.layout-container{display:grid;grid-template-columns:1fr;gap:1.5rem}.left-column{width:100%}@media(min-width:1024px){.layout-container{grid-template-columns:1fr 320px;gap:1.5rem}}.hero-section{display:flex;align-items:center;justify-content:space-between;margin-bottom:3rem;padding:3rem 2rem;background:linear-gradient(145deg,#f9fafb99,#fffffff2);border-radius:1.5rem;border:1.5px solid rgba(229,231,235,.8);box-shadow:0 8px 24px #0000000d;position:relative;overflow:hidden}.hero-section:before{content:"";position:absolute;top:-50%;right:-10%;width:300px;height:300px;background:radial-gradient(circle,rgba(251,191,36,.08) 0%,transparent 70%);border-radius:50%}.hero-content{position:relative;z-index:1}.hero-title{font-size:2.5rem;font-weight:700;color:#111827;margin:0 0 .5rem;letter-spacing:.02em}.hero-subtitle{font-size:1rem;color:#6b7280;margin:0;font-weight:500}.stats-badge{display:inline-flex;align-items:baseline;gap:.5rem;padding:.625rem 1.5rem;background:linear-gradient(145deg,#fff,#f9fafb);border-radius:9999px;border:1.5px solid rgba(229,231,235,.8);box-shadow:0 2px 8px #0000000a,0 0 0 1px #fffc inset;position:relative;z-index:1}.stats-number{font-size:1.875rem;font-weight:700;background:linear-gradient(135deg,#fbbf24,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stats-label{font-size:1rem;color:#111827;font-weight:500}.empty-state{text-align:center;padding:5rem 2rem;display:none;background:linear-gradient(145deg,#f9fafb99,#fffffff2);border-radius:1.5rem;border:1.5px solid rgba(229,231,235,.8);box-shadow:0 8px 24px #0000000d}.empty-state.show{display:block}.empty-icon-wrapper{display:inline-flex;align-items:center;justify-content:center;width:5rem;height:5rem;margin:0 auto 1.5rem;background:linear-gradient(145deg,#fbbf241a,#f59e0b0d);border-radius:50%;border:2px solid rgba(251,191,36,.2)}.empty-icon{width:2.5rem;height:2.5rem;color:#fbbf24}.empty-text{font-size:1.25rem;font-weight:600;color:#111827;margin-bottom:.75rem}.empty-hint{font-size:.9375rem;color:#6b7280;line-height:1.6;max-width:24rem;margin:0 auto}.history-section{display:none;margin-bottom:4rem}.history-section.show{display:block}.history-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:2rem;gap:1rem;padding-bottom:1rem;border-bottom:2px solid rgba(229,231,235,.6)}.history-title{font-size:1.5rem;font-weight:700;color:#111827;margin:0;display:flex;align-items:center;gap:.75rem}.title-icon{width:1.5rem;height:1.5rem;color:#fbbf24;flex-shrink:0}.clear-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.625rem 1.25rem;background:linear-gradient(145deg,#fff,#f9fafb);color:#dc2626;border:1.5px solid rgba(229,231,235,.8);border-radius:.75rem;font-weight:600;font-size:.875rem;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);flex-shrink:0;box-shadow:0 1px 3px #0000000d}.clear-btn:hover{background:linear-gradient(145deg,#fef2f2,#fee2e2);border-color:#dc26264d;color:#b91c1c;transform:translateY(-1px);box-shadow:0 4px 12px #dc262626}.clear-btn:active{transform:translateY(0)}.btn-icon{width:1.125rem;height:1.125rem;transition:transform .2s}.clear-btn:hover .btn-icon{transform:scale(1.1)}.kanji-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:1rem}.kanji-grid .kanji-card{display:flex;align-items:center;justify-content:center;aspect-ratio:1;min-height:80px;background:linear-gradient(145deg,#fff,#fafbfc);border:2px solid rgba(229,231,235,.6);border-radius:1.25rem;transition:all .35s cubic-bezier(.4,0,.2,1);text-decoration:none;box-shadow:0 2px 6px #00000008;position:relative;overflow:hidden}@supports not (aspect-ratio: 1){.kanji-grid .kanji-card:before{content:"";display:block;padding-top:100%}}.kanji-grid .kanji-card:before{content:"";position:absolute;inset:0;background:linear-gradient(145deg,#fbbf240d,#f59e0b14);opacity:0;transition:opacity .35s ease;border-radius:1.25rem}.kanji-grid .kanji-card:hover:before{opacity:1}.kanji-grid .kanji-card:hover{background:linear-gradient(145deg,#fffbeb,#fef3c7);border-color:#fbbf2480;transform:translateY(-3px) scale(1.05);box-shadow:0 8px 20px #fbbf2440,0 2px 8px #f59e0b26}.kanji-grid .kanji-card:active{transform:translateY(-1px) scale(1.03)}.kanji-grid .kanji-card:hover .kanji-char{color:#d97706;transform:scale(1.05)}.kanji-grid .kanji-char{font-size:2.75rem;font-weight:500;color:#111827;line-height:1;font-family:Noto Sans JP,sans-serif;position:relative;z-index:1;transition:all .35s cubic-bezier(.4,0,.2,1)}.faq-section{margin-top:5rem;padding:2.5rem;background:linear-gradient(145deg,#f9fafb99,#fffffff2);border-radius:1.5rem;border:1.5px solid rgba(229,231,235,.8);box-shadow:0 8px 24px #0000000d}.faq-title{font-size:1.75rem;font-weight:700;color:#111827;margin-bottom:2rem;display:flex;align-items:center;gap:.75rem}.faq-title:before{content:"";display:inline-block;width:4px;height:1.5rem;background:linear-gradient(180deg,#fbbf24,#f59e0b);border-radius:2px}.faq-list{display:flex;flex-direction:column;gap:0}.faq-item{background:transparent;border:none;border-bottom:1px solid rgba(229,231,235,.8);border-radius:0;overflow:visible;transition:all .2s;padding:0}.faq-item:last-child{border-bottom:none}.faq-item:hover{border-bottom-color:#fbbf244d}.faq-item[open]{border-bottom-color:#fbbf2480}.faq-question{display:flex;align-items:center;gap:.75rem;padding:1.25rem .5rem;font-size:1.0625rem;font-weight:600;color:#111827;cursor:pointer;transition:all .3s;list-style:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.faq-question::-webkit-details-marker{display:none}.faq-question:after{content:"";margin-left:auto;width:1.5rem;height:1.5rem;flex-shrink:0;background:linear-gradient(145deg,#fbbf241a,#f59e0b0d);border:1.5px solid rgba(251,191,36,.3);border-radius:.5rem;display:flex;align-items:center;justify-content:center;transition:all .3s;background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"><path d="M8 4v8M4 8h8" stroke="%23FBBF24" stroke-width="2" stroke-linecap="round"/></svg>');background-repeat:no-repeat;background-position:center}.faq-item[open] .faq-question:after{background:linear-gradient(145deg,#fbbf24,#f59e0b);border-color:#d9770680;transform:rotate(45deg);background-image:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"><path d="M8 4v8M4 8h8" stroke="white" stroke-width="2" stroke-linecap="round"/></svg>')}.faq-question:hover{color:#f59e0b;padding-left:.75rem}.faq-icon{width:1.25rem;height:1.25rem;flex-shrink:0;color:#fbbf24;transition:color .3s}.faq-question:hover .faq-icon{color:#f59e0b}.faq-answer{padding:0 .5rem 1.5rem 2.5rem;color:#4b5563;line-height:1.75;animation:fadeIn .3s ease-in-out}.faq-answer p{margin:0;font-size:.9375rem}.faq-answer strong{color:#f59e0b;font-weight:600}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.hero-section{flex-direction:column;align-items:flex-start;gap:1rem;padding:2rem 1.5rem}.hero-title{font-size:1.875rem}.hero-subtitle{font-size:.9375rem}.stats-badge{align-self:flex-start}.history-header{margin-bottom:1.5rem;padding-bottom:.75rem}.history-title{font-size:1.125rem}.title-icon{width:1.25rem;height:1.25rem}.clear-btn{font-size:.8125rem;padding:.5rem .875rem;gap:.375rem}.btn-icon{width:1rem;height:1rem}.faq-section{padding:2rem 1.5rem}.kanji-grid{grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:.75rem}.kanji-grid .kanji-card{min-height:70px;border-radius:1rem}.kanji-grid .kanji-char{font-size:2.25rem}.faq-section{margin-top:3rem}.faq-title{font-size:1.5rem}.faq-question{font-size:1rem}.faq-answer{padding:0 0 1.25rem 1.75rem;font-size:.9375rem}.faq-icon{width:1.125rem;height:1.125rem}}@media(max-width:480px){.kanji-grid{grid-template-columns:repeat(auto-fill,minmax(60px,1fr));gap:.625rem}.kanji-grid .kanji-card{min-height:60px;border-radius:.875rem}.kanji-grid .kanji-char{font-size:2rem}.faq-question{font-size:.9375rem}.faq-answer{padding:0 0 1rem 1.5rem;font-size:.875rem}}