/*!
 * millenium-bug.css — Retro banking vibes for your website
 * Classless-first: gli elementi HTML semantici sono stilati direttamente,
 * le classi .mb-* sono solo modificatori.
 * https://github.com/matteocosta/millenium-bug
 */

/* ==========================================================================
   1. TOKENS
   ========================================================================== */

:root {
  /* Palette gestionale web anni '90 (IE su Windows) */
  --mb-window: #f5f4f1;          /* interno finestra: quasi bianco */
  --mb-face: #d8d4cf;            /* grigio dei campi e dei bottoni */
  --mb-face-light: #eceae6;
  --mb-white: #ffffff;
  --mb-shadow: #8a8880;
  --mb-shadow-dark: #b3b0aa;
  --mb-text: #000000;
  --mb-desktop: #7d92a1;         /* sfondo dietro la finestra */

  /* Campi */
  --mb-field-bg: #ffffff;
  --mb-field-text: #000000;

  /* Tab */
  --mb-tab: #1058a8;
  --mb-tab-text: #ffffff;
  --mb-tab-active: #e8501e;

  /* Stati */
  --mb-mark: #ffff00;            /* warning / evidenza */
  --mb-ok: #39e639;              /* ok / attivo */
  --mb-due: #b8e2e2;             /* scadenze */
  --mb-alert: #e60000;           /* alert testuali */
  --mb-primary: #8ed8d8;         /* bottone primario ciano */
  --mb-link: #000080;

  /* Font */
  --mb-font: "Tahoma", "MS Sans Serif", "Segoe UI", Verdana, sans-serif;
  --mb-font-size: 11px;
  --mb-font-mono: "Courier New", Courier, monospace;
  --mb-font-mono-size: 13px;

  /* Bevel (bordi 3D sottili, da pagina web IE — non da app desktop) */
  --mb-bevel-raised-border: var(--mb-white) var(--mb-shadow) var(--mb-shadow) var(--mb-white);
  --mb-bevel-raised-inner: inset 1px 1px 0 var(--mb-face-light), inset -1px -1px 0 var(--mb-shadow-dark);
  --mb-bevel-sunken-border: var(--mb-shadow) var(--mb-white) var(--mb-white) var(--mb-shadow);
  --mb-bevel-sunken-inner: inset 1px 1px 0 var(--mb-shadow-dark);
}

/* ==========================================================================
   2. BASE
   ========================================================================== */

html {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--mb-desktop);
  color: var(--mb-text);
  font-family: var(--mb-font);
  font-size: var(--mb-font-size);
  line-height: 1.35;
  -webkit-font-smoothing: none;
  scrollbar-color: var(--mb-face) var(--mb-face-light);
  scrollbar-width: auto;
}

::selection {
  background: var(--mb-link);
  color: var(--mb-white);
}

/* Scrollbar squadrate stile Windows classico */
::-webkit-scrollbar {
  width: 16px;
  height: 16px;
}

::-webkit-scrollbar-track {
  background: repeating-conic-gradient(var(--mb-face-light) 0% 25%, var(--mb-white) 0% 50%) 0 0 / 2px 2px;
}

::-webkit-scrollbar-thumb,
::-webkit-scrollbar-button {
  background: var(--mb-face);
  border: 1px solid;
  border-color: var(--mb-bevel-raised-border);
  box-shadow: var(--mb-bevel-raised-inner);
}

a {
  color: var(--mb-link);
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 1px dotted var(--mb-text);
  outline-offset: -3px;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-size: var(--mb-font-size);
  font-weight: bold;
}

hr {
  border: 0;
  border-top: 1px solid var(--mb-shadow);
  border-bottom: 1px solid var(--mb-white);
  margin: 8px 0;
}

p {
  margin: 0 0 6px;
}

/* Valori "macchina": sempre monospace */
code, kbd, samp, time, data, output {
  font-family: var(--mb-font-mono);
  font-size: var(--mb-font-mono-size);
  font-weight: bold;
}

/* Blocchi di codice: pannello incassato bianco */
pre {
  margin: 4px 0 8px;
  padding: 6px 8px;
  background: var(--mb-field-bg);
  border: 1px solid;
  border-color: var(--mb-bevel-sunken-border);
  box-shadow: var(--mb-bevel-sunken-inner);
  overflow-x: auto;
  font-family: var(--mb-font-mono);
  font-size: 12px;
  line-height: 1.4;
}

pre code {
  font-size: inherit;
  font-weight: normal;
}

/* Esempio incorniciato con didascalia */
figure {
  margin: 4px 0 8px;
  padding: 8px;
  background: var(--mb-window);
  border: 1px dotted var(--mb-shadow);
}

figcaption {
  margin-bottom: 6px;
  font-weight: bold;
}

/* ==========================================================================
   3. FINESTRA — <dialog> oppure .mb-window
   ========================================================================== */

dialog,
.mb-window {
  display: block;
  position: static;
  width: min(1100px, calc(100vw - 32px));
  margin: 16px auto;
  padding: 2px;
  background: var(--mb-window);
  color: var(--mb-text);
  border: 1px solid var(--mb-shadow);
  box-shadow: 2px 2px 0 rgb(0 0 0 / 25%);
}

dialog:not([open]) {
  display: none;
}

/* Title bar */
dialog > header,
.mb-window > header {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 4px;
  margin-bottom: 4px;
  background: var(--mb-white);
  border-bottom: 1px solid var(--mb-shadow-dark);
}

dialog > header :is(h1, h2, h3),
.mb-window > header :is(h1, h2, h3) {
  flex: 1;
  margin: 0;
  font-size: var(--mb-font-size);
  font-weight: normal;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

dialog > header button,
.mb-window > header button {
  min-width: 18px;
  height: 16px;
  padding: 0 3px;
  font-size: 10px;
  line-height: 1;
}

/* Corpo della finestra */
dialog > form,
dialog > main,
.mb-window > form,
.mb-window > main {
  padding: 4px 6px;
}

/* Finestra modale: aperta via showModal(). Centrata, larga quanto il contenuto. */
dialog:modal {
  position: fixed;
  inset: 0;
  width: auto;
  max-width: min(680px, calc(100vw - 32px));
  margin: auto;
}

/* Sfondo dietro la modale: il "desktop" grigio-azzurro tramato */
dialog::backdrop {
  background:
    repeating-linear-gradient(45deg, rgb(0 0 0 / 8%) 0 1px, transparent 1px 3px),
    var(--mb-desktop);
}

/* ==========================================================================
   4. TAB — <nav> con <a> o <button>; stato attivo via aria-*
   ========================================================================== */

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  padding: 2px 0;
}

nav :is(a, button) {
  padding: 2px 8px 3px;
  background: var(--mb-tab);
  color: var(--mb-tab-text);
  font-family: var(--mb-font);
  font-size: var(--mb-font-size);
  font-weight: bold;
  text-decoration: underline;
  border: 0;
  box-shadow: none;
  min-height: 0;
  cursor: pointer;
}

nav :is(a, button):is([aria-current], [aria-selected="true"]) {
  background: var(--mb-tab-active);
}

/* Pannello contenuto sotto i tab */
nav + section,
.mb-panel {
  margin: 0 0 10px;
  padding: 8px;
  background: var(--mb-window);
  border: 1px solid var(--mb-tab-active);
}

/* ==========================================================================
   5. FORM
   ========================================================================== */

fieldset {
  margin: 0 0 8px;
  padding: 6px 8px;
  border: 1px solid var(--mb-shadow);
}

legend {
  padding: 0 4px;
  font-weight: bold;
}

label {
  font-family: var(--mb-font);
  font-size: var(--mb-font-size);
  white-space: nowrap;
}

/* Riga densa label+campi: <p> dentro form oppure .mb-row */
form p,
.mb-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 6px;
  margin: 0 0 5px;
}

/* Campi di testo */
input,
select,
textarea {
  padding: 1px 3px;
  background: var(--mb-field-bg);
  color: var(--mb-field-text);
  font-family: var(--mb-font-mono);
  font-size: var(--mb-font-mono-size);
  font-weight: bold;
  border: 1px solid;
  border-color: var(--mb-bevel-sunken-border);
  box-shadow: var(--mb-bevel-sunken-inner);
  border-radius: 0;
}

input:focus,
select:focus,
textarea:focus {
  outline: 1px dotted var(--mb-text);
  outline-offset: 0;
}

input[readonly],
textarea[readonly],
input:disabled,
select:disabled,
textarea:disabled {
  background: var(--mb-face);
  color: var(--mb-text);
}

textarea {
  resize: vertical;
}

/* Select con freccia squadrata */
select {
  appearance: none;
  padding-right: 20px;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><rect width="16" height="16" fill="%23d8d4cf"/><path d="M0 0h15v1H1v14H0z" fill="%23ffffff"/><path d="M15 0v16H0v-1h14V0z" fill="%238a8880"/><path d="M4 6h8l-4 5z" fill="%23000000"/></svg>');
  background-repeat: no-repeat;
  background-position: right 1px center;
}

/* Checkbox e radio squadrati */
input[type="checkbox"],
input[type="radio"] {
  appearance: none;
  width: 13px;
  height: 13px;
  margin: 0 3px 0 0;
  padding: 0;
  vertical-align: -2px;
  background: var(--mb-field-bg);
  display: inline-grid;
  place-content: center;
}

input[type="radio"] {
  border-radius: 50%;
}

input[type="checkbox"]:checked::before {
  content: "";
  width: 9px;
  height: 9px;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="9" height="9"><path d="M1 4l2.5 2.5L8 1.5 9 3 3.5 8.5 0 5z" fill="%23000000"/></svg>') no-repeat center;
}

input[type="radio"]:checked::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--mb-text);
}

/* Valore calcolato in sola lettura: mono, senza cornice di campo */

/* ==========================================================================
   6. BOTTONI
   ========================================================================== */

button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  min-height: 23px;
  padding: 2px 12px;
  background: var(--mb-face);
  color: var(--mb-text);
  font-family: var(--mb-font);
  font-size: var(--mb-font-size);
  text-transform: uppercase;
  border: 1px solid;
  border-color: var(--mb-bevel-raised-border);
  box-shadow: var(--mb-bevel-raised-inner);
  border-radius: 0;
  cursor: pointer;
}

button:active,
input[type="button"]:active,
input[type="submit"]:active,
input[type="reset"]:active {
  border-color: var(--mb-bevel-sunken-border);
  box-shadow: var(--mb-bevel-sunken-inner);
  padding: 3px 11px 1px 13px; /* il contenuto "affonda" di 1px come su Win9x */
}

button:disabled,
input[type="button"]:disabled,
input[type="submit"]:disabled,
input[type="reset"]:disabled {
  color: var(--mb-shadow);
  text-shadow: 1px 1px 0 var(--mb-white);
  cursor: default;
}

button.mb-primary {
  background: var(--mb-primary);
}

/* Bottone lookup "…" accanto ai campi */
button.mb-lookup {
  min-height: 0;
  min-width: 18px;
  padding: 0 2px;
  height: 19px;
  font-weight: bold;
  text-transform: none;
}

button.mb-lookup::before {
  content: "…";
}

/* Bottoniera in fondo alla finestra: <menu> */
menu {
  display: flex;
  gap: 8px;
  margin: 6px 0 0;
  padding: 6px 4px 4px;
  border-top: 1px solid var(--mb-shadow);
  box-shadow: 0 1px 0 var(--mb-white) inset;
  list-style: none;
}

menu li {
  display: contents;
}

/* ==========================================================================
   7. SEMANTICA DI STATO
   ========================================================================== */

/* Evidenza gialla (warning) */
mark {
  background: var(--mb-mark);
  color: var(--mb-text);
  padding: 0 2px;
}

/* Verde: ok / attivo */
ins,
mark.mb-ok {
  background: var(--mb-ok);
  color: var(--mb-text);
  text-decoration: none;
  padding: 0 2px;
}

/* Ciano: scadenze */
mark.mb-due {
  background: var(--mb-due);
}

/* Rosso bold: messaggi critici */
em,
.mb-alert {
  color: var(--mb-alert);
  font-style: normal;
  font-weight: bold;
}

/* Rosso monospace: valori critici nei campi */
input.mb-alert,
mark .mb-alert {
  color: var(--mb-alert);
}

del {
  color: var(--mb-shadow);
}

/* Campi evidenziati: <mark> che avvolge un <input> */
mark > input,
mark.mb-ok > input,
mark.mb-due > input {
  background: inherit;
}

input.mb-mark    { background: var(--mb-mark); }
input.mb-ok      { background: var(--mb-ok); }
input.mb-due     { background: var(--mb-due); }

/* ==========================================================================
   8. TABELLE
   ========================================================================== */

table {
  border-collapse: collapse;
  background: var(--mb-field-bg);
  border: 1px solid;
  border-color: var(--mb-bevel-sunken-border);
}

th, td {
  padding: 2px 6px;
  border: 1px solid var(--mb-shadow);
  font-size: var(--mb-font-size);
  text-align: left;
}

th {
  background: var(--mb-face);
  font-weight: bold;
}

td {
  font-family: var(--mb-font-mono);
  font-size: var(--mb-font-mono-size);
}

tbody tr:hover {
  background: var(--mb-link);
  color: var(--mb-white);
}

/* ==========================================================================
   9. EXTRA RETRO
   ========================================================================== */

/* Barra di avanzamento a blocchi */
progress {
  appearance: none;
  width: 200px;
  height: 16px;
  background: var(--mb-field-bg);
  border: 1px solid;
  border-color: var(--mb-bevel-sunken-border);
  box-shadow: var(--mb-bevel-sunken-inner);
}

progress::-webkit-progress-bar {
  background: var(--mb-field-bg);
}

progress::-webkit-progress-value {
  background: repeating-linear-gradient(90deg, var(--mb-link) 0 9px, var(--mb-field-bg) 9px 11px);
}

progress::-moz-progress-bar {
  background: repeating-linear-gradient(90deg, var(--mb-link) 0 9px, var(--mb-field-bg) 9px 11px);
}

details {
  margin: 0 0 6px;
}

summary {
  cursor: pointer;
  font-weight: bold;
}

/* Menu a tendina: <details class="mb-dropdown"> con <summary> + <menu> */
details.mb-dropdown {
  position: relative;
  display: inline-block;
  margin: 0;
}

details.mb-dropdown > summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px 3px;
  background: var(--mb-face);
  color: var(--mb-text);
  font-family: var(--mb-font);
  font-size: var(--mb-font-size);
  font-weight: normal;
  border: 1px solid;
  border-color: var(--mb-bevel-raised-border);
  box-shadow: var(--mb-bevel-raised-inner);
}

details.mb-dropdown > summary::-webkit-details-marker,
details.mb-dropdown > summary::marker {
  display: none;
  content: "";
}

/* Freccia squadrata dopo l'etichetta */
details.mb-dropdown > summary::after {
  content: "▾";
  font-size: 9px;
}

/* Summary "affondato" quando il menu è aperto */
details.mb-dropdown[open] > summary {
  border-color: var(--mb-bevel-sunken-border);
  box-shadow: var(--mb-bevel-sunken-inner);
}

/* Il pannello che compare: <menu> in verticale, flottante */
details.mb-dropdown > menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 0;
  min-width: 100%;
  width: max-content;
  margin: 1px 0 0;
  padding: 2px;
  background: var(--mb-face);
  border: 1px solid;
  border-color: var(--mb-bevel-raised-border);
  box-shadow: var(--mb-bevel-raised-inner), 2px 2px 0 rgb(0 0 0 / 25%);
}

details.mb-dropdown > menu button {
  display: block;
  width: 100%;
  min-height: 0;
  padding: 3px 18px 3px 8px;
  text-align: left;
  background: none;
  border: 0;
  box-shadow: none;
  font-weight: normal;
}

details.mb-dropdown > menu button:hover:not(:disabled) {
  background: var(--mb-link);
  color: var(--mb-white);
}

/* ==========================================================================
   10. UTILITIES
   ========================================================================== */

.mb-right { margin-left: auto; }
.mb-grow  { flex: 1; }