}.flip-hint svg{width:16px}.card-position{text-align:center;margin:-8px 0 16px}.consult-controls,.collection-actions{display:flex;justify-content:space-between;gap:8px;margin:14px 0}.linguistic-info{margin:17px 0}.linguistic-info dl{margin:10px 0}.linguistic-info dl>div{display:grid;grid-template-columns:100px 1fr;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-size:13px}.linguistic-info dt{color:var(--muted)}.linguistic-info dd{margin:0;overflow-wrap:anywhere}.import-counts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:20px 0}.import-counts p{font-size:12px;color:var(--muted)}.import-counts strong{display:block;font-size:25px;color:var(--ink)}.approval-check{display:flex;gap:12px;align-items:flex-start;font-size:13px;margin:20px 0}.approval-check input{width:22px;height:22px;flex:none;accent-color:var(--accent)}
@media(max-width:360px){main{padding-inline:17px}h1{font-size:29px}.hero{padding:21px}.hero h2{font-size:24px}.metric-tile{padding:17px}.rhythm{grid-template-columns:1fr}.dots{grid-row:2}.study-card{padding:21px 18px}.word-face h2{font-size:39px}.tab-bar button{font-size:9px}}
@media(prefers-reduced-motion:no-preference){button{transition:background-color .15s,transform .15s}button:active:not(:disabled){transform:scale(.98)}main>.hero,main>.study-card{animation:appear .2s ease-out}@keyframes appear{from{opacity:.7;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}}
/* Collections and daily-study additions retain the existing visual system. */
.library-filters{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}.library-filters label{display:flex;flex-direction:column;gap:7px;font-size:13px;color:var(--muted)}.library-filters select{min-width:0;width:100%;min-height:44px;border-radius:12px;padding:8px;background:var(--panel,var(--card));color:inherit;font:inherit;border:1px solid #8885}.status-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:20px 0}.status-grid div{display:flex;flex-direction:column;gap:5px}.status-grid strong{font-size:28px}.status-grid span{font-size:13px}.study-block-note{margin:10px 0 0;font-size:11px;text-align:center}.flashcard-flow .card-stage{min-height:220px}#free-form{display:grid;gap:14px}
.library-filters select{background:var(--surface);color:var(--ink)}
.mode-help{font-size:12px;line-height:1.45;color:var(--muted);margin:-5px 2px 13px;flex:none}.practice-kind{font-size:11px;border:1px solid var(--line);border-radius:10px;padding:6px 8px;white-space:nowrap}.practice-kind.first{background:var(--accent-soft);color:var(--accent)}.practice-kind.scheduled{background:var(--surface)}.learning-summary{margin:20px 0}.learning-summary>div{display:flex;flex-direction:column;gap:5px;margin:14px 0}.learning-summary dt{font-size:12px;color:var(--muted)}.learning-summary dd{margin:0;font-size:16px;font-weight:600}.learning-row{padding:14px 0;border-bottom:1px solid var(--line)}.learning-row>strong{display:inline-block;margin:0 9px 6px 0}.learning-row>p{margin:4px 0;font-size:13px}.flashcard-flow .result-card{min-height:480px;height:auto}.flashcard-flow:has(.result-card){height:auto;min-height:calc(100svh - 178px);padding-bottom:92px}.flashcard-flow .result-card .rating small{font-size:10px;white-space:normal}.flashcard-flow .mode-help{margin-top:-6px}
/* Read-only dashboard: same visual language, history on demand. */
.activity-bars{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px;margin:22px 0}.activity-bars>div{display:flex;flex-direction:column;align-items:center;gap:7px;font-size:12px}.activity-bars svg{width:24px;height:70px;fill:var(--accent,#8874dc)}.performance-stat{display:flex;gap:16px;align-items:center;border-top:1px solid var(--line,#9993);padding-top:18px}.performance-stat>strong{font-size:32px;letter-spacing:-1px}.performance-stat h3{margin:0;font-size:15px}.performance-stat .caption{margin-bottom:0}.usage-info{flex:none;margin-top:8px}.usage-info p{margin:8px 0}.usage-info a{font-size:12px;color:inherit}.usage-info[hidden]{display:none}
.reinforcement-switch{display:flex;gap:8px;margin-bottom:18px}.reinforcement-switch .button{flex:1}.reinforcement-filters{display:grid;gap:12px}.reinforcement-filters label{display:grid;gap:7px;font-size:13px}.reinforcement-filters select{max-width:100%;width:100%;min-height:46px;border-radius:12px;padding:10px;font:inherit;color:var(--ink,inherit);background:var(--surface,#8882);border:1px solid var(--line,#8884)}.reinforcement-count{display:flex;align-items:center;gap:14px;margin:23px 0 12px}.reinforcement-count strong{font-size:42px;line-height:1}.reinforcement-count span{font-size:15px;max-width:200px}.weekly-home strong{font-size:22px}.weekly-home .section-title span{font-size:12px}