/* ═══ CSS Variables — Light & Dark Theme ═══ */
:root {
  --bg:#f5f6fa;--bg-page:#ebedf3;--surface:#fff;--surface2:#f0f1f5;--surface3:#e8eaf0;
  --border:#dcdfe6;--border-active:#5b6abf;--text:#1e2030;--text2:#5a5e72;--text3:#8b8fa3;
  --accent:#5b6abf;--accent-hover:#6e7dd6;--accent-soft:rgba(91,106,191,.08);
  --green:#22c55e;--green-bg:rgba(34,197,94,.08);--red:#ef4444;--red-bg:rgba(239,68,68,.08);
  --yellow:#eab308;--yellow-bg:rgba(234,179,8,.08);--blue:#3b82f6;--blue-bg:rgba(59,130,246,.08);
  --radius:12px;--radius-sm:8px;--shadow:0 1px 3px rgba(0,0,0,.06),0 4px 16px rgba(0,0,0,.04);
  --sidebar-w:240px;--header-h:56px;
}
[data-theme="dark"] {
  --bg:#0f1117;--bg-page:#0a0c12;--surface:#1a1d27;--surface2:#232733;--surface3:#2a2e3c;
  --border:#2e3345;--border-active:#5b6abf;--text:#e4e6ed;--text2:#9ca0b0;--text3:#6b7084;
  --accent:#6c7bf0;--accent-hover:#8490f7;--accent-soft:rgba(108,123,240,.06);
  --green:#4ade80;--green-bg:rgba(74,222,128,.08);--red:#f87171;--red-bg:rgba(248,113,113,.08);
  --yellow:#fbbf24;--yellow-bg:rgba(251,191,36,.08);--blue:#60a5fa;--blue-bg:rgba(96,165,250,.08);
  --shadow:0 4px 24px rgba(0,0,0,.3);
}

/* ═══ Reset & Base ═══ */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'SF Pro Text','Segoe UI',Roboto,'Helvetica Neue',sans-serif;background:var(--bg-page);color:var(--text);min-height:100vh;line-height:1.6;transition:background .3s,color .3s}

/* ═══ Layout ═══ */
.layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100;transition:transform .3s,background .3s}
.sidebar-brand{padding:20px 20px 16px;border-bottom:1px solid var(--border)}
.sidebar-brand h1{font-size:18px;font-weight:700;display:flex;align-items:center;gap:8px}
.sidebar-brand h1 span.logo{font-size:24px;display:inline-flex;align-items:center}
.sidebar-brand .tagline{font-size:12px;color:var(--text3);margin-top:2px}
.sidebar-nav{flex:1;padding:12px 10px;overflow-y:auto}
.sidebar-section{margin-bottom:16px}
.sidebar-section-title{font-size:11px;font-weight:600;color:var(--text3);text-transform:uppercase;letter-spacing:.5px;padding:6px 12px}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:14px;color:var(--text2);transition:all .15s;user-select:none;margin-bottom:2px}
.nav-item:hover{background:var(--surface2);color:var(--text)}
.nav-item.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.nav-item .nav-icon{font-size:18px;width:24px;text-align:center;display:inline-flex;align-items:center;justify-content:center}
.nav-item .nav-icon svg{display:block;flex-shrink:0}
.nav-item .nav-badge{margin-left:auto;font-size:10px;padding:2px 7px;border-radius:10px;background:var(--accent-soft);color:var(--accent);font-weight:600}
.sidebar-footer{padding:12px 10px;border-top:1px solid var(--border)}

/* Theme toggle */
.theme-toggle{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;color:var(--text2);transition:all .15s}
.theme-toggle:hover{background:var(--surface2);color:var(--text)}
.toggle-track{width:40px;height:22px;border-radius:11px;background:var(--border);position:relative;transition:background .3s;margin-left:auto}
.toggle-thumb{width:18px;height:18px;border-radius:50%;background:#fff;position:absolute;top:2px;left:2px;transition:transform .3s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
[data-theme="dark"] .toggle-track{background:var(--accent)}
[data-theme="dark"] .toggle-thumb{transform:translateX(18px)}

/* Main */
.main-area{margin-left:var(--sidebar-w);flex:1;min-height:100vh}
.topbar{height:var(--header-h);background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 28px;position:sticky;top:0;z-index:50;gap:12px;transition:background .3s}
.topbar-title{font-size:16px;font-weight:600}
.topbar-breadcrumb{font-size:13px;color:var(--text3)}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.hamburger{display:none;background:none;border:none;cursor:pointer;font-size:22px;color:var(--text);padding:4px}
.content{max-width:1400px;margin:0 auto;padding:24px 32px 80px}

/* ═══ Components ═══ */
.steps{display:flex;gap:8px;margin-bottom:28px;justify-content:center;flex-wrap:wrap}
.step-dot{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:20px;font-size:13px;font-weight:500;color:var(--text3);background:var(--surface);border:1px solid var(--border);transition:all .3s}
.step-dot.active{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.step-dot.done{color:var(--green);border-color:rgba(34,197,94,.3);background:var(--green-bg)}
.step-num{width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;background:var(--surface2)}
.step-dot.active .step-num{background:var(--accent);color:#fff}
.step-dot.done .step-num{background:var(--green);color:#fff}

.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:20px;transition:all .3s;box-shadow:var(--shadow)}
.card.hidden{display:none}
.card-title{font-size:16px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.card-title .icon{font-size:20px}

.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:all .2s;position:relative}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent);background:var(--accent-soft)}
.upload-zone .icon{font-size:40px;margin-bottom:12px}
.upload-zone .main-text{font-size:15px;color:var(--text);margin-bottom:4px}
.upload-zone .sub-text{font-size:13px;color:var(--text3)}
.upload-zone input{display:none}

.file-info{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--surface2);border-radius:var(--radius-sm);margin-top:16px}
.file-info .name{flex:1;font-weight:500;font-size:14px}
.file-info .meta{color:var(--text3);font-size:13px}
.file-info .remove{color:var(--text3);cursor:pointer;font-size:18px;padding:4px;border-radius:4px;transition:all .2s}
.file-info .remove:hover{color:var(--red);background:var(--red-bg)}

.form-group{margin-bottom:16px}
.form-label{display:block;font-size:13px;font-weight:500;color:var(--text2);margin-bottom:6px}
select,input[type="text"]{width:100%;padding:10px 14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:14px;outline:none;transition:border-color .2s}
select:focus,input[type="text"]:focus{border-color:var(--accent)}
select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ca0b0'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}
textarea{width:100%;min-height:140px;padding:12px 14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:13px;font-family:'SF Mono','Fira Code','Consolas',monospace;outline:none;resize:vertical;line-height:1.7;transition:border-color .2s}
textarea:focus{border-color:var(--accent)}
textarea::placeholder{color:var(--text3)}
.val-count{font-size:12px;color:var(--text3);margin-top:4px;text-align:right}
.val-count span{color:var(--accent);font-weight:600}

.column-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.column-pill{padding:6px 14px;border-radius:16px;font-size:13px;background:var(--surface2);border:1px solid var(--border);cursor:pointer;transition:all .2s;user-select:none}
.column-pill:hover{border-color:var(--accent)}
.column-pill.selected{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:500}

.quick-fill-row{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.quick-btn{padding:8px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;border:1px solid var(--border);background:var(--surface2);color:var(--text2);cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:6px}
.quick-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.quick-btn .badge{font-size:11px;padding:1px 6px;border-radius:8px;background:var(--border);color:var(--text3)}
.quick-btn:hover .badge{background:rgba(91,106,191,.15);color:var(--accent)}

/* Toast */
.toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 20px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);color:var(--text);display:flex;align-items:center;gap:8px;animation:slideIn .3s ease;max-width:360px}
.toast.info{border-left:3px solid var(--blue)}
.toast.success{border-left:3px solid var(--green)}
.toast.warning{border-left:3px solid var(--yellow)}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideOut{from{opacity:1}to{opacity:0;transform:translateX(20px)}}

/* Table */
.table-wrap{overflow-x:auto;border-radius:var(--radius-sm);border:1px solid var(--border);margin-top:16px;max-height:460px;overflow-y:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{position:sticky;top:0;background:var(--surface2);padding:10px 14px;text-align:left;font-weight:600;color:var(--text2);border-bottom:1px solid var(--border);white-space:nowrap;z-index:1}
td{padding:8px 14px;border-bottom:1px solid var(--border);white-space:nowrap}
tr:last-child td{border-bottom:none}
th.col-orig{background:var(--surface2)}
th.col-new{background:rgba(91,106,191,.1);color:var(--accent)}
td.cell-orig{color:var(--text3)}
td.cell-new-changed{background:var(--green-bg);color:var(--green);font-weight:500}
td.cell-new-unreplaced{background:var(--yellow-bg);color:var(--yellow);font-weight:500}
td.cell-new-same{color:var(--text3)}

/* Buttons */
.btn-row{display:flex;gap:12px;margin-top:20px;justify-content:flex-end;flex-wrap:wrap}
.btn{padding:10px 24px;border-radius:var(--radius-sm);font-size:14px;font-weight:500;border:none;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:6px}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover:not(:disabled){background:var(--accent-hover)}
.btn-secondary{background:var(--surface2);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover:not(:disabled){background:var(--surface3)}
.btn-success{background:var(--green);color:#fff}
[data-theme="dark"] .btn-success{color:#111}
.btn-success:hover{filter:brightness(1.1)}

/* Mapping */
.mapping-list{margin-top:12px}
.mapping-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:6px;font-size:13px;font-family:'SF Mono','Fira Code',monospace}
.mapping-item.ok{background:var(--green-bg)}
.mapping-item.fail{background:var(--red-bg)}
.mapping-arrow{color:var(--text3)}
.mapping-new{color:var(--green);font-weight:600}
.mapping-fail{color:var(--red);font-weight:600}
.mapping-count{margin-left:auto;font-size:12px;color:var(--text3);font-family:-apple-system,BlinkMacSystemFont,sans-serif}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:20px}
.stat-box{padding:16px;background:var(--surface2);border-radius:var(--radius-sm);text-align:center}
.stat-val{font-size:24px;font-weight:700;margin-bottom:2px}
.stat-label{font-size:12px;color:var(--text3)}
.stat-val.green{color:var(--green)}.stat-val.red{color:var(--red)}.stat-val.yellow{color:var(--yellow)}

.warning-box{display:flex;align-items:flex-start;gap:10px;padding:12px 16px;background:var(--yellow-bg);border:1px solid rgba(234,179,8,.2);border-radius:var(--radius-sm);margin-top:16px;font-size:13px;color:var(--yellow)}
.legend{display:flex;gap:16px;margin-top:12px;font-size:12px;color:var(--text3);flex-wrap:wrap}
.legend-item{display:flex;align-items:center;gap:5px}
.legend-dot{width:10px;height:10px;border-radius:3px}
.legend-dot.green{background:var(--green)}.legend-dot.yellow{background:var(--yellow)}.legend-dot.gray{background:var(--text3)}

.fade-in{animation:fadeIn .4s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text3)}

/* ═══ Text Tool ═══ */
.text-tool-area{width:100%;min-height:280px;padding:14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:13px;font-family:'SF Mono','Fira Code','Consolas',monospace;outline:none;resize:vertical;line-height:1.7;transition:border-color .2s}
.text-tool-area:focus{border-color:var(--accent)}
.tool-actions{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.tool-action-btn{padding:8px 16px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;border:1px solid var(--border);background:var(--surface2);color:var(--text2);cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:6px}
.tool-action-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.text-stats-bar{display:flex;gap:20px;padding:10px 16px;background:var(--surface2);border-radius:var(--radius-sm);font-size:12px;color:var(--text3);flex-wrap:wrap;margin-top:12px}
.text-stats-bar span{display:flex;align-items:center;gap:4px}
.text-stats-bar .val{color:var(--accent);font-weight:600}

/* ═══ JSON Tool ═══ */
.json-panels{display:grid;grid-template-columns:1fr;gap:16px}
.json-panels.dual{grid-template-columns:1fr 1fr}
@media(max-width:768px){.json-panels.dual{grid-template-columns:1fr}}
.json-panel{position:relative}
.json-panel-label{font-size:12px;font-weight:600;color:var(--text3);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}
.json-textarea{width:100%;min-height:300px;padding:14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:13px;font-family:'SF Mono','Fira Code','Consolas',monospace;outline:none;resize:vertical;line-height:1.7;transition:border-color .2s;tab-size:2}
.json-textarea:focus{border-color:var(--accent)}
.json-error{margin-top:6px;padding:8px 12px;background:var(--red-bg);border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-sm);font-size:12px;color:var(--red);display:none;font-family:'SF Mono','Fira Code',monospace}
.json-mode-tabs{display:flex;gap:4px;margin-bottom:20px;padding:4px;background:var(--surface2);border-radius:var(--radius-sm);width:fit-content}
.json-mode-tab{padding:8px 20px;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s;color:var(--text3);user-select:none}
.json-mode-tab:hover{color:var(--text)}
.json-mode-tab.active{background:var(--surface);color:var(--accent);box-shadow:0 1px 4px rgba(0,0,0,.08);font-weight:600}

/* Diff */
.diff-result{margin-top:16px;max-height:500px;overflow-y:auto}
.diff-item{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:6px;font-size:13px;font-family:'SF Mono','Fira Code',monospace;border:1px solid var(--border)}
.diff-item.added{background:var(--green-bg);border-color:rgba(34,197,94,.2)}
.diff-item.removed{background:var(--red-bg);border-color:rgba(239,68,68,.2)}
.diff-item.changed{background:var(--yellow-bg);border-color:rgba(234,179,8,.2)}
.diff-item.type-changed{background:var(--blue-bg);border-color:rgba(59,130,246,.2)}
.diff-badge{padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;white-space:nowrap;flex-shrink:0}
.diff-badge.added{background:var(--green);color:#fff}
.diff-badge.removed{background:var(--red);color:#fff}
.diff-badge.changed{background:var(--yellow);color:#000}
.diff-badge.type-changed{background:var(--blue);color:#fff}
.diff-path{color:var(--text2);font-weight:500;flex:1;word-break:break-all}
.diff-detail{color:var(--text3);font-size:12px;margin-top:4px;word-break:break-all}
.diff-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-bottom:16px}
.diff-stat{padding:14px;background:var(--surface2);border-radius:var(--radius-sm);text-align:center}
.diff-stat-val{font-size:22px;font-weight:700}
.diff-stat-label{font-size:11px;color:var(--text3);margin-top:2px}

/* ═══ Responsive ═══ */
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main-area{margin-left:0}
  .hamburger{display:block}
  .content{padding:20px 16px 60px}
  .sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:99}
  .sidebar-overlay.show{display:block}
}

/* ═══ Custom Input Modal ═══ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:10000;display:flex;align-items:center;justify-content:center;animation:modalFadeIn .2s ease}
@keyframes modalFadeIn{from{opacity:0}to{opacity:1}}
.modal-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;width:90%;max-width:420px;box-shadow:0 12px 40px rgba(0,0,0,.2);animation:modalSlideIn .25s ease}
@keyframes modalSlideIn{from{opacity:0;transform:translateY(-20px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.modal-title{font-size:16px;font-weight:600;margin-bottom:16px;color:var(--text)}
.modal-input{width:100%;padding:11px 14px;background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:14px;outline:none;transition:border-color .2s}
.modal-input:focus{border-color:var(--accent)}
.modal-btns{display:flex;gap:10px;margin-top:20px;justify-content:flex-end}
.modal-cancel-btn{min-width:72px}
.modal-confirm-btn{min-width:72px}

/* ═══ Cron Tool ═══ */
.cron-mode-switch{display:flex;gap:0;margin-bottom:20px;border:1.5px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;width:fit-content}
.cron-mode-btn{display:flex;align-items:center;gap:8px;padding:10px 24px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;color:var(--text3);background:var(--surface2);border:none;outline:none;position:relative;user-select:none}
.cron-mode-btn:first-child{border-right:1.5px solid var(--border)}
.cron-mode-btn:hover{color:var(--text);background:var(--surface)}
.cron-mode-btn.active{background:var(--accent);color:#fff;font-weight:600}
.cron-mode-btn.active svg{stroke:#fff}
.cron-mode-btn svg{transition:stroke .2s}
.cron-gen-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.cron-field{position:relative}
.cron-field input{font-family:'SF Mono','Fira Code',monospace;font-size:14px;text-align:center}
.cron-hint{font-size:11px;color:var(--text3);margin-top:2px}
.cron-presets{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.cron-result-box{padding:16px;background:var(--surface2);border-radius:var(--radius-sm);border:1px solid var(--border)}
.cron-expr-display{font-family:'SF Mono','Fira Code',monospace;font-size:20px;font-weight:700;color:var(--accent);padding:12px;background:var(--surface);border-radius:var(--radius-sm);text-align:center;letter-spacing:3px;border:1px solid var(--border)}
.cron-desc{margin-top:8px;font-size:14px;color:var(--text2);text-align:center}
.cron-next-list{font-family:'SF Mono','Fira Code',monospace;font-size:13px;line-height:2;color:var(--text2)}
.cron-parse-detail{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:13px}
.cron-parse-detail .cron-field-name{font-weight:600;color:var(--text)}
.cron-parse-detail .cron-field-val{font-family:'SF Mono','Fira Code',monospace;color:var(--accent)}

/* ═══ Random Data Tool ═══ */
.rand-config-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-bottom:16px}
.rand-check{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text2);cursor:pointer;padding:6px 12px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface2);transition:all .2s;user-select:none;margin-right:4px;margin-bottom:4px}
.rand-check:hover{border-color:var(--accent);color:var(--accent)}
.rand-check input[type="checkbox"]{accent-color:var(--accent);width:15px;height:15px}

/* ═══ Subnet Tool ═══ */
.subnet-opts{display:flex;flex-wrap:wrap;gap:4px;margin-top:12px}
.subnet-info-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px}
.subnet-info-item{display:flex;justify-content:space-between;padding:8px 12px;background:var(--surface);border-radius:var(--radius-sm);font-size:13px}
.subnet-info-item .label{color:var(--text3)}
.subnet-info-item .value{font-family:'SF Mono','Fira Code',monospace;font-weight:600;color:var(--text)}

/* ═══ Codec Tool ═══ */
.codec-type-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:8px;margin-bottom:16px}
.codec-type-card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 8px;background:var(--surface2);border:1.5px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s;user-select:none}
.codec-type-card:hover{border-color:var(--accent);background:var(--accent-soft)}
.codec-type-card.active{border-color:var(--accent);background:var(--accent-soft);box-shadow:0 0 0 2px rgba(91,106,191,.15)}
.codec-type-icon{font-size:22px}
.codec-type-name{font-size:12px;font-weight:600;color:var(--text2)}
.codec-type-card.active .codec-type-name{color:var(--accent)}
.codec-desc{font-size:13px;color:var(--text3);margin-bottom:16px;padding:10px 14px;background:var(--surface2);border-radius:var(--radius-sm);border-left:3px solid var(--accent)}
.codec-label-row{display:flex;align-items:center;justify-content:space-between}
.codec-swap-btn{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface2);color:var(--text3);font-size:12px;font-weight:500;cursor:pointer;transition:all .2s}
.codec-swap-btn:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.codec-swap-btn svg{stroke:currentColor}
.codec-action-row{display:flex;gap:12px;justify-content:center}
.codec-hash-btn.active{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);font-weight:600}