/* ============================================
   MILAN NEL CUORE — Stili Globali
   Variabili CSS, reset, tipografia, layout base
   ============================================ */

/* --- Variabili CSS Globali --- */
:root {
  /* Colori principali */
  --rosso-primario: #AC1A2F;
  --rosso-accento: #E4002B;
  --nero-profondo: #0D0D0D;
  --nero-milan: #1A1A1A;
  --grigio-scuro: #2C2C2C;
  --grigio-medio: #909090;
  --grigio-chiaro: #B0B0B0;
  --bianco-sporco: #F5F5F5;
  --bianco-puro: #FFFFFF;
  --oro-accento: #C5A44E;

  /* Gradienti */
  --gradiente-hero: linear-gradient(135deg, var(--nero-profondo) 0%, var(--rosso-primario) 100%);
  --gradiente-card: linear-gradient(145deg, rgba(44, 44, 44, 0.6) 0%, rgba(26, 26, 26, 0.8) 100%);
  --gradiente-btn: linear-gradient(135deg, var(--rosso-primario) 0%, var(--rosso-accento) 100%);

  /* Tipografia */
  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-accent: 'Montserrat', sans-serif;

  /* Dimensioni font responsive con clamp */
  --fs-hero: clamp(2.5rem, 6vw, 5rem);
  --fs-hero-sub: clamp(1.1rem, 2.5vw, 1.5rem);
  --fs-h1: clamp(2rem, 4vw, 3.5rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.5rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.75rem);
  --fs-body: clamp(0.95rem, 1.5vw, 1.1rem);
  --fs-small: clamp(0.8rem, 1.2vw, 0.9rem);

  /* Spaziature */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  --spacing-2xl: 8rem;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50%;

  /* Ombre */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(172, 26, 47, 0.3);

  /* Glassmorphism */
  --glass-bg: rgba(26, 26, 26, 0.7);
  --glass-border: rgba(172, 26, 47, 0.3);
  --glass-blur: 12px;

  /* Transizioni */
  --transition-fast: 0.2s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Z-index */
  --z-navbar: 1000;
  --z-modal: 2000;
  --z-overlay: 1500;

  /* Sfondi opachi per sticky columns classifica */
  --bg-card: var(--nero-profondo);
  --bg-nav: var(--nero-profondo);

  /* Larghezza massima contenuto */
  --max-width: 1200px;
  --max-width-lg: 1400px;
}

/* --- Reset CSS --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--bianco-sporco);
  background-color: var(--nero-profondo);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Tipografia globale --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--bianco-puro);
  text-transform: uppercase;
  letter-spacing: 1px;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--grigio-chiaro);
}

a {
  color: var(--rosso-accento);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--bianco-puro);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

/* ========================
   INDICATORI DI FOCUS — WCAG 2.4.7
   Visibili per navigazione da tastiera, nascosti per mouse
   ======================== */
:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 3px solid var(--rosso-accento);
  outline-offset: 3px;
  border-radius: 4px;
}

input, textarea, select {
  font-family: var(--font-body);
  font-size: var(--fs-body);
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-lg {
  max-width: var(--max-width-lg);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.section-title h2 {
  display: inline-block;
  position: relative;
  padding-bottom: var(--spacing-sm);
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradiente-btn);
  border-radius: 2px;
}

.section-title p {
  margin-top: var(--spacing-sm);
  font-size: var(--fs-body);
  color: var(--grigio-chiaro);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-rosso { color: var(--rosso-accento); }
.text-oro { color: var(--oro-accento); }

/* --- Scrollbar personalizzata --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--nero-profondo);
}

::-webkit-scrollbar-thumb {
  background: var(--grigio-scuro);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--rosso-primario);
}

/* --- Selezione testo --- */
::selection {
  background: var(--rosso-primario);
  color: var(--bianco-puro);
}

/* --- Stile globale per le sezioni con sfondo alternato --- */
.section-alt {
  background-color: var(--nero-milan);
}

/* --- Skip link per accessibilità --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--rosso-primario);
  color: var(--bianco-puro);
  padding: var(--spacing-xs) var(--spacing-sm);
  z-index: calc(var(--z-navbar) + 1);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* ========================
   LIGHT MODE — Variabili tema chiaro
   ======================== */
[data-theme="light"] {
  --nero-profondo: #F5F5F5;
  --nero-milan: #EBEBEB;
  --grigio-scuro: #DCDCDC;
  --grigio-medio: #595959;
  --grigio-chiaro: #4A4A4A;
  --bianco-sporco: #1A1A1A;
  --bianco-puro: #0D0D0D;
  --gradiente-card: linear-gradient(145deg, rgba(235, 235, 235, 0.8) 0%, rgba(220, 220, 220, 0.6) 100%);
  --glass-bg: rgba(245, 245, 245, 0.85);
  --glass-border: rgba(172, 26, 47, 0.2);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px rgba(172, 26, 47, 0.15);
}

[data-theme="light"] ::selection {
  background: var(--rosso-primario);
  color: #FFFFFF;
}

[data-theme="light"] .navbar.scrolled {
  background: rgba(245, 245, 245, 0.95);
}

[data-theme="light"] ::-webkit-scrollbar-track {
  background: #F5F5F5;
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: #CCCCCC;
}

/* ========================
   PULSANTE "TORNA SU"
   ======================== */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--rosso-primario);
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), background var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn i {
  color: #FFFFFF;
  font-size: 1.3rem;
}

.scroll-top-btn:hover {
  background: var(--rosso-accento);
  transform: translateY(-3px);
}

/* ========================
   BREADCRUMB
   ======================== */
.breadcrumb {
  padding: 0.75rem 0;
  font-size: var(--fs-small);
  color: var(--grigio-medio);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb-list a {
  color: var(--grigio-chiaro);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-list a:hover {
  color: var(--rosso-accento);
}

.breadcrumb-separator {
  color: var(--grigio-scuro);
  font-size: 0.7rem;
}

.breadcrumb-current {
  color: var(--rosso-accento);
  font-weight: 500;
}

/* ========================
   TOGGLE TEMA (Dark/Light)
   ======================== */
.theme-toggle {
  background: none;
  border: 2px solid var(--grigio-medio);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--bianco-sporco);
  font-size: 1rem;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle i {
  color: var(--bianco-sporco);
  font-size: 1.1rem;
}

.theme-toggle:hover {
  border-color: var(--rosso-primario);
  color: var(--rosso-accento);
}

.theme-toggle:hover i {
  color: var(--rosso-accento);
}

/* ========================
   BARRA DI RICERCA
   ======================== */
.search-toggle {
  background: none;
  border: none;
  color: var(--grigio-chiaro);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.3rem;
  transition: color var(--transition-fast);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-toggle:hover {
  color: var(--rosso-accento);
}

.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: calc(var(--z-modal) + 1);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-container {
  width: 90%;
  max-width: 640px;
}

.search-input-wrap {
  position: relative;
  margin-bottom: var(--spacing-md);
}

.search-input-wrap i {
  position: absolute;
  left: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--grigio-medio);
  font-size: 1.1rem;
}

.search-input {
  width: 100%;
  padding: 1.1rem 1.2rem 1.1rem 3.2rem;
  background: var(--nero-milan);
  border: 2px solid var(--grigio-scuro);
  border-radius: var(--radius-lg);
  color: var(--bianco-puro);
  font-size: 1.1rem;
  font-family: var(--font-body);
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--rosso-primario);
}

.search-input:focus-visible {
  outline: 3px solid var(--rosso-accento);
  outline-offset: 2px;
}

.search-input::placeholder {
  color: var(--grigio-medio);
}

.search-close {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--grigio-medio);
  font-size: 1.2rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-close:hover {
  color: var(--rosso-accento);
}

.search-results {
  max-height: 50vh;
  overflow-y: auto;
  background: var(--nero-milan);
  border: 1px solid var(--grigio-scuro);
  border-radius: var(--radius-md);
}

.search-results:empty {
  display: none;
}

.search-result-item {
  display: block;
  padding: 1rem 1.2rem;
  color: var(--grigio-chiaro);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background var(--transition-fast);
}

.search-result-item:hover {
  background: rgba(172, 26, 47, 0.1);
  color: var(--bianco-puro);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--bianco-puro);
  margin-bottom: 0.2rem;
}

.search-result-page {
  font-size: 0.75rem;
  color: var(--rosso-accento);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.search-result-snippet {
  font-size: var(--fs-small);
  color: var(--grigio-medio);
  margin-top: 0.2rem;
}

.search-no-results {
  padding: 2rem;
  text-align: center;
  color: var(--grigio-medio);
  font-size: var(--fs-small);
}

/* ========================
   LANGUAGE SWITCHER
   ======================== */
.lang-switch {
  display: flex;
  align-items: center;
  border: 2px solid var(--grigio-medio);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--grigio-chiaro);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-accent);
  letter-spacing: 1px;
  min-height: 36px;
}

.lang-btn.active {
  background: var(--rosso-primario);
  color: #FFFFFF;
}

.lang-btn:hover:not(.active) {
  color: var(--bianco-puro);
}

/* ========================
   TRANSIZIONI TRA PAGINE
   ======================== */

/* Animazione body: solo opacity, nessun transform
   (transform su body causa bug di compositing su iOS Safari/WebKit
   dove il titolo page-header scende durante lo scroll) */
@keyframes bodyFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Animazione con slide-up per View Transitions (pseudo-elementi overlay, sicura) */
@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pageExit {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

body {
  animation: bodyFadeIn 0.4s ease-out;
}

body.page-exit {
  animation: pageExit 0.2s ease-in forwards;
}

/* View Transitions API (browser moderni) */
@view-transition {
  navigation: auto;
}

::view-transition-old(root) {
  animation: pageExit 0.2s ease-in;
}

::view-transition-new(root) {
  animation: pageEnter 0.3s ease-out;
}