@import"https://fonts.googleapis.com/css2?family=Caveat:wght@600;700&family=Fredoka:wght@500;600;700&family=Nunito:wght@600;700;800;900&family=Outfit:wght@500;600;700;800&family=Short+Stack&display=swap";:root{--bg-color: #f4efe6;--bg-desk: radial-gradient(ellipse at 50% 25%, #fbf8f2 0%, #ede5d7 65%, #dfd5c4 100%);--paper-bg: #fffdfa;--paper-line: #d0e1fd;--margin-line: #ff8a65;--text-main: #2c3e50;--text-sub: #607d8b;--font-notebook: "Caveat", "Short Stack", cursive;--font-number: "Fredoka", "Nunito", sans-serif;--font-ui: "Outfit", sans-serif;--card-bg: rgba(255, 255, 255, .95);--card-bg-solid: #ffffff;--card-border: rgba(0, 0, 0, .08);--input-bg: #ffffff;--input-border: rgba(0, 0, 0, .12);--keypad-bg: #ffffff;--keypad-text: #2c3e50;--keypad-hover: #e1f5fe;--keypad-active: #b3e5fc;--keypad-border: rgba(0, 0, 0, .08);--keypad-action-bg: #f5f5f5;--keypad-shadow: 0 3px 6px rgba(0, 0, 0, .05);--display-bg: rgba(255, 255, 255, .5);--binder-hole-bg: #e8ded0;--binder-ring-color: #90a4ae;--text-shadow-num: 2px 2px 0px rgba(255, 255, 255, .9);--pastel-mint: #d4edda;--pastel-mint-dark: #28a745;--pastel-blue: #d0e8f2;--pastel-blue-dark: #0288d1;--pastel-yellow: #fff3cd;--pastel-yellow-dark: #f57f17;--pastel-peach: #ffe5d9;--pastel-peach-dark: #e65100;--pastel-purple: #ebd9fc;--pastel-purple-dark: #7b1fa2;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .05);--shadow-md: 0 8px 24px rgba(0, 0, 0, .08);--shadow-notebook: 0 4px 6px rgba(0, 0, 0, .03), 0 12px 28px rgba(0, 0, 0, .08), 0 24px 48px rgba(0, 0, 0, .05), inset 0 0 100px rgba(0, 0, 0, .02)}[data-theme=ruled]{--bg-color: #f4efe6;--bg-desk: radial-gradient(ellipse at 50% 25%, #fbf8f2 0%, #ede5d7 65%, #dfd5c4 100%);--paper-bg: #fffdfa;--paper-line: #d0e1fd;--margin-line: #ff8a65;--text-main: #2c3e50;--text-sub: #607d8b;--card-bg: rgba(255, 255, 255, .95);--card-bg-solid: #ffffff;--card-border: rgba(0, 0, 0, .08);--input-bg: #ffffff;--input-border: rgba(0, 0, 0, .12);--keypad-bg: #ffffff;--keypad-text: #2c3e50;--keypad-hover: #e1f5fe;--keypad-active: #b3e5fc;--keypad-border: rgba(0, 0, 0, .08);--keypad-action-bg: #f5f5f5;--keypad-shadow: 0 3px 6px rgba(0, 0, 0, .05);--display-bg: rgba(255, 255, 255, .5);--binder-hole-bg: #e8ded0;--binder-ring-color: #90a4ae;--text-shadow-num: 2px 2px 0px rgba(255, 255, 255, .9)}[data-theme=graph]{--bg-color: #eef5fb;--bg-desk: radial-gradient(ellipse at 50% 25%, #f7fbfe 0%, #e3edf7 65%, #d1e2f0 100%);--paper-bg: #f8fbfe;--paper-line: #e1edf7;--margin-line: #e57373;--text-main: #1e293b;--text-sub: #546e7a;--card-bg: rgba(255, 255, 255, .95);--card-bg-solid: #ffffff;--card-border: rgba(0, 0, 0, .08);--input-bg: #ffffff;--input-border: rgba(0, 0, 0, .12);--keypad-bg: #ffffff;--keypad-text: #1e293b;--keypad-hover: #e0f2fe;--keypad-active: #bae6fd;--keypad-border: rgba(0, 0, 0, .08);--keypad-action-bg: #f0f7fc;--keypad-shadow: 0 3px 6px rgba(0, 0, 0, .05);--display-bg: rgba(255, 255, 255, .55);--binder-hole-bg: #dbe7f2;--binder-ring-color: #64b5f6;--text-shadow-num: 2px 2px 0px rgba(255, 255, 255, .9)}[data-theme=kraft]{--bg-color: #d4c2ac;--bg-desk: radial-gradient(ellipse at 50% 25%, #ded0be 0%, #caa98c 65%, #b59275 100%);--paper-bg: #edd9c2;--paper-line: rgba(141, 105, 80, .22);--margin-line: #b25826;--text-main: #341f14;--text-sub: #6f5342;--card-bg: rgba(251, 243, 231, .94);--card-bg-solid: #f6ebd8;--card-border: rgba(120, 85, 60, .18);--input-bg: #fbf4e8;--input-border: rgba(120, 85, 60, .24);--keypad-bg: #f6ecd8;--keypad-text: #341f14;--keypad-hover: #ecd9bf;--keypad-active: #dfcaa8;--keypad-border: rgba(120, 85, 60, .2);--keypad-action-bg: #e7d5bd;--keypad-shadow: 0 3px 6px rgba(70, 40, 15, .08);--display-bg: rgba(255, 248, 238, .45);--binder-hole-bg: #bfa58a;--binder-ring-color: #6d4c41;--text-shadow-num: 1px 1px 0px rgba(255, 250, 240, .7);--pastel-mint: #dfedc5;--pastel-mint-dark: #33691e;--pastel-blue: #f5d7c3;--pastel-blue-dark: #b85922;--pastel-yellow: #faeac0;--pastel-yellow-dark: #b26a00;--pastel-peach: #fad4c0;--pastel-peach-dark: #bf4300;--shadow-notebook: 0 6px 12px rgba(60, 35, 10, .1), 0 16px 36px rgba(60, 35, 10, .16), 0 30px 60px rgba(0, 0, 0, .1), inset 0 0 100px rgba(130, 80, 30, .05)}[data-theme=chalkboard]{--bg-color: #191f1d;--bg-desk: radial-gradient(ellipse at 50% 25%, #242c2a 0%, #151a19 65%, #0e1211 100%);--paper-bg: #212b27;--paper-line: rgba(255, 255, 255, .11);--margin-line: rgba(255, 213, 79, .5);--text-main: #f3f7f5;--text-sub: #9db2a9;--card-bg: rgba(36, 47, 43, .94);--card-bg-solid: #2d3b35;--card-border: rgba(255, 255, 255, .12);--input-bg: #19211e;--input-border: rgba(255, 255, 255, .22);--keypad-bg: #2b3833;--keypad-text: #f3f7f5;--keypad-hover: #394a43;--keypad-active: #475d54;--keypad-border: rgba(255, 255, 255, .14);--keypad-action-bg: #1f2824;--keypad-shadow: 0 3px 8px rgba(0, 0, 0, .35);--display-bg: rgba(18, 24, 22, .5);--binder-hole-bg: #131816;--binder-ring-color: #78909c;--text-shadow-num: 0 0 12px rgba(255, 255, 255, .35), 2px 2px 4px rgba(0, 0, 0, .7);--pastel-mint: #1d3d29;--pastel-mint-dark: #81c784;--pastel-blue: #1b3846;--pastel-blue-dark: #4fc3f7;--pastel-yellow: #3c381c;--pastel-yellow-dark: #fff176;--pastel-peach: #3e261f;--pastel-peach-dark: #ff8a65;--shadow-notebook: 0 8px 16px rgba(0, 0, 0, .5), 0 20px 48px rgba(0, 0, 0, .6), inset 0 0 100px rgba(0, 0, 0, .4)}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-ui);background-color:var(--bg-color);background-image:var(--bg-desk);background-attachment:fixed;background-size:cover;color:var(--text-main);min-height:100vh;min-height:100dvh;display:flex;justify-content:center;align-items:center;padding:max(1.5rem,env(safe-area-inset-top)) max(1rem,env(safe-area-inset-right)) max(1.5rem,env(safe-area-inset-bottom)) max(1rem,env(safe-area-inset-left));overflow-x:hidden;touch-action:manipulation;user-select:none;-webkit-user-select:none;transition:background .35s ease,color .3s ease}.app-viewport{width:100%;max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}.notebook-page{position:relative;background-color:var(--paper-bg);color:var(--text-main);border-radius:18px;box-shadow:var(--shadow-notebook);border:1px solid var(--card-border);padding:2rem 2.5rem 2.5rem 4.5rem;min-height:620px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden;transition:background .35s ease,border-color .3s ease,box-shadow .35s ease,color .3s ease}[data-theme=ruled] .notebook-page{background-image:repeating-linear-gradient(transparent,transparent 31px,var(--paper-line) 31px,var(--paper-line) 32px);background-position:0 10px}[data-theme=graph] .notebook-page{background-image:linear-gradient(to right,var(--paper-line) 1px,transparent 1px),linear-gradient(to bottom,var(--paper-line) 1px,transparent 1px);background-size:28px 28px}[data-theme=kraft] .notebook-page{background-image:repeating-linear-gradient(transparent,transparent 31px,var(--paper-line) 31px,var(--paper-line) 32px);background-position:0 10px}[data-theme=chalkboard] .notebook-page{background-image:repeating-linear-gradient(transparent,transparent 35px,var(--paper-line) 35px,var(--paper-line) 36px);background-position:0 10px}.notebook-margin-line{position:absolute;top:0;bottom:0;left:3.5rem;width:2px;background-color:var(--margin-line);opacity:.85;z-index:2;pointer-events:none;transition:background-color .3s ease}.spiral-binder{position:absolute;top:2rem;bottom:2rem;left:1.2rem;display:flex;flex-direction:column;justify-content:space-between;z-index:3;pointer-events:none}.binder-hole{width:14px;height:14px;background-color:var(--binder-hole-bg, var(--bg-color));border-radius:50%;box-shadow:inset 1px 2px 4px #00000059,0 0 0 1.5px #00000014;position:relative;transition:background-color .3s ease}.binder-hole:after{content:"";position:absolute;top:-4px;left:-8px;width:14px;height:20px;border-left:3px solid var(--binder-ring-color, #78909c);border-top:2px solid transparent;border-bottom:2px solid transparent;border-radius:50%;transform:rotate(-12deg);opacity:.85;transition:border-color .3s ease}[data-theme=chalkboard] .doodle-svg{filter:brightness(1.6) contrast(1.2);opacity:.35!important}[data-theme=kraft] .doodle-svg{filter:sepia(.3) contrast(1.1)}.header-bar{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.75rem;padding-bottom:1rem;border-bottom:2px dashed var(--card-border);margin-bottom:1rem;z-index:4}.daily-goal-container{margin-bottom:1.25rem;background:var(--display-bg);border:1px dashed var(--card-border);border-radius:12px;padding:.6rem .9rem;display:flex;flex-direction:column;gap:.4rem;z-index:4}.daily-goal-header{display:flex;justify-content:space-between;align-items:center;font-family:var(--font-ui);font-size:.85rem;font-weight:700}.daily-goal-title{display:flex;align-items:center;gap:.35rem;color:var(--text-main)}.daily-goal-icon{color:var(--pastel-peach-dark)}.daily-goal-stats{font-size:.8rem}.goal-pts-text{color:var(--text-sub)}.goal-completed-badge{color:var(--pastel-mint-dark);background-color:var(--pastel-mint);padding:.15rem .5rem;border-radius:8px;display:inline-flex;align-items:center}.daily-goal-track{height:8px;width:100%;background-color:#00000014;border-radius:4px;overflow:hidden;position:relative}.daily-goal-fill{height:100%;background:linear-gradient(90deg,#81d4fa,#4fc3f7);border-radius:4px;transition:width .4s ease-in-out,background-color .4s ease}.daily-goal-fill.completed{background:linear-gradient(90deg,#81c784,#66bb6a)}.title-group{display:flex;align-items:center;gap:.75rem}.app-title{font-family:var(--font-notebook);font-size:2.2rem;font-weight:700;color:var(--text-main);line-height:1.1;display:flex;align-items:center;gap:.5rem}.title-badge{font-family:var(--font-ui);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:.2rem .6rem;border-radius:12px;background-color:var(--pastel-blue);color:var(--pastel-blue-dark)}.stats-bar{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem;justify-content:flex-end}.stat-pill{display:flex;align-items:center;gap:.4rem;background-color:var(--card-bg);padding:.4rem .85rem;border-radius:20px;border:1px solid var(--card-border);box-shadow:var(--shadow-sm);font-weight:700;font-size:.95rem;color:var(--text-main)}.stat-score{background-color:var(--pastel-mint);color:var(--pastel-mint-dark)}.stat-streak{background-color:var(--pastel-peach);color:var(--pastel-peach-dark)}.icon-btn{background:var(--card-bg);border:1px solid var(--card-border);border-radius:50%;width:40px;height:40px;min-width:40px;min-height:40px;max-width:40px;max-height:40px;flex-shrink:0;aspect-ratio:1 / 1;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-main);transition:all .2s ease;box-shadow:var(--shadow-sm);padding:0;box-sizing:border-box}.icon-btn:hover{transform:translateY(-2px);background:var(--keypad-hover);box-shadow:var(--shadow-md)}.icon-btn:active{transform:translateY(0)}.display-area{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:240px;position:relative;margin:1rem 0;border-radius:16px;background:var(--display-bg);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px dashed var(--card-border);padding:2rem 1rem}.equation-text{font-family:var(--font-number);font-size:4rem;font-weight:700;color:var(--text-main);text-align:center;letter-spacing:.02em;text-shadow:var(--text-shadow-num);word-break:break-word;animation:popIn .3s cubic-bezier(.175,.885,.32,1.275)}.flash-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem}.flash-operator{font-family:var(--font-number);font-size:2.8rem;font-weight:700;color:var(--pastel-blue-dark);margin-bottom:-.5rem}.flash-number{font-family:var(--font-number);font-size:5.5rem;font-weight:800;color:var(--text-main);line-height:1;text-shadow:var(--text-shadow-num);animation:flashBounce .25s cubic-bezier(.175,.885,.32,1.275)}.flash-ready{font-family:var(--font-notebook);font-size:2.8rem;color:var(--pastel-blue-dark);font-weight:700}.flash-start-wrapper{display:flex;flex-direction:column;align-items:center;gap:1rem;animation:fadeIn .3s ease}.flash-ready-subtitle{font-family:var(--font-notebook);font-size:2.2rem;color:var(--text-sub);font-weight:700}.start-flash-btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;font-family:var(--font-ui);font-size:1.4rem;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--pastel-blue-dark),#0277bd);border:none;border-radius:50px;padding:.85rem 2rem;box-shadow:0 4px 14px #0288d159;cursor:pointer;transition:all .2s cubic-bezier(.175,.885,.32,1.275)}.start-flash-btn:hover{transform:translateY(-2px) scale(1.04);box-shadow:0 6px 18px #0288d173}.start-flash-btn:active{transform:translateY(1px) scale(.98)}.flash-timer-bar{width:220px;height:8px;background:#00000014;border-radius:10px;margin-top:1.5rem;overflow:hidden}.flash-timer-fill{height:100%;background:linear-gradient(90deg,var(--pastel-blue-dark),#4fc3f7);border-radius:10px;transition:width .05s linear}.answer-area{display:flex;flex-direction:column;align-items:center;gap:1rem;width:100%;z-index:4}.answer-form{display:flex;align-items:center;justify-content:center;gap:.75rem;width:100%;max-width:420px}.answer-input{width:100%;font-family:var(--font-number);font-size:2.8rem;font-weight:700;text-align:center;padding:.5rem 1rem;border-radius:16px;border:3px solid var(--input-border);background:var(--input-bg);color:var(--text-main);box-shadow:inset 0 2px 6px #0000000f,var(--shadow-sm);outline:none;transition:all .2s ease}.answer-input:focus{border-color:var(--pastel-blue-dark);box-shadow:inset 0 2px 6px #0000000f,0 0 0 4px #0288d126}.answer-input.correct{border-color:var(--pastel-mint-dark);background-color:var(--pastel-mint);animation:pulseGreen .4s ease}.answer-input.wrong{border-color:#e53935;background-color:#ffebee;animation:shake .4s ease}.submit-btn{font-family:var(--font-ui);font-size:1.1rem;font-weight:700;padding:.85rem 1.8rem;border-radius:16px;border:none;background:linear-gradient(135deg,#4fc3f7,#0288d1);color:#fff;cursor:pointer;box-shadow:0 4px 14px #0288d14d;transition:all .2s ease;white-space:nowrap}.submit-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #0288d166}.submit-btn:active{transform:translateY(0)}.feedback-banner{font-family:var(--font-notebook);font-size:1.8rem;font-weight:700;min-height:2.2rem;text-align:center;display:flex;align-items:center;justify-content:center;gap:.5rem}.feedback-banner.correct{color:#2e7d32}.feedback-banner.wrong{color:#c62828}.virtual-keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;width:100%;max-width:320px;margin-top:.5rem}.keypad-btn{font-family:var(--font-number);font-size:1.8rem;font-weight:700;height:52px;border-radius:14px;border:1px solid var(--keypad-border);background:var(--keypad-bg);color:var(--keypad-text);cursor:pointer;box-shadow:var(--keypad-shadow);transition:all .15s 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var(--card-border);max-height:90vh;overflow-y:auto}.modal-card.tabbed-settings-card{padding:0;display:flex;flex-direction:column;max-height:85vh;overflow:hidden}.modal-card.tabbed-settings-card .modal-header{padding:1.25rem 1.75rem .75rem;margin-bottom:0}.settings-tabs-bar{display:flex;background-color:#0000000a;padding:.4rem 1.75rem;gap:.5rem;border-bottom:1px solid var(--card-border)}.tab-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:.4rem;padding:.5rem .75rem;border-radius:12px;border:none;background:transparent;font-family:var(--font-ui);font-weight:700;font-size:.85rem;color:var(--text-sub);cursor:pointer;transition:all .2s ease}.tab-btn:hover{background-color:#0000000d;color:var(--text-main)}.tab-btn.active{background-color:var(--card-bg-solid);color:var(--pastel-blue-dark);box-shadow:0 2px 8px #0000000f}.modal-body-scrollable{flex:1;overflow-y:auto;padding:1.25rem 1.75rem}.modal-footer-pinned{padding:1rem 1.75rem 1.25rem;border-top:2px dashed var(--card-border);background-color:var(--paper-bg);border-bottom-left-radius:24px;border-bottom-right-radius:24px}.presets-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.75rem}.preset-card{background:var(--card-bg-solid);border:2px solid var(--card-border);border-radius:14px;padding:.8rem 1rem;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 2px 6px #0000000a}.preset-card:hover{border-color:var(--pastel-blue-dark);background:var(--pastel-blue);transform:translateY(-2px)}.preset-card.custom{flex-direction:row;align-items:center;justify-content:space-between}.preset-name{font-family:var(--font-ui);font-weight:700;font-size:.95rem;color:var(--text-main);margin-bottom:.2rem}.preset-details{font-size:.75rem;color:var(--text-sub);font-weight:600}.delete-preset-btn{color:#e57373;padding:.25rem;border-radius:8px;opacity:.7}.delete-preset-btn:hover{opacity:1;background-color:#ffebee}.add-preset-form{display:flex;gap:.5rem;margin-top:.5rem;margin-bottom:.5rem}.preset-name-input{flex:1;padding:.4rem .8rem;border-radius:10px;border:1px solid var(--input-border);background:var(--input-bg);color:var(--text-main);font-family:var(--font-ui);font-size:.85rem;outline:none}.preset-name-input:focus{border-color:var(--pastel-blue-dark)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;border-bottom:2px dashed var(--card-border);padding-bottom:.75rem}.modal-title{font-family:var(--font-notebook);font-size:2.2rem;font-weight:700}.settings-section{display:flex;flex-direction:column;gap:1.25rem}.setting-group{display:flex;flex-direction:column;gap:.5rem}.setting-label{font-weight:700;font-size:.95rem;color:var(--text-sub);text-transform:uppercase;letter-spacing:.05em}.chip-group{display:flex;flex-wrap:wrap;gap:.5rem}.chip-btn{flex:1 1 auto;min-width:75px;padding:.55rem .75rem;border-radius:12px;border:2px solid var(--card-border);background:var(--card-bg-solid);font-family:var(--font-ui);font-weight:700;font-size:.92rem;cursor:pointer;text-align:center;transition:all .2s 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