/* =====================================================================
   Header Builder — shared styles (used by the in-app view AND the demo).
   Scope note: loaded inside the builder's own document (module = iframe,
   demo = standalone page), so generic class names cannot collide with the
   main app stylesheet.
   ===================================================================== */
:root{
  --blue:#2563eb; --blue-d:#1d4ed8; --ink:#0f172a; --t2:#475569; --t3:#94a3b8;
  --bg:#f1f5f9; --panel:#ffffff; --border:#e2e8f0; --rail:#1e293b; --rail-h:#334155;
  --ok:#10b981; --danger:#ef4444; --violet:#8b5cf6;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--ink);height:100vh;overflow:hidden}
button{font-family:inherit;cursor:pointer}
.hidden{display:none!important}

.topbar{height:52px;background:var(--rail);color:#fff;display:flex;align-items:center;gap:14px;padding:0 16px;position:relative;z-index:40}
.topbar .brand{font-weight:800;letter-spacing:.3px;display:flex;align-items:center;gap:8px;font-size:15px}
.topbar .brand .m{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,#6366f1,#8b5cf6);display:flex;align-items:center;justify-content:center;font-size:15px}
.tb-sep{width:1px;height:24px;background:rgba(255,255,255,.15)}
.tb-btn{background:transparent;border:none;color:#cbd5e1;width:34px;height:34px;border-radius:8px;font-size:14px;display:flex;align-items:center;justify-content:center}
.tb-btn:hover{background:var(--rail-h);color:#fff}
.tb-btn:disabled{opacity:.35;cursor:default;background:transparent}
.proj-name{font-weight:600;font-size:14px;color:#e2e8f0;margin:0 auto}
.btn{border:none;border-radius:9px;padding:8px 16px;font-weight:700;font-size:13px;display:inline-flex;align-items:center;gap:7px}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-d)}
.btn-ghost{background:var(--rail-h);color:#e2e8f0}.btn-ghost:hover{background:#475569}
.btn-save{background:var(--ok);color:#fff}.btn-save:hover{background:#059669}

.shell{display:flex;height:calc(100vh - 52px)}
.rail{width:76px;background:var(--rail);display:flex;flex-direction:column;padding:10px 0;gap:4px;flex-shrink:0;overflow-y:auto}
.rail-item{color:#94a3b8;background:transparent;border:none;padding:11px 4px;display:flex;flex-direction:column;align-items:center;gap:5px;font-size:10.5px;font-weight:600;border-left:3px solid transparent}
.rail-item i{font-size:19px}
.rail-item:hover{color:#fff;background:rgba(255,255,255,.05)}
.rail-item.active{color:#fff;background:rgba(37,99,235,.18);border-left-color:var(--blue)}
.panel{width:288px;background:var(--panel);border-right:1px solid var(--border);flex-shrink:0;overflow-y:auto;padding:18px 16px}
.panel h3{font-size:15px;font-weight:800;margin-bottom:3px}
.panel .sub{font-size:11.5px;color:var(--t3);margin-bottom:16px;line-height:1.5}
.grp-lbl{font-size:11px;font-weight:700;color:var(--t3);text-transform:uppercase;letter-spacing:.5px;margin:18px 0 9px}
.add-card{width:100%;text-align:left;border:1px solid var(--border);background:#f8fafc;border-radius:10px;padding:14px 16px;margin-bottom:10px;font-weight:700;color:var(--ink);transition:.15s;display:flex;align-items:center;gap:10px}
.add-card:hover{border-color:var(--blue);background:#eff6ff;transform:translateY(-1px);box-shadow:0 4px 10px rgba(37,99,235,.08)}
.add-card i{color:var(--blue);font-size:15px;width:20px;text-align:center}
.add-card small{display:block;font-weight:500;color:var(--t3);font-size:11px;margin-top:2px}
.el-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.el-tile{border:1px solid var(--border);background:#fff;border-radius:10px;height:74px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:7px;font-size:11.5px;font-weight:600;color:var(--t2)}
.el-tile:hover{border-color:var(--blue);color:var(--blue);background:#f8faff}
.el-tile i{font-size:19px}
.tpl-card{border:1px solid var(--border);border-radius:10px;overflow:hidden;margin-bottom:12px;background:#fff;transition:.15s}
.tpl-card:hover{border-color:var(--blue);box-shadow:0 6px 16px rgba(0,0,0,.08);transform:translateY(-2px)}
.tpl-prev{height:78px;border-bottom:1px solid var(--border);overflow:hidden;position:relative;background:#fff}
.tpl-name{padding:8px 12px;font-size:12.5px;font-weight:700}
.up-zone{border:2px dashed #cbd5e1;border-radius:12px;padding:26px 14px;text-align:center;color:var(--t3);font-size:12.5px;font-weight:600}
.up-zone:hover{border-color:var(--blue);color:var(--blue);background:#f8faff}
.up-zone i{font-size:24px;display:block;margin-bottom:8px}
.up-thumbs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}
.up-thumb{border:1px solid var(--border);border-radius:8px;height:56px;background-size:contain;background-repeat:no-repeat;background-position:center;cursor:pointer}
.up-thumb:hover{border-color:var(--blue)}

.stage-wrap{flex:1;overflow:auto;display:flex;align-items:center;justify-content:center;padding:44px;position:relative;background:
  linear-gradient(45deg,#e9eef5 25%,transparent 25%),linear-gradient(-45deg,#e9eef5 25%,transparent 25%),
  linear-gradient(45deg,transparent 75%,#e9eef5 75%),linear-gradient(-45deg,transparent 75%,#e9eef5 75%);
  background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0}
.canvas-shadow{box-shadow:0 12px 40px rgba(15,23,42,.18);position:relative}
.ruler-tag{position:absolute;top:-26px;left:0;font-size:11px;font-weight:700;color:var(--t2);background:#fff;padding:2px 8px;border-radius:5px;border:1px solid var(--border)}
#canvas{position:relative;background:#fff;overflow:hidden;outline:1px solid #dbe2ea}
#overlay{position:absolute;inset:0;overflow:visible;pointer-events:none;z-index:25}

.el{position:absolute;overflow:hidden}
.el .txt{width:100%;height:100%;display:flex;flex-direction:column;justify-content:center;word-break:break-word;outline:none}
.el.sel{outline:1px dashed rgba(37,99,235,.6)}
.selbox{position:absolute;border:1.5px solid var(--blue);pointer-events:none}
.hnd{position:absolute;width:11px;height:11px;background:#fff;border:1.5px solid var(--blue);border-radius:50%;pointer-events:auto}
.hnd.nw{cursor:nwse-resize}.hnd.ne{cursor:nesw-resize}.hnd.sw{cursor:nesw-resize}.hnd.se{cursor:nwse-resize}
.hnd-rot{position:absolute;width:18px;height:18px;background:var(--blue);border:2px solid #fff;border-radius:50%;cursor:grab;pointer-events:auto;display:flex;align-items:center;justify-content:center;color:#fff;font-size:9px;box-shadow:0 2px 5px rgba(0,0,0,.25)}

#floatbar{position:absolute;z-index:60;background:var(--rail);border-radius:11px;box-shadow:0 10px 30px rgba(0,0,0,.35);display:flex;align-items:center;gap:3px;padding:6px 8px;color:#fff}
#floatbar select,#floatbar input[type=number]{background:var(--rail-h);border:1px solid rgba(255,255,255,.12);color:#fff;border-radius:6px;font-size:12px;outline:none}
#floatbar select{padding:5px 6px;max-width:118px}
#floatbar .fb-size{width:44px;text-align:center;padding:5px 4px}
.fb-btn{background:transparent;border:none;color:#cbd5e1;width:30px;height:30px;border-radius:7px;font-size:13px}
.fb-btn:hover{background:var(--rail-h);color:#fff}.fb-btn.on{background:var(--blue);color:#fff}
.fb-color{width:26px;height:26px;border:none;background:none;padding:0;cursor:pointer}
.fb-sep{width:1px;height:20px;background:rgba(255,255,255,.16);margin:0 3px}

.rpanel{width:264px;background:var(--panel);border-left:1px solid var(--border);flex-shrink:0;overflow-y:auto;padding:16px}
.rp-empty{color:var(--t3);font-size:12.5px;text-align:center;padding:40px 10px;line-height:1.6}
.rp-sec{border-bottom:1px solid var(--border);padding-bottom:14px;margin-bottom:14px}
.rp-sec .t{font-size:11px;font-weight:700;color:var(--t3);text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px}
.row{display:flex;align-items:center;gap:8px;margin-bottom:9px}
.row label{font-size:11.5px;color:var(--t2);width:52px;flex-shrink:0;font-weight:600}
.inp{width:100%;padding:6px 8px;border:1px solid var(--border);border-radius:7px;font-size:12px;outline:none;font-family:inherit}
.inp:focus{border-color:var(--blue)}
select.inp{padding:6px 6px}
.mini{display:flex;gap:6px}
.mini .inp{padding:6px 5px;text-align:center}
.color-in{width:34px;height:30px;border:1px solid var(--border);border-radius:7px;padding:1px;cursor:pointer;background:#fff}
.seg{display:flex;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.seg button{flex:1;border:none;background:#fff;padding:6px;color:var(--t2);font-size:12px}
.seg button.on{background:var(--blue);color:#fff}
.rng{width:100%}
.chip-row{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--border);background:#f8fafc;border-radius:7px;padding:6px 10px;font-size:11.5px;font-weight:600;color:var(--t2)}
.chip:hover{border-color:var(--blue);color:var(--blue)}
.chip.danger:hover{border-color:var(--danger);color:var(--danger);background:#fef2f2}

.modal{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:100;display:none;align-items:center;justify-content:center;padding:24px}
.modal.open{display:flex}
.modal-card{background:#fff;border-radius:14px;width:780px;max-width:100%;max-height:88vh;display:flex;flex-direction:column;box-shadow:0 24px 60px rgba(0,0,0,.3)}
.modal-head{padding:16px 22px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-weight:800}
.modal-body{padding:20px 22px;overflow:auto}
.modal-foot{padding:14px 22px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px;background:#f8fafc;border-radius:0 0 14px 14px}
.tab-row{display:flex;gap:6px;margin-bottom:14px}
.tab-row button{border:1px solid var(--border);background:#fff;border-radius:8px;padding:7px 14px;font-size:12.5px;font-weight:700;color:var(--t2)}
.tab-row button.on{background:var(--blue);color:#fff;border-color:var(--blue)}
pre.code{background:#0f172a;color:#a5f3fc;padding:16px;border-radius:10px;font-size:11.5px;line-height:1.6;overflow:auto;max-height:52vh;white-space:pre-wrap;word-break:break-word}
.note{font-size:11.5px;color:var(--t2);background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:10px 12px;margin-bottom:14px;line-height:1.55}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:11px 20px;border-radius:10px;font-size:13px;font-weight:600;opacity:0;transition:.25s;z-index:200;box-shadow:0 10px 30px rgba(0,0,0,.3)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Header Builder Pro Extensions */
.el-badge{display:flex;align-items:center;justify-content:center;overflow:hidden;}
.el-badge span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.divider-svg{position:absolute;inset:0;width:100%;height:100%;}
.divider-svg svg{display:block;width:100%;height:100%;}

/* Font Dropdown Groups */
select.inp optgroup{background:#f1f5f9;color:var(--t3);font-weight:700;font-style:normal;}
select.inp option{background:#fff;color:var(--ink);font-weight:normal;}

/* Additional controls */
.fb-shadow{width:30px;height:30px;border:none;background:transparent;color:#cbd5e1;border-radius:7px;cursor:pointer;}
.fb-shadow:hover{background:var(--rail-h);color:#fff;}
.fb-shadow.on{color:#fbbf24;}

/* ── Zoom & Smart Snap ─────────────────────────────────────── */
.canvas-shadow{ transition:transform .15s ease, margin .15s ease; }