/* ═══════════════════════════════════════
   css/layout.css - Museo Nola
   Layout principale, header, menu, bottom nav
   ═══════════════════════════════════════ */

/* ─── RESET BASE ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body, 'Open Sans', sans-serif);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text, #1a1a2e);
  background: var(--color-bg, #f5f5f5);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
a { text-decoration: none; color: inherit; }

/* ─── APP CONTAINER ─── */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── SPLASH ─── */
.splash {
  position: fixed;
  inset: 0;
  background: #31576e;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease;
}
.splash.fade-out { opacity: 0; pointer-events: none; }
.splash-title {
  color: white;
  font-family: var(--font-display, 'Playfair Display', serif);
  font-size: 24px;
  text-align: center;
}
.splash-loader {
  width: 40px;
  height: 4px;
  background: rgba(255,255,255,0.3);
  border-radius: 2px;
  margin-top: 32px;
  overflow: hidden;
}
.splash-loader::after {
  content: '';
  display: block;
  width: 30%;
  height: 100%;
  background: #e8734a;
  animation: splashAnim 1.5s infinite;
}
@keyframes splashAnim {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* ─── HEADER ─── */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--color-header-bg, #b8cdd6);
  z-index: 200;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.header-left { flex-shrink: 0; display: flex; align-items: center; }
.header-logo { height: 32px; width: auto; }
.header-center {
  flex: 1;
  display: flex;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: #31576e;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.header-right { flex-shrink: 0; }
.btn-menu {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #31576e;
}

/* ─── DESKTOP NAV BAR ─── */
.desktop-nav {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: #31576e;
  z-index: 199;
  padding: 0 24px;
  overflow-x: auto;
  white-space: nowrap;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}
.desktop-nav-item {
  display: inline-flex;
  align-items: center;
  padding: 12px 18px;
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
  white-space: nowrap;
}
.desktop-nav-item:hover,
.desktop-nav-item.active {
  color: white;
  border-bottom-color: #e8734a;
  background: rgba(255,255,255,0.08);
}

/* ─── PANEL VIEWPORT ─── */
.panel-viewport {
  flex: 1;
  width: 100%;
  min-height: 100vh;
  padding-top: 56px;
  padding-bottom: 64px;
}
.panel {
  display: block;
  padding: 16px;
  width: 100%;
  animation: panelIn 0.3s ease forwards;
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── PANEL HEADER ───
   Font, colore, dimensione e posizionamento uguali alla sezione
   "Sotto la Cenere" (panels/cenere.html): pulsante "‹" su una riga
   propria sopra il titolo (non più affiancato), titolo sotto, centrato.
   Changelog: prima era una riga unica (icona + titolo maiuscolo piccolo
   colore accento, allineati a sinistra); ora è impilato come Cenere.
   Bug corretto: il padding laterale di .panel-header era 0, appoggiato
   solo al padding di 16px del genitore .panel (css/layout.css) — ma su
   schermi stretti una regola più specifica in index.html azzera il
   padding di ".panel" (#viewport .panel { padding: 0 } sotto 600px),
   lasciando così il pulsante "‹" e il titolo attaccati al bordo sinistro.
   Cenere (panels/cenere.html) non ha questo problema perché il suo
   involucro interno ha un padding laterale PROPRIO di 16px, indipendente
   da ".panel". Stessa soluzione applicata qui: 16px laterali propri su
   .panel-header, così il margine resta uguale a Cenere a ogni larghezza. */
.panel-header {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 8px 16px 0 16px;
  margin-bottom: 8px;
}
.panel-header .btn-back {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  background: transparent;
  border: none;
  color: #ff6a4c;
  font-size: 24px;
  font-weight: 600;
  font-family: 'Open Sans', sans-serif;
  line-height: 1;
  padding: 2px 0;
  cursor: pointer;
  transition: opacity 0.2s;
}
.panel-header .btn-back:hover { opacity: 0.7; }
/* L'icona lucide "chevron-left" usata finora viene nascosta: il pulsante
   mostra invece il carattere "‹" (stesso carattere e stile di Cenere),
   aggiunto via ::before così non serve toccare il markup di ogni pannello. */
.panel-header .btn-back i,
.panel-header .btn-back svg { display: none; }
.panel-header .btn-back::before { content: "\2039"; }
/* Fallback: nell'app il titolo è ora un <h6> (vedi i file in public/panels/),
   che prende lo stile identico da "#viewport .panel h6" in index.html
   (la stessa regola che già vale per "Sotto la Cenere", quindi sempre
   allineati per costruzione). Questa classe resta solo come ripiego se
   .panel-title venisse usata su un tag diverso da h6. */
.panel-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  text-transform: uppercase;
  text-align: center;
  color: #ff6a4c;
  letter-spacing: normal;
  line-height: 1.2;
  margin: 0.3em 0 0.5em 0;
}

/* ─── MENU OVERLAY MOBILE ─── */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  visibility: hidden;
  pointer-events: none;
}
.menu-overlay.open {
  visibility: visible;
  pointer-events: auto;
}
.menu-overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  transition: opacity 0.3s;
}
.menu-overlay.open .menu-overlay-backdrop { opacity: 1; }
.menu-overlay-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  max-width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: #31576e;
  z-index: 501;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.menu-overlay.open .menu-overlay-panel { transform: translateX(0); }
.menu-overlay-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid rgba(232,115,74,0.25);
  flex-shrink: 0;
}
.menu-overlay-close {
  margin-left: auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.menu-overlay-body { flex: 1; overflow-y: auto; padding: 8px 0; }

/* Voci menu */
.menu-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(232,115,74,0.1);
  border-left: 4px solid transparent;
  color: white;
  font-size: 15px;
  font-weight: 500;
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s;
}
.menu-item:active {
  background: rgba(232,115,74,0.2);
  border-left-color: #e8734a;
}
.menu-item-sub {
  padding-left: 44px;
  font-size: 13px;
  font-weight: 400;
  opacity: 0.85;
  background: rgba(0,0,0,0.1);
  border-bottom: 1px solid rgba(232,115,74,0.05);
}

/* ─── BOTTOM NAV ─── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #fff;
  border-top: 1px solid #e5e7eb;
  z-index: 200;
  display: flex;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: #6b7280;
  transition: color 0.2s;
}
.nav-tab.active { color: #e8734a; }
.nav-tab svg { width: 22px; height: 22px; }