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a{color:rgba(255,255,255,0.6);text-decoration:none;transition:color 0.2s}nav.breadcrumb a:hover{color:#fff;text-decoration:underline}nav.breadcrumb span{color:rgba(255,255,255,0.5);margin:0 6px}.container{max-width:560px;width:100%;margin:0 auto;padding:24px;flex:1}.container-lg{max-width:800px}.container-xl{max-width:1100px}main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}.subtitle{color:rgba(255,255,255,0.6);font-size:0.95rem;margin-bottom:24px;line-height:1.5}.hint{margin-top:16px;font-size:0.85rem;color:rgba(255,255,255,0.65);text-align:center}button{font-family:inherit;transition:all 0.2s ease;cursor:pointer}button:disabled{opacity:0.5;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:2px solid #667eea;outline-offset:2px}button:focus,a:focus,input:focus,textarea:focus,select:focus{outline:2px solid #667eea;outline-offset:2px}.btn,.btn-primary{padding:12px 28px;border:none;border-radius:8px;font-size:1rem;font-weight:600;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;box-shadow:0 4px 12px rgba(102,126,234,0.3)}.btn:hover:not(:disabled),.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 16px rgba(102,126,234,0.4)}.btn:active:not(:disabled),.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-lg{padding:14px 40px;font-size:1.1rem;border-radius:30px}.btn-secondary{background:rgba(255,255,255,0.1);color:#fff;border:1px solid rgba(255,255,255,0.15)}.btn-secondary:hover:not(:disabled){background:rgba(255,255,255,0.15)}.btn-group{display:flex;gap:4px;background:rgba(255,255,255,0.04);border-radius:8px;padding:4px;width:fit-content}.btn-group .btn{background:transparent;color:rgba(255,255,255,0.6);padding:8px 16px;font-size:0.9rem;border:none;box-shadow:none;border-radius:6px;margin:0}.btn-group .btn.active{background:#667eea;color:#fff}.btn-group .btn:hover:not(.active){color:#ccc;transform:none}.preset,.preset-btn,.option-btn{padding:8px 16px;border:1px solid rgba(255,255,255,0.15);border-radius:20px;background:rgba(255,255,255,0.04);color:#fff;font-size:0.85rem;cursor:pointer;transition:all 0.2s}.preset:hover,.preset-btn:hover,.option-btn:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.25)}.preset.active,.preset-btn.active,.option-btn.active{border-color:#667eea;background:rgba(102,126,234,0.2);color:#667eea}input,textarea,select{font-family:inherit;font-size:1rem}input[type="text"],input[type="email"],input[type="number"],input[type="password"],input[type="search"],textarea,select{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:8px;color:#fff;padding:12px 14px;transition:all 0.2s}input[type="text"]:focus,input[type="email"]:focus,input[type="number"]:focus,input[type="password"]:focus,input[type="search"]:focus,textarea:focus,select:focus{outline:none;border-color:#667eea;background:rgba(102,126,234,0.08);box-shadow:0 0 0 3px rgba(102,126,234,0.1)}textarea{resize:vertical;min-height:120px;font-family:'Courier New',monospace}input::placeholder,textarea::placeholder{color:rgba(255,255,255,0.55)}.form-group{margin-bottom:20px;display:flex;flex-direction:column}label{font-size:0.9rem;font-weight:600;color:#ccc;margin-bottom:8px;text-transform:uppercase;letter-spacing:0.5px;display:block}label[aria-required="true"]::after{content:" *";color:#f87171}fieldset{border:1px solid rgba(255,255,255,0.1);border-radius:8px;padding:16px;margin-bottom:24px}legend{font-size:1rem;font-weight:600;color:#fff;padding:0 8px}input:invalid{border-color:#f87171}input[aria-invalid="true"]{border-color:#f87171}input[aria-invalid="true"]+.error-message{color:#f87171;font-size:0.85rem;margin-top:4px}.error-message{display:none;color:#f87171;font-size:0.85rem;margin-top:4px;min-height:20px}.result,.result-box,.display-box{margin-top:20px;padding:24px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.06);border-radius:12px;text-align:center}.result-value,.answer{font-size:2.5rem;font-weight:800;color:#667eea;margin-bottom:8px}.result-label,.explain{font-size:0.9rem;color:rgba(255,255,255,0.6)}.large-display{font-size:5rem;font-weight:200;font-variant-numeric:tabular-nums;letter-spacing:-0.05em}@media (max-width:500px){.large-display{font-size:3.5rem}}.tabs{display:flex;gap:6px;margin-bottom:24px;background:rgba(255,255,255,0.04);border-radius:12px;padding:4px}.tab{flex:1;padding:10px 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rgba(102,126,234,0.4);border-radius:6px;padding:4px 8px;font-family:'Monaco','Menlo',monospace;font-size:0.85rem;font-weight:600;color:#667eea;white-space:nowrap;min-width:60px;text-align:center}.shortcut-item span{color:rgba(255,255,255,0.7);flex:1}.modal-content{background:#12122a;border-radius:12px;padding:24px;max-width:500px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,0.5)}.modal-header{margin-bottom:16px;display:flex;justify-content:space-between;align-items:center}.modal-close{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:0}.modal-close:hover{color:#667eea}.modal-body{margin-bottom:20px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:rgba(46,204,113,0.9);color:#fff;padding:12px 20px;border-radius:8px;font-size:0.9rem;z-index:1001;animation:slideUp 0.3s ease-out}.toast.error{background:rgba(231,76,60,0.9)}.toast.warning{background:rgba(241,196,15,0.9)}.toast.info{background:rgba(102,126,234,0.9)}@keyframes slideUp{from{transform:translateX(-50%) translateY(100px);opacity:0}to{transform:translateX(-50%) translateY(0);opacity:1}}@keyframes fadeOut{from{opacity:1}to{opacity:0}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.5}}@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}@keyframes slideInLeft{from{transform:translateX(-20px);opacity:0}to{transform:translateX(0);opacity:1}}@keyframes 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(max-width:768px){.theme-toggle{bottom:16px;right:16px;width:44px;height:44px;font-size:20px}}.text-primary{color:#667eea}.text-success{color:#2ecc71}.text-danger{color:#e74c3c}.text-warning{color:#f39c12}.text-muted{color:rgba(255,255,255,0.5)}.bg-primary{background:rgba(102,126,234,0.1)}.bg-success{background:rgba(46,204,113,0.1)}.bg-danger{background:rgba(231,76,60,0.1)}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}.p-1{padding:8px}.p-2{padding:16px}.p-3{padding:24px}.p-4{padding:32px}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.gap-1{gap:8px}.gap-2{gap:16px}.gap-3{gap:24px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}[aria-hidden="true"]{pointer-events:none}*:focus-visible{outline:2px 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print{nav.breadcrumb{display:none}button{display:none}}.input-error{border-color:#ef4444 !important;border-width:2px;box-shadow:0 0 0 3px rgba(239,68,68,0.1);background:rgba(239,68,68,0.02)}.input-error:focus{outline-color:#ef4444;box-shadow:0 0 0 3px rgba(239,68,68,0.15)}.error-text{display:block;color:#ef4444;font-size:0.85rem;margin-top:6px;font-weight:500;animation:slideDown 0.2s ease}@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.form-error{background:rgba(239,68,68,0.08);border:2px solid #ef4444;border-radius:8px;color:#ef4444;padding:14px 16px;margin-bottom:20px;font-size:0.95rem;font-weight:500;display:none;animation:slideDown 0.2s ease}.form-error[style*="display:block"]{display:block}.input-success{border-color:#22c55e;background:rgba(34,197,94,0.02);box-shadow:0 0 0 3px rgba(34,197,94,0.1)}.input-success:focus{outline-color:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,0.15)}.success-text{color:#22c55e;font-size:0.85rem;margin-top:6px;font-weight:500}.error-notification{position:fixed;bottom:20px;right:20px;background:#ef4444;color:white;padding:14px 18px;border-radius:8px;box-shadow:0 8px 24px rgba(239,68,68,0.4);z-index:9999;opacity:0;transform:translateY(20px);transition:all 0.3s ease;max-width:400px;font-weight:500}.error-notification.show{opacity:1;transform:translateY(0)}.warning-notification{position:fixed;bottom:20px;right:20px;background:#f59e0b;color:white;padding:14px 18px;border-radius:8px;box-shadow:0 8px 24px rgba(245,158,11,0.4);z-index:9999;opacity:0;transform:translateY(20px);transition:all 0.3s ease;max-width:400px;font-weight:500}.warning-notification.show{opacity:1;transform:translateY(0)}.success-notification{position:fixed;bottom:20px;right:20px;background:#22c55e;color:white;padding:14px 18px;border-radius:8px;box-shadow:0 8px 24px rgba(34,197,94,0.4);z-index:9999;opacity:0;transform:translateY(20px);transition:all 0.3s ease;max-width:400px;font-weight:500}.success-notification.show{opacity:1;transform:translateY(0)}@media (max-width:600px){.error-notification,.warning-notification,.success-notification{left:12px;right:12px;bottom:20px;max-width:none}}fieldset:disabled,fieldset[aria-disabled="true"]{opacity:0.6;pointer-events:none}input:disabled,textarea:disabled,button:disabled{opacity:0.5;cursor:not-allowed}.is-loading,.btn.is-loading{position:relative;color:transparent;pointer-events:none}.is-loading::after,.btn.is-loading::after{content:'';position:absolute;width:16px;height:16px;top:50%;left:50%;margin-left:-8px;margin-top:-8px;border:2px solid currentColor;border-radius:50%;border-top-color:transparent;animation:spin 0.6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}input:invalid:not(:placeholder-shown){border-color:#ef4444}input:valid:not(:placeholder-shown){border-color:#22c55e}.tooltip{position:relative;cursor:help;border-bottom:1px dotted rgba(255,255,255,0.3)}.tooltip::after{content:attr(data-tooltip);position:absolute;background:rgba(0,0,0,0.8);color:white;padding:6px 10px;border-radius:4px;font-size:0.8rem;white-space:nowrap;bottom:125%;left:50%;transform:translateX(-50%);opacity:0;pointer-events:none;transition:opacity 0.2s;z-index:100}.tooltip:hover::after{opacity:1}