.kfb-mask{position:fixed;inset:0;z-index:1000;background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;padding:var(--space-4)}.kfb-card{width:100%;max-width:420px;background:var(--surface-raised);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-6);box-sizing:border-box}.kfb-head{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-3);margin-bottom:var(--space-3)}.kfb-title{margin:0;font:var(--h3);color:var(--text)}.kfb-close{flex:none;display:inline-flex;align-items:center;justify-content:center;padding:var(--space-1);background:transparent;border:none;border-radius:var(--radius-md);color:var(--text-subtle);cursor:pointer}.kfb-close:hover{color:var(--text);background:var(--surface-sunken)}.kfb-desc{margin:0 0 var(--space-5);font:var(--body);color:var(--text-muted)}.kfb-field{margin-bottom:var(--space-4)}.kfb-label{display:block;margin-bottom:var(--space-2);font:var(--caption);color:var(--text-muted)}.kfb-dd{position:relative}.kfb-dd-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding:var(--space-3) var(--space-4);background:var(--surface-sunken);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text);font:var(--body);text-align:left;cursor:pointer}.kfb-dd-btn:hover{border-color:var(--border-strong)}.kfb-dd-btn.open{border-color:var(--brand)}.kfb-dd-btn.placeholder,.kfb-dd-caret{color:var(--text-subtle)}.kfb-dd-caret{flex:none;transition:transform .15s ease}.kfb-dd-btn.open .kfb-dd-caret{transform:rotate(180deg)}.kfb-dd-menu{position:absolute;top:calc(100% + var(--space-1));left:0;right:0;z-index:5;margin:0;padding:var(--space-1);list-style:none;background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);max-height:280px;overflow-y:auto}.kfb-dd-item{width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);padding:var(--space-3);background:transparent;border:none;border-radius:var(--radius-md);color:var(--text);font:var(--body);text-align:left;cursor:pointer}.kfb-dd-item:hover{background:var(--surface-sunken)}.kfb-dd-check,.kfb-dd-item.active{color:var(--brand)}.kfb-dd-check{flex:none}.kfb-textarea{width:100%;box-sizing:border-box;min-height:120px;resize:vertical;padding:var(--space-3) var(--space-4);background:var(--surface-sunken);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text);font:var(--body)}.kfb-textarea:focus{outline:none;border-color:var(--brand)}.kfb-textarea::-moz-placeholder{color:var(--text-subtle)}.kfb-textarea::placeholder{color:var(--text-subtle)}.kfb-input{width:100%;box-sizing:border-box;padding:var(--space-3) var(--space-4);background:var(--surface-sunken);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text);font:var(--body)}.kfb-input:focus{outline:none;border-color:var(--brand)}.kfb-input.invalid,.kfb-input.invalid:focus{border-color:var(--red)}.kfb-input::-moz-placeholder{color:var(--text-subtle)}.kfb-input::placeholder{color:var(--text-subtle)}.kfb-help{margin:var(--space-2) 0 0;font:var(--caption);color:var(--text-subtle)}.kfb-help.err{color:var(--red)}.kfb-foot{display:flex;align-items:center;justify-content:flex-end;gap:var(--space-3);margin-top:var(--space-5)}.kfb-status{margin-right:auto;font:var(--caption)}.kfb-status.err{color:var(--red)}.kfb-submit{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-3) var(--space-5);background:var(--brand);border:1px solid var(--brand);border-radius:var(--radius-md);color:#fff;font:var(--body);font-weight:600;cursor:pointer}.kfb-submit:hover{background:var(--brand-deep);border-color:var(--brand-deep)}.kfb-submit:disabled{opacity:.5;cursor:not-allowed}.kfb-success{display:flex;flex-direction:column;align-items:center;text-align:center;padding:var(--space-4) 0 var(--space-2);gap:var(--space-3)}.kfb-success-icon{display:inline-flex;align-items:center;justify-content:center;color:var(--brand)}.kfb-success-title{margin:0;font:var(--h3);color:var(--text)}.kfb-success-desc{margin:0 0 var(--space-2);font:var(--body);color:var(--text-muted)}html.dark .kfb-card{background:#161620;border-color:hsla(0,0%,100%,.08)}html.dark .kfb-success-title,html.dark .kfb-title{color:#f0f0f5}html.dark .kfb-desc,html.dark .kfb-label,html.dark .kfb-success-desc{color:#e0e0ea}html.dark .kfb-close{color:#a0a0b8}html.dark .kfb-close:hover{color:#f0f0f5;background:#1c1c28}html.dark .kfb-dd-btn,html.dark .kfb-input,html.dark .kfb-textarea{background:#0b0b14;border-color:hsla(0,0%,100%,.08);color:#f0f0f5}html.dark .kfb-dd-btn:hover{border-color:hsla(0,0%,100%,.14)}html.dark .kfb-input::-moz-placeholder,html.dark .kfb-textarea::-moz-placeholder{color:#a0a0b8}html.dark .kfb-dd-btn.placeholder,html.dark .kfb-dd-caret,html.dark .kfb-help,html.dark .kfb-input::placeholder,html.dark .kfb-textarea::placeholder{color:#a0a0b8}html.dark .kfb-dd-menu{background:#161620;border-color:hsla(0,0%,100%,.08)}html.dark .kfb-dd-item{color:#f0f0f5}html.dark .kfb-dd-item:hover{background:#1c1c28}