@import "https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;700&family=Montserrat:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;700&display=swap";:root{--bg-main:#fdfbf7;--bg-notebook:#faf6ee;--bg-card-south:#f4efe6;--bg-card-north:#fcebeb;--text-dark:#1e1e1e;--text-muted:#5c5c5c;--accent-red:#e54b4b;--accent-red-hover:#c93b3b;--accent-blue:#3f88c5;--border-color:#e2d7c5;--paper-line:#e54b4b26;--font-header:"Outfit", sans-serif;--font-body:"Montserrat", sans-serif;--font-korean:"Noto Sans KR", sans-serif;--shadow-sm:0 2px 8px #0000000a;--shadow-md:0 8px 20px #2d2d2d14;--shadow-lg:0 15px 35px #2d2d2d1f;--shadow-sticker:2px 4px 10px #00000012}*{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--bg-main);color:var(--text-dark);font-family:var(--font-body);scroll-behavior:smooth;font-size:16px;line-height:1.6;overflow-x:hidden}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-main)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}h1,h2,h3,h4,h5,h6{font-family:var(--font-header);color:var(--text-dark);font-weight:700}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.hero-grid{grid-template-columns:1.2fr .8fr;align-items:center;gap:40px;display:grid}.hero-buttons{flex-wrap:wrap;gap:15px;display:flex}@media (width<=768px){.hero-grid{text-align:center;grid-template-columns:1fr;justify-items:center;gap:40px}.hero-buttons{justify-content:center}}@keyframes floatLadybug{0%{transform:translateY(0)rotate(0)}50%{transform:translateY(-10px)rotate(5deg)}to{transform:translateY(0)rotate(0)}}@keyframes crawlLadybug{0%{transform:translate(0)rotate(90deg)}45%{transform:translateY(-30px)rotate(90deg)}50%{transform:translateY(-30px)rotate(180deg)}95%{transform:translate(0)rotate(180deg)}to{transform:translate(0)rotate(90deg)}}.floating-ladybug{cursor:pointer;-webkit-user-select:none;user-select:none;animation:4s ease-in-out infinite floatLadybug;display:inline-block}header{z-index:100;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border-color);background-color:#fdfbf7f2;transition:all .3s;position:sticky;top:0}header.scrolled{box-shadow:var(--shadow-sm);padding:10px 0}.btn-primary{background-color:var(--accent-red);color:#fff;font-family:var(--font-header);cursor:pointer;border:none;border-radius:30px;align-items:center;gap:8px;padding:12px 28px;font-weight:600;text-decoration:none;transition:all .3s;display:inline-flex;box-shadow:0 4px 12px #e54b4b4d}.btn-primary:hover{background-color:var(--accent-red-hover);transform:translateY(-2px);box-shadow:0 6px 16px #e54b4b66}.btn-primary:active{transform:translateY(0)}.btn-secondary{color:var(--text-dark);border:2px solid var(--text-dark);font-family:var(--font-header);cursor:pointer;background-color:#0000;border-radius:30px;align-items:center;gap:8px;padding:10px 26px;font-weight:600;text-decoration:none;transition:all .3s;display:inline-flex}.btn-secondary:hover{background-color:var(--text-dark);color:#fff}.tabs-container{flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:30px;display:flex}.tab-btn{background:var(--bg-notebook);border:1px dashed var(--border-color);font-family:var(--font-header);cursor:pointer;color:var(--text-dark);border-radius:20px;padding:10px 20px;font-size:1rem;font-weight:600;transition:all .2s}.tab-btn:hover{background:#fff;border-style:solid;transform:scale(1.02)}.tab-btn.active{background:var(--accent-red);color:#fff;border-color:var(--accent-red);box-shadow:0 4px 10px #e54b4b33}.toggle-wrapper{justify-content:center;align-items:center;gap:12px;margin-bottom:30px;display:flex}.toggle-label{font-size:.9rem;transition:all .2s}@media (width<=576px){.toggle-wrapper{gap:6px}.toggle-label{font-size:.78rem}.desktop-only{display:none!important}}.ladybug-toggle{background-color:var(--border-color);cursor:pointer;border-radius:20px;flex-shrink:0;width:70px;min-width:70px;height:36px;transition:background-color .3s;position:relative;box-shadow:inset 0 2px 5px #0000000d}.ladybug-toggle.active{background-color:#e2d7c5}.ladybug-knob{background-color:var(--accent-red);border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;transition:left .3s cubic-bezier(.34,1.56,.64,1);display:flex;position:absolute;top:3px;left:3px;box-shadow:0 2px 6px #0003}.ladybug-toggle.active .ladybug-knob{left:37px}.ladybug-knob:before{content:"";background-color:var(--text-dark);width:4px;height:30px;position:absolute;top:0;left:13px}.ladybug-knob:after{content:"";background-color:var(--text-dark);width:4px;height:4px;box-shadow:8px 6px 0 var(--text-dark), -8px 6px 0 var(--text-dark), 6px 16px 0 var(--text-dark), -6px 16px 0 var(--text-dark);border-radius:50%;position:absolute}.ladybug-head{background-color:var(--text-dark);border-radius:50% 50% 0 0;width:8px;height:8px;position:absolute;top:-2px;left:11px}.cards-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;margin-top:20px;display:grid}.flashcard-container{perspective:1000px;cursor:pointer;height:320px}.flashcard-inner{text-align:center;width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard-container.is-flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;border:1px solid var(--border-color);width:100%;height:100%;box-shadow:var(--shadow-sm);border-radius:16px;flex-direction:column;transition:box-shadow .3s,transform .3s;display:flex;position:absolute;overflow:hidden}.flashcard-front{background-color:#fff}.flashcard-back{background-color:var(--bg-notebook);transform:rotateY(180deg)}.flashcard-container:hover .flashcard-front,.flashcard-container:hover .flashcard-back{box-shadow:var(--shadow-md)}.card-header{border-bottom:1px dashed var(--border-color);background-color:var(--bg-notebook);font-family:var(--font-header);justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.card-num{background:var(--text-dark);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:.85rem;font-weight:700;display:flex}.card-title-rus{text-transform:uppercase;color:var(--text-dark);letter-spacing:.5px;font-size:1rem;font-weight:600}.card-body-flat{flex:1;height:100%;display:flex;position:relative}.card-divider{background:var(--border-color);z-index:1;width:1px;position:absolute;top:10%;bottom:10%;left:50%}.card-side{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:8px;padding:16px 12px;display:flex}.card-side.south{background-color:var(--bg-card-south)}.card-side.north{background-color:var(--bg-card-north)}.country-label{font-family:var(--font-header);letter-spacing:.5px;text-transform:uppercase;color:var(--text-muted);font-size:.75rem;font-weight:700}.korean-word{font-family:var(--font-korean);color:var(--text-dark);font-size:1.8rem;font-weight:700;line-height:1.2}.korean-transcript{color:var(--text-muted);font-size:.9rem;font-style:italic}.badge-unified{color:var(--accent-blue);text-transform:uppercase;letter-spacing:.5px;background-color:#e2ecf7;border-radius:10px;margin-top:4px;padding:2px 8px;font-size:.7rem;font-weight:700}.badge-different{color:var(--accent-red);text-transform:uppercase;letter-spacing:.5px;background-color:#fcebeb;border-radius:10px;margin-top:4px;padding:2px 8px;font-size:.7rem;font-weight:700}.card-back-body{flex-direction:column;flex:1;padding:20px;display:flex;position:relative;overflow:hidden}.card-back-body:before{content:"";background:var(--paper-line);width:1px;position:absolute;top:0;bottom:0;left:20px}.card-back-content-scroll{flex-direction:column;flex:1;align-items:center;width:100%;margin-bottom:12px;padding-right:5px;display:flex;overflow-y:auto}.card-back-content-scroll::-webkit-scrollbar{width:6px}.card-back-content-scroll::-webkit-scrollbar-track{background:0 0}.card-back-content-scroll::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.card-back-content-scroll::-webkit-scrollbar-thumb:hover{background:var(--accent-red)}.card-explanation{color:var(--text-dark);text-align:left;margin-top:15px;padding-left:20px;font-size:.95rem;line-height:1.5}.card-emoji{margin:10px 0;font-size:2.8rem}.card-back-footer{border-top:1px dashed var(--border-color);width:100%;font-family:var(--font-header);justify-content:space-between;align-items:center;padding-top:12px;display:flex}.listen-btn{background:var(--text-dark);color:#fff;cursor:pointer;border:none;border-radius:20px;align-items:center;gap:5px;margin-left:15px;padding:6px 12px;font-size:.8rem;font-weight:600;transition:background .2s;display:flex}.listen-btn:hover{background:var(--accent-red)}.flip-hint{color:var(--text-muted);font-size:.75rem}.slider-container{max-width:500px;margin:0 auto;padding:0 10px;position:relative}.slider-controls{justify-content:center;align-items:center;gap:20px;margin-top:20px;display:flex}.slider-btn{border:1px solid var(--border-color);cursor:pointer;width:44px;height:44px;box-shadow:var(--shadow-sm);background:#fff;border-radius:50%;justify-content:center;align-items:center;font-size:1.2rem;transition:all .2s;display:flex}.slider-btn:hover{background:var(--accent-red);color:#fff;border-color:var(--accent-red);transform:scale(1.05)}.slider-btn:disabled{opacity:.3;cursor:not-allowed;transform:none}.slider-progress{font-family:var(--font-header);font-size:.95rem;font-weight:600}.sticker-note{box-shadow:var(--shadow-sticker);border-left:4px solid var(--accent-red);background-color:#fef9d9;border-radius:4px;margin-bottom:25px;padding:16px;font-size:.9rem;position:relative;transform:rotate(-1.5deg)}.sticker-note.blue{border-left-color:var(--accent-blue);background-color:#ebf4fa;transform:rotate(1deg)}.sticker-note:after{content:"📌";font-size:1.2rem;position:absolute;top:-12px;left:50%;transform:translate(-50%)}.sticker-title{font-family:var(--font-header);text-transform:uppercase;margin-bottom:6px;font-size:.85rem;font-weight:700}.form-container{background-color:var(--bg-notebook);border:1px dashed var(--border-color);border-radius:20px;max-width:600px;margin:40px auto 0;padding:30px;position:relative}.form-title{text-align:center;font-family:var(--font-header);margin-bottom:20px}.form-grid{grid-template-columns:1fr 1fr;gap:15px;display:grid}@media (width<=576px){.form-grid{grid-template-columns:1fr}}.form-group{margin-bottom:15px}.form-group.full-width{grid-column:span 2}@media (width<=576px){.form-group.full-width{grid-column:span 1}}.form-label{color:var(--text-dark);margin-bottom:6px;font-size:.85rem;font-weight:600;display:block}.form-input{border:1px solid var(--border-color);width:100%;font-family:var(--font-body);background-color:#fff;border-radius:10px;outline:none;padding:10px 14px;font-size:.9rem;transition:border-color .2s}.form-input:focus{border-color:var(--accent-red)}.section{padding:60px 0}.section.alt-bg{background-color:var(--bg-notebook);border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.section-title{text-align:center;margin-bottom:15px;font-size:2.2rem}.section-subtitle{text-align:center;color:var(--text-muted);max-width:600px;margin:0 auto 40px;font-size:1.05rem}@media (width<=768px){.section-title{font-size:1.8rem}.card-divider{display:none}.card-body-flat{flex-direction:column}.card-side{gap:4px;padding:12px 10px}.korean-word{font-size:1.4rem}.flashcard-container{height:380px}}