/* ============ tokens ============ */
:root{
  --bg:#F6F7F9;
  --surface:#FFFFFF;
  --line:#E4E7EC;
  --line-soft:#EEF1F4;
  --ink:#101828;
  --muted:#667085;
  --primary:#0F766E;
  --primary-dark:#0B5B55;
  --primary-soft:#E7F2F0;
  --amber:#F59E0B;
  --amber-soft:#FEF6E7;
  --amber-ink:#7A4A00;
  --danger:#B42318;
  --danger-soft:#FEF3F2;
  --dark:#1F2430;
  --shadow:0 1px 2px rgba(16,24,40,.06);
  --shadow-md:0 8px 24px rgba(16,24,40,.08);
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}

html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg);
  color:var(--ink);
  font-family:'IBM Plex Sans Arabic',system-ui,-apple-system,'Segoe UI',Tahoma,sans-serif;
  font-size:15px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.font-display{
  font-family:'Tajawal','IBM Plex Sans Arabic',system-ui,sans-serif;
  font-weight:700;
  margin:0;
  line-height:1.35;
}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 16px;border-radius:var(--r-sm);
  border:1px solid transparent;background:transparent;
  font-weight:600;font-size:15px;white-space:nowrap;
  transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s,opacity .15s;
}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--primary);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover:not(:disabled){background:var(--primary-dark)}
.btn-primary:active:not(:disabled){transform:translateY(1px)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover:not(:disabled){background:#F9FAFB;border-color:#D0D5DD}
.btn-ghost.danger{color:var(--danger);border-color:#F3D6D3}
.btn-ghost.danger:hover:not(:disabled){background:var(--danger-soft)}
.btn-sm{min-height:38px;padding:0 12px;font-size:13.5px;border-radius:9px;gap:6px}
.btn-xs{min-height:30px;padding:0 10px;font-size:12.5px;border-radius:8px;gap:5px}
.btn-lg{min-height:48px;padding:0 24px;font-size:16px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:9px;border:1px solid transparent;
  background:transparent;color:var(--muted);transition:background-color .15s,color .15s;
}
.icon-btn:hover{background:#F2F4F7;color:var(--ink)}

/* ============ topbar ============ */
.topbar{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1460px;margin:0 auto;padding:10px 20px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  background:var(--primary);color:#fff;
  display:grid;place-items:center;
  font-family:'Tajawal',sans-serif;font-weight:800;font-size:20px;
  box-shadow:0 2px 6px rgba(15,118,110,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-family:'Tajawal',sans-serif;font-size:16.5px;font-weight:700;letter-spacing:0}
.brand-text span{font-size:11.5px;color:var(--muted)}
.topbar-actions{display:flex;align-items:center;gap:8px}
.only-mobile{display:none}

/* ============ notice bar ============ */
.notice-bar{
  display:flex;align-items:center;justify-content:center;gap:7px;
  padding:7px 18px;font-size:12.5px;line-height:1.5;
  background:var(--amber-soft);color:var(--amber-ink);
  border-bottom:1px solid #F3E3BE;
  text-align:center;
}
.notice-bar svg{flex:0 0 auto;opacity:.85}

/* ============ shell ============ */
.shell{
  max-width:1460px;margin:0 auto;padding:20px;
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;align-items:start;
}
.main-col{display:flex;flex-direction:column;gap:20px;min-width:0}

/* ============ composer ============ */
.composer{
  background-color:var(--surface);
  background-image:radial-gradient(#E4E7EC 1px,transparent 1px);
  background-size:18px 18px;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow);
  padding:20px;
  display:flex;flex-direction:column;gap:14px;
}
.composer-head{display:flex;flex-direction:column;gap:4px}
.composer-title{font-size:22px}
.composer-sub{margin:0;font-size:13.5px;color:var(--muted);max-width:64ch}

.idea-field{position:relative}
.idea-field textarea{
  width:100%;min-height:112px;resize:vertical;
  padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);font-size:16px;line-height:1.7;
  transition:border-color .15s,box-shadow .15s;
}
.idea-field textarea::placeholder{color:#98A2B3;font-size:15px}
.idea-field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.idea-meta{display:flex;justify-content:flex-start;padding:6px 4px 0;font-size:11.5px;color:#98A2B3}

.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  min-height:34px;padding:0 12px;border-radius:999px;
  border:1px solid #EFDFC0;background:var(--amber-soft);color:#7A4A00;
  font-size:13px;font-weight:600;
  display:inline-flex;align-items:center;
  transition:background-color .15s,border-color .15s,color .15s;
}
.chip:hover{background:#FDEDD1;border-color:#E9D0A3}
.chip:active{transform:translateY(1px)}

.composer-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field label{font-size:12.5px;font-weight:600;color:#475467}
.field .opt{font-weight:400;color:#98A2B3}
.field select,.field input{
  min-height:44px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);font-size:15px;
  transition:border-color .15s,box-shadow .15s;
}
.field select:focus,.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.field input::placeholder{color:#98A2B3;font-size:14px}

.composer-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px dashed #E1E6EC;padding-top:14px;flex-wrap:wrap;
}
.price-wrap{display:flex;flex-direction:column;gap:3px;min-width:0}
.price-chip{
  display:inline-flex;align-items:center;align-self:flex-start;
  min-height:26px;padding:0 11px;border-radius:999px;
  background:#F2F4F7;color:#475467;font-size:12.5px;font-weight:700;
}
.price-chip.is-free{background:var(--primary-soft);color:var(--primary)}
.price-chip.is-error{background:var(--danger-soft);color:var(--danger)}
.price-hint{font-size:11.5px;color:#98A2B3}

.alert{
  display:flex;align-items:flex-start;justify-content:space-between;gap:12px;
  padding:11px 14px;border-radius:var(--r-sm);
  background:var(--danger-soft);border:1px solid #F3D6D3;color:#7A1D14;
  font-size:13.5px;line-height:1.6;
}
.alert-actions{display:flex;align-items:center;gap:6px;flex:0 0 auto}
.alert-close{
  width:26px;height:26px;border:0;background:transparent;color:#7A1D14;
  font-size:18px;line-height:1;border-radius:6px;
}
.alert-close:hover{background:rgba(180,35,24,.1)}

/* ============ workspace ============ */
.workspace{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow);
  padding:16px;display:flex;flex-direction:column;gap:14px;
  animation:fadeUp .22s ease-out;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.ws-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}
.ws-id{display:flex;align-items:center;gap:11px;min-width:0}
.swatch{
  width:36px;height:36px;flex:0 0 36px;border-radius:9px;overflow:hidden;
  display:flex;flex-direction:column;border:1px solid rgba(16,24,40,.1);
}
.swatch-lg{width:44px;height:44px;flex-basis:44px;border-radius:11px}
.swatch span{flex:1;display:block}
.ws-title{min-width:0}
.ws-title h2{font-size:18px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46ch}
.ws-title p{margin:2px 0 0;font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:56ch}
.ws-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.badge{
  display:inline-flex;align-items:center;min-height:26px;padding:0 10px;
  border-radius:999px;font-size:12px;font-weight:600;
  background:var(--amber-soft);color:var(--amber-ink);border:1px solid #F3E3BE;
  white-space:nowrap;
}
.ws-updated{font-size:11.5px;color:#98A2B3;white-space:nowrap}

.tabs{display:flex;gap:4px;padding:4px;background:#F2F4F7;border:1px solid var(--line);border-radius:12px}
.tab{
  flex:1;min-height:38px;border:0;background:transparent;border-radius:9px;
  font-weight:600;font-size:14px;color:var(--muted);
  transition:background-color .15s,color .15s,box-shadow .15s;
}
.tab:hover:not(.is-active){color:var(--ink)}
.tab.is-active{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}

.tab-body{display:flex;flex-direction:column;gap:12px}
.pane{display:flex;flex-direction:column;gap:12px;min-width:0}

.pane-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.devices{display:flex;gap:3px;padding:3px;background:#F2F4F7;border:1px solid var(--line);border-radius:10px}
.device-btn{
  display:inline-flex;align-items:center;gap:6px;
  min-height:34px;padding:0 11px;border:0;border-radius:8px;
  background:transparent;color:var(--muted);font-size:12.5px;font-weight:600;
  transition:background-color .15s,color .15s,box-shadow .15s;
}
.device-btn.is-active{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.toolbar-note{font-size:12px;color:#98A2B3}
.toolbar-actions{display:flex;gap:6px;flex-wrap:wrap}

/* stage + device */
.stage{
  position:relative;
  height:min(66vh,640px);min-height:360px;
  display:flex;align-items:flex-start;justify-content:center;
  padding:16px;overflow:auto;
  border:1px solid var(--line);border-radius:var(--r-md);
  background-color:#EFF1F4;
  background-image:radial-gradient(#DFE3E8 1px,transparent 1px);
  background-size:16px 16px;
}
.device-scaler{position:relative;direction:ltr;flex:0 0 auto}
.device{
  position:absolute;top:0;left:0;
  transform-origin:top left;
  background:var(--dark);
  display:flex;flex-direction:column;
  box-shadow:0 14px 34px rgba(16,24,40,.22);
  overflow:hidden;
}
.device--mobile{border-radius:26px;padding:9px}
.device--tablet{border-radius:18px;padding:10px}
.device--desktop{border-radius:12px;padding:10px}
.device-bar{display:flex;align-items:center;gap:6px;padding:0 3px 8px;flex:0 0 auto}
.device-bar .dot{width:8px;height:8px;border-radius:50%;flex:0 0 8px}
.dot-r{background:#FF5F57}.dot-y{background:#FEBC2E}.dot-g{background:#28C840}
.device-bar .addr{
  flex:1;margin-left:8px;padding:2px 10px;border-radius:999px;
  background:rgba(255,255,255,.1);color:#B9C0CC;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;
  text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.device iframe{flex:1;width:100%;border:0;background:#fff;border-radius:8px;display:block}

/* code pane */
.code-wrap{background:var(--dark);border-radius:var(--r-md);padding:12px;display:flex}
.code-area{
  width:100%;min-height:420px;resize:vertical;
  border:0;background:transparent;color:#DDE3EA;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12.5px;line-height:1.65;
  direction:ltr;text-align:left;outline:none;
  tab-size:2;
}

/* improve pane */
.improve-box{
  background:#FBFCFD;border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px;display:flex;flex-direction:column;gap:12px;
}
.improve-label{font-size:13px;font-weight:700;color:#475467}
.improve-box textarea{
  width:100%;min-height:88px;resize:vertical;
  padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);font-size:15px;line-height:1.65;
  transition:border-color .15s,box-shadow .15s;
}
.improve-box textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(15,118,110,.12)}
.improve-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px dashed #E1E6EC;padding-top:12px}

.history{display:flex;flex-direction:column;gap:8px}
.history-item{
  display:flex;align-items:flex-start;gap:10px;
  padding:10px 12px;border:1px solid var(--line-soft);border-radius:var(--r-sm);
  background:var(--surface);
}
.history-item .dot-mark{width:6px;height:6px;border-radius:50%;background:var(--primary);margin-top:8px;flex:0 0 6px}
.history-item p{margin:0;font-size:13px;color:#344054}
.history-item small{display:block;font-size:11px;color:#98A2B3;margin-top:2px}
.history-empty{font-size:12.5px;color:#98A2B3;text-align:center;padding:8px}

/* ============ empty state ============ */
.empty-state{display:flex;flex-direction:column;gap:18px}
.empty-hero{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:28px 20px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:8px;
}
.empty-icon{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);margin-bottom:4px;
}
.empty-hero h2{font-size:19px}
.empty-hero p{margin:0;font-size:13.5px;color:var(--muted);max-width:52ch}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.step{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow);padding:14px;
}
.step-n{
  display:inline-grid;place-items:center;width:24px;height:24px;border-radius:8px;
  background:var(--primary-soft);color:var(--primary);font-weight:800;font-size:12.5px;
  font-family:'Tajawal',sans-serif;margin-bottom:6px;
}
.step h3{font-size:14px;margin:0 0 2px}
.step p{margin:0;font-size:12px;color:var(--muted);line-height:1.55}

.section-title{font-size:15px;margin-top:2px}
.hint-soft{font-weight:400;font-size:12px;color:#98A2B3;font-family:'IBM Plex Sans Arabic',sans-serif}
.tpl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.tpl-card{
  display:flex;flex-direction:column;align-items:flex-start;gap:4px;
  padding:12px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);box-shadow:var(--shadow);text-align:right;
  transition:border-color .15s,background-color .15s;
}
.tpl-card:hover{border-color:#CBD5E1;background:#FCFCFD}
.tpl-swatch{width:100%;height:6px;border-radius:99px;margin-bottom:6px}
.tpl-name{font-weight:700;font-size:13.5px}
.tpl-desc{font-size:11.5px;color:var(--muted)}

/* ============ sidebar ============ */
.sidebar{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow);
  position:sticky;top:112px;
  max-height:calc(100vh - 132px);
  overflow:hidden;
}
.sidebar-head{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:12px 14px;border-bottom:1px solid var(--line-soft);
}
.sidebar-head h2{font-size:14.5px;display:flex;align-items:center;gap:7px}
.count{
  display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 6px;
  border-radius:999px;background:#F2F4F7;color:#475467;font-size:11.5px;font-weight:700;
  font-family:'IBM Plex Sans Arabic',sans-serif;
}
.sidebar-head-actions{display:flex;align-items:center;gap:4px}
.proj-list{flex:1;overflow-y:auto;padding:10px;display:flex;flex-direction:column;gap:8px;min-height:120px}
.side-empty{font-size:12.5px;color:#98A2B3;text-align:center;padding:24px 12px;line-height:1.8}
.sidebar-foot{border-top:1px solid var(--line-soft);padding:10px 12px 12px;display:flex;flex-direction:column;gap:8px}
.sidebar-note{margin:0;font-size:11px;color:#98A2B3}
.sidebar-foot-actions{display:flex;gap:5px;flex-wrap:wrap}

.proj-card{
  display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:9px;align-items:center;
  padding:9px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);
  transition:border-color .15s,background-color .15s;
}
.proj-card:hover{border-color:#D0D5DD;background:#FCFCFD}
.proj-card.is-active{border-color:var(--primary);background:var(--primary-soft)}
.proj-body{min-width:0}
.proj-body h3{
  font-size:13px;font-weight:700;margin:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.proj-meta{margin:2px 0 0;display:flex;align-items:center;gap:6px;font-size:10.5px;color:#98A2B3;flex-wrap:wrap}
.proj-meta .badge{min-height:19px;padding:0 7px;font-size:10px;border-radius:6px}
.proj-actions{display:flex;gap:1px}
.proj-actions button{
  width:28px;height:28px;border:0;background:transparent;border-radius:7px;
  color:#98A2B3;display:grid;place-items:center;
  transition:background-color .15s,color .15s;
}
.proj-actions button:hover{background:#F2F4F7;color:var(--ink)}
.proj-actions button[data-act="del"]:hover{background:var(--danger-soft);color:var(--danger)}

/* ============ sheets / modals ============ */
.sheet{
  position:fixed;inset:0;z-index:90;
  display:flex;align-items:center;justify-content:center;padding:18px;
}
.sheet-backdrop{position:absolute;inset:0;background:rgba(16,24,40,.48)}
.sheet-panel{
  position:relative;width:min(520px,100%);
  background:var(--surface);border-radius:18px;padding:20px;
  box-shadow:0 24px 64px rgba(16,24,40,.28);
  display:flex;flex-direction:column;gap:12px;
  animation:pop .18s ease-out;
  max-height:calc(100vh - 36px);overflow-y:auto;
}
@keyframes pop{from{opacity:0;transform:scale(.97) translateY(6px)}to{opacity:1;transform:none}}
.sheet-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.sheet-head h2{font-size:17px}
.sheet-sub{margin:0;font-size:12.5px;color:var(--muted)}
.sheet-note{margin:0;font-size:11.5px;color:#98A2B3;line-height:1.7;border-top:1px solid var(--line-soft);padding-top:10px}
.sheet-actions{display:flex;gap:8px;flex-wrap:wrap}
.link-input{
  width:100%;min-height:46px;padding:10px 12px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:#F9FAFB;font-size:12px;font-family:ui-monospace,monospace;
  unicode-bidi:plaintext;
}
.link-meta{font-size:11.5px;color:#98A2B3}

.settings-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.settings-stats div{
  background:#F9FAFB;border:1px solid var(--line-soft);border-radius:var(--r-sm);
  padding:10px 12px;display:flex;flex-direction:column;
}
.settings-stats strong{font-family:'Tajawal',sans-serif;font-size:20px;color:var(--primary)}
.settings-stats span{font-size:11.5px;color:var(--muted)}
.settings-list{display:flex;flex-direction:column;gap:8px}
.settings-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);text-align:right;color:var(--ink);
  transition:background-color .15s,border-color .15s,color .15s;
}
.settings-row:hover{background:#F9FAFB;border-color:#D0D5DD}
.settings-row span{display:flex;flex-direction:column;gap:1px}
.settings-row strong{font-size:13.5px;font-weight:700}
.settings-row small{font-size:11.5px;color:var(--muted)}
.settings-row.danger{color:var(--danger);border-color:#F3D6D3}
.settings-row.danger:hover{background:var(--danger-soft)}
.settings-row.danger small{color:#B4574E}

/* ============ fullscreen preview ============ */
.fullpreview{
  position:fixed;inset:0;z-index:95;background:#fff;
  display:flex;flex-direction:column;
}
.fp-bar{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 14px;border-bottom:1px solid var(--line);background:var(--surface);
}
.fp-bar strong{font-size:14px;font-family:'Tajawal',sans-serif}
.fullpreview iframe{flex:1;width:100%;border:0;background:#fff}

/* ============ viewer ============ */
.viewer{position:fixed;inset:0;z-index:88;background:#fff;display:flex;flex-direction:column}
.viewer-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;border-bottom:1px solid var(--line);flex-wrap:wrap;
}
.viewer-id{display:flex;align-items:center;gap:10px;min-width:0}
.viewer-titles{min-width:0}
.viewer-titles h1{font-size:15.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:44ch}
.viewer-titles p{margin:0;font-size:11.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52ch}
.viewer-actions{display:flex;gap:6px;flex-wrap:wrap}
.viewer-note{
  margin:0;padding:6px 14px;font-size:11.5px;color:var(--amber-ink);
  background:var(--amber-soft);border-bottom:1px solid #F3E3BE;text-align:center;
}
.viewer-frame{flex:1;display:flex;min-height:0}
.viewer-frame iframe{flex:1;width:100%;border:0;background:#fff}
.viewer-error{
  position:absolute;inset:0;background:#fff;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:10px;text-align:center;padding:24px;
}
.viewer-error h2{font-size:19px}
.viewer-error p{margin:0;color:var(--muted);font-size:13.5px;max-width:44ch}

/* ============ toast / busy ============ */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translate(-50%,16px);
  z-index:120;max-width:calc(100vw - 32px);
  background:#101828;color:#fff;border-radius:999px;
  padding:10px 18px;font-size:13.5px;text-align:center;
  opacity:0;pointer-events:none;
  transition:opacity .18s ease-out,transform .18s ease-out;
  box-shadow:0 10px 30px rgba(16,24,40,.28);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

.busy{
  position:fixed;inset:0;z-index:110;
  display:flex;align-items:center;justify-content:center;
  background:rgba(16,24,40,.42);
  -webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);
  padding:20px;
}
.busy-card{
  background:var(--surface);border-radius:18px;padding:26px 24px;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  box-shadow:0 24px 64px rgba(16,24,40,.3);text-align:center;
  width:min(320px,100%);
}
.busy-card p{margin:0;font-size:15px;font-weight:700}
.busy-card small{color:var(--muted);font-size:11.5px}
.spinner{
  width:34px;height:34px;border-radius:50%;
  border:3px solid #E4E7EC;border-top-color:var(--primary);
  animation:spin .9s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============ backdrop ============ */
.backdrop{display:none;position:fixed;inset:0;z-index:55;background:rgba(16,24,40,.45)}

/* ============ responsive ============ */
@media (max-width:1023px){
  .shell{grid-template-columns:minmax(0,1fr);padding:14px;gap:14px}
  .only-mobile{display:inline-flex}
  .sidebar{
    position:fixed;inset-inline:0;bottom:0;top:auto;left:0;right:0;
    max-height:80vh;z-index:60;
    border-radius:20px 20px 0 0;border-bottom:0;
    display:none;
  }
  .sidebar.open{display:flex;animation:sheetUp .2s ease-out}
  .backdrop.show{display:block;z-index:56}
  .stage{height:min(58vh,520px);min-height:320px}
  .composer{padding:16px;border-radius:var(--r-md)}
  .composer-title{font-size:19px}
  .workspace{padding:13px;border-radius:var(--r-md)}
  .ws-title h2{max-width:100%;font-size:16.5px}
  .ws-title p{max-width:100%}
  .steps{grid-template-columns:1fr}
  .sheet{align-items:flex-end;padding:0}
  .sheet-panel{
    width:100%;border-radius:20px 20px 0 0;padding:18px;
    max-height:88vh;animation:sheetUp .2s ease-out;
  }
  .toast{bottom:18px}
  .viewer-titles h1{max-width:60vw}
}
@keyframes sheetUp{from{transform:translateY(24px);opacity:.6}to{transform:none;opacity:1}}

@media (max-width:430px){
  .topbar-inner{padding:9px 14px}
  .brand-text span{display:none}
  .composer-row{grid-template-columns:1fr}
  .composer-foot{flex-direction:column;align-items:stretch}
  .composer-foot .btn-lg{width:100%}
  .price-wrap{align-items:flex-start}
  .notice-bar{font-size:11.5px;padding:6px 12px}
  .ws-actions{width:100%;justify-content:space-between}
  .device-btn span{display:none}
  .device-btn{padding:0 9px}
  .toolbar-note{display:none}
  .device-bar .addr{display:none}
  .tpl-grid{grid-template-columns:1fr 1fr}
  .settings-stats{grid-template-columns:1fr 1fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .spinner{animation-duration:1.4s !important;animation-iteration-count:infinite !important}
}