/* ───────────────────────── theme variables ───────────────────────── */
:root[data-theme="light"] {
  --bg: #ffffff;
  --fg: #20242b;
  --muted: #5a6472;
  --faint: #8a93a1;
  --panel: #f6f7f9;
  --panel-2: #eef1f5;
  --border: #d6dce4;
  --hover: #e9edf3;
  --input-bg: #ffffff;
  --input-border: #cfd6df;
  --accent: #2f6bd8;
  --accent-fg: #ffffff;
  --kbd-bg: #eceff4;
  --kbd-border: #cdd4dd;
  --scroll: #c4ccd6;
  --shadow: 0 6px 22px rgba(20, 30, 50, .14);
  --chrome-bg: #eceef3;       /* chrome follows the theme */
  --chrome-fg: #20242b;
  --chrome-muted: #5a6472;
  --chrome-border: #d3d9e1;
  --chrome-hover: #dfe4ec;
  --omni-bg: rgba(0, 0, 0, .05);
}
:root[data-theme="dark"] {
  --bg: #1b1e24;
  --fg: #d8dee9;
  --muted: #9aa5b5;
  --faint: #6b7585;
  --panel: #21252d;
  --panel-2: #262b33;
  --border: #2c323d;
  --hover: #2c323d;
  --input-bg: #1b1e24;
  --input-border: #3a4150;
  --accent: #5b8def;
  --accent-fg: #0e1726;
  --kbd-bg: #2c323d;
  --kbd-border: #3a4150;
  --scroll: #3a4150;
  --shadow: 0 6px 22px rgba(0, 0, 0, .5);
  --chrome-bg: #23272f;
  --chrome-fg: #e7ebf2;
  --chrome-muted: #9aa5b5;
  --chrome-border: #10131a;
  --chrome-hover: #333a45;
  --omni-bg: rgba(255, 255, 255, .12);
}

:root { --ui-scale: 1.2; }   /* overall UI zoom; canvas matches via render.js */

* { box-sizing: border-box; }
[hidden] { display: none !important; }
/* The whole app is rendered at --ui-scale via CSS zoom on the root, which behaves
   like browser zoom: it always fills the viewport (no edge gap) and reports
   visual coordinates for events/getBoundingClientRect. The canvas matches by
   multiplying its own constants by the same factor (see render.js); the tooltip
   divides mouse coords by the scale when positioning (see main.js). */
html { zoom: var(--ui-scale); }
html, body {
  margin: 0; padding: 0; height: 100%; overflow: hidden;
  font-family: Roboto, "Segoe UI", system-ui, sans-serif;
  background: var(--bg); color: var(--fg);
  font-size: 13px;
}
#app { width: 100%; height: 100%; display: flex; flex-direction: column; }
kbd {
  font-family: "Roboto Mono", ui-monospace, monospace; font-size: 10.5px;
  background: var(--kbd-bg); border: 1px solid var(--kbd-border);
  border-radius: 3px; padding: 0 4px; line-height: 1.5; color: var(--muted);
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--scroll); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }

/* ───────────────────────── top bar ───────────────────────── */
#topbar {
  display: flex; align-items: center; gap: 10px;
  height: 48px; flex: 0 0 48px; padding: 0 12px;
  background: var(--chrome-bg); color: var(--chrome-fg);
  border-bottom: 1px solid var(--chrome-border);
  z-index: 50;
}
#logo {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 15px; letter-spacing: .2px; color: var(--chrome-fg);
}
.logo-mark {
  width: 16px; height: 16px; border-radius: 3px; flex: 0 0 16px;
  background:
    linear-gradient(#5b8def, #5b8def) 0 1px/13px 3px no-repeat,
    linear-gradient(#e0a458, #e0a458) 3px 6px/13px 3px no-repeat,
    linear-gradient(#67b26f, #67b26f) 1px 11px/9px 3px no-repeat;
}
.logo-mark.big { width: 26px; height: 26px;
  background:
    linear-gradient(#5b8def, #5b8def) 0 3px/22px 5px no-repeat,
    linear-gradient(#e0a458, #e0a458) 5px 11px/21px 5px no-repeat,
    linear-gradient(#67b26f, #67b26f) 2px 19px/15px 5px no-repeat;
}

#omnibox {
  display: flex; align-items: center; gap: 8px;
  flex: 1 1 auto; max-width: 620px; margin-left: 8px;
  background: var(--omni-bg); border: 1px solid transparent;
  border-radius: 7px; padding: 0 10px; height: 32px;
  transition: background .12s, border-color .12s;
}
#omnibox:focus-within { background: var(--bg); border-color: var(--accent); }
#omnibox:focus-within .omni-icon,
#omnibox:focus-within #search { color: var(--fg); }
#omnibox:focus-within #search::placeholder { color: var(--faint); }
.omni-icon { color: var(--chrome-muted); flex: 0 0 16px; }
#search {
  flex: 1 1 auto; background: none; border: none; outline: none;
  color: var(--chrome-fg); font-size: 13px; font-family: inherit;
}
#search::placeholder { color: var(--chrome-muted); }
#search:disabled { cursor: not-allowed; }
.omni-nav {
  flex: 0 0 auto; width: 20px; height: 22px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: none; border-radius: 4px;
  color: var(--chrome-muted); font-size: 17px; line-height: 1; cursor: pointer;
}
.omni-nav:hover:not(:disabled) { background: var(--chrome-hover); color: var(--chrome-fg); }
.omni-nav:disabled { opacity: .35; cursor: default; }
#omnibox:focus-within .omni-nav { color: var(--muted); }
#omnibox:focus-within .omni-nav:hover:not(:disabled) { background: var(--hover); color: var(--fg); }
.omni-pos {
  flex: 0 0 auto; width: 40px; text-align: right;
  background: transparent; border: none; border-bottom: 1px solid transparent;
  color: var(--chrome-fg); font-size: 12px; font-family: "Roboto Mono", monospace;
  padding: 1px 2px; outline: none;
}
.omni-pos::placeholder { color: var(--chrome-muted); }
.omni-pos:hover:not(:disabled), .omni-pos:focus { border-bottom-color: var(--accent); }
.omni-pos:disabled { opacity: .4; }
#omnibox:focus-within .omni-pos { color: var(--fg); }
#search-info { color: var(--chrome-muted); font-size: 11.5px; white-space: nowrap; flex: 0 0 auto; }
#omnibox:focus-within #search-info { color: var(--muted); }
.topbar-spacer { flex: 0 1 8px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 6px;
  background: transparent; border: none; color: var(--chrome-fg);
  cursor: pointer; font-size: 13px;
}
.icon-btn:hover { background: var(--chrome-hover); }
#theme-toggle .ico-moon { display: none; }
:root[data-theme="dark"] #theme-toggle .ico-sun { display: none; }
:root[data-theme="dark"] #theme-toggle .ico-moon { display: inline; }

/* dropdown menu (palette picker) */
.menu-anchor { position: relative; display: inline-flex; }
.menu {
  position: absolute; top: calc(100% + 6px); right: 0; z-index: 70;
  min-width: 230px; padding: 5px;
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 9px; box-shadow: var(--shadow);
}
.menu-item {
  display: flex; align-items: center; gap: 8px; width: 100%;
  background: none; border: none; color: var(--fg); cursor: pointer;
  padding: 7px 8px; border-radius: 6px; font-size: 12.5px; font-family: inherit; text-align: left;
}
.menu-item:hover { background: var(--hover); }
.menu-item .check { width: 12px; flex: 0 0 12px; color: var(--accent); }
.menu-item .pal-name { font-weight: 500; }
.menu-item .pal-right { margin-left: auto; display: flex; align-items: center; gap: 9px; }
.menu-item .pal-sws { display: inline-flex; gap: 2px; }
.menu-item .pal-sw { width: 9px; height: 13px; border-radius: 2px; }
.menu-item .pal-hint { color: var(--faint); font-size: 11px; min-width: 44px; text-align: right; }

.btn {
  background: var(--chrome-hover); color: var(--chrome-fg);
  border: 1px solid transparent; border-radius: 6px;
  padding: 6px 14px; font-size: 13px; font-family: inherit; cursor: pointer;
  white-space: nowrap;
}
.btn:hover { filter: brightness(1.12); }
.btn.primary { background: var(--accent); color: var(--accent-fg); font-weight: 500; }
.btn.sm { padding: 4px 12px; font-size: 12px; }
/* primary/btn inside the light content area need readable colors */
#landing .btn { background: var(--panel-2); color: var(--fg); border: 1px solid var(--border); }
#landing .btn:hover { background: var(--hover); }
#landing .btn.primary { background: var(--accent); color: var(--accent-fg); border-color: transparent; }

/* ───────────────────────── body / sidebar ───────────────────────── */
#main { flex: 1 1 auto; display: flex; min-height: 0; }
#sidebar {
  flex: 0 0 240px; width: 240px; position: relative;
  background: var(--chrome-bg); color: var(--chrome-fg);
  border-right: 1px solid var(--chrome-border);
  display: flex; flex-direction: column; min-height: 0;
}
#sidebar.collapsing { transition: margin-left .16s ease, flex-basis .16s ease, width .16s ease; }
body.sidebar-collapsed #sidebar { margin-left: calc(-1px - var(--sidebar-w, 240px)); }
#sidebar-resize {
  position: absolute; top: 0; right: -3px; width: 7px; height: 100%;
  cursor: ew-resize; z-index: 5;
}
#sidebar-resize:hover { background: var(--accent); opacity: .5; }
body.sidebar-collapsed #sidebar-resize { display: none; }
.side-scroll { flex: 1 1 auto; overflow-y: auto; padding: 6px 0; }
.side-section { padding: 8px 0; border-bottom: 1px solid var(--chrome-border); }
.side-section:last-child { border-bottom: none; }
.side-head {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .9px;
  color: var(--chrome-muted); padding: 2px 14px 6px;
}
.side-item {
  display: flex; align-items: center; gap: 9px; width: 100%;
  background: none; border: none; color: var(--chrome-fg);
  padding: 7px 14px; font-size: 13px; font-family: inherit;
  cursor: pointer; text-align: left;
}
.side-item:hover { background: var(--chrome-hover); }
.side-item kbd { margin-left: auto; }
.si-ico { width: 18px; text-align: center; opacity: .85; }
#side-stats {
  padding: 2px 14px 8px; font-size: 12px; color: var(--chrome-muted); line-height: 1.7;
}
#side-stats b { color: var(--chrome-fg); font-weight: 500; }
#side-stats .fn {
  color: var(--chrome-fg); font-family: "Roboto Mono", monospace; font-size: 11px;
  word-break: break-all; display: block; margin-bottom: 4px;
}
.side-help { padding: 0 14px; font-size: 12px; color: var(--chrome-muted); line-height: 2; }
.side-note { padding: 0 14px; margin: 2px 0; font-size: 12px; color: var(--chrome-muted); line-height: 1.55; }
.badge-x { color: var(--accent); font-family: "Roboto Mono", monospace; }
.side-foot {
  flex: 0 0 auto; padding: 9px 14px; border-top: 1px solid var(--chrome-border);
  font-size: 11px;
}
.side-foot a { color: var(--chrome-muted); text-decoration: none; }
.side-foot a:hover { color: var(--accent); }

/* ───────────────────────── content / canvas ───────────────────────── */
#content { flex: 1 1 auto; position: relative; display: flex; flex-direction: column; min-width: 0; min-height: 0; }
#viewer { position: relative; flex: 1 1 auto; display: flex; flex-direction: column; min-height: 0; }
#minimap { width: 100%; height: 48px; flex: 0 0 48px; background: var(--panel); cursor: crosshair; }
#timeline { width: 100%; flex: 1 1 auto; min-height: 0; outline: none; display: block; }

#tooltip {
  position: fixed; z-index: 60; pointer-events: none;
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 11px; font-size: 13px; max-width: 600px; box-shadow: var(--shadow);
}
#tooltip .tt-name { font-weight: 600; margin-bottom: 2px; word-break: break-all; }
#tooltip .tt-row { color: var(--muted); }
#tooltip .tt-row b { color: var(--fg); font-weight: 500; }
#tooltip .tt-sw { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; vertical-align: baseline; }

/* ───────────────────────── bottom drawer ───────────────────────── */
#drawer {
  flex: 0 0 auto; height: 240px; min-height: 80px;
  background: var(--panel); border-top: 1px solid var(--border);
  display: flex; flex-direction: column; position: relative; z-index: 20;
}
#drawer-resize { position: absolute; top: -3px; left: 0; right: 0; height: 7px; cursor: ns-resize; z-index: 21; }
#drawer-tabs {
  display: flex; align-items: stretch; height: 34px; flex: 0 0 34px;
  background: var(--panel-2); border-bottom: 1px solid var(--border);
}
#drawer-tabs .tab {
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--muted); padding: 0 16px; font-size: 12.5px; font-family: inherit; cursor: pointer;
}
#drawer-tabs .tab:hover { color: var(--fg); }
#drawer-tabs .tab.active { color: var(--fg); border-bottom-color: var(--accent); }
.tab-spacer { flex: 1 1 auto; }
#drawer-tabs .icon-btn { color: var(--muted); align-self: center; }
#drawer-tabs .icon-btn:hover { background: var(--hover); color: var(--fg); }
#drawer-body { flex: 1 1 auto; overflow: auto; }
.tab-pane { padding: 10px 14px; }
.sel-title {
  font-weight: 600; font-size: 13px; margin-bottom: 8px; word-break: break-all;
  display: flex; align-items: center; gap: 8px;
}
.sel-title .sw { width: 12px; height: 12px; border-radius: 3px; flex: 0 0 12px; }
.kv { border-collapse: collapse; width: 100%; }
.kv td {
  padding: 3px 14px 3px 0; vertical-align: top; border-bottom: 1px solid var(--border);
  font-family: "Roboto Mono", ui-monospace, monospace; font-size: 11.5px; word-break: break-all;
}
.kv td:first-child { color: var(--accent); white-space: nowrap; width: 1%; }
.empty { color: var(--faint); font-size: 12.5px; padding: 6px 0; }
.flow-list { list-style: none; margin: 0; padding: 0; }
.flow-list li {
  padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 12px;
  display: flex; align-items: center; gap: 8px; cursor: pointer;
}
.flow-list li:hover { color: var(--accent); }
.flow-dir { color: var(--faint); font-family: "Roboto Mono", monospace; flex: 0 0 auto; }
.flow-name { font-family: "Roboto Mono", monospace; word-break: break-all; }

/* ───────────────────────── landing screen ───────────────────────── */
#landing {
  position: absolute; inset: 0; z-index: 40;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); overflow: auto; padding: 24px;
}
#landing.dragging { outline: 3px dashed var(--accent); outline-offset: -10px; }
#drop-card { width: 100%; max-width: 600px; text-align: center; }
#drop-card h1 {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin: 0 0 6px; font-size: 30px; color: var(--fg);
}
#drop-card .tagline { font-size: 15px; margin: 0 0 4px; }
#drop-card p { color: var(--muted); margin: 4px 0; line-height: 1.5; }
#drop-card code { background: var(--panel-2); padding: 1px 6px; border-radius: 4px; font-family: "Roboto Mono", monospace; font-size: .9em; }
.drop-zone {
  margin: 22px 0 10px; padding: 26px 20px;
  border: 2px dashed var(--border); border-radius: 12px; background: var(--panel);
}
.drop-zone .big { font-size: 17px; color: var(--fg); margin: 0 0 2px; }
.drop-actions { margin-top: 16px; display: flex; gap: 10px; justify-content: center; }
.dim { color: var(--faint) !important; font-size: 12px; }
.foot { margin-top: 14px !important; }

#picker { margin-top: 18px; text-align: left; }
#picker h3 { font-size: 13px; margin: 0 0 8px; color: var(--fg); }
#picker-list {
  max-height: 240px; overflow: auto; border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 10px; font-size: 12px; font-family: "Roboto Mono", monospace; background: var(--panel);
}
#picker-list label { display: flex; gap: 9px; padding: 3px 0; cursor: pointer; align-items: baseline; }
#picker-list .sz { color: var(--faint); margin-left: auto; padding-left: 14px; }
#picker-actions { margin-top: 10px; display: flex; gap: 8px; justify-content: flex-end; }
#status { margin-top: 16px; color: var(--accent); font-size: 13px; min-height: 18px; white-space: pre-wrap; }
#status.error { color: #e06c75; }

/* ───────────────────────── about / credits modal ───────────────────────── */
#about-modal {
  position: fixed; inset: 0; z-index: 80;
  display: flex; align-items: center; justify-content: center;
  background: rgba(8, 10, 14, .55); padding: 24px;
}
#about-card {
  position: relative; width: 100%; max-width: 560px; max-height: 86vh; overflow: auto;
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--border); border-radius: 12px;
  padding: 24px 26px; box-shadow: var(--shadow);
}
#about-card h2 {
  display: flex; align-items: center; gap: 11px; margin: 0 0 8px; font-size: 22px;
}
#about-card h3 {
  margin: 18px 0 6px; font-size: 13px; text-transform: uppercase; letter-spacing: .8px;
  color: var(--muted);
}
#about-card p { margin: 6px 0; line-height: 1.55; color: var(--fg); }
#about-card .about-tag { color: var(--muted); }
#about-card .about-note { color: var(--muted); font-size: 12.5px; }
#about-card a { color: var(--accent); text-decoration: none; }
#about-card a:hover { text-decoration: underline; }
.about-list { margin: 6px 0; padding-left: 20px; line-height: 1.6; }
.about-list li { margin: 5px 0; color: var(--fg); }
.about-foot {
  margin-top: 18px !important; padding-top: 12px; border-top: 1px solid var(--border);
  font-size: 12px; color: var(--faint) !important;
}
#about-card #about-close {
  position: absolute; top: 12px; right: 12px; color: var(--muted);
}
#about-card #about-close:hover { background: var(--hover); color: var(--fg); }