/* ======= Design tokens ======= */
:root {
  /* Colors */
  --bg-base: #ffffff;
  --bg-a: #fdda64;
  --bg-b: #cad2e9;
  --text: #3f2b56;
  --card: #ffffffee;
  --line: #e3e6ef;
  --btn: #fdda64;
  --btn-text: #3f2b56;
  --btn-hover: #cad2e9;

  /* Radius */
  --radius: 14px;

  /* Typography */
  --font-base: system-ui, -apple-system, Segoe UI, Roboto, Arial;

  /* Sizes */
  --text-xs: 12px;
  --text-sm: 14px;
  --text-md: 14px; /* Base body + buttons */
  --text-lg: 16px; /* Subtitles, section titles, viewer title */
  --text-xl: 24px; /* Acronym C·O·N·E·C·T·A */

  /* Weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-bold: 700;
  --weight-black: 800;
}

/* ======= Base layout & body ======= */
html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-base);
  font-size: var(--text-md);
  font-weight: var(--weight-regular);
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-base);
  background-image: linear-gradient(180deg, var(--bg-a) 0%, var(--bg-b) 100%);
  background-attachment: fixed;
}

/* ======= Layout container ======= */
.wrap {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px;
}

/* Main boxes */
.header,
.side,
.main {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}

/* Footer (no card box) */
.footer {
  text-align: center;
  margin-top: 16px;
  color: #5b4a6e;
  padding: 8px 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.footer a {
  color: inherit;
  text-decoration: underline;
}

/* ======= Main grid ======= */
.layout {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
}

/* Columns */
.side {
  flex: 1 1 260px;
  min-width: 220px;
  overflow: auto;
}

.main {
  flex: 3 1 600px;
  display: flex;
  flex-direction: column;
}

/* ======= Buttons (shared: header, sidebar, viewer) ======= */
.open {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  background: var(--btn);
  color: var(--btn-text);
  border: 0;
  border-radius: 10px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: var(--text-md); /* 14px */
  font-weight: var(--weight-medium); /* 500 */
  line-height: 1;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.open:hover {
  background: var(--btn-hover);
}

.open.active {
  outline: 2px solid color-mix(in srgb, var(--btn) 45%, transparent);
}

/* Ensure consistency for <a> styled as .open */
a.open,
a.open:link,
a.open:visited,
a.open:hover,
a.open:active,
a.open:focus {
  font-family: inherit;
  font-size: var(--text-md); /* 14px */
  font-weight: var(--weight-medium);
  color: var(--btn-text);
  text-decoration: none;
}

/* Disabled "Editar Formulario" */
a.open[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.6;
}

/* ======= Sidebar ======= */
.group {
  margin-bottom: 16px;
}

.group h3 {
  margin: 8px 8px 6px;
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: 0.2px;
  opacity: 0.9;
  border-left: 4px solid var(--btn);
  padding-left: 8px;
  padding-right: 28px;
  cursor: pointer;
  user-select: none;
  position: relative;
}

.group h3::after {
  content: '▾';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.2s ease;
  font-size: 0.8em;
  opacity: 0.6;
}

.group.collapsed h3::after {
  transform: translateY(-50%) rotate(-90deg);
}

.group.collapsed > .group-content {
  display: none;
}

/* Sub-groups */
.subgroup {
  margin-bottom: 4px;
}

.subgroup-title {
  cursor: pointer;
  user-select: none;
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  margin: 8px 4px 6px;
  padding: 6px 28px 6px 12px;
  border-left: 3px solid var(--btn-hover);
  position: relative;
  opacity: 0.8;
}

.subgroup-title::after {
  content: '▾';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.2s ease;
  font-size: 0.75em;
  opacity: 0.6;
}

.subgroup.collapsed > .subgroup-title::after {
  transform: translateY(-50%) rotate(-90deg);
}

.subgroup.collapsed > .list {
  display: none;
}

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item-btn {
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  color: var(--text);
  font-size: var(--text-sm); /* 14px */
  font-weight: var(--weight-regular);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.item-btn:hover {
  border-color: #d1d6ea;
  background: #fafbff;
}

.item-btn.active {
  outline: 2px solid color-mix(in srgb, var(--btn) 50%, transparent);
}

/* ======= Viewer ======= */
.viewer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.viewer-title {
  margin: 0;
  font-size: var(--text-lg); /* 18px */
  font-weight: var(--weight-bold); /* 700 */
}

.viewer-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

iframe {
  flex: 1;
  width: 100%;
  border: 0;
  border-bottom-left-radius: var(--radius);
  border-bottom-right-radius: var(--radius);  
}

/* ======= Header ======= */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header .brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header .brand img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  border-radius: 8px;
}

.header .title {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}

/* Acronym: C · O · N · E · C · T · A */
.header .acronym {
  font-size: var(--text-xl); /* 24px */
  font-weight: var(--weight-black); /* 800 */
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 0.25em;
  text-transform: uppercase;
}

.header .acronym .l {
  display: inline-block;
}

.header .acronym .dot {
  opacity: 0.55;
}

/* Colored letters */
.header .acronym span:nth-child(1) {
  color: #fdda64;
}
.header .acronym span:nth-child(3) {
  color: #a2ddd2;
}
.header .acronym span:nth-child(5) {
  color: #cad2e9;
}
.header .acronym span:nth-child(7) {
  color: #ff8e6f;
}
.header .acronym span:nth-child(9) {
  color: #3f2b56;
}
.header .acronym span:nth-child(11) {
  color: #fdda64;
}
.header .acronym span:nth-child(13) {
  color: #a2ddd2;
}

/* Subtitle: centro de observación... */
.header .expansion {
  font-size: var(--text-lg); /* 18px */
  font-weight: var(--weight-bold); /* 700 */
  opacity: 0.95;
  margin-top: 2px;
  letter-spacing: 0.02em;
}

.header .top-buttons {
  display: flex;
  gap: 8px;
}