:root{
  --bg:#F6F2EC;
  --bg-2:#FFFFFF;
  --ink:#1A1A1A;
  --ink-2:#3A3A3A;
  --muted:#7A7568;
  --line:#E6DFD2;
  --accent:#FF7A1A;
  --accent-2:#0A2540;
  --green:#2F8F5E;
  --red:#C64545;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{height:100%;font-family:'Inter',sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
body{display:flex;flex-direction:column;overflow:hidden}
em{font-family:'Instrument Serif',serif;font-weight:400;font-style:italic;color:var(--accent)}

/* Topbar */
.topbar{flex:0 0 auto;display:flex;justify-content:space-between;align-items:center;padding:10px 18px;background:var(--bg-2);border-bottom:1px solid var(--line);height:54px}
.brand{display:flex;align-items:center;gap:10px}
.brand .dot{width:8px;height:8px;background:var(--accent);display:inline-block;border-radius:1px}
.brand h1{font-size:15px;font-weight:600;letter-spacing:-.01em}
.actions{display:flex;gap:8px}

.btn{border:1px solid var(--line);background:var(--bg-2);color:var(--ink);padding:7px 14px;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;text-decoration:none;display:inline-block;transition:all .15s}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn-primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-primary:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-ghost{background:transparent}
.btn-sm{padding:4px 10px;font-size:12px}
.btn.danger:hover{border-color:var(--red);color:var(--red)}

/* Layout */
.layout{flex:1 1 auto;display:grid;grid-template-columns:260px 1fr 360px;overflow:hidden;min-height:0}

.sidebar-left,.sidebar-right{background:var(--bg-2);border:1px solid var(--line);overflow:auto;display:flex;flex-direction:column}
.sidebar-left{border-top:none;border-bottom:none;border-left:none}
.sidebar-right{border-top:none;border-bottom:none;border-right:none}

.panel-head{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg-2);z-index:1}
.panel-head h3{font-size:11px;text-transform:uppercase;letter-spacing:.16em;color:var(--muted);font-weight:600}
.icon-btn{width:24px;height:24px;border-radius:50%;border:1px solid var(--line);background:var(--bg-2);color:var(--ink);font-size:16px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}

.slide-list{list-style:none;padding:6px 0;flex:1 1 auto;overflow:auto}
.slide-list li{padding:9px 16px;border-bottom:1px solid var(--line);cursor:pointer;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2);user-select:none}
.slide-list li:hover{background:#FBF7EF}
.slide-list li.active{background:#FFF1E2;color:var(--ink);border-left:3px solid var(--accent);padding-left:13px;font-weight:500}
.slide-list li .num{font-variant-numeric:tabular-nums;color:var(--muted);font-size:11px;min-width:22px}
.slide-list li.dragging{opacity:.4}
.slide-list li.drag-over{border-top:2px solid var(--accent)}
.panel-foot{padding:10px 16px;border-top:1px solid var(--line);color:var(--muted);font-size:11px}

/* Preview */
.preview{display:flex;flex-direction:column;background:#EAE5D9;overflow:hidden;min-width:0}
.preview-toolbar{flex:0 0 auto;display:flex;justify-content:space-between;align-items:center;padding:8px 14px;background:var(--bg-2);border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}
#active-slide-label{font-weight:600;color:var(--ink)}
.iframe-wrap{flex:1 1 auto;display:flex;align-items:center;justify-content:center;padding:18px;overflow:auto}
#deck-iframe{width:100%;height:100%;border:0;background:var(--bg);box-shadow:0 8px 28px rgba(0,0,0,.12);border-radius:6px;max-width:1280px;max-height:720px;aspect-ratio:16/9}

/* Right panel */
.tabs{display:flex;border-bottom:1px solid var(--line);background:var(--bg-2);position:sticky;top:0;z-index:1}
.tab{flex:1;padding:11px 8px;background:transparent;border:none;font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent}
.tab.active{color:var(--accent);border-bottom-color:var(--accent)}
.tab-pane{padding:14px 16px;display:none;flex:1;overflow:auto}
.tab-pane.active{display:block}
.hint{color:var(--muted);font-size:12px;margin-bottom:12px;font-style:italic}
.muted{color:var(--muted)}
.small{font-size:11px}
.hidden{display:none}

label{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-weight:600;margin:10px 0 5px}
input,select,textarea{width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:5px;font-family:'Inter',sans-serif;font-size:13px;background:var(--bg-2);color:var(--ink);resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}
textarea{min-height:90px}

#chart-editor{margin-top:14px}
.chart-row{display:grid;grid-template-columns:1fr 90px;gap:8px;margin-bottom:6px;align-items:center}
.chart-row input[type=text]{font-size:12px}
.chart-row input[type=number]{font-variant-numeric:tabular-nums;text-align:right;font-size:12px}
.chart-series-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;margin:14px 0 6px;font-weight:600}
#chart-save-btn{margin-top:14px;width:100%}

#sel-info{margin-bottom:8px;padding:6px 8px;background:var(--bg);border-radius:4px;font-family:'SF Mono',monospace}
#btn-apply-text{margin-top:10px;width:100%}

/* Toast */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--ink);color:#fff;padding:11px 22px;border-radius:6px;font-size:13px;font-weight:500;z-index:1000;opacity:0;transition:all .3s;pointer-events:none;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.ok{background:var(--green)}
.toast.err{background:var(--red)}

#img-results{margin-top:14px}
.img-result{background:var(--bg);padding:8px;border-radius:4px;margin-bottom:6px;font-size:11px;font-family:'SF Mono',monospace;word-break:break-all}

/* Drag-over state for slide list */
.drop-target{outline:2px dashed var(--accent);outline-offset:-2px}