/* ==========================================================================
   Scuola Edile Modena — Newsletter
   Archivio delle newsletter con ricerca, filtro per categoria, archivio
   storico opzionale e modale di iscrizione.
   Dipende da css/design-system.css per token, header, footer e Button.

   Sorgente: progetto Claude Design "Scuola Edile sito riporto"
     sito/pagine/Newsletter.dc.html
   ========================================================================== */

:root {
  /* Anche qui il design richiama var(--shadow-2xl), assente da effects.css. */
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

/* --------------------------------------------------------------------------
   1. Testata
   -------------------------------------------------------------------------- */
.nl-hero { background: var(--warm-sand); display: flex; align-items: center; }
.nl-hero__inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px clamp(20px, 4vw, 48px);
}

.nl-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--text-medium);
}
.nl-back:hover { color: var(--text-medium); opacity: 0.7; }

.nl-hero__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 440px), 1fr));
  gap: 64px;
  align-items: center;
}

.nl-eyebrow {
  margin: 0 0 24px;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--terracotta);
}
.nl-title {
  margin: 0 0 32px;
  font-family: var(--font-heading);
  font-size: clamp(34px, 6vw, 60px);
  font-weight: var(--fw-bold);
  line-height: 1.1;
  color: var(--navy);
}
.nl-lead {
  margin: 0 0 48px;
  font-size: var(--text-lg);
  line-height: var(--lh-body);
  color: var(--text-medium);
  text-wrap: pretty;
}

/* .se-underline-link (design-system.css) e' pensato per lo sfondo navy scuro
   delle altre testate: qui .nl-hero ha sfondo chiaro (--warm-sand), quindi
   restava bianco su chiaro, illeggibile. */
.nl-hero .se-underline-link {
  color: var(--navy);
  border-bottom-color: rgba(30, 58, 95, 0.4);
}
.nl-hero .se-underline-link:hover { color: var(--navy); }

/* --------------------------------------------------------------------------
   2. Ricerca e archivio
   -------------------------------------------------------------------------- */
.nl-search { position: relative; margin-bottom: 24px; }
.nl-search__icon {
  position: absolute;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  color: var(--text-medium);
  pointer-events: none;
}
.nl-search__input {
  width: 100%;
  padding: 12px 48px 12px 56px;
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  color: var(--text-dark);
  background: #fff;
  border-radius: var(--radius-button);
  outline: none;
  border: 2px solid var(--border-light);
  transition: border-color var(--transition-smooth);
}
.nl-search.is-active .nl-search__input { border-color: var(--terracotta); }
.nl-search__input::-webkit-search-cancel-button { display: none; }

.nl-search__clear {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  padding: 4px;
  border: none;
  background: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  color: var(--text-medium);
}
.nl-search__clear[hidden] { display: none; }
.nl-search__clear:hover { color: var(--navy); }

.nl-archivio {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.nl-archivio input { width: 16px; height: 16px; accent-color: var(--terracotta); cursor: pointer; }
.nl-archivio span { font-size: var(--text-sm); color: var(--text-medium); }

.nl-feedback { margin: 12px 0 0; font-size: var(--text-sm); color: var(--terracotta); }
.nl-feedback[hidden] { display: none; }

/* --------------------------------------------------------------------------
   3. Riquadro di iscrizione
   -------------------------------------------------------------------------- */
.nl-signup {
  padding: 32px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}
/* Il gradiente navy→terracotta è esclusivo di questa pagina: non è uno dei
   tre gradienti del design system, che vanno tutti navy→navy o terra→terra. */
.nl-signup__tile {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  margin-bottom: 24px;
  border-radius: var(--radius-lg);
  color: #fff;
  background: linear-gradient(135deg, #1E3A5F, #D97941);
}
.nl-signup__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  color: var(--navy);
}
.nl-signup__desc {
  margin: 0 0 24px;
  font-size: var(--text-body-md);
  line-height: var(--lh-body);
  color: var(--text-medium);
}
.nl-signup__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 16px 24px;
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  font-weight: var(--fw-semibold);
  color: #fff;
  background: var(--navy);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: background var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}
.nl-signup__btn:hover { background: var(--navy-hover); transform: translateY(-2px); }
.nl-signup__note { margin: 16px 0 0; text-align: center; font-size: var(--text-xs); color: var(--text-light); }

/* --------------------------------------------------------------------------
   4. Barra filtri sticky
   -------------------------------------------------------------------------- */
.nl-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  background: rgba(250, 250, 248, 0.8);
  border-bottom: 1px solid var(--border-light);
}
.nl-bar__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px clamp(20px, 4vw, 48px);
}
.nl-bar__row {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
}
.nl-bar__icon { display: flex; flex-shrink: 0; color: var(--text-medium); }

.nl-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  font-family: var(--font-body);
  font-size: var(--text-15);
  font-weight: var(--fw-medium);
  white-space: nowrap;
  cursor: pointer;
  border-radius: var(--radius-button);
  background: transparent;
  color: var(--text-medium);
  border: 2px solid var(--border-light);
  transition: transform var(--duration-base) var(--ease-out),
              background var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out);
}
.nl-pill:hover { border-color: var(--slate-300); }
.nl-pill:active { transform: scale(var(--press-scale)); }
.nl-pill.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }

@media (max-width: 1250px) {
  .nl-bar { top: 68px; }
}

/* --------------------------------------------------------------------------
   5. Elenco newsletter
   -------------------------------------------------------------------------- */
.nl-body { padding: 96px 0; background: var(--warm-white); }
.nl-body__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}
.nl-results__head { margin-bottom: 40px; }
.nl-results__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: var(--fw-bold);
  color: var(--navy);
}
.nl-results__count { margin: 8px 0 0; font-size: var(--text-sm); color: var(--text-medium); }

.nl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.nl-card { display: block; height: 100%; text-decoration: none; }
.nl-card[hidden] { display: none; }
.nl-card__box {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-subtle);
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}
.nl-card:hover .nl-card__box { box-shadow: var(--shadow-xl); transform: translateY(-6px); }
.nl-card__bar { height: 6px; width: 100%; }
.nl-card__body { display: flex; flex-direction: column; flex: 1; padding: 24px; }

.nl-card__tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.nl-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  border-radius: var(--radius-pill);
}
.nl-tag--archivio {
  gap: 4px;
  padding: 4px 8px;
  background: rgba(153, 153, 153, 0.09);
  color: var(--text-light);
}

.nl-card__date {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  font-size: var(--text-xs);
  color: var(--text-light);
}
.nl-card__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--fw-bold);
  line-height: 1.3;
  color: var(--navy);
}
.nl-card__excerpt {
  margin: 0 0 20px;
  flex: 1;
  font-size: var(--text-sm);
  line-height: var(--lh-body);
  color: var(--text-medium);
}
.nl-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  margin-top: auto;
  border-top: 1px solid var(--border-light);
}
.nl-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  transition: gap var(--duration-base) var(--ease-out);
}
.nl-card:hover .nl-card__cta { gap: 10px; }

/* --------------------------------------------------------------------------
   6. Nessun risultato
   -------------------------------------------------------------------------- */
.nl-empty { padding: 96px 0; text-align: center; }
.nl-empty[hidden] { display: none; }
.nl-empty__icon { display: flex; justify-content: center; margin-bottom: 24px; opacity: 0.2; color: var(--navy); }
.nl-empty__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  color: var(--navy);
}
.nl-empty p { margin: 0 0 32px; color: var(--text-medium); }
.nl-empty__btn {
  padding: 16px 32px;
  font-family: var(--font-body);
  font-size: var(--text-15);
  font-weight: var(--fw-medium);
  color: #fff;
  background: var(--navy);
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
}
.nl-empty__btn:hover { background: var(--navy-hover); }

/* --------------------------------------------------------------------------
   7. Chiusura
   -------------------------------------------------------------------------- */
.nl-cta { padding: 128px 0; background: var(--warm-sand); }
.nl-cta__box { max-width: 768px; margin: 0 auto; text-align: center; }
.nl-cta__title {
  margin: 0 0 24px;
  font-family: var(--font-heading);
  font-size: clamp(28px, 4.6vw, 48px);
  font-weight: var(--fw-bold);
  line-height: 1.2;
  color: var(--navy);
}
.nl-cta__lead {
  margin: 0 0 48px;
  font-size: var(--text-xl);
  line-height: var(--lh-body);
  color: var(--text-medium);
  text-wrap: pretty;
}
.nl-cta__btn {
  padding: 20px 40px;
  font-family: var(--font-body);
  font-size: var(--text-body-md);
  font-weight: var(--fw-medium);
  color: #fff;
  background: var(--navy);
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: background var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}
.nl-cta__btn:hover { background: var(--navy-hover); transform: translateY(-2px); }

/* --------------------------------------------------------------------------
   8. Modale di iscrizione
   -------------------------------------------------------------------------- */
.nl-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  background: rgba(0, 0, 0, 0.3);
}
.nl-modal[hidden] { display: none; }
.nl-modal__panel {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px;
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
}
.nl-modal__close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  padding: 8px;
  border: none;
  background: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  color: var(--text-medium);
}
.nl-modal__close:hover { background: var(--slate-100); color: var(--navy); }

.nl-modal__form { display: flex; flex-direction: column; gap: 16px; }
.nl-modal__input {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: var(--text-15);
  color: var(--navy);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-input);
  outline: none;
  transition: border-color var(--transition-smooth);
}
.nl-modal__input:focus { border-color: var(--terracotta); }
.nl-modal__check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: var(--text-xs);
  line-height: var(--lh-body);
  color: var(--text-medium);
  cursor: pointer;
}
.nl-modal__check input { width: 16px; height: 16px; margin-top: 2px; accent-color: var(--navy); flex-shrink: 0; }

/* --------------------------------------------------------------------------
   9. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .nl-hero__inner { padding: 48px clamp(20px, 4vw, 48px); }
  .nl-hero__grid { gap: 40px; }
  .nl-body { padding: 64px 0; }
  .nl-cta { padding: 80px 0; }
  .nl-signup { padding: 24px; }
}

@media (max-width: 640px) {
  .nl-grid { grid-template-columns: 1fr; }
  .nl-modal__panel { padding: 28px 20px; }
}