/* =====================================================
   STORIA DELL'ITALIA 1946–2025 — Main Stylesheet
   ===================================================== */

/* ── CSS Custom Properties ──────────────────────────── */
:root {
  --green:        #009246;
  --green-dark:   #007a3a;
  --green-light:  #e6f4ec;
  --white:        #ffffff;
  --red:          #CE2B37;
  --red-dark:     #a82230;
  --red-light:    #fbeaeb;
  --blue:         #0066CC;
  --blue-dark:    #004fa3;
  --blue-light:   #e6f0fa;
  --gray-50:      #f8f9fa;
  --gray-100:     #f1f3f5;
  --gray-200:     #e9ecef;
  --gray-300:     #dee2e6;
  --gray-400:     #ced4da;
  --gray-500:     #adb5bd;
  --gray-600:     #6c757d;
  --gray-700:     #495057;
  --gray-800:     #343a40;
  --gray-900:     #212529;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:    0 4px 12px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:    0 10px 30px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.08);
  --shadow-xl:    0 20px 50px rgba(0,0,0,.15);
  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    18px;
  --radius-xl:    24px;
  --transition:   0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-serif:   'Playfair Display', Georgia, serif;
  --header-h:     200px;
  --controls-h:   72px;
  --timeline-w:   4px;
  --dot-size:     18px;
}

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

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

body {
  font-family: var(--font-sans);
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }

.sr-only {
  position: absolute; width:1px; height:1px; padding:0;
  margin:-1px; overflow:hidden; clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}

/* ── HEADER ─────────────────────────────────────────── */
#site-header {
  position: relative;
  background: linear-gradient(135deg, #004fa3 0%, #0066CC 40%, #1a7fd4 100%);
  color: var(--white);
  overflow: hidden;
  padding: 0 0 40px;
}

#site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0,146,70,.25) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(206,43,55,.2) 0%, transparent 60%);
  pointer-events: none;
}

#site-header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 40px;
  background: var(--gray-50);
  clip-path: ellipse(55% 100% at 50% 100%);
}

.flag-stripe {
  display: flex;
  width: 100%;
  height: 6px;
}
.stripe { flex: 1; }
.stripe.green { background: var(--green); }
.stripe.white { background: rgba(255,255,255,.9); }
.stripe.red   { background: var(--red); }

.header-inner {
  position: relative;
  z-index: 1;
}

.header-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 20px;
  text-align: center;
}

.header-icon {
  font-size: 3.5rem;
  margin-bottom: 16px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,.2));
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.site-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  text-shadow: 0 2px 12px rgba(0,0,0,.25);
  margin-bottom: 12px;
}

.site-subtitle {
  font-size: clamp(.95rem, 2.5vw, 1.15rem);
  font-weight: 400;
  opacity: .9;
  letter-spacing: .01em;
}

.year-range {
  background: rgba(255,255,255,.18);
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 600;
  backdrop-filter: blur(4px);
}

/* ── CONTROLS BAR ───────────────────────────────────── */
#controls-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  will-change: transform;
}

.controls-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* Search */
.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 340px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-500);
  font-size: .9rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 40px;
  padding: 0 40px 0 36px;
  border: 2px solid var(--gray-200);
  border-radius: 20px;
  font-family: var(--font-sans);
  font-size: .9rem;
  background: var(--gray-50);
  color: var(--gray-900);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
}

.search-input:focus {
  border-color: var(--blue);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(0,102,204,.12);
}

.search-input::placeholder { color: var(--gray-400); }

.clear-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  border: none;
  background: var(--gray-200);
  color: var(--gray-600);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  transition: background var(--transition), color var(--transition);
}

.clear-btn:hover { background: var(--gray-300); color: var(--gray-900); }

/* Decade filters */
.filters-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.decade-btn {
  height: 34px;
  padding: 0 14px;
  border: 2px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-700);
  border-radius: 17px;
  font-family: var(--font-sans);
  font-size: .8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}

.decade-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: var(--blue-light);
}

.decade-btn.active {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(0,102,204,.3);
}

/* Results counter */
.results-counter {
  font-size: .8rem;
  color: var(--gray-600);
  white-space: nowrap;
  margin-left: auto;
}

/* ── MAIN / TIMELINE ────────────────────────────────── */
#main-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 16px 80px;
}

.timeline-container {
  position: relative;
  padding-left: 40px;
}

/* Central vertical line */
.timeline-container::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: var(--timeline-w);
  background: linear-gradient(to bottom,
    var(--green) 0%,
    var(--white) 33%,
    var(--red) 66%,
    var(--blue) 100%
  );
  border-radius: 2px;
}

/* ── DECADE BLOCK ───────────────────────────────────── */
.decade-block {
  margin-bottom: 8px;
}

.decade-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  margin-left: -28px;
  position: relative;
}

.decade-marker {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: .85rem;
  box-shadow: 0 4px 12px rgba(0,102,204,.35);
  flex-shrink: 0;
  z-index: 2;
  position: relative;
}

.decade-label {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-800);
}

/* ── YEAR GROUP ─────────────────────────────────────── */
.year-group {
  margin-bottom: 16px;
}

.year-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: -32px;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.year-dot {
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--blue);
  box-shadow: 0 0 0 3px rgba(0,102,204,.15);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.year-number {
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue-dark);
  letter-spacing: .03em;
}

/* ── CARDS GRID ─────────────────────────────────────── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 8px;
}

/* ── EVENT CARD ─────────────────────────────────────── */
.event-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  cursor: pointer;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
  will-change: transform;
  position: relative;
  display: flex;
  flex-direction: column;
  animation: cardAppear .4s ease both;
}

@keyframes cardAppear {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.event-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-light);
}

.event-card:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

.event-card:active { transform: translateY(-1px); }

/* Card — Fun badge */
.event-card.fun-event {
  border-color: #f5a623;
}

.event-card.fun-event:hover {
  border-color: #e09410;
  box-shadow: 0 10px 30px rgba(245,166,35,.2);
}

/* Card image */
.card-img-wrap {
  position: relative;
  width: 100%;
  height: 150px;
  background: var(--gray-100);
  overflow: hidden;
  flex-shrink: 0;
}

.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.event-card:hover .card-img-wrap img {
  transform: scale(1.05);
}

.card-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  color: var(--gray-500);
}

.card-img-placeholder .placeholder-year {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--gray-400);
  font-family: var(--font-serif);
}

.card-img-placeholder .placeholder-icon {
  font-size: 1.8rem;
}

/* Card year badge overlay */
.card-year-overlay {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0,0,0,.55);
  color: var(--white);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .04em;
  backdrop-filter: blur(4px);
}

/* Fun badge overlay */
.fun-badge-overlay {
  position: absolute;
  top: 10px;
  right: 10px;
  background: linear-gradient(135deg, #f5a623, #e09410);
  color: var(--white);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .04em;
  box-shadow: 0 2px 6px rgba(245,166,35,.5);
}

/* Card body */
.card-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.35;
  margin-bottom: 6px;
}

.card-desc {
  font-size: .82rem;
  color: var(--gray-600);
  line-height: 1.5;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--gray-100);
}

.card-source {
  font-size: .72rem;
  color: var(--gray-400);
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-arrow {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--blue-light);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.event-card:hover .card-arrow {
  background: var(--blue);
  color: var(--white);
}

/* ── NO RESULTS ─────────────────────────────────────── */
.no-results {
  text-align: center;
  padding: 80px 20px;
  color: var(--gray-500);
}

.no-results i {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.no-results p {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.btn-reset {
  background: var(--blue);
  color: var(--white);
  border: none;
  padding: 10px 24px;
  border-radius: 20px;
  font-family: var(--font-sans);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.btn-reset:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
}

/* ── MODAL ──────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn .2s ease;
  overflow-y: auto;
}

.modal-overlay[hidden] { display: none; }

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

.modal-box {
  background: var(--white);
  border-radius: var(--radius-xl);
  max-width: 540px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  position: relative;
  animation: slideUp .25s cubic-bezier(0.34, 1.56, 0.64, 1);
  scrollbar-width: thin;
  scrollbar-color: var(--gray-300) transparent;
}

@keyframes slideUp {
  from { transform: translateY(30px) scale(.97); opacity:0; }
  to   { transform: translateY(0) scale(1); opacity:1; }
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,.06);
  color: var(--gray-700);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  z-index: 10;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.modal-close:hover {
  background: var(--red-light);
  color: var(--red);
  transform: scale(1.1);
}

.modal-img-wrap {
  width: 100%;
  height: 220px;
  overflow: hidden;
  background: var(--gray-100);
}

.modal-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-body {
  padding: 24px;
}

.modal-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.modal-year-badge {
  background: var(--blue-light);
  color: var(--blue-dark);
  padding: 3px 12px;
  border-radius: 12px;
  font-weight: 700;
  font-size: .85rem;
}

.fun-badge {
  background: linear-gradient(135deg, #f5a623, #e09410);
  color: var(--white);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: .78rem;
  font-weight: 700;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.3;
  margin-bottom: 12px;
}

.modal-desc {
  font-size: .95rem;
  color: var(--gray-600);
  line-height: 1.65;
  margin-bottom: 20px;
}

.modal-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 20px;
  font-size: .88rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 3px 10px rgba(0,102,204,.3);
}

.modal-link-btn:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,102,204,.35);
}

/* ── BACK TO TOP ────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 150;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 4px 14px rgba(0,102,204,.4);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.back-to-top:hover {
  background: var(--blue-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,102,204,.45);
}

.back-to-top[hidden] { display: none; }

/* ── FOOTER ─────────────────────────────────────────── */
#site-footer {
  background: var(--gray-900);
  color: var(--gray-400);
  text-align: center;
  padding: 32px 20px;
}

.footer-inner {
  max-width: 700px;
  margin: 0 auto;
}

#site-footer p {
  font-size: .9rem;
  line-height: 1.6;
}

#site-footer strong {
  color: var(--white);
}

.footer-note {
  font-size: .78rem !important;
  margin-top: 8px;
  color: var(--gray-600) !important;
}

/* ── HIGHLIGHT SEARCH ───────────────────────────────── */
mark {
  background: rgba(255, 214, 0, .45);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}

/* ── SCROLLBAR STYLE ────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--gray-300);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* ── REDUCED MOTION ─────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .header-icon { animation: none; }
}

/* ── RESPONSIVE: Tablet ─────────────────────────────── */
@media (max-width: 768px) {
  :root { --header-h: 160px; }

  .header-content { padding: 36px 20px 16px; }
  .header-icon { font-size: 2.8rem; }

  .controls-inner { padding: 8px 12px; gap: 8px; }
  .search-wrapper { max-width: 100%; min-width: 0; width: 100%; }
  .filters-wrapper { order: 3; width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; }
  .results-counter { order: 2; }

  .filters-wrapper::-webkit-scrollbar { height: 2px; }

  #main-content { padding: 24px 12px 60px; }

  .timeline-container { padding-left: 32px; }
  .timeline-container::before { left: 7px; }

  .decade-header { margin-left: -22px; }
  .year-label { margin-left: -26px; }

  .cards-grid { grid-template-columns: 1fr; gap: 12px; }

  .modal-box { max-height: 85vh; border-radius: var(--radius-lg); }
  .modal-img-wrap { height: 180px; }
  .modal-title { font-size: 1.2rem; }

  .back-to-top { bottom: 16px; right: 16px; width: 42px; height: 42px; }
}

/* ── RESPONSIVE: Mobile small ───────────────────────── */
@media (max-width: 480px) {
  .decade-btn { font-size: .75rem; padding: 0 10px; height: 30px; }
  .card-img-wrap { height: 130px; }
  .modal-img-wrap { height: 150px; }
}

/* ── RESPONSIVE: Wide screen ────────────────────────── */
@media (min-width: 1200px) {
  .cards-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ── CATEGORY COLORS ────────────────────────────────── */
.event-card[data-cat="politica"]    { --card-accent: var(--blue); }
.event-card[data-cat="tragedia"]    { --card-accent: var(--red); }
.event-card[data-cat="sport"]       { --card-accent: var(--green); }
.event-card[data-cat="economia"]    { --card-accent: #6f42c1; }
.event-card[data-cat="cultura"]     { --card-accent: #fd7e14; }
.event-card[data-cat="scienza"]     { --card-accent: #17a2b8; }
.event-card[data-cat="societa"]     { --card-accent: #e83e8c; }

.event-card .card-footer { border-top-color: color-mix(in srgb, var(--card-accent, var(--blue)) 15%, transparent); }

/* ── LOADING STATE ──────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}