/* App shell: top bar, mode bar, three-column workspace. */
.topbar{display:flex;align-items:center;gap:20px;height:60px;padding:0 16px 0 18px;background:linear-gradient(180deg,var(--panel-2),var(--bg-2));border-bottom:1px solid var(--line);flex-shrink:0;position:relative;z-index:5}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);text-decoration:none;flex-shrink:0}
.brand-mark{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:radial-gradient(120% 120% at 30% 20%,#2a3a1a,#141c10);border:1px solid #3c5222;box-shadow:0 0 18px -4px rgba(184,242,90,.35)}
:root[data-theme="light"] .brand-mark{background:radial-gradient(120% 120% at 30% 20%,#e8f6c9,#d9eab9);border-color:#a8c878;box-shadow:0 0 14px -5px rgba(83,127,19,.4)}
.brand-mark svg{width:20px;height:20px}
.brand-name{font-weight:800;font-size:15px;letter-spacing:.14em;line-height:1}
.brand-name b{color:var(--lime);font-weight:800}
.brand-sub{display:block;font-size:8.5px;font-weight:600;letter-spacing:.22em;color:var(--dim);margin-top:4px;white-space:nowrap}
.brand-name{white-space:nowrap}
.sep{width:1px;height:26px;background:var(--line-2);flex-shrink:0}
.doc{display:flex;flex-direction:column;justify-content:center;min-width:0;flex:0 1 320px}
.doc input{height:26px;padding:0 6px;margin-left:-7px;background:transparent;border-color:transparent;font-weight:650;font-size:14px;letter-spacing:-.01em}
.doc input:hover{border-color:var(--line-2);background:var(--bg-2)}
.save-state{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--dim);padding-left:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.save-state::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--safe);box-shadow:0 0 8px var(--safe);flex-shrink:0}
.save-state.pending::before{background:var(--warn);box-shadow:0 0 8px var(--warn)}
.save-state.error::before{background:var(--danger);box-shadow:0 0 8px var(--danger)}
.top-actions{display:flex;align-items:center;gap:6px;margin-left:auto}

.modebar{display:flex;align-items:stretch;gap:4px;height:44px;padding:0 16px;background:var(--bg-2);border-bottom:1px solid var(--line);flex-shrink:0}
.tab{display:flex;align-items:center;gap:8px;padding:0 13px;border:0;background:none;color:var(--muted);font-weight:600;font-size:12.5px;position:relative;white-space:nowrap;flex-shrink:0}
.tab svg{width:15px;height:15px}
.tab.active{color:var(--text)}
.tab.active::after{content:'';position:absolute;left:10px;right:10px;bottom:-1px;height:2px;border-radius:2px 2px 0 0;background:var(--lime);box-shadow:0 0 12px var(--lime)}
.tab.soon{color:var(--dim)}
.tab .soon-tag{font-size:9px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);border:1px solid var(--line-2);border-radius:4px;padding:2px 5px}
.modebar-right{margin-left:auto;display:flex;align-items:center;gap:6px}

.workspace{flex:1;min-height:0;display:grid;grid-template-columns:268px minmax(0,1fr) 300px}
.sidebar{background:var(--panel);overflow-y:auto;overflow-x:hidden;min-height:0}
.sidebar.left{border-right:1px solid var(--line)}
.sidebar.right{border-left:1px solid var(--line)}
.section{padding:18px 16px;border-bottom:1px solid var(--line)}
.section:last-child{border-bottom:0}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}
.section-title{font-size:12px;font-weight:700;letter-spacing:-.005em;color:var(--text)}
.section-note{font-size:11.5px;line-height:1.55;color:var(--muted);margin:-4px 0 12px}

.viewport{position:relative;min-width:0;min-height:0;overflow:hidden;background:radial-gradient(1200px 700px at 50% 40%,#111923 0%,#0a0e13 70%)}
:root[data-theme="light"] .viewport{background:radial-gradient(1200px 700px at 50% 40%,#fff 0%,#e8edf2 76%)}
.viewport::before{content:'';position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(rgba(255,255,255,.035) 1px,transparent 1px);background-size:22px 22px;mask-image:radial-gradient(ellipse at center,#000 30%,transparent 80%)}
:root[data-theme="light"] .viewport::before{background-image:radial-gradient(rgba(41,61,82,.1) 1px,transparent 1px)}
#plan{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none}
.floating{position:absolute;z-index:2;background:rgba(16,22,30,.82);backdrop-filter:blur(12px) saturate(140%);-webkit-backdrop-filter:blur(12px) saturate(140%);border:1px solid var(--line-2);border-radius:var(--radius);box-shadow:var(--shadow)}
:root[data-theme="light"] .floating{background:#fff;backdrop-filter:none;-webkit-backdrop-filter:none;border-color:var(--line-2);box-shadow:0 8px 26px -12px rgba(34,50,68,.18)}
.toolbar{top:14px;left:50%;transform:translateX(-50%);width:max-content;display:flex;align-items:center;gap:4px;padding:5px;max-width:calc(100% - 28px);flex-wrap:wrap;justify-content:center}
.toolbar .divider{width:1px;height:20px;background:var(--line-2);margin:0 4px}
.toolbar .btn{height:30px;font-size:12px}
.toolbar .btn.icon{width:30px}
.toolbar .btn.active{background:var(--lime-soft);border-color:var(--lime-line);color:var(--lime)}
.toolbar label{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted);padding-left:6px}
.toolbar select{height:30px;width:72px;font-size:12px;font-family:var(--mono)}
.hud{left:14px;bottom:14px;padding:9px 12px;display:flex;flex-direction:column;gap:5px;width:min(300px,calc(100% - 28px))}
.hud .mono{font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hud-row{display:flex;align-items:center;gap:8px;font-size:11.5px;color:var(--text-2)}
.hud-row .eyebrow{min-width:52px}
.hud-status{color:var(--muted);font-size:11px;line-height:1.5}
.legend{right:14px;bottom:14px;padding:10px 12px;display:grid;gap:7px;font-size:11px;color:var(--text-2)}
.legend span{display:flex;align-items:center;gap:8px}
.legend i{width:14px;height:4px;border-radius:2px;display:inline-block}
.zoom{right:14px;top:14px;display:flex;flex-direction:column;padding:4px;gap:2px}
.zoom .btn{width:30px;height:30px;padding:0;border:0;background:transparent}
.zoom .btn:hover{background:var(--panel-3)}
.zoom .zoom-level{font-family:var(--mono);font-size:10px;color:var(--muted);text-align:center;padding:2px 0}
:root[data-theme="light"] .zoom .btn{color:var(--text-2)}
:root[data-theme="light"] .zoom .btn:hover{background:var(--panel-3);color:var(--text)}

.footnote{display:flex;align-items:center;gap:10px;padding:8px 18px;font-size:11px;color:#a89c7e;background:#12110d;border-top:1px solid #2a261b;flex-shrink:0;line-height:1.45}
:root[data-theme="light"] .footnote{color:#655325;background:#f6f1e2;border-color:#e4d9b9}
.footnote svg{width:14px;height:14px;flex-shrink:0;color:var(--warn)}