:root{--paper:#eef1f6;--card:#fbfcfe;--card-border:#dfe5ee;--hairline:#e6eaf1;--ink:#2c3240;--muted:#7d8798;--faint:#a3adbd;--accent:#4a6fa5;--accent-tint:#e3ebf5;--accent-deep:#3b5c8c;--green:#3f8f6a;--green-tint:#dcefe6;--red:#b5544d;--red-tint:#f5e0de;--gold:#c69a3f;--gold-tint:#f4ecd6;--shadow-card:0 8px 22px -14px #2837504d;--serif:"Instrument Serif", Georgia, "Times New Roman", serif;--sans:"Hanken Grotesque", "Segoe UI", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;overscroll-behavior-y:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}input,textarea,.lesson-text,.lesson-translation{-webkit-user-select:text;user-select:text}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}button{cursor:pointer;touch-action:manipulation;background:0 0;border:none}.app{max-width:430px;min-height:100dvh;margin:0 auto;position:relative}.screen{padding:calc(18px + env(safe-area-inset-top)) 20px calc(30px + env(safe-area-inset-bottom))}.screen-loading{text-align:center;color:var(--muted);padding:80px 20px}.screen-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.screen-header h1{font-family:var(--serif);font-size:30px;font-weight:400}.header-actions{align-items:center;gap:8px;display:flex}.project-title{font-family:var(--serif);margin-bottom:14px;font-size:30px;font-weight:400}.btn-primary{background:var(--accent);color:#fff;border-radius:12px;padding:10px 18px;font-size:15px;font-weight:600}.btn-primary:active{background:var(--accent-deep)}.btn-primary:disabled{opacity:.55}.btn-big{width:100%;box-shadow:var(--shadow-card);margin-top:20px;padding:15px;font-size:16px;display:block}.btn-ghost{color:var(--accent);border-radius:9px;padding:6px 8px;font-size:14px;font-weight:600}.btn-ghost:active{background:var(--accent-tint)}.btn-danger{background:var(--red);color:#fff;border-radius:12px;padding:10px 18px;font-size:15px;font-weight:600}.btn-danger-text{color:var(--red)}.card-list{flex-direction:column;gap:10px;display:flex}.project-card{text-align:left;background:var(--card);border:1px solid var(--card-border);box-shadow:var(--shadow-card);border-radius:16px;padding:14px 16px;position:relative}.project-card-top{justify-content:space-between;align-items:center;gap:8px;padding-right:22px;display:flex}.project-name{font-family:var(--serif);font-size:21px}.project-card-meta{color:var(--muted);margin-top:4px;font-size:13px}.card-delete{color:var(--faint);padding:2px 6px;font-size:18px;position:absolute;top:8px;right:12px}.empty-state{background:var(--card);border:1px dashed var(--card-border);color:var(--muted);border-radius:16px;flex-direction:column;gap:8px;padding:22px 18px;font-size:14.5px;display:flex}.chip{background:var(--accent-tint);color:var(--accent-deep);border-radius:999px;padding:4px 11px;font-size:12.5px;font-weight:600;display:inline-block}.chip-row{flex-wrap:wrap;gap:8px;display:flex}.chip-row-center{justify-content:center}.chip.active{background:var(--accent);color:#fff}.chip-word{background:var(--card);border:1px solid var(--card-border);color:var(--ink);padding:8px 15px;font-size:15px}.chip-word.correct{background:var(--green-tint);border-color:var(--green);color:var(--green)}.chip-word.wrong{background:var(--red-tint);border-color:var(--red);color:var(--red)}.texts-section{margin-top:22px}.texts-section h2{font-family:var(--serif);margin-bottom:10px;font-size:21px;font-weight:400}.lesson-card{background:var(--card);border:1px solid var(--card-border);border-radius:14px;margin-bottom:10px;overflow:hidden}.lesson-card-head{text-align:left;flex-direction:column;align-items:flex-start;gap:3px;width:100%;padding:12px 15px;display:flex}.lesson-title{font-family:var(--serif);font-size:18px}.lesson-meta{color:var(--muted);font-size:12.5px}.lesson-body{flex-direction:column;align-items:flex-start;gap:8px;padding:0 15px 13px;display:flex}.lesson-text{white-space:pre-wrap;font-size:15px;line-height:1.55}.lesson-translation{color:var(--muted);white-space:pre-wrap;border-left:3px solid var(--accent-tint);padding-left:10px;font-size:14px;line-height:1.5}.pending-card{color:var(--muted);align-items:center;gap:12px;padding:14px 15px;font-size:14.5px;display:flex}.spinner{border:2.5px solid var(--accent);border-top-color:#0000;border-radius:50%;flex:none;width:18px;height:18px;animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.game-section{margin-top:6px}.segmented{background:var(--accent-tint);border-radius:12px;margin-bottom:12px;padding:3px;display:flex}.segmented button{color:var(--accent-deep);border-radius:10px;flex:1;padding:8px 0;font-size:14px;font-weight:600}.segmented button.active{background:var(--card);box-shadow:0 2px 8px -3px #28375059}.game-card{background:var(--card);border:1px solid var(--card-border);box-shadow:var(--shadow-card);border-radius:16px;padding:16px}.game-progress{color:var(--muted);justify-content:space-between;margin-bottom:10px;font-size:13px;display:flex}.game-direction{color:var(--faint)}.game-prompt{font-family:var(--serif);text-align:center;margin:10px 0 18px;font-size:26px}.choice-list{flex-direction:column;gap:8px;display:flex}.choice{background:var(--paper);border:1px solid var(--card-border);text-align:left;border-radius:12px;padding:12px 14px;font-size:15.5px;transition:background .15s,border-color .15s}.choice.correct{background:var(--green-tint);border-color:var(--green);color:var(--green);font-weight:600}.choice.wrong{background:var(--red-tint);border-color:var(--red);color:var(--red)}.choice.faded{opacity:.55}.game-sentence{font-family:var(--serif);text-align:center;margin:8px 0 6px;font-size:21px;line-height:1.5}.game-sentence.solved{color:var(--green)}.game-hint{color:var(--muted);text-align:center;margin-bottom:16px;font-size:13.5px}.game-end{text-align:center;padding:26px 16px}.game-score{font-family:var(--serif);font-size:40px}.game-score-sub{color:var(--muted);margin:6px 0 16px}.flashcard{perspective:900px;width:100%;margin:4px 0 12px;display:block}.flashcard-inner{width:100%;min-height:150px;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.4,0,.2,1);display:block;position:relative}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;background:var(--paper);border:1px solid var(--card-border);border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:18px;display:flex;position:absolute;inset:0}.flashcard-back{background:var(--accent-tint);transform:rotateY(180deg)}.flashcard-term{font-family:var(--serif);text-align:center;font-size:27px}.flashcard-note{color:var(--muted);text-align:center;font-size:13px}.flashcard-actions{justify-content:center;gap:12px;display:flex}.flashcard-hint{text-align:center;color:var(--faint);font-size:13px}.login-wrap{align-items:center;min-height:100dvh;padding:24px 20px;display:flex}.login-card{background:var(--card);border:1px solid var(--card-border);width:100%;box-shadow:var(--shadow-card);border-radius:20px;padding:28px 22px}.login-kicker{text-align:center;color:var(--muted);font-size:14px}.login-title{text-align:center;font-family:var(--serif);margin:2px 0 18px;font-size:32px;font-weight:400}.login-switch{text-align:center;color:var(--muted);margin-top:16px;font-size:14px}.login-switch button{color:var(--accent);font-weight:600}.field{margin-bottom:13px}.field label{color:var(--muted);margin-bottom:5px;font-size:13px;font-weight:600;display:block}.field input{background:var(--paper);border:1px solid var(--card-border);border-radius:11px;width:100%;padding:11px 13px;font-size:16px}.field input:focus{outline:2px solid var(--accent);outline-offset:-1px}.field-hint{color:var(--faint);margin-top:5px;font-size:12.5px}.form-error{color:var(--red);background:var(--red-tint);border-radius:10px;margin:10px 0;padding:9px 12px;font-size:13.5px}.modal-overlay{z-index:50;background:#1e263473;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal{background:var(--card);border-radius:18px;width:100%;max-width:390px;padding:20px;box-shadow:0 18px 44px -16px #141e3280}.modal h2{font-family:var(--serif);margin-bottom:12px;font-size:22px;font-weight:400}.modal-text{color:var(--muted);margin-bottom:8px;font-size:14.5px;line-height:1.5}.modal-actions{justify-content:flex-end;gap:10px;margin-top:14px;display:flex}.invite-code{font-family:var(--serif);letter-spacing:6px;text-align:center;background:var(--accent-tint);color:var(--accent-deep);-webkit-user-select:text;user-select:text;border-radius:14px;margin-bottom:10px;padding:18px 10px;font-size:40px}.toast{left:50%;bottom:calc(24px + env(safe-area-inset-bottom));background:var(--ink);color:#fff;z-index:60;border-radius:12px;max-width:min(90vw,390px);padding:11px 18px;font-size:14px;position:fixed;transform:translate(-50%);box-shadow:0 10px 30px -8px #141e328c}