:root {
  --navy: #07111f;
  --navy-2: #0b1b30;
  --surface: #10263e;
  --surface-2: #153452;
  --line: rgba(175, 209, 235, .17);
  --line-strong: rgba(175, 209, 235, .32);
  --text: #eff7ff;
  --muted: #9eb3c7;
  --faint: #6c849b;
  --cyan: #42d6d2;
  --blue: #5ba7ff;
  --amber: #f7bd61;
  --violet: #b897ff;
  --rose: #ff8897;
  --green: #7adf9a;
  --shadow: 0 18px 45px rgba(0, 0, 0, .18);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 1040px; background: var(--navy); color: var(--text); }
button, input, select { font: inherit; }
button { cursor: pointer; }
.app-header { height: 72px; display: flex; align-items: center; gap: 34px; padding: 0 26px; border-bottom: 1px solid var(--line); background: rgba(7,17,31,.92); }
.brand { color: var(--text); text-decoration: none; display: flex; align-items: center; gap: 10px; font-size: 20px; letter-spacing: -.4px; white-space: nowrap; }
.brand b { color: var(--cyan); font-weight: 720; }
.brand-mark { display: grid; grid-template-columns: repeat(3, 7px); gap: 3px; align-items: end; height: 21px; }
.brand-mark i { width: 7px; background: var(--cyan); border-radius: 3px; transform: skewY(-25deg); }
.brand-mark i:nth-child(1) { height: 11px; }.brand-mark i:nth-child(2) { height: 21px; }.brand-mark i:nth-child(3) { height: 15px; }
.model-title { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13px; flex: 1; }
.model-title input { background: transparent; border: 0; color: var(--text); font-size: 16px; font-weight: 650; width: 150px; outline: none; padding: 5px 2px; border-bottom: 1px solid transparent; }
.model-title input:focus { border-bottom-color: var(--cyan); }
.dirty-dot { width: 7px; height: 7px; border-radius: 50%; background: transparent; }.dirty-dot.visible { background: var(--amber); box-shadow: 0 0 0 3px rgba(247,189,97,.12); }
.header-actions { display: flex; align-items: center; gap: 9px; }
.button { border: 1px solid var(--line-strong); background: var(--surface); color: var(--text); border-radius: 8px; padding: 9px 13px; font-size: 13px; font-weight: 600; transition: .15s ease; white-space: nowrap; }
.button:hover { border-color: var(--cyan); transform: translateY(-1px); }.button.primary { background: var(--cyan); color: #06222d; border-color: var(--cyan); }.button.primary:hover { filter: brightness(1.08); }.button.secondary { background: transparent; }.button.compact { padding: 6px 10px; font-size: 12px; }
.upload-button input { display: none; }
.workspace { display: grid; grid-template-columns: 254px minmax(520px,1fr) 315px; gap: 14px; padding: 14px; height: calc(100vh - 72px); }
.panel { border: 1px solid var(--line); background: linear-gradient(145deg, rgba(19,47,75,.88), rgba(10,29,49,.88)); border-radius: 11px; box-shadow: var(--shadow); }
.tree-panel, .right-rail { min-height: 0; }.tree-panel { display: flex; flex-direction: column; overflow: hidden; }.right-rail { display: flex; flex-direction: column; gap: 14px; overflow: auto; }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; padding: 18px 17px 13px; border-bottom: 1px solid var(--line); }.panel-heading.small { padding: 15px 16px 11px; }
.eyebrow { color: var(--cyan); font-size: 10px; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 5px; }
h1, h2 { font-size: 16px; margin: 0; letter-spacing: -.2px; } h2 { font-size: 15px; }
.icon-button { width: 29px; height: 29px; border-radius: 7px; border: 1px solid var(--line-strong); background: rgba(255,255,255,.04); color: var(--text); font-size: 20px; line-height: 1; display: grid; place-items: center; }.icon-button:hover { border-color: var(--cyan); color: var(--cyan); }.icon-button.danger:hover { color: var(--rose); border-color: var(--rose); }
.tree { overflow: auto; padding: 10px 7px 18px; flex: 1; }.tree-node { user-select: none; }.tree-row { display: flex; align-items: center; gap: 7px; padding: 7px 8px; color: var(--muted); border-radius: 7px; font-size: 13px; cursor: pointer; }.tree-row:hover { background: rgba(255,255,255,.055); color: var(--text); }.tree-row.active { background: rgba(66,214,210,.13); color: #e8ffff; }.tree-indent { margin-left: 16px; border-left: 1px solid rgba(175,209,235,.12); padding-left: 5px; }.tree-caret { color: var(--faint); width: 10px; font-size: 11px; }.tree-icon { width: 20px; height: 20px; border-radius: 5px; display: grid; place-items: center; font-size: 11px; font-weight: 800; }.type-system { background: rgba(66,214,210,.18); color: var(--cyan); }.type-block { background: rgba(91,167,255,.16); color: var(--blue); }.type-process { background: rgba(184,151,255,.16); color: var(--violet); }.type-procedure { background: rgba(247,189,97,.16); color: var(--amber); }.type-state { background: rgba(122,223,154,.16); color: var(--green); }
.tree-row small { margin-left: auto; color: var(--faint); font-size: 10px; }.tree-footer { padding: 11px 16px; border-top: 1px solid var(--line); }.text-button { color: var(--muted); border: 0; background: transparent; padding: 0; font-size: 12px; }.text-button:hover { color: var(--cyan); }
.main-panel { min-width: 0; display: grid; grid-template-rows: auto minmax(0,1fr); gap: 14px; }.canvas-toolbar { display: flex; justify-content: space-between; align-items: center; padding: 9px 12px 9px 16px; min-height: 51px; }.breadcrumb { display: flex; gap: 7px; align-items: center; color: var(--muted); font-size: 12px; }.breadcrumb strong { color: var(--text); font-weight: 650; }.breadcrumb .crumb-type { color: var(--cyan); background: rgba(66,214,210,.09); padding: 4px 7px; border-radius: 5px; font-size: 10px; text-transform: uppercase; font-weight: 750; letter-spacing: .06em; }.view-options { display: flex; gap: 8px; align-items: center; }.view-options .icon-button { width: 29px; height: 29px; font-size: 18px; }
.diagram { min-height: 0; position: relative; overflow: auto; padding: 26px; background-image: radial-gradient(rgba(147,190,221,.18) 1px, transparent 1px); background-size: 22px 22px; }.diagram-empty { height: 100%; min-height: 330px; display: grid; place-content: center; text-align: center; color: var(--muted); }.diagram-empty strong { color: var(--text); font-size: 17px; margin-bottom: 7px; }
.system-diagram { position: relative; min-width: 650px; min-height: 440px; height: 100%; }.diagram-label { position: absolute; top: 0; left: 0; color: var(--faint); font-size: 11px; letter-spacing: .09em; text-transform: uppercase; font-weight: 700; }.connection-layer { position: absolute; inset: 0; z-index: 0; overflow: visible; pointer-events: none; }.connection-line { stroke: rgba(66,214,210,.82); stroke-width: 2; fill: none; }.connection-line.dual { stroke-dasharray: 5 4; }.connection-label { fill: var(--cyan); font-size: 11px; font-weight: 650; paint-order: stroke; stroke: var(--navy-2); stroke-width: 5px; stroke-linejoin: round; }.channel-link { cursor: pointer; pointer-events: all; }.connection-hit { fill: none; stroke: transparent; stroke-width: 18; pointer-events: stroke; }.channel-link:hover .connection-line { stroke: var(--text); stroke-width: 3; }.channel-link.selected .connection-line { stroke: var(--rose); stroke-width: 4; }.channel-link.selected .connection-label { fill: var(--rose); }
.agent-card { position: absolute; z-index: 2; width: 174px; min-height: 92px; border: 1px solid var(--line-strong); border-top: 3px solid var(--blue); background: rgba(12,31,52,.96); border-radius: 9px; padding: 12px; cursor: pointer; box-shadow: 0 9px 24px rgba(0,0,0,.2); transition: .15s ease; }.agent-card:hover { transform: translateY(-2px); border-color: var(--cyan); }.agent-card.selected { outline: 2px solid var(--cyan); outline-offset: 3px; }.agent-card .card-kind { color: var(--blue); font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .09em; }.agent-card strong { display: block; font-size: 15px; margin: 7px 0 7px; overflow-wrap: anywhere; }.agent-card small { color: var(--muted); font-size: 11px; }
.block-diagram { min-width: 520px; min-height: 100%; height: max-content; }.block-header { display: flex; justify-content: space-between; margin-bottom: 30px; }.block-header strong { font-size: 20px; }.block-header span { color: var(--blue); font-size: 12px; }.process-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; }.process-card { min-height: 160px; border: 1px solid rgba(184,151,255,.45); background: rgba(16,33,57,.9); border-radius: 10px; padding: 16px; cursor: pointer; }.process-card:hover { border-color: var(--cyan); }.process-card .card-top { color: var(--violet); font-size: 10px; text-transform: uppercase; letter-spacing: .1em; font-weight: 800; }.process-card strong { display: block; font-size: 18px; margin: 8px 0; }.process-card p { color: var(--muted); font-size: 12px; margin: 0 0 15px; }.state-pills { display: flex; flex-wrap: wrap; gap: 5px; }.state-pill { padding: 3px 7px; color: var(--green); background: rgba(122,223,154,.12); border-radius: 20px; font-size: 10px; }
.block-channels { margin: -8px 0 24px; }.block-channel-list { display: flex; flex-wrap: wrap; gap: 9px; }.block-channel { display: flex; align-items: center; gap: 8px; min-width: 175px; border: 1px solid rgba(66,214,210,.35); border-radius: 7px; padding: 8px 10px; color: var(--text); background: rgba(66,214,210,.06); text-align: left; }.block-channel:hover { border-color: var(--cyan); background: rgba(66,214,210,.13); }.block-channel .sdl-icon { color: var(--cyan); flex: 0 0 auto; }.block-channel strong { display: block; font-size: 12px; }.block-channel small { display: block; color: var(--muted); font-size: 10px; margin-top: 2px; }
.process-diagram { min-width: 760px; min-height: 100%; height: max-content; }.process-summary { display: flex; gap: 14px; margin-bottom: 24px; }.summary-card { min-width: 160px; padding: 11px 13px; border-radius: 8px; background: rgba(255,255,255,.045); border: 1px solid var(--line); }.summary-card span { display: block; color: var(--faint); font-size: 10px; letter-spacing: .07em; text-transform: uppercase; }.summary-card strong { display: block; margin-top: 4px; font-size: 13px; color: var(--text); }
.flow-area { display: flex; gap: 26px; align-items: flex-start; padding: 5px; }.start-flow { width: 170px; flex: 0 0 170px; }.flow-title { color: var(--cyan); font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 11px; }.states-flow { display: flex; gap: 22px; flex-wrap: wrap; align-items: flex-start; }.state-card { width: 236px; border: 1px solid rgba(122,223,154,.38); background: rgba(10,30,49,.95); border-radius: 10px; padding: 0 12px 12px; cursor: pointer; }.state-card:hover { border-color: var(--cyan); }.state-title { margin: 0 -12px 11px; padding: 10px 12px; border-bottom: 1px solid rgba(122,223,154,.23); color: var(--green); font-size: 13px; font-weight: 750; }.flow-stack { display: flex; flex-direction: column; align-items: center; }.flow-node { width: 100%; position: relative; border-radius: 5px; padding: 7px 8px; margin-bottom: 18px; font-size: 11px; border: 1px solid; background: rgba(255,255,255,.05); color: var(--text); min-height: 32px; overflow-wrap: anywhere; }.flow-node::after { content: "↓"; position: absolute; bottom: -20px; left: calc(50% - 4px); color: var(--faint); font-size: 13px; }.flow-node:last-child { margin-bottom: 0; }.flow-node:last-child::after { display: none; }.node-input { border-color: rgba(91,167,255,.55); }.node-output { border-color: rgba(247,189,97,.6); }.node-task { border-color: rgba(184,151,255,.55); }.node-setstate { border-color: rgba(122,223,154,.55); }.node-decision { transform: rotate(0deg); border-color: rgba(255,136,151,.63); }.node-procedurecall { border-color: rgba(66,214,210,.6); }.node-return { border-color: rgba(247,189,97,.65); }.flow-node .kind { display: block; color: var(--muted); text-transform: uppercase; font-size: 9px; font-weight: 750; letter-spacing: .08em; margin-bottom: 3px; }.start-node { border-radius: 50%; width: 76px; height: 76px; display: grid; place-content: center; text-align: center; border: 2px solid var(--cyan); color: var(--cyan); background: rgba(66,214,210,.1); font-size: 11px; font-weight: 750; margin: 9px auto 20px; }.procedure-diagram { min-width: 500px; min-height: 100%; height: max-content; }.procedure-head { display: flex; gap: 28px; align-items: flex-start; margin-bottom: 24px; }.procedure-head strong { display: block; font-size: 20px; }.procedure-head p { margin: 5px 0 0; color: var(--muted); font-size: 12px; }.param-list { display: flex; flex-wrap: wrap; gap: 6px; }.param-chip { background: rgba(247,189,97,.11); color: var(--amber); font-size: 11px; padding: 4px 8px; border-radius: 15px; }.procedure-flow { width: 260px; margin: 0 auto; }.flow-node.clickable { cursor: pointer; }.flow-node.clickable:hover { border-color: var(--cyan); }
.palette-panel { flex: 0 0 auto; }.panel-copy { color: var(--muted); font-size: 12px; line-height: 1.45; padding: 0 16px; margin: 14px 0; }.palette { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 0 14px 15px; }.palette-item { display: flex; align-items: center; gap: 8px; padding: 9px 8px; border: 1px solid var(--line); border-radius: 7px; color: var(--muted); background: rgba(255,255,255,.025); text-align: left; font-size: 11px; font-weight: 600; }.palette-item:hover { border-color: var(--cyan); color: var(--text); background: rgba(66,214,210,.07); }.palette-glyph { width: 19px; height: 19px; display: grid; place-items: center; font-size: 12px; border-radius: 4px; background: rgba(255,255,255,.08); color: var(--cyan); }
.flow-node.selected { border-color: var(--cyan); box-shadow: 0 0 0 2px rgba(66,214,210,.16); background: rgba(66,214,210,.1); }
.tree-icon .sdl-icon { width: 15px; height: 13px; }
.palette-glyph { width: 24px; background: transparent; }
.sdl-icon { width: 23px; height: 17px; display: block; overflow: visible; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: square; stroke-linejoin: miter; }

/* SDL graphical symbols based on ITU-T Z.100. */
.state-card { border: 1px dashed rgba(122,223,154,.35); border-radius: 7px; background: rgba(10,30,49,.62); padding: 10px 12px 12px; }
.state-title { margin: -2px 0 13px; padding: 8px 12px; border: 1.5px solid var(--green); border-radius: 999px; background: rgba(122,223,154,.08); text-align: center; }
.state-title small { color: rgba(122,223,154,.72); }
.flow-node { border-radius: 0; min-height: 38px; padding: 7px 10px; margin-bottom: 22px; border-width: 1.5px; }
.flow-node::after { bottom: -23px; font-size: 14px; }
.node-input { clip-path: polygon(0 0,100% 0,100% 100%,0 100%,14% 50%); padding-left: 34px; border-color: rgba(91,167,255,.88); background: rgba(91,167,255,.1); }
.node-output { clip-path: polygon(0 0,84% 0,100% 50%,84% 100%,0 100%); padding-right: 31px; border-color: rgba(247,189,97,.9); background: rgba(247,189,97,.09); }
.node-task { border-color: rgba(184,151,255,.86); }
.node-procedurecall { border-color: rgba(66,214,210,.9); padding-left: 17px; padding-right: 17px; background-image: linear-gradient(90deg,transparent 5px,rgba(66,214,210,.72) 5px,rgba(66,214,210,.72) 6px,transparent 6px,transparent calc(100% - 6px),rgba(66,214,210,.72) calc(100% - 6px),rgba(66,214,210,.72) calc(100% - 5px),transparent calc(100% - 5px)); }
.node-setstate { width: 84%; min-height: 40px; border-radius: 999px; padding: 8px 16px; border-color: rgba(122,223,154,.9); background: rgba(122,223,154,.1); text-align: center; }
.node-decision { width: 180px; min-height: 86px; clip-path: polygon(50% 0,100% 50%,50% 100%,0 50%); border-color: rgba(255,136,151,.92); padding: 23px 36px; background: rgba(255,136,151,.1); text-align: center; display: flex; flex-direction: column; justify-content: center; }
.node-decision .kind { margin-bottom: 3px; }
.node-return { width: 52px; min-height: 52px; height: 52px; padding: 0; border-radius: 50%; border-color: rgba(247,189,97,.92); background: rgba(247,189,97,.08); font-size: 0; display: grid; place-items: center; }
.node-return::before { content: "×"; color: var(--amber); font-size: 44px; font-weight: 200; line-height: 1; }
.node-return .kind { display: none; }
.start-node { width: 116px; height: 48px; border-radius: 999px; border-width: 1.5px; margin-bottom: 24px; }
.state-card > .flow-stack { align-items: flex-start; }
.state-card > .flow-stack > .flow-node { width: 210px; }
.decision-layout { width: max-content; min-width: 0; margin: 4px 0 28px; }
.decision-branches { display: grid; grid-template-columns: repeat(var(--decision-columns, 2), 210px); gap: 18px; position: relative; align-items: start; }
.decision-branches::before { content: ""; position: absolute; top: 43px; left: 150px; right: 105px; border-top: 1.5px solid rgba(255,136,151,.7); }
.decision-branch { position: relative; min-width: 0; padding-top: 104px; }
.decision-branch:not(.decision-primary)::before { content: ""; position: absolute; top: 43px; left: 50%; height: 61px; border-left: 1.5px solid rgba(255,136,151,.7); }
.decision-primary { padding-top: 0; }
.decision-primary .node-decision { margin-left: auto; margin-right: auto; margin-bottom: 14px; }
.decision-primary .node-decision::after { bottom: -20px; }
.decision-option { display: block; margin: 0 auto 11px; width: max-content; max-width: 100%; color: var(--rose); background: rgba(255,136,151,.1); border: 1px solid rgba(255,136,151,.35); border-radius: 999px; padding: 3px 8px; font-size: 9px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.decision-primary .decision-option { margin-top: 20px; }
.decision-branch-flow { width: 100%; align-items: stretch; }
.decision-branch-flow .flow-node { margin-bottom: 22px; }
.decision-branch-flow .node-decision { width: 154px; min-height: 76px; align-self: center; padding: 20px 30px; }
.decision-empty { min-height: 52px; display: grid; place-items: center; color: var(--faint); border: 1px dashed rgba(255,136,151,.45); border-radius: 5px; padding: 8px; font-size: 10px; text-align: center; }
.inspector { flex: 1 0 300px; }.inspector-form { padding: 4px 16px 18px; }.inspector-form label, .dialog label { color: var(--muted); display: block; font-size: 11px; font-weight: 650; margin-top: 12px; }.inspector-form label small, .dialog small { color: var(--faint); font-weight: 500; }.inspector-form input, .inspector-form select, .inspector-form textarea, .dialog input, .dialog select { display: block; width: 100%; margin-top: 6px; background: rgba(3,13,25,.45); border: 1px solid var(--line); color: var(--text); border-radius: 6px; padding: 8px 9px; outline: none; font-size: 12px; }.inspector-form textarea { resize: vertical; min-height: 64px; }.inspector-form input:focus, .inspector-form select:focus, .inspector-form textarea:focus, .dialog input:focus, .dialog select:focus { border-color: var(--cyan); }.form-section { color: var(--faint); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; font-weight: 800; border-top: 1px solid var(--line); padding-top: 14px; margin-top: 15px; }.attribute-note { color: var(--faint); font-size: 10px; padding-top: 11px; }
.dcl-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 7px; }
.xml-preview { position: absolute; z-index: 5; top: 65px; left: 14px; right: 14px; bottom: 14px; overflow: auto; background: #071321; }.xml-preview.hidden { display: none; }.xml-heading { display: flex; justify-content: space-between; align-items: center; padding: 13px 16px; border-bottom: 1px solid var(--line); }.xml-heading strong { font-size: 12px; }.xml-preview pre { margin: 0; padding: 16px; color: #b9d9ee; font: 12px/1.55 "Cascadia Code", Consolas, monospace; white-space: pre-wrap; }
.dialog { color: var(--text); width: min(480px, calc(100vw - 30px)); border: 1px solid var(--line-strong); background: #10263e; border-radius: 12px; padding: 0; box-shadow: 0 25px 70px rgba(0,0,0,.55); }.dialog::backdrop { background: rgba(1,8,17,.7); backdrop-filter: blur(2px); }.dialog form { padding: 18px; }.dialog-heading { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }.dialog h2 { font-size: 18px; }.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }.check-row { display: flex !important; gap: 8px; align-items: center; }.check-row input { width: auto !important; margin: 0 !important; accent-color: var(--cyan); }menu { display: flex; justify-content: flex-end; gap: 8px; padding: 0; margin: 20px 0 0; }.export-dialog { width: min(590px, calc(100vw - 30px)); }.export-list { border: 1px solid var(--line); border-radius: 8px; max-height: 340px; overflow: auto; }.export-item { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; border-bottom: 1px solid var(--line); }.export-item:last-child { border-bottom: 0; }.export-item strong { font-size: 12px; }.export-item small { display: block; margin-top: 3px; color: var(--faint); font-size: 10px; }
.toast { position: fixed; right: 20px; bottom: 20px; transform: translateY(15px); opacity: 0; pointer-events: none; background: #0b2639; border: 1px solid var(--cyan); color: var(--text); padding: 10px 14px; border-radius: 7px; font-size: 12px; box-shadow: var(--shadow); transition: .22s ease; }.toast.show { opacity: 1; transform: translateY(0); }
@media (max-width: 1120px) { body { min-width: 900px; }.workspace { grid-template-columns: 215px minmax(440px,1fr) 275px; gap: 10px; padding: 10px; }.app-header { gap: 18px; padding: 0 16px; }.header-actions .secondary { display: none; } }