:root{--primary-color: #0f172a;--text-primary: #f8fafc;--text-secondary: #94a3b8;--accent-color: #8b5cf6;--accent-hover: #7c3aed;--card-bg: rgba(30, 41, 59, .7);--card-border: rgba(255, 255, 255, .1);--danger-color: #ef4444;--success-color: #10b981;--font-main: "Outfit", sans-serif;--font-jp: "Zen Kaku Gothic New", sans-serif;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1);--glow: 0 0 20px rgba(139, 92, 246, .3)}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-main);background-color:var(--primary-color);color:var(--text-primary);min-height:100vh;line-height:1.5;background-image:radial-gradient(at 0% 0%,rgba(139,92,246,.15) 0px,transparent 50%),radial-gradient(at 100% 0%,rgba(16,185,129,.1) 0px,transparent 50%);background-attachment:fixed}header{position:sticky;top:0;z-index:100;background:#0f172acc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--card-border);padding:.75rem 1rem 0}.header-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.header-actions{display:flex;justify-content:flex-end;align-items:center;gap:.5rem}.logo-container{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}.logo-icon{font-size:2rem;background:linear-gradient(135deg,#8b5cf6,#10b981);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}h1{font-size:1.25rem;font-weight:700;letter-spacing:-.02em;margin:0}.search-bar{position:relative;margin-bottom:.75rem}.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--text-secondary);pointer-events:none;font-size:1.25rem}#search-input{width:100%;background:#1e293b80;border:1px solid var(--card-border);border-radius:12px;padding:.5rem 1rem .5rem 2.5rem;color:var(--text-primary);font-family:var(--font-main);font-size:.95rem;transition:all .2s}#search-input:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 3px #8b5cf633}.filter-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}#sort-select{background:transparent;color:var(--text-secondary);border:none;font-size:.85rem;font-family:var(--font-main);cursor:pointer}.stats{font-size:.75rem;color:var(--text-secondary)}.tab-nav{display:flex;gap:1rem;margin-top:.25rem}.tab-item{flex:1;background:transparent;border:none;color:var(--text-secondary);padding:.5rem;font-weight:600;cursor:pointer;border-bottom:2px solid transparent;display:flex;justify-content:center;align-items:center;gap:.5rem;transition:all .2s;font-size:.9rem}.tab-item:hover{color:var(--text-primary);background:#ffffff05}.tab-item.active{color:var(--accent-color);border-bottom-color:var(--accent-color);background:#8b5cf60d;border-radius:8px 8px 0 0}.word-list{padding:1rem 1rem 5rem;display:flex;flex-direction:column!important;gap:1rem;max-width:800px;margin:0 auto}.word-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;padding:1rem;position:relative;transition:transform .2s,box-shadow .2s;overflow:hidden;display:block}.word-card:before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:var(--accent-color);opacity:0;transition:opacity .2s}.word-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.word-card:hover:before{opacity:1}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.5rem}.english-word{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.japanese-meaning{font-size:.9rem;color:var(--text-secondary);font-family:var(--font-jp);margin-bottom:.5rem}.example-block{background:#0f172a4d;padding:.5rem;border-radius:8px;font-size:.85rem}.example-en{color:#e2e8f0;margin-bottom:.25rem;font-style:italic}.example-jp{color:#64748b;font-size:.8rem;font-family:var(--font-jp)}.card-actions{display:flex;justify-content:flex-end;gap:.5rem;margin-top:.75rem}.action-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:6px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:color .2s,background .2s}.action-btn:hover{background:#ffffff0d;color:var(--text-primary)}.delete-btn:hover{color:var(--danger-color);background:#ef44441a}.study-view{display:flex!important;flex-direction:column!important;height:calc(100vh - 180px);width:100%;max-width:600px;margin:0 auto;padding:.5rem 1rem;gap:.5rem;align-items:stretch}.study-controls{display:flex;justify-content:space-between;align-items:center;width:100%;padding:0 .5rem;order:-1!important;margin-bottom:.25rem}.study-progress-container{background:#0f172acc;padding:4px 12px;border-radius:20px;border:1px solid var(--card-border);min-width:70px;text-align:center}.study-progress{color:#e2e8f0;font-weight:600;font-size:.85rem}.control-btn{background:#1e293b;border:1px solid var(--card-border);color:#fff;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 6px -1px #0000004d;z-index:10}.control-btn:hover{background:var(--accent-color);border-color:var(--accent-color);transform:translateY(-2px)}.study-card-container{flex:1;width:100%;display:flex;flex-direction:column;overflow-y:auto;max-height:100%}.study-card{position:relative;background:var(--card-bg);border:1px solid var(--card-border);border-radius:20px;padding:0;width:100%;display:flex;flex-direction:column;box-shadow:0 10px 30px -5px #00000080;overflow:hidden;min-height:350px}.card-section{padding:1rem;display:flex;flex-direction:column;align-items:center;text-align:center;width:100%;position:relative}.card-section.main-word{background:linear-gradient(135deg,#6366f133,#a855f71a);padding:4rem 1rem 1.5rem;border-bottom:1px solid rgba(255,255,255,.1);flex-direction:row;justify-content:center;gap:1rem}.study-word{font-size:2rem;font-weight:700;color:#fff;margin:0;line-height:1.1;text-shadow:0 2px 4px rgba(0,0,0,.3);overflow-wrap:break-word;max-width:80%}.play-btn-wrapper{margin-top:0}.play-btn-large{width:44px;height:44px;border-radius:50%;background:#ffffff1a;color:#fff;border:1px solid rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;flex-shrink:0}.play-btn-large:hover{background:#fff;color:var(--accent-color);transform:scale(1.1)}.play-btn-large span{font-size:24px}.section-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:#94a3b8;background:#1e293bcc;padding:4px 10px;border-radius:12px;margin-bottom:.5rem;display:inline-block;border:1px solid rgba(255,255,255,.1);font-weight:600}.study-meaning{font-size:1.25rem;color:var(--accent-color);font-weight:700;line-height:1.4;margin-bottom:.5rem}.study-example-en{font-size:1rem;color:#e2e8f0;font-style:italic;line-height:1.4;margin-bottom:.25rem}.study-example-jp{font-size:.85rem;color:#94a3b8}.card-divider{height:1px;background:#ffffff0d;width:100%;border:none;margin:0}.fab{position:fixed;bottom:1.5rem;right:1.5rem;width:50px;height:50px;border-radius:50%;background-color:var(--accent-color);color:#fff;border:none;box-shadow:var(--shadow-lg),var(--glow);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .2s,background .2s;z-index:200}.fab:hover{transform:scale(1.1);background-color:var(--accent-hover)}.fab:active{transform:scale(.95)}.modal{background:transparent;padding:0;border:none;width:100%;height:100%;max-width:none;max-height:none;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000}.modal::backdrop{background:#000000b3}.modal-content{background:var(--card-bg);border:1px solid var(--card-border);width:90%;max-width:500px;border-radius:20px;padding:1.5rem;box-shadow:0 25px 50px -12px #00000080;animation:slideUp .3s ease-out;margin:auto}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.modal-header h2{font-size:1.25rem;color:var(--text-primary)}.icon-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:50%;display:flex;align-items:center;justify-content:center}.icon-btn:hover{background:#ffffff0d;color:var(--text-primary)}.input-group{margin-bottom:1rem;position:relative}.input-group label{display:block;font-size:.8rem;color:var(--text-secondary);margin-bottom:.5rem}.input-group input,.input-group textarea{width:100%;background:#0f172a80;border:1px solid var(--card-border);border-radius:8px;padding:10px;color:var(--text-primary);font-family:var(--font-main);font-size:1rem}.input-group textarea{resize:vertical}.text-btn{position:absolute;top:0;right:0;background:transparent;border:none;color:var(--accent-color);font-size:.8rem;cursor:pointer;padding:0 4px}.separator{height:1px;background:var(--card-border);margin:1.5rem 0}.btn-primary{width:100%;padding:.8rem;border-radius:10px;border:none;background:var(--accent-color);color:#fff;font-weight:600;font-size:1rem;cursor:pointer;margin-top:1rem;box-shadow:var(--glow)}.btn-primary:hover{background:var(--accent-hover)}.filter-btn{background:#1e293b80;border:1px solid var(--card-border);color:var(--text-secondary);padding:4px 12px;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:4px;font-size:.85rem;transition:all .2s}.filter-btn:hover{background:#ffffff0d;color:var(--text-primary)}.filter-btn.active{background:#eab30833;color:#eab308;border-color:#eab30880}.filter-btn .material-symbols-rounded{font-size:18px}.star-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:8px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .2s}.star-btn:hover{color:#eab308;background:#eab3081a}.star-btn.active{color:#eab308}.star-btn .material-symbols-rounded{font-variation-settings:"FILL" 0;transition:font-variation-settings .2s}.star-btn.active .material-symbols-rounded{font-variation-settings:"FILL" 1}.study-card .star-btn{position:absolute;top:1rem;left:1rem;right:auto;width:44px;height:44px;z-index:10}.study-card .star-btn .material-symbols-rounded{font-size:28px}