:root {
  --ink: #1a2332;
  --ink-muted: #4a5568;
  --paper: #f7f5f0;
  --paper-deep: #ebe6db;
  --accent: #0d4f6b;
  --accent-hover: #0a3d54;
  --header-bg: #0d4f6b;
  --header-text: #f7f5f0;
  --row-alt: #eef2f5;
  --border: #c5cdd6;
  --danger: #9b2c2c;
  --danger-bg: #fde8e8;
  --ok: #276749;
  --ok-bg: #e6fffa;
  --shadow: 0 8px 28px rgba(26, 35, 50, 0.12);
  --font-sans: "Source Sans 3", system-ui, sans-serif;
  --font-serif: "Source Serif 4", Georgia, serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(13, 79, 107, 0.08), transparent),
    linear-gradient(180deg, #dfe6ec 0%, var(--paper) 40%, var(--paper-deep) 100%);
  line-height: 1.45;
}

/* —— Top bar —— */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge--guest {
  background: var(--paper-deep);
  color: var(--ink-muted);
  border: 1px solid var(--border);
}

.badge--auth {
  background: var(--ok-bg);
  color: var(--ok);
  border: 1px solid #9ae6b4;
}

.btn {
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--ink);
}

.btn--ghost:hover:not(:disabled) {
  background: var(--paper-deep);
}

.btn--danger {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: #feb2b2;
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
}

.btn--danger:hover:not(:disabled) {
  background: #fed7d7;
}

.btn--add {
  background: transparent;
  border: 1px dashed var(--accent);
  color: var(--accent);
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.4rem;
}

.btn--add:hover:not(:disabled) {
  background: rgba(13, 79, 107, 0.06);
}

/* —— Documento —— */
.documento {
  max-width: 980px;
  margin: 1.5rem auto 3rem;
  padding: 2rem 1.75rem 2.5rem;
  background: #fff;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.encabezado {
  text-align: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 3px double var(--accent);
}

.encabezado__institucion {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.encabezado__subtitulo {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-muted);
  letter-spacing: 0.06em;
}

.encabezado__lema {
  margin: 0.75rem auto 0;
  max-width: 36em;
  font-style: italic;
  font-size: 0.92rem;
  color: var(--ink-muted);
}

.encabezado__titulo {
  margin: 1.1rem 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.03em;
}

.anio-editable {
  display: inline-block;
  min-width: 2.6em;
  padding: 0 0.15em;
  border-radius: 3px;
  outline: none;
  font: inherit;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.anio-editable.is-editable {
  cursor: text;
  border-bottom: 2px dashed rgba(13, 79, 107, 0.35);
}

.anio-editable.is-editable:hover {
  background: rgba(13, 79, 107, 0.06);
}

.anio-editable.is-editable:focus {
  background: #fff;
  box-shadow: inset 0 0 0 2px var(--accent);
  border-bottom-color: transparent;
}

.aviso {
  margin: 0 0 1.25rem;
  padding: 0.65rem 0.9rem;
  background: var(--paper);
  border-left: 3px solid var(--accent);
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.aviso[hidden],
[hidden] {
  display: none !important;
}

body.is-editing .aviso {
  display: none !important;
}

/* —— Meses / tablas —— */
.mes {
  margin-bottom: 1.75rem;
}

.mes__titulo {
  margin: 0;
  padding: 0.55rem 0.85rem;
  background: var(--header-bg);
  color: var(--header-text);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: center;
}

.tabla-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-top: none;
}

table.crono-tabla {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.crono-tabla th {
  background: var(--paper-deep);
  color: var(--ink);
  font-weight: 700;
  text-align: left;
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.crono-tabla td {
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.crono-tabla tbody tr:nth-child(even) {
  background: var(--row-alt);
}

.crono-tabla tbody tr:hover {
  background: #e3edf3;
}

.crono-tabla .col-fecha {
  width: 18%;
  font-weight: 600;
  color: var(--accent);
}

.crono-tabla .col-actividad {
  width: 36%;
}

.crono-tabla .col-responsable {
  width: 20%;
}

.crono-tabla .col-observacion {
  width: 20%;
}

.crono-tabla .col-acciones {
  width: 3rem;
  text-align: center;
}

.crono-tabla .col-drag {
  width: 2.25rem;
  text-align: center;
  padding-left: 0.25rem;
  padding-right: 0.25rem;
}

body:not(.is-editing) .col-acciones,
body:not(.is-editing) .col-drag {
  display: none;
}

/* Arrastre */
.drag-handle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.6rem;
  height: 1.6rem;
  font-size: 0.85rem;
  letter-spacing: -0.12em;
  color: var(--ink-muted);
  cursor: grab;
  user-select: none;
  border-radius: 3px;
  line-height: 1;
}

.drag-handle:hover {
  background: rgba(13, 79, 107, 0.1);
  color: var(--accent);
}

.drag-handle:active {
  cursor: grabbing;
}

.fila-actividad.is-dragging {
  opacity: 0.4;
}

.fila-actividad.drop-before td {
  box-shadow: inset 0 3px 0 0 var(--accent);
}

.fila-actividad.drop-after td {
  box-shadow: inset 0 -3px 0 0 var(--accent);
}

.fila-drop-vacia td {
  text-align: center;
  color: var(--ink-muted);
  font-style: italic;
  padding: 1rem;
  border: 2px dashed transparent;
}

.fila-drop-vacia.drop-target td {
  border-color: var(--accent);
  background: rgba(13, 79, 107, 0.06);
  color: var(--accent);
}

/* Celdas editables */
.celda {
  min-height: 1.4em;
  padding: 0.2rem 0.3rem;
  border-radius: 2px;
  outline: none;
  word-break: break-word;
}

body.is-editing .celda {
  cursor: text;
}

body.is-editing .celda:hover {
  background: rgba(13, 79, 107, 0.06);
}

body.is-editing .celda:focus {
  background: #fff;
  box-shadow: inset 0 0 0 2px var(--accent);
}

body:not(.is-editing) .celda {
  pointer-events: none;
}

.celda:empty::before {
  content: "—";
  color: #a0aec0;
}

body.is-editing .celda:empty::before {
  content: attr(data-placeholder);
  color: #a0aec0;
}

/* —— Modal —— */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 35, 50, 0.45);
}

.modal__panel {
  position: relative;
  width: min(100%, 380px);
  padding: 1.5rem;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.modal__panel h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-serif);
  font-size: 1.25rem;
}

.modal__hint {
  margin: 0 0 1.25rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.9rem;
  font-size: 0.88rem;
  font-weight: 600;
}

.field input {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 400;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  background: var(--paper);
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 79, 107, 0.15);
}

.form-error {
  margin: 0 0 0.75rem;
  padding: 0.45rem 0.6rem;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 0.85rem;
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* —— Toast —— */
.toast {
  position: fixed;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 120;
  padding: 0.65rem 1.1rem;
  background: var(--ink);
  color: #fff;
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  animation: toast-in 0.25s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@media (max-width: 640px) {
  .documento {
    margin: 0.75rem;
    padding: 1.25rem 0.85rem 1.75rem;
  }

  .crono-tabla {
    font-size: 0.8rem;
  }

  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar__actions {
    justify-content: flex-end;
  }
}

@media print {
  .topbar,
  .aviso,
  .btn--add,
  .col-acciones,
  .col-drag,
  .modal,
  .toast {
    display: none !important;
  }

  body {
    background: #fff;
  }

  .documento {
    box-shadow: none;
    border: none;
    margin: 0;
    max-width: none;
  }
}