:root {
  /* Paleta dnota (sin tocar) */
  --dnota-green:   rgb(105, 190, 40);
  --dnota-magenta: rgb(226, 23, 118);
  --dnota-gray:    rgb(116, 116, 119);
  --dnota-white:   rgb(255, 255, 255);

  /* --- Derivados del gris dnota, manteniendo su matiz azulado --- */
  --gray-50:  rgb(250, 250, 251);
  --gray-100: rgb(244, 244, 246);
  --gray-150: rgb(238, 238, 241);
  --gray-200: rgb(226, 226, 230);
  --gray-300: rgb(210, 210, 214);
  --gray-400: rgb(160, 160, 164);
  --gray-500: rgb(134, 134, 138);
  --gray-600: var(--dnota-gray);
  --gray-700: rgb(94, 94, 98);
  --gray-800: rgb(52, 52, 56);
  --gray-900: rgb(32, 32, 35);

  /* Verde dnota */
  --green-700: rgb(74, 133, 28);
  --green-600: rgb(90, 160, 34);
  --green-soft: rgba(105, 190, 40, .18);

  /* Magenta dnota */
  --magenta-700: rgb(158, 16, 82);
  --magenta-soft: rgba(226, 23, 118, .12);
  --magenta-line: rgba(226, 23, 118, .50);

  /* Roles */
  --bg:          var(--gray-600);
  --surface:     var(--gray-100);
  --surface-alt: var(--gray-200);
  --field:       var(--dnota-white);
  --border:      var(--gray-300);
  --text:        var(--gray-900);
  --text-muted:  var(--gray-700);
  --text-on-gray: var(--dnota-white);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--bg);
  color: var(--text-on-gray);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 24px;
}

/* --- Tarjetas y estructura --- */
.card {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-top: 4px solid var(--dnota-magenta);
  border-radius: 16px;
  padding: 24px;
  width: 100%;
  max-width: 480px;
  align-self: flex-start;
  box-shadow: 0 2px 8px rgba(32, 32, 35, .18);
}
.card.wide { max-width: 820px; }
.center { text-align: center; }

h1, h2 { color: var(--text); }
h1 {
  margin-top: 0;
  padding-left: 12px;
  border-left: 5px solid var(--dnota-green);
}
h2 { margin-top: 28px; }

a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Formularios --- */
input, button, select, textarea {
  font: inherit;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--field);
  color: var(--text);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--dnota-green);
  outline-offset: 1px;
  border-color: transparent;
}

button {
  background: var(--dnota-gray);
  border-color: var(--dnota-gray);
  color: var(--dnota-white);
  cursor: pointer;
  font-weight: 600;
}
button:hover { background: var(--gray-700); }
button:disabled { opacity: .55; cursor: not-allowed; }

button.danger {
  background: var(--magenta-soft);
  border-color: var(--magenta-line);
  color: var(--dnota-magenta);
}
button.danger:hover { background: rgba(226, 23, 118, .22); }

button.primary {
  background: var(--green-600);
  border-color: var(--green-600);
  color: var(--dnota-white);
}
button.primary:hover { background: var(--dnota-green); }

.pin { font-size: 2rem; width: 8ch; text-align: center; letter-spacing: .3em; }
.small { width: 6ch; }

/* --- Texto de estado --- */
.error { color: var(--dnota-magenta); }
.muted { color: var(--text-muted); }
.big   { font-size: 1.4rem; }
.ok    { color: var(--green-700); }

/* --- Marcador --- */
.board { list-style: none; padding: 0; margin: 0; counter-reset: pos; }
.board li {
  counter-increment: pos;
  display: flex;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 6px;
  background: var(--gray-150);
  border: 1px solid transparent;
  color: var(--text);
}
.board li:nth-child(even) { background: var(--field); }
.board li::before { content: counter(pos) "."; width: 2.2em; color: var(--text-muted); }
.board li span { flex: 1; }
.board li b { color: var(--green-700); }
.board li.me {
  background: var(--dnota-green);
  border-color: var(--green-700);
  color: var(--dnota-white);
}
.board li.me b,
.board li.me::before { color: var(--dnota-white); }

/* --- Tablas del admin --- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--border); }
th {
  background: var(--dnota-gray);
  color: var(--dnota-white);
  font-weight: 600;
}
th:first-child { border-top-left-radius: 8px; }
th:last-child  { border-top-right-radius: 8px; }

/* --- Proyector --- */
.projector { align-items: flex-start; }
.projector main.card {
  max-width: 1000px;
  padding: 32px 40px;
  border-top-width: 6px;
}
.projector main.card::before {
  content: "";
  display: block;
  height: 8px;
  border-radius: 4px;
  margin: -16px -8px 22px;
  background: linear-gradient(90deg, var(--dnota-magenta), var(--dnota-green));
}
.projector h1 {
  font-size: 3rem;
  text-align: center;
  border-left: none;
  padding-left: 0;
  margin-bottom: 24px;
}
.projector .board li {
  font-size: 1.8rem;
  padding: 12px 18px;
  background: var(--field);
  border: 1px solid var(--border);
}
.projector .board li:nth-child(even) { background: var(--gray-150); }
.projector .board li.me {
  background: var(--dnota-green);
  color: var(--dnota-white);
  border-color: var(--green-700);
}
.projector .quiz h2 { font-size: 2rem; padding: 10px 16px; }
.projector .opt    { font-size: 1.4rem; }
.projector .timer  { font-size: 2.6rem; }
.projector pre {
  background: var(--gray-150);
  color: var(--gray-900);
  border-left: 4px solid var(--dnota-magenta);
  font-size: 1.15rem;
}
.projector p { color: var(--text); }
.projector .muted { color: var(--text-muted); }
.projector #rsub,
.projector #msub,
.projector #dsub,
.projector #fsub,
.projector #osub {
  color: var(--green-700);
  font-weight: 700;
  font-size: 1.2rem;
}
.projector .logo-slot img {
  max-height: 96px;
  padding: 4px 10px;
  background: var(--dnota-white);
  border-radius: 10px;
  box-shadow: 0 0 0 1px var(--border);
}
.projector .logo-slot .logo-placeholder { width: 96px; height: 96px; font-size: 1rem; }

/* --- Navegación y layout --- */
.nav { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.stack { display: flex; flex-direction: column; gap: 8px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 12px 0; }

textarea { width: 100%; min-height: 110px; font-family: ui-monospace, monospace; }

/* --- Quiz --- */
.quiz { margin: 16px 0; }
.quiz h2 {
  background: var(--dnota-magenta);
  color: var(--dnota-white);
  padding: 8px 14px;
  border-radius: 8px;
  border-left: none;
  margin-top: 0;
}
.timer {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin: 4px 0 12px;
  color: var(--green-700);
}
.opt {
  display: block;
  width: 100%;
  text-align: left;
  margin-bottom: 8px;
  padding: 14px;
  font-size: 1.1rem;
  background: var(--field);
  border: 2px solid var(--gray-300);
  border-radius: 10px;
  color: var(--text);
}
.opt.chosen  { border-color: var(--dnota-green); }
.opt.right   { border-color: var(--dnota-green); background: var(--green-soft); }
.opt.wrong   { border-color: var(--dnota-magenta); background: var(--magenta-soft); }
.opt:disabled { opacity: 1; cursor: default; }

/* --- Relacionar elementos --- */
.match-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* --- Retos SQL y depuración --- */
.tbl { overflow-x: auto; margin-bottom: 12px; }
.tbl table { font-size: .85rem; }
pre {
  white-space: pre-wrap;
  background: var(--gray-150);
  color: var(--text);
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--dnota-magenta);
}
.challenge { border-top: 1px solid var(--border); padding-top: 12px; margin-top: 16px; }

/* --- Ordena los pasos --- */
.order-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  margin-bottom: 6px;
  background: var(--field);
  border: 2px solid var(--gray-300);
  border-radius: 8px;
  cursor: grab;
  user-select: none;
}
.order-item:active { cursor: grabbing; }
.order-item:hover { border-color: var(--dnota-green); }
.order-pos {
  flex: 0 0 2em;
  text-align: center;
  font-weight: 700;
  color: var(--green-700);
}
.order-text { flex: 1; font-family: ui-monospace, monospace; }
.projector .order-item { font-size: 1.4rem; }

/* --- Logo --- */
.logo-slot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 0 0 16px;
}
.logo-slot img {
  display: block;
  max-height: 48px;
  width: auto;
}
.logo-slot .logo-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 2px dashed var(--magenta-line);
  color: var(--dnota-magenta);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  text-align: center;
  line-height: 1.1;
}

/* Enlaces con aspecto de botón (accesos directos del admin) */
a.button {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--dnota-gray);
  color: var(--dnota-white);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--dnota-gray);
}
a.button:hover { background: var(--gray-700); text-decoration: none; }