/* ============================================
   Questa idea della vita - Static Site CSS
   ============================================ */

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

:root {
  --color-text: #1a1a2e;
  --color-text-light: #64748b;
  --color-text-muted: #94a3b8;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-light: #eef2ff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-tag-bg: #eef2ff;
  --color-tag-text: #4f46e5;
  --color-header-bg: #0f172a;
  --color-footer-bg: #0f172a;
  --max-width: 1600px;
  --sidebar-width: 280px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12), 0 4px 16px rgba(0,0,0,0.06);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'DM Serif Display', Georgia, serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-accent-hover);
}

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

/* ---- HEADER ---- */
.site-header {
  background: var(--color-header-bg);
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.site-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  ring: 2px solid rgba(99,102,241,0.5);
  box-shadow: 0 0 0 2px rgba(99,102,241,0.4);
}

.site-title-group {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.site-tagline {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.45);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all 0.2s ease;
  color: rgba(255,255,255,0.7);
}

.social-link:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}

.social-link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ---- HERO ---- */
.page-hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
  padding: 40px 32px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99,102,241,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 400;
  color: #ffffff;
  margin-bottom: 16px;
  line-height: 1.2;
  position: relative;
}

.page-hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.6);
  max-width: 480px;
  margin: 0 auto;
  font-weight: 400;
  position: relative;
}

/* ---- MAIN LAYOUT ---- */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 32px;
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-width);
  grid-template-rows: auto;
  column-gap: 40px;
  row-gap: 8px;
  align-items: start;
}

.site-main > .widget-search  { grid-column: 1; grid-row: 1; }
.site-main > .widget-tags    { grid-column: 1; grid-row: 2; }
.site-main > main            { grid-column: 2; grid-row: 1 / span 2; }
.site-main > .sidebar-right  { grid-column: 3; grid-row: 1 / span 2; }

/* ---- ARTICLE GRID ---- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

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

.post-card-image {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.post-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.post-card:hover .post-card-image img {
  transform: scale(1.06);
}

.post-card-body {
  padding: 22px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.post-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.post-category {
  font-size: 0.68rem;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  padding: 3px 10px;
  border-radius: 20px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.post-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.post-card-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.post-card-title a:hover {
  color: var(--color-accent);
}

.post-card-excerpt {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: all 0.2s ease;
  letter-spacing: 0.01em;
}

.read-more:hover {
  gap: 10px;
  color: var(--color-accent-hover);
}

.read-more::after {
  content: '→';
}

/* ---- SIDEBAR ---- */
.sidebar {
  position: sticky;
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.sidebar-widget-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border-light);
}

.search-box input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--color-text);
  background: var(--color-bg);
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-cloud a {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--color-bg);
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  padding: 4px 11px;
  border-radius: 20px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.tag-cloud a:hover,
.tag-cloud a.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}

.reading-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.reading-list li {
  font-size: 0.82rem;
  color: var(--color-text-light);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}

.reading-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.7rem;
  top: 3px;
}

.reading-list li strong {
  font-weight: 600;
  color: var(--color-text);
}

/* ---- SINGLE ARTICLE PAGE ---- */
.article-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 32px;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 48px;
  align-items: start;
}

.article-content {
  max-width: 740px;
}

.article-header {
  margin-bottom: 32px;
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: 24px;
  font-weight: 500;
  transition: color 0.2s;
}

.article-back::before {
  content: '←';
}

.article-back:hover {
  color: var(--color-accent);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.article-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 0;
  letter-spacing: -0.01em;
}

.article-featured-image {
  width: 100%;
  border-radius: var(--radius);
  overflow: hidden;
  margin: 28px 0;
  aspect-ratio: 16/9;
  box-shadow: var(--shadow-md);
}

.article-featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-body {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text);
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  margin: 40px 0 14px;
  color: var(--color-text);
  line-height: 1.25;
}

.article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 28px 0 10px;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 20px 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  margin: 28px 0;
  padding: 16px 24px;
  background: var(--color-accent-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-light);
}

.article-body strong {
  font-weight: 600;
  color: var(--color-text);
}

.article-tags {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.article-tags-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-right: 4px;
}

/* ---- FOOTER ---- */
.site-footer {
  background: var(--color-footer-bg);
  padding: 40px 32px;
  margin-top: 32px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: rgba(255,255,255,0.85);
}

.footer-copy {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.25);
}

.footer-social {
  display: flex;
  gap: 10px;
}

/* ---- PAGINATION ---- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-light);
  font-family: var(--font-main);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: none;
}

.pagination-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(99,102,241,0.35);
}

.pagination-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  box-shadow: none;
}

.pagination-ellipsis {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  padding: 0 4px;
  line-height: 38px;
}

.pagination-info {
  width: 100%;
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

/* ---- RESPONSIVE ---- */

/* Schermo medio: 2 colonne (tag a sinistra, card al centro; letture sotto) */
@media (max-width: 1100px) {
  .site-main {
    grid-template-columns: var(--sidebar-width) 1fr;
  }

  .site-main > .widget-search { grid-column: 1; grid-row: 1; }
  .site-main > .widget-tags   { grid-column: 1; grid-row: 2; }
  .site-main > main           { grid-column: 2; grid-row: 1 / span 2; }

  .site-main > .sidebar-right {
    grid-column: 1 / -1;
    grid-row: 3;
    position: static;
  }
}

/* Schermo piccolo: colonna unica con ordine specifico */
@media (max-width: 900px) {
  .site-main {
    display: flex;
    flex-direction: column;
    gap: 40px;
    padding: 32px 20px;
  }

  .site-main > .widget-search  { order: 1; width: 100%; }
  .site-main > main            { order: 2; }
  .site-main > .widget-tags    { order: 3; }
  .site-main > .sidebar-right  { order: 4; width: 100%; }

  .sidebar {
    position: static;
  }

  .article-wrapper {
    grid-template-columns: 1fr;
    padding: 32px 20px;
  }

  .article-content {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .posts-grid {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding: 52px 20px 44px;
  }

  .page-hero h1 {
    font-size: 2rem;
  }

  .header-inner {
    padding: 0 20px;
  }

  .site-title {
    font-size: 0.9rem;
  }

  .site-tagline {
    display: none;
  }

  .article-title {
    font-size: 1.7rem;
  }
}

@media (max-width: 400px) {
  .social-link span {
    display: none;
  }
}