/* /css/app.css */

/* =========================================================
   Phase 1 – Playground Planner
   Semantic theme-driven CSS (Light/Dark)
   ========================================================= */

/* =========================================================
   Theme variables (LIGHT default)
   ========================================================= */

:root {
  /* ---- UI surfaces ---- */
  --ui-bg: #f5f7fb;
  --ui-panel: #ffffff;
  --ui-panel-muted: #fafbfe;
  --ui-border: #e3e7ee;

  /* ---- Text ---- */
  --ui-text: #0f172a;
  --ui-text-muted: #6b7280;
  --ui-text-subtle: #9aa3b2;

  /* ---- Accents ---- */
  --ui-primary: #2563eb;
  --ui-primary-hover: #1d4ed8;
  --ui-danger: #dc2626;

  --ui-bm-active-bg: #6bade2;

  /* ---- Canvas ---- */
  --canvas-bg: #ffffff;
  --grid-line: #e5e7eb;

  /* ---- Geometry ---- */
  --boundary-stroke: #2563eb;
  --boundary-fill: rgba(37, 99, 235, 0.08);
  --hole-stroke: #dc2626;

  /* ---- Measurements ---- */
  --measure-line: #374151;
  --measure-text: #111827;
  --measure-bg: rgba(255, 255, 255, 0.85);
  --measure-border: #9ca3af;

  /* ---- Handles / selection ---- */
  --handle-dot: #2563eb;
  --handle-ring: rgba(239, 68, 68, 0.18);
  --handle-ring-stroke: rgba(239, 68, 68, 0.95);

  /* ---- Preview (elastic) ---- */
  --preview-stroke: #2563eb;

  /* ---- Controls (buttons, icons, kbd) ---- */
  --control-bg: #f3f5f9;
  --control-bg-hover: #edf1f7;
  --control-border: #d6dbe6;
  --control-border-strong: #c3cada;
  --control-text: #0f172a;
  --control-muted: #64748b;

  --kbd-bg: #f8fafc;
  --kbd-border: #cfd6e3;

  --focus-ring: rgba(37, 99, 235, 0.4);

  /* ---- Misc ---- */
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 6px 20px rgba(15,23,42,0.08);

  --font: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Arial, sans-serif;
}

/* =========================================================
   Dark theme overrides
   ========================================================= */

body[data-theme="dark"] {
  --ui-bg: #0b1220;
  --ui-panel: #0f172a;
  --ui-panel-muted: #111827;
  --ui-border: #1f2937;

  --ui-text: #e5e7eb;
  --ui-text-muted: #9ca3af;
  --ui-text-subtle: #6b7280;

  --canvas-bg: #020617;
  --grid-line: #1f2937;

  --boundary-stroke: #60a5fa;
  --boundary-fill: rgba(96, 165, 250, 0.12);

  --measure-line: #c7d2fe;
  --measure-text: #ffffff;
  --measure-bg: rgba(15, 23, 42, 0.9);
  --measure-border: #475569;

  /* ---- Controls (dark) ---- */
  --control-bg: rgba(255, 255, 255, 0.06);
  --control-bg-hover: rgba(255, 255, 255, 0.10);
  --control-border: rgba(255, 255, 255, 0.14);
  --control-border-strong: rgba(255, 255, 255, 0.22);
  --control-text: #e5e7eb;
  --control-muted: #cbd5e1;

  --kbd-bg: rgba(255, 255, 255, 0.07);
  --kbd-border: rgba(255, 255, 255, 0.18);

  --focus-ring: rgba(96, 165, 250, 0.45);
}

/* =========================================================
   Reset / base
   ========================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ui-text);
  background: var(--ui-bg);
  overflow: hidden;
}

button,
input {
  font-family: inherit;
}

/* =========================================================
   App layout
   ========================================================= */

.app {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
}

.main {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 0;
}

/* =========================================================
   Top bar
   ========================================================= */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;

  padding: 12px 16px;
  background: var(--ui-panel);
  border-bottom: 1px solid var(--ui-border);
  box-shadow: var(--shadow-sm);
}

.topbar__left,
.topbar__center,
.topbar__right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* =========================================================
   Branding
   ========================================================= */

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--ui-primary), #60a5fa);
}

.brand__title {
  font-weight: 700;
  font-size: 15px;
}

.brand__sub {
  font-size: 12px;
  color: var(--ui-text-muted);
}

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--control-bg);
  color: var(--control-text);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

.btn--ghost {
  border-color: var(--control-border);
  background: var(--control-bg);
}

.btn--ghost:hover {
  background: var(--control-bg-hover);
  border-color: var(--control-border-strong);
}

.btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

/* =========================================================
   Theme toggle button (Sun/Moon)
   Works even if your HTML only uses id="themeToggle"
   ========================================================= */

#themeToggle,
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

#themeToggle {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--control-border);
  background: var(--control-bg);
  color: var(--control-text);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
}

#themeToggle:hover {
  background: var(--control-bg-hover);
  border-color: var(--control-border-strong);
}

#themeToggle:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

#themeToggle svg {
  display: block;
}

.theme-toggle__icon {
  display: inline-flex;
  line-height: 0;
}

/* =========================================================
   Sidebar
   ========================================================= */

.side {
  padding: 16px;
  background: var(--ui-panel-muted);
  border-right: 1px solid var(--ui-border);
  overflow-y: auto;
}

/* =========================================================
   Cards
   ========================================================= */

.card {
  background: var(--ui-panel);
  border: 1px solid var(--ui-border);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 14px;
}

.card--muted {
  background: var(--ui-panel-muted);
}

.card__title {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 10px;
}

/* =========================================================
   Text helpers
   ========================================================= */

.muted {
  color: var(--ui-text-muted);
  font-size: 13px;
  line-height: 1.4;
}

/* =========================================================
   Boundary Manager (compacted rows)
   ========================================================= */

.bm {
  display: grid;
  gap: 8px;
}

.bm__row {
  display: grid;
  grid-template-columns: 26px 26px 26px 26px minmax(0, 1fr);
  column-gap: 8px;
  row-gap: 6px;
  align-items: center;
  min-width: 0;
}

.bm__row--hole {
  padding-left: 12px;
}

.bm__target {
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--control-border);
  background: var(--control-bg);
  color: var(--control-text);
  font-size: 12px;
  cursor: pointer;
  text-align: left;

  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.bm__target:hover {
  background: var(--control-bg-hover);
  border-color: var(--control-border-strong);
}

.bm__target:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.bm__target.is-active {
  background: rgba(37, 99, 235, 0.10);
  border-color: rgba(37, 99, 235, 0.55);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

body[data-theme="dark"] .bm__target.is-active {
  background: rgba(96, 165, 250, 0.12);
  border-color: rgba(96, 165, 250, 0.65);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.bm__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 26px;
  height: 26px;

  border-radius: 8px;
  border: 1px solid var(--control-border);
  background: var(--control-bg);

  cursor: pointer;
  padding: 0;
  line-height: 1;
  color: var(--control-muted);
}

.bm__icon svg {
  display: block;
}

.bm__icon:hover {
  background: var(--control-bg-hover);
  border-color: var(--control-border-strong);
  color: var(--control-text);
}

.bm__icon:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.bm__icon--trash {
  color: var(--ui-danger);
}


.bm__icon--eye.is-on,
.bm__icon--angle.is-on,
.bm__icon--ruler.is-on {
  color: var(--ui-primary);
}

.bm__icon--eye.is-off,
.bm__icon--angle.is-off,
.bm__icon--ruler.is-off {
  color: var(--ui-text-subtle);
}

.bm__actions {
  margin-top: 10px;
}

/* =========================================================
   Lists / Shortcuts / Status
   ========================================================= */

.list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  font-size: 13px;
}

.kbd {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 6px;

  background: var(--kbd-bg);
  border: 1px solid var(--kbd-border);
  color: var(--control-text);

  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2px;

  box-shadow:
    inset 0 -1px 0 rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

body[data-theme="dark"] .kbd {
  box-shadow:
    inset 0 -1px 0 rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.status__line--error {
  color: var(--ui-danger);
  font-weight: 700;
}

/* =========================================================
   Canvas / Stage
   ========================================================= */

.stage {
  position: relative;
  background: var(--canvas-bg);
  overflow: hidden;
}

.stage__view {
  position: absolute;
  inset: 0;
}