/* ==========================================================================
   RESET & SYSTEM VARIABLES
   ========================================================================== */
:root {
  --bg-color: #0d1117;
  --card-bg: #161b22;
  --card-border: #30363d;
  --card-border-hover: #8b949e;
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --accent-color: #61afef;
  --highlight-green: #3fb950;
  --highlight-purple: #a371f7;
  --font-mono:
    ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono,
    monospace;
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  padding: 2rem 1rem;
}

.page-container {
  max-width: 1000px;
  margin: 0 auto;
}

/* ==========================================================================
   HEADER PRINCIPALE
   ========================================================================== */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  color: #fff;
  letter-spacing: -0.5px;
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

.divider {
  border: none;
  border-top: 1px solid var(--card-border);
  margin-bottom: 2rem;
}

/* ==========================================================================
   HERO BANNER & PROFILE
   ========================================================================== */
.hero-banner {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.profile-layout {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.profile-avatar {
  flex-shrink: 0;
}

.avatar-image {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--card-border);
}

.hero-bio {
  flex-grow: 1;
}

.hero-bio p {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
}

/* ==========================================================================
   CV DOWNLOAD BUTTON
   ========================================================================== */
.cv-download-container {
  margin-top: 0.85rem;
  margin-bottom: 0.5rem;
}

.cv-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-color);
  background: rgba(97, 175, 239, 0.08);
  border: 1px solid rgba(97, 175, 239, 0.3);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.cv-download-btn:hover {
  background: rgba(97, 175, 239, 0.2);
  border-color: var(--accent-color);
  color: #fff;
  transform: translateY(-1px);
}

/* ==========================================================================
   TIMELINE ORIZZONTALE MINIMAL
   ========================================================================== */
.academic-timeline-horiz {
  position: relative;
  margin-top: 1.25rem;
  padding-top: 1rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
  border-top: 1px solid var(--card-border);
}

.timeline-track {
  position: absolute;
  top: 1.25rem;
  left: 0.75rem;
  right: 0.75rem;
  height: 1px;
  background-color: var(--card-border-hover);
  z-index: 1;
}

.timeline-nodes-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.timeline-step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.node-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--bg-color);
  border: 1px solid var(--accent-color);
  margin-bottom: 0.75rem;
  transition: all 0.2s ease;
}

.active-step .node-dot {
  background-color: var(--accent-color);
  box-shadow: 0 0 8px rgba(97, 175, 239, 0.4);
}

.node-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.step-status {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.status-active {
  color: var(--accent-color);
  font-weight: 600;
}

.node-info strong {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #fff;
  line-height: 1.2;
}

.node-info em {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: normal;
}

/* ==========================================================================
   HORSESHOE / SHOWCASE GRID NAV
   ========================================================================== */
.horseshoe-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.showcase-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  min-height: 180px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.showcase-card:hover {
  transform: translateY(-3px);
  border-color: var(--card-border-hover);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.card-icon {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-color);
}

.showcase-card h2 {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: #fff;
  margin-bottom: 0.4rem;
}

.showcase-card p {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.card-action {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-color);
  margin-top: 1rem;
}

/* Disposizione a ferro di cavallo */
.card-1 {
  grid-column: 1;
  grid-row: 1;
}
.card-2 {
  grid-column: 2;
  grid-row: 1;
}
.card-3 {
  grid-column: 3;
  grid-row: 1;
}
.card-5 {
  grid-column: 1;
  grid-row: 2;
}
.card-4 {
  grid-column: 3;
  grid-row: 2;
}

/* ==========================================================================
   RESPONSIVE (MOBILE)
   ========================================================================== */
@media (max-width: 768px) {
  .profile-layout {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .cv-download-btn {
    justify-content: center;
  }

  .academic-timeline-horiz {
    padding-left: 0;
    padding-right: 0;
  }

  .timeline-track {
    display: none;
  }

  .timeline-nodes-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    text-align: left;
  }

  .timeline-step {
    flex-direction: row;
    gap: 0.75rem;
    align-items: flex-start;
  }

  .node-dot {
    margin-top: 0.25rem;
    margin-bottom: 0;
  }

  .horseshoe-grid {
    grid-template-columns: 1fr;
  }

  .card-1,
  .card-2,
  .card-3,
  .card-4,
  .card-5 {
    grid-column: auto;
    grid-row: auto;
  }
}