:root {
  --brand-blue: #004c7b;
  --brand-blue-dark: #072f48;
  --brand-green: #39ae6e;
  --brand-green-light: #acfdc0;
  --brand-cyan-light: #c6fdff;
  --brand-grey: #cecece;
  --surface: #ffffff;
  --surface-subtle: #f5f8fa;
  --text: #072f48;
  --text-muted: #526775;
  --border: #ced8de;
  --border-strong: #7c929f;
  --danger: #b42318;
  --danger-surface: #fff1f0;
  --success: #167447;
  --success-surface: #edf9f2;
  --shadow: 0 24px 70px rgba(7, 47, 72, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  min-height: 100%;
}

body {
  margin: 0;
}

button,
input {
  font: inherit;
}

.login-page {
  min-width: 320px;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 16%, rgba(198, 253, 255, 0.7), transparent 24rem),
    radial-gradient(circle at 90% 86%, rgba(172, 253, 192, 0.42), transparent 22rem),
    var(--surface-subtle);
  font-family: "Montserrat", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.login-shell {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(430px, 1.1fr);
  width: 100%;
  height: 100%;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  background: var(--surface);
}

/*
 * Il padding sinistro compensa il margin negativo del clip-path sul logo
 * (-12.57% della sua larghezza), così l'area di rispetto richiesta dal
 * Brand Book resta visivamente rispettata.
 */
.login-brand {
  --logo-w: clamp(340px, 23vw, 440px);
  --logo-gap: calc(var(--logo-w) / 0.7482 * 0.1257);

  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
  padding: 56px 56px 48px calc(56px + var(--logo-gap));
  overflow: hidden;
  color: var(--surface);
  background: var(--brand-blue);
  isolation: isolate;
}

.login-brand::after {
  position: absolute;
  z-index: -1;
  content: "";
  border-radius: 50%;
}

/*
 * Accento verde ancorato all'angolo inferiore: resta un elemento grafico di
 * supporto (mai superficie estesa), coerente con ADR-0017.
 */
.login-brand::after {
  right: -60px;
  bottom: -60px;
  width: 260px;
  height: 260px;
  background: rgba(57, 174, 110, 0.18);
}

/*
 * Gli asset di brand sono su canvas A4 (3508x2481) con ampio margine trasparente.
 * Il logo occupa il box 441,938 -> 3066,1540. Lo ritagliamo con clip-path e
 * compensiamo con un margin negativo proporzionale, così la resa non dipende da
 * offset in px da ritarare a ogni breakpoint.
 * Se in futuro gli asset verranno ritagliati al bounding box (o sostituiti da
 * SVG), qui basta rimuovere clip-path e margin.
 */
.login-brand__logo {
  display: block;
  width: calc(var(--logo-w) / 0.7482);
  height: auto;
  margin:
    calc(var(--logo-w) / 0.7482 * -0.378)
    0
    calc(var(--logo-w) / 0.7482 * -0.3794)
    calc(var(--logo-w) / 0.7482 * -0.1257);
  clip-path: inset(37.8% 12.6% 37.94% 12.57%);
}

.login-card__eyebrow {
  margin: 0 0 14px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.login-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: min(100%, 520px);
  min-height: 0;
  margin: 0 auto;
  padding: 64px;
  overflow-y: auto;
}

.login-card__header {
  margin-bottom: 36px;
}

.login-card__eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--brand-blue);
}

.login-card__eyebrow::before {
  width: 8px;
  height: 8px;
  content: "";
  background: var(--brand-green);
  border-radius: 50%;
}

.login-card h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.login-card__header > p:last-child {
  margin: 12px 0 0;
  color: var(--text-muted);
}

.login-form fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.login-form .form-group {
  margin-bottom: 22px;
}

.login-form .form-group:last-child {
  margin-bottom: 28px;
}

.login-form label {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 700;
}

.login-input {
  display: block;
  width: 100%;
  height: 52px;
  padding: 0 16px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  outline: none;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.login-input:hover {
  border-color: var(--brand-blue);
}

.login-input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 4px rgba(0, 76, 123, 0.2);
}

.login-input:-webkit-autofill {
  -webkit-text-fill-color: var(--text);
  box-shadow: 0 0 0 1000px var(--surface) inset;
}

.login-submit,
.login-sso {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  min-height: 52px;
  padding: 12px 20px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  border-radius: 10px;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.login-submit {
  color: var(--surface);
  background: var(--brand-blue);
  border: 1px solid var(--brand-blue);
}

.login-submit:hover {
  background: var(--brand-blue-dark);
  border-color: var(--brand-blue-dark);
}

.login-submit:active,
.login-sso:active {
  transform: translateY(1px);
}

.login-submit:focus-visible,
.login-sso:focus-visible,
.login-card__footer a:focus-visible {
  outline: 3px solid var(--brand-blue);
  outline-offset: 3px;
}

.login-sso {
  color: var(--brand-blue);
  background: var(--surface);
  border: 1px solid var(--brand-blue);
}

.login-sso:hover {
  color: var(--surface);
  background: var(--brand-blue);
}

/*
 * Quando l'SSO è attivo è il percorso di accesso preferito: prende il peso
 * visivo del primario e il submit credenziali degrada a secondario.
 * Senza SSO, `.login-submit` resta l'unico primario.
 */
.login-sso--primary {
  color: var(--surface);
  background: var(--brand-blue);
  border-color: var(--brand-blue);
}

.login-sso--primary:hover {
  color: var(--surface);
  background: var(--brand-blue-dark);
  border-color: var(--brand-blue-dark);
}

.login-submit--secondary {
  color: var(--brand-blue);
  background: var(--surface);
  border-color: var(--brand-blue);
}

.login-submit--secondary:hover {
  color: var(--surface);
  background: var(--brand-blue);
  border-color: var(--brand-blue);
}

/* Stato di invio: evita il doppio submit e dà un riscontro visivo all'attesa. */
.login-submit[aria-busy="true"],
.login-sso[aria-busy="true"] {
  pointer-events: none;
  opacity: 0.72;
}

.login-submit[aria-busy="true"]::after,
.login-sso[aria-busy="true"]::after {
  width: 16px;
  height: 16px;
  content: "";
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: login-spin 700ms linear infinite;
}

@keyframes login-spin {
  to {
    transform: rotate(360deg);
  }
}

.microsoft-mark {
  display: grid;
  grid-template-columns: repeat(2, 7px);
  grid-template-rows: repeat(2, 7px);
  gap: 2px;
}

.microsoft-mark i {
  display: block;
  background: currentColor;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 28px 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
}

.login-divider::before,
.login-divider::after {
  flex: 1;
  height: 1px;
  content: "";
  background: var(--border);
}

.login-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin-top: 32px;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.login-card__footer a {
  color: var(--brand-blue);
  font-weight: 700;
  text-underline-offset: 3px;
}

.login-notifications {
  position: fixed;
  z-index: 10;
  top: 24px;
  left: 50%;
  width: min(560px, calc(100% - 32px));
  transform: translateX(-50%);
}

.login-notifications:empty {
  display: none;
}

.login-notifications .message {
  position: relative;
  margin-bottom: 10px;
  padding: 14px 44px 14px 18px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 5px solid var(--brand-blue);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(7, 47, 72, 0.16);
  cursor: pointer;
}

.login-notifications .message::after {
  position: absolute;
  top: 50%;
  right: 17px;
  content: "×";
  color: currentColor;
  font-size: 1.2rem;
  transform: translateY(-52%);
}

.login-notifications .message.error {
  color: var(--danger);
  background: var(--danger-surface);
  border-color: rgba(180, 35, 24, 0.28);
  border-left-color: var(--danger);
}

.login-notifications .message.success {
  color: var(--success);
  background: var(--success-surface);
  border-color: rgba(22, 116, 71, 0.28);
  border-left-color: var(--success);
}

.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  white-space: nowrap;
  border: 0;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
}

@media (max-width: 820px) {
  .login-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
  }

  /*
   * La fascia si dimensiona sul logo invece di essere fissa: con un'altezza
   * rigida il logo la satura e finisce a filo del bordo superiore.
   */
  /*
   * Il clip-path ritaglia il 37.9% sopra e sotto: senza compensare anche la
   * verticale la fascia si stringe sul logo e il payoff finisce a filo bordo.
   */
  .login-brand {
    --logo-w: 200px;
    --logo-gap: calc(var(--logo-w) / 0.7482 * 0.1257);

    min-height: 0;
    padding: calc(32px + var(--logo-gap)) 36px calc(32px + var(--logo-gap))
      calc(36px + var(--logo-gap));
  }

  .login-card {
    width: 100%;
    padding: 48px 36px;
  }
}

@media (max-width: 480px) {
  .login-brand {
    --logo-w: 165px;
    --logo-gap: calc(var(--logo-w) / 0.7482 * 0.1257);

    padding: calc(26px + var(--logo-gap)) 24px calc(26px + var(--logo-gap))
      calc(24px + var(--logo-gap));
  }

  .login-card {
    justify-content: flex-start;
    padding: 38px 24px 32px;
  }

  .login-card__header {
    margin-bottom: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}