/* EXPLAIN Render - estilos da aplicacao */

:root {
  color-scheme: light;
  --bg: #f4f6f9;
  --bg-panel: #ffffff;
  --bg-elevated: #ffffff;
  --bg-input: #fbfcfd;
  --bg-canvas: #eceff4;
  --border: #dde3ea;
  --border-strong: #c6cfda;
  --text: #1b2430;
  --text-dim: #5a6675;
  --text-faint: #8b96a5;
  --accent: #2f6fb0;
  --accent-hover: #275f97;
  --accent-soft: #e8f0f9;
  --danger: #c0392b;
  --danger-soft: #fdecea;
  --ok: #1e7f4f;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 8px 24px rgba(16, 24, 40, .06);
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #12161c;
  --bg-panel: #171c24;
  --bg-elevated: #1c222c;
  --bg-input: #10141a;
  --bg-canvas: #0d1116;
  --border: #262e3a;
  --border-strong: #35404f;
  --text: #e6ebf2;
  --text-dim: #a4b0c0;
  --text-faint: #7c8899;
  --accent: #58a0e6;
  --accent-hover: #74b1ee;
  --accent-soft: #1b2a3b;
  --danger: #ff8b7d;
  --danger-soft: #33201d;
  --ok: #6cd39a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #12161c;
    --bg-panel: #171c24;
    --bg-elevated: #1c222c;
    --bg-input: #10141a;
    --bg-canvas: #0d1116;
    --border: #262e3a;
    --border-strong: #35404f;
    --text: #e6ebf2;
    --text-dim: #a4b0c0;
    --text-faint: #7c8899;
    --accent: #58a0e6;
    --accent-hover: #74b1ee;
    --accent-soft: #1b2a3b;
    --danger: #ff8b7d;
    --danger-soft: #33201d;
    --ok: #6cd39a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.45;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ---------------- topbar ---------------- */

.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo { width: 30px; height: 30px; color: var(--accent); flex: 0 0 auto; }
.brand-text { min-width: 0; }
.brand-text h1 {
  margin: 0;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.brand-text p {
  margin: 0;
  font-size: 12px;
  color: var(--text-faint);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-dim);
  cursor: pointer;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }

/* ---------------- layout ---------------- */

.layout {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  min-height: 0;
}

.panel {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 4px 0 24px;
}

.panel-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.panel-section:last-child { border-bottom: 0; }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 8px;
}
.section-head h2 {
  margin: 0;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.link-btn {
  border: 0;
  background: none;
  color: var(--accent);
  font-size: 12px;
  cursor: pointer;
  padding: 0;
}
.link-btn:hover { text-decoration: underline; }

textarea#json-input {
  width: 100%;
  height: 260px;
  resize: vertical;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  tab-size: 2;
}
textarea#json-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.btn-row { display: flex; gap: 8px; margin-top: 10px; }

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background .12s ease, border-color .12s ease, color .12s ease;
}
.btn:hover:not(:disabled) { border-color: var(--border-strong); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 550;
}
.btn.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn.icon { padding: 6px 10px; font-size: 15px; line-height: 1; min-width: 32px; }

.status {
  margin: 10px 0 0;
  font-size: 12px;
  color: var(--text-dim);
  min-height: 16px;
  word-break: break-word;
}
.status.error {
  color: var(--danger);
  background: var(--danger-soft);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 11.5px;
}
.status.ok { color: var(--ok); }

.samples { display: grid; gap: 4px; }
.chip-group {
  margin: 6px 0 2px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.chip-group:first-child { margin-top: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  padding: 3px 0;
  cursor: pointer;
}
.check input { accent-color: var(--accent); }

.legend { list-style: none; margin: 0; padding: 0; display: grid; gap: 5px; }
.legend li { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-dim); }
.legend .swatch {
  width: 14px; height: 14px; border-radius: 3px; flex: 0 0 auto;
  border: 1px solid rgba(0, 0, 0, .15);
}
.legend .key { font-family: var(--mono); font-size: 11px; color: var(--text-faint); }

.help ol { margin: 0; padding-left: 18px; color: var(--text-dim); font-size: 12.5px; }
.help li { margin-bottom: 4px; }
.help code {
  font-family: var(--mono);
  font-size: 11.5px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 4px;
}
.fineprint { color: var(--text-faint); font-size: 11.5px; margin: 10px 0 0; }

/* ---------------- viewer ---------------- */

.viewer {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.toolbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.tool-group { display: flex; align-items: center; gap: 6px; }
.zoom-label {
  font-size: 12px;
  font-family: var(--mono);
  color: var(--text-dim);
  min-width: 46px;
  text-align: center;
}

.canvas-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  background-color: var(--bg-canvas);
  background-image: radial-gradient(circle at 1px 1px, var(--border) 1px, transparent 0);
  background-size: 22px 22px;
  cursor: grab;
}
.canvas-wrap.panning { cursor: grabbing; }

#diagram { display: block; width: 100%; height: 100%; }
#diagram #content { filter: drop-shadow(0 6px 20px rgba(16, 24, 40, .18)); }

.hit-rect {
  fill: none;
  pointer-events: all;
  stroke: transparent;
  stroke-width: 2;
}
.hit-rect:hover { stroke: var(--accent); }

.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--text-faint);
  pointer-events: none;
  text-align: center;
  padding: 24px;
}
.empty-state p { margin: 0; font-size: 13px; max-width: 320px; }
.empty-state[hidden] { display: none; }

.tooltip {
  position: fixed;
  z-index: 40;
  max-width: 420px;
  max-height: 60vh;
  overflow: auto;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.45;
  pointer-events: none;
}
.tooltip[hidden] { display: none; }
.tooltip .t-head {
  font-weight: 650;
  margin: 8px 0 3px;
  color: var(--text);
}
.tooltip .t-head:first-child { margin-top: 0; }
.tooltip .t-body {
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  margin: 0 0 4px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg-panel);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12.5px;
  box-shadow: var(--shadow);
  z-index: 60;
  opacity: 0;
  transition: opacity .18s ease;
  pointer-events: none;
}
.toast.show { opacity: 1; }

/* ---------------- responsivo ---------------- */

@media (max-width: 940px) {
  body { overflow: auto; }
  .layout { grid-template-columns: 1fr; }
  .panel { border-right: 0; border-bottom: 1px solid var(--border); }
  .viewer { height: 70vh; }
}