:root {
  --bg: #f3f5f8;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --border: #d8dee7;
  --text: #24303f;
  --text-dim: #6b7686;
  --accent: #2f6fed;
  --accent-hover: #245cd1;
  --danger: #d94848;
  --ok: #2e9e5b;
  --warn: #b98a0c;
  --shadow: 0 8px 30px rgba(20, 30, 50, 0.18);
  --editor-bg: #ffffff;
}
body.dark {
  --bg: #181c23;
  --panel: #21262f;
  --panel-2: #1c2129;
  --border: #343c48;
  --text: #dbe2ec;
  --text-dim: #8b96a6;
  --accent: #3573e8;
  --accent-hover: #4a84f2;
  --danger: #e06060;
  --ok: #3fae6c;
  --warn: #d3a52e;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  --editor-bg: #1c2129;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Segoe UI", system-ui, Arial, sans-serif;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

button, input, select, textarea { font: inherit; color: inherit; }

/* ---------- topbar ---------- */
#appView { display: flex; flex-direction: column; height: 100vh; }
.topbar {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
  z-index: 20;
}
.brand { font-weight: 700; font-size: 15px; color: var(--accent); white-space: nowrap; user-select: none; }
.brand .lite { color: var(--text-dim); font-weight: 400; }

#diagramTitle {
  border: 1px solid transparent; background: transparent; border-radius: 6px;
  padding: 5px 8px; font-weight: 600; min-width: 120px; max-width: 320px; color: var(--text);
}
#diagramTitle:hover, #diagramTitle:focus { border-color: var(--border); background: var(--panel-2); outline: none; }

.savestate { font-size: 12px; color: var(--text-dim); min-width: 70px; }
.savestate.saving { color: var(--warn); }
.savestate.saved { color: var(--ok); }
.savestate.error { color: var(--danger); }

.spacer { flex: 1; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 12px; cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger:hover { border-color: var(--danger); color: var(--danger); }
.btn.small { padding: 3px 9px; font-size: 12.5px; }
.btn.icon { padding: 6px 9px; }
.btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.dropdown { position: relative; }
.dropdown-menu {
  position: absolute; top: calc(100% + 4px); right: 0; min-width: 190px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: var(--shadow); padding: 4px; display: none; z-index: 100;
}
.dropdown-menu.open { display: block; }
.dropdown-menu button {
  display: block; width: 100%; text-align: left; background: none; border: 0;
  padding: 8px 12px; border-radius: 6px; cursor: pointer; color: var(--text);
}
.dropdown-menu button:hover { background: var(--panel-2); color: var(--accent); }
.dropdown-menu hr { border: 0; border-top: 1px solid var(--border); margin: 4px 0; }

/* ---------- main split ---------- */
.main { display: flex; flex: 1 1 auto; min-height: 0; }
.editor-pane { display: flex; flex-direction: column; width: 420px; min-width: 220px; max-width: 70vw; background: var(--editor-bg); border-right: 1px solid var(--border); }
.editor-wrap { flex: 1 1 auto; min-height: 0; position: relative; }
.editor-wrap .CodeMirror { position: absolute; inset: 0; height: 100%; font-family: Consolas, "Cascadia Code", monospace; font-size: 13px; background: var(--editor-bg); color: var(--text); }

.splitter { width: 5px; cursor: col-resize; background: var(--border); flex: 0 0 auto; }
.splitter:hover { background: var(--accent); }

.canvas-pane { flex: 1 1 auto; position: relative; min-width: 0; }
#canvasHost { position: absolute; inset: 0; }

.canvas-controls {
  position: absolute; bottom: 14px; right: 14px; display: flex; gap: 6px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 5px; box-shadow: var(--shadow); z-index: 10; align-items: center;
}
.canvas-controls .zoom-label { font-size: 12px; color: var(--text-dim); width: 42px; text-align: center; }

/* ---------- error bar ---------- */
.error-bar {
  flex: 0 0 auto; max-height: 110px; overflow: auto;
  background: var(--panel-2); border-top: 1px solid var(--border);
  font-size: 12.5px; padding: 4px 0; display: none;
}
.error-bar.visible { display: block; }
.error-bar .err { padding: 3px 12px; color: var(--danger); cursor: pointer; }
.error-bar .err:hover { background: var(--panel); }
.error-bar .err .lnum { color: var(--text-dim); margin-right: 6px; }

/* ---------- login ---------- */
#loginView {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: var(--bg); z-index: 500;
}
.login-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); padding: 34px 38px; width: 340px;
}
.login-card h1 { margin: 0 0 4px; font-size: 22px; color: var(--accent); }
.login-card .sub { color: var(--text-dim); margin-bottom: 22px; font-size: 13px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 4px; }
.field input, .field select {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--panel-2); color: var(--text);
}
.field input:focus { outline: none; border-color: var(--accent); }
.login-error { color: var(--danger); font-size: 13px; min-height: 18px; margin-bottom: 8px; }

/* ---------- modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(10, 15, 25, 0.45);
  display: none; align-items: center; justify-content: center; z-index: 300;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); width: 640px; max-width: 94vw; max-height: 86vh;
  display: flex; flex-direction: column;
}
.modal header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: 15px;
}
.modal header .btn { font-size: 13px; }
.modal .modal-body { padding: 16px 18px; overflow: auto; }
.modal footer { padding: 12px 18px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

.list-table { width: 100%; border-collapse: collapse; }
.list-table th { text-align: left; font-size: 12px; color: var(--text-dim); padding: 6px 8px; border-bottom: 1px solid var(--border); }
.list-table td { padding: 8px; border-bottom: 1px solid var(--border); }
.list-table tr:hover td { background: var(--panel-2); }
.list-table .title-cell { cursor: pointer; font-weight: 600; color: var(--accent); }
.badge { display: inline-block; font-size: 11px; border-radius: 10px; padding: 1px 8px; background: var(--panel-2); border: 1px solid var(--border); color: var(--text-dim); }
.badge.shared { color: var(--ok); border-color: var(--ok); }

textarea.sql-input {
  width: 100%; height: 260px; resize: vertical;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
  font-family: Consolas, monospace; font-size: 12.5px; padding: 10px; color: var(--text);
}

/* ---------- toast ---------- */
#toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; box-shadow: var(--shadow); padding: 10px 18px;
  transition: transform 0.25s ease; z-index: 600; max-width: 70vw;
}
#toast.show { transform: translateX(-50%) translateY(0); }
#toast.error { border-color: var(--danger); color: var(--danger); }

/* ---------- CodeMirror dark overrides ---------- */
body.dark .CodeMirror { background: var(--editor-bg); color: #dbe2ec; }
body.dark .CodeMirror-gutters { background: #1a1f27; border-right: 1px solid var(--border); }
body.dark .CodeMirror-linenumber { color: #5c6775; }
body.dark .CodeMirror-cursor { border-left-color: #dbe2ec; }
body.dark .CodeMirror-activeline-background { background: #232a35; }
body.dark .CodeMirror-selected { background: #2c3a52; }
.cm-s-default .cm-keyword { color: #a626a4; font-weight: 600; }
.cm-s-default .cm-attribute { color: #986801; }
.cm-s-default .cm-type { color: #0184bc; }
.cm-s-default .cm-string, .cm-s-default .cm-string-2 { color: #50a14f; }
.cm-s-default .cm-comment { color: #a0a1a7; font-style: italic; }
.cm-s-default .cm-number { color: #c18401; }
.cm-s-default .cm-operator { color: #d94848; }
body.dark .cm-s-default .cm-keyword { color: #d488ee; }
body.dark .cm-s-default .cm-attribute { color: #e2b93e; }
body.dark .cm-s-default .cm-type { color: #56b6ff; }
body.dark .cm-s-default .cm-string, body.dark .cm-s-default .cm-string-2 { color: #7ec97d; }
body.dark .cm-s-default .cm-comment { color: #6b7686; }
body.dark .cm-s-default .cm-number { color: #e5c07b; }
body.dark .cm-s-default .cm-operator { color: #e06c75; }
body.dark .cm-s-default .cm-punctuation { color: #abb2bf; }

.hidden { display: none !important; }