:root{--primary: #4f46e5;--primary-hover: #4338ca;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-main: #111827;--text-light: #6b7280;--border: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--radius: 16px}body{margin:0;padding:0;font-family:Inter,system-ui,sans-serif;background-color:var(--bg-color);background-image:linear-gradient(to bottom,#f3f4f6,#e5e7eb);color:var(--text-main);min-height:100vh}*{box-sizing:border-box}.app-container{max-width:1200px;margin:0 auto;padding:20px;min-height:100vh;display:flex;flex-direction:column}.nav-bar{background:var(--card-bg);padding:15px 30px;border-radius:var(--radius);box-shadow:var(--shadow-sm);display:flex;justify-content:space-between;align-items:center;margin-bottom:30px}.logo{font-weight:800;font-size:1.2rem;color:var(--primary)}.nav-links a{text-decoration:none;color:var(--text-light);margin-left:15px;font-weight:500;padding:8px 12px;border-radius:8px;transition:all .2s ease}.nav-links a:hover,.nav-links a.active{color:var(--primary);background-color:#eef2ff}.page-center-wrapper{width:100%;padding-top:10px;display:block}.card{background:var(--card-bg);padding:30px;border-radius:20px;box-shadow:var(--shadow-md);border:1px solid white}.card h2{margin-top:0;font-size:1.5rem;margin-bottom:20px;color:var(--text-main)}.card h3{margin-top:0;font-size:1.1rem;color:#374151;margin-bottom:15px}input,textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:10px;font-size:1rem;margin-bottom:15px;background:#f9fafb;font-family:inherit}input:focus,textarea:focus{outline:none;border-color:var(--primary);background:#fff}button{width:100%;padding:12px;border:none;border-radius:10px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 4px 6px -1px #4f46e533}.btn-primary:hover{background-color:var(--primary-hover)}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text-light)}.btn-danger{background:#fee2e2;color:#dc2626}.dashboard-grid{display:grid;gap:25px;grid-template-columns:1fr;width:100%}.profile-grid{display:grid;grid-template-columns:1fr;gap:20px;width:100%}.stat-card{background:#f8fafc;padding:20px 10px;border-radius:12px;text-align:center;border:1px solid var(--border)}.stat-number{font-size:1.8rem;font-weight:700;color:var(--primary)}.stat-label{font-size:.8rem;color:var(--text-light);margin-top:5px}.card-settings{width:100%;max-width:600px;margin:0 auto}.auth-container{width:100%;max-width:400px;margin:40px auto}.review-item{background:#fdfdfd;border:1px solid var(--border);padding:15px;border-radius:12px;margin-bottom:15px}.review-actions{display:flex;gap:10px;margin-top:10px}@media(min-width:768px){.nav-bar{padding:15px 40px}.dashboard-grid{grid-template-columns:2.5fr 1fr;align-items:start}.section-add{order:2}.section-list{order:1}.profile-grid{width:100%;grid-template-columns:300px 1fr;align-items:start}}.page-center-wrapper{width:100%;display:block;padding-top:20px}.page-center-wrapper>.card{margin-left:auto!important;margin-right:auto!important;margin-top:20px}.auth-container,.page-center-wrapper>.card[style*="max-width: 400px"]{margin-left:auto!important;margin-right:auto!important}.calendar-wrapper{margin-top:30px;padding-top:20px;border-top:1px dashed var(--border)}.calendar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;padding:0 10px}.calendar-header button{width:auto!important;padding:6px 12px;margin:0;flex-shrink:0;font-size:.9rem}.calendar-title{font-weight:800;font-size:1.1rem;color:var(--text-main);white-space:nowrap;cursor:pointer;padding:0 10px}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center}.calendar-cell{height:40px;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:8px;cursor:pointer;font-size:.9rem;position:relative;transition:all .2s;color:var(--text-main);border:1px solid transparent;z-index:1}.calendar-cell:hover{background-color:#f1f5f9;border-color:#e2e8f0}.calendar-cell.selected{background-color:var(--primary);color:#fff!important;font-weight:700;box-shadow:0 4px 6px -1px #4f46e54d;opacity:1}.calendar-cell.selected:after{z-index:-1}.calendar-cell.is-today{color:var(--primary);font-weight:700}.calendar-cell.is-today:not(.selected){border:1px solid var(--primary)}.task-dot{width:4px;height:4px;background-color:#ef4444;border-radius:50%;position:absolute;bottom:4px}.task-dot.projected{background-color:#94a3b8}.calendar-cell.selected .task-dot{background-color:#fff}.settings-container{display:flex;gap:20px;min-height:400px}.settings-sidebar{flex:1;border-right:1px solid var(--border);padding-right:20px;display:flex;flex-direction:column;gap:10px}.profile-item{padding:12px;border-radius:8px;cursor:pointer;border:1px solid transparent;transition:all .2s;display:flex;justify-content:space-between;align-items:center}.profile-item:hover{background-color:#f1f5f9}.profile-item.active{background-color:#eef2ff;border-color:var(--primary);color:var(--primary);font-weight:600}.badge-default{font-size:.75rem;background:var(--primary);color:#fff;padding:2px 6px;border-radius:4px}.settings-content{flex:2;padding-left:10px}@media(max-width:768px){.settings-container{flex-direction:column}.settings-sidebar{border-right:none;border-bottom:1px solid var(--border);padding-bottom:20px;padding-right:0}.settings-content{padding-left:0}}select{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;background:#f9fafb;font-size:1rem;margin-bottom:15px;outline:none}.tag-selector{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:15px}.rule-tag{padding:6px 12px;border-radius:20px;border:1px solid var(--border);background:#fff;color:var(--text-light);font-size:.85rem;cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none}.rule-tag:hover{border-color:var(--primary);color:var(--primary)}.rule-tag.active{background-color:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 2px 4px #4f46e54d}.tag-label{font-size:.85rem;color:#666;display:block;margin-bottom:8px}.review-item{background:#fff;border:1px solid rgba(0,0,0,.04);padding:20px;border-radius:16px;margin-bottom:16px;position:relative;box-shadow:0 2px 8px #00000005;transition:all .2s ease}.review-item:hover{box-shadow:0 8px 16px #0000000f;transform:translateY(-2px)}.review-content{font-size:1rem;line-height:1.6;color:#333;margin-bottom:15px;padding-right:30px}.review-footer{display:flex;justify-content:space-between;align-items:center;margin-top:15px;padding-top:15px;border-top:1px solid #f5f5f7;height:40px}.mini-tag{display:inline-flex;align-items:center;justify-content:center;font-size:.75rem;padding:4px 8px;background:#f5f5f7;color:#86868b;border-radius:6px;font-weight:500;height:24px;white-space:nowrap}.action-row{display:flex;gap:12px}.icon-btn{width:44px;height:44px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s cubic-bezier(.25,.1,.25,1)}.icon-btn:active{transform:scale(.92)}.btn-forgot{background-color:#fff2f2;color:#ff3b30}.btn-forgot:hover{background-color:#ffe5e5;box-shadow:0 4px 10px #ff3b3033}.btn-remember{background-color:#f2fff4;color:#34c759}.btn-remember:hover{background-color:#e0fbe5;box-shadow:0 4px 10px #34c75933}.more-btn{position:absolute;top:15px;right:15px;width:32px!important;height:32px!important;background:transparent;border:none;color:#ccc;display:flex;align-items:center;justify-content:center;padding:0;cursor:pointer;border-radius:6px;transition:all .2s;z-index:2}.more-btn:hover{background-color:#f5f5f7;color:#333}.menu-dropdown{position:absolute;top:40px;right:15px;background:#fff;border-radius:12px;box-shadow:0 10px 30px #00000026;border:1px solid #eee;z-index:10;overflow:hidden;min-width:120px;animation:fadeIn .15s ease}.menu-item{padding:10px 15px;font-size:.9rem;color:#333;cursor:pointer;display:flex;align-items:center;gap:8px}.menu-item:hover{background-color:#f5f5f7}.menu-item.delete{color:#ff3b30}@keyframes fadeIn{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.modal-overlay{position:fixed;inset:0;background:#0000004d;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background:#fff;width:90%;max-width:500px;padding:30px;border-radius:24px;box-shadow:0 20px 40px #0003;animation:popUp .3s cubic-bezier(.18,.89,.32,1.28)}@keyframes popUp{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.btn-graduate{background-color:#f3e8ff;color:#702963;border:1px solid rgba(112,41,99,.1)}.btn-graduate:hover{background-color:#e9d5ff;box-shadow:0 4px 12px #7029634d;transform:scale(1.05)}.database-header{display:flex;flex-direction:column;gap:15px;margin-bottom:25px}.search-bar-wrapper{position:relative;width:100%;margin-bottom:0}.search-input{width:100%;height:46px;padding:0 12px 0 42px;border-radius:12px;margin-bottom:0!important;border:1px solid var(--border);background:#f1f5f9;font-size:.95rem;transition:all .2s;display:flex;align-items:center}.search-icon{position:absolute;top:50%;transform:translateY(-50%);left:14px;color:#94a3b8;z-index:10;pointer-events:none;width:18px;height:18px}.search-input:focus{background:#fff;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a;outline:none}.segmented-control{display:flex;background:#e2e8f0;padding:4px;border-radius:10px;width:fit-content}.segment-btn{padding:6px 16px;border-radius:8px;font-size:.85rem;font-weight:500;color:#64748b;cursor:pointer;transition:all .2s;border:none;background:transparent}.segment-btn.active{background:#fff;color:var(--text-main);box-shadow:0 2px 4px #0000001a}.empty-state{text-align:center;padding:60px 20px;color:#94a3b8}.history-section{margin-top:15px;padding-top:15px;border-top:1px dashed #f0f0f0;animation:slideDown .2s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.history-label{font-size:.75rem;color:#9ca3af;margin-bottom:10px;display:block}.history-tags-wrapper{display:flex;gap:6px;flex-wrap:wrap;align-items:center}.history-tag{display:inline-flex;align-items:center;justify-content:center;height:24px;padding:0 10px;border-radius:12px;font-size:.75rem;font-weight:600;font-family:SF Mono,Menlo,monospace;border:1px solid transparent;-webkit-user-select:none;user-select:none}.history-tag.correct{background-color:#dcfce7;color:#166534;border-color:#1665341a}.history-tag.wrong{background-color:#fee2e2;color:#991b1b;border-color:#991b1b1a}.history-tag.graduated{background-color:#f3e8ff;color:#6b21a8;border-color:#6b21a81a}.history-tag.start{background-color:#f3f4f6;color:#6b7280;border:1px solid #e5e7eb}.btn-toggle-history{background:transparent;border:1px solid transparent;font-size:.75rem;height:24px;line-height:1;color:#94a3b8;display:inline-flex;align-items:center;justify-content:center;gap:2px;padding:0 4px;width:auto;min-width:fit-content;flex-shrink:0;white-space:nowrap;cursor:pointer;transition:all .2s;border-radius:4px}.btn-toggle-history:hover{background-color:#f1f5f9;color:var(--primary)}.btn-toggle-history.active{background-color:#eef2ff;color:var(--primary);font-weight:500}.footer-info{display:flex;align-items:center;gap:8px;flex-wrap:nowrap}.rank-badge{display:inline-flex;align-items:center;justify-content:center;height:24px;padding:0 4px;border-radius:6px;font-family:SF Pro Display,-apple-system,BlinkMacSystemFont,sans-serif;font-weight:800;font-size:.75rem;letter-spacing:.5px;transition:all .3s cubic-bezier(.25,.8,.25,1);position:relative;overflow:hidden;-webkit-user-select:none;user-select:none}.rank-badge:hover{transform:translateY(-1px);filter:brightness(1.1)}.rank-stone{background-color:#f3f4f6;color:#9ca3af;border:1px solid #e5e7eb;box-shadow:inset 0 1px 2px #00000008}.rank-bronze{background:linear-gradient(135deg,#fff7ed,#ffedd5);color:#9a3412;border:1px solid #fed7aa;box-shadow:inset 0 1px #fffc,0 2px 4px #9a34121a}.rank-silver{background:linear-gradient(180deg,#fff,#f1f5f9 45%,#e2e8f0 50%,#f8fafc);color:#475569;border:1px solid #cbd5e1;box-shadow:0 2px 4px #0000000d,inset 0 0 0 1px #ffffff80;text-shadow:0 1px 0 rgba(255,255,255,.8)}.rank-gold{background:#1a1a1a;border:1px solid #854d0e;background-image:linear-gradient(to bottom,#fde047,#eab308);-webkit-background-clip:text;background-clip:text;color:transparent;box-shadow:0 4px 10px #eab30840}.rank-gold:hover{background-image:linear-gradient(to bottom,#fef08a,#ca8a04);box-shadow:0 4px 15px #eab30866}.rank-diamond{background:linear-gradient(135deg,#22d3ee,#3b82f6,#8b5cf6);color:#fff;border:none;text-shadow:0 1px 2px rgba(0,0,0,.2);box-shadow:0 0 15px #3b82f680,inset 0 0 0 1px #ffffff4d;animation:diamond-pulse 3s infinite alternate}.rank-diamond:after{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:linear-gradient(to right,#fff0,#fffc,#fff0);transform:rotate(30deg);animation:diamond-shine 4s infinite linear}@keyframes diamond-pulse{0%{box-shadow:0 0 10px #22d3ee66}to{box-shadow:0 0 20px #8b5cf6b3}}@keyframes diamond-shine{0%{left:-100%;top:-100%}30%{left:100%;top:100%}to{left:100%;top:100%}}