/* ============================================
   MATTEO ALESSANDRO — COMPETENCE PORTFOLIO
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600&display=swap');

:root {
  --bg-primary: #0a0a09;
  --bg-secondary: #131210;
  --bg-card: #1a1917;
  --text-primary: #f5f4f0;
  --text-secondary: #a8a29e;
  --text-muted: #6b6560;
  --bubble-text: #0a0a09;
  --accent: #d4a373;
  --accent-dim: rgba(212, 163, 115, 0.15);
  --border: rgba(255, 255, 255, 0.06);
  --font-mono: 'JetBrains Mono', monospace;
}

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

html { scroll-behavior: smooth; font-size: 15px; }

body {
  font-family: var(--font-mono);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.container--narrow { max-width: 860px; }

/* --- Navigation --- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 10, 9, 0.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 2rem; max-width: 1200px; margin: 0 auto;
}

.logo {
  font-family: var(--font-mono); font-size: 0.875rem; letter-spacing: -0.5px;
}

.nav-links {
  display: flex; list-style: none; gap: 2rem; align-items: center;
}

.nav-links li a {
  font-size: 0.875rem; color: var(--text-secondary); transition: color 0.2s;
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--accent);
}

/* Hamburger — hidden on desktop */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
  border-radius: 1px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 0;
    transition: right 0.3s ease;
    z-index: 99;
    overflow-y: auto;
  }

  .nav-links.open { right: 0; }

  .nav-links li { border-bottom: 1px solid var(--border); }

  .nav-links a {
    display: block;
    padding: 1rem 0;
    font-size: 0.9375rem;
  }

  /* Overlay when menu is open */
  .nav-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 98;
  }

  .nav-overlay.active { display: block; }
}

/* --- Hero --- */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 6rem 2rem 4rem; position: relative; overflow: hidden;
}

.inner-hero {
  min-height: 50vh;
  padding-top: 8rem;
}

.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(212, 163, 115, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner { text-align: center; max-width: 800px; position: relative; z-index: 1; }

.hero-label {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted);
  margin-bottom: 2rem; letter-spacing: 2px; text-transform: uppercase; opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 300; line-height: 1.2;
  letter-spacing: -1.5px; margin-bottom: 2.5rem; opacity: 0;
  animation: fadeUp 0.6s ease 0.15s forwards;
}

/* --- Terminal Typing Line --- */
.terminal-line {
  font-family: var(--font-mono); font-size: clamp(0.875rem, 2vw, 1.125rem);
  color: var(--accent); margin-bottom: 2rem; min-height: 2em; opacity: 0;
  animation: fadeUp 0.6s ease 0.3s forwards;
}

.prompt { color: var(--text-muted); }

.typing-text { transition: none; }

.cursor {
  display: inline-block; width: 0.6em; height: 1.2em; background: var(--accent);
  margin-left: 2px; vertical-align: middle; animation: blink 1s step-end infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.hero-subtitle {
  font-size: clamp(0.9375rem, 1.5vw, 1.125rem); color: var(--text-secondary);
  margin-bottom: 2.5rem; line-height: 1.8; opacity: 0;
  animation: fadeUp 0.6s ease 0.45s forwards;
}

.hero-subtitle strong { color: var(--text-primary); font-weight: 500; }

/* --- Buttons --- */
.btn {
  display: inline-block; padding: 0.875rem 2rem; border-radius: 6px;
  font-size: 0.9375rem; font-weight: 500; transition: all 0.2s; opacity: 0;
  animation: fadeUp 0.6s ease 0.6s forwards;
}

.btn-primary {
  background: var(--accent); color: #0a0a09; border: none; cursor: pointer;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(212, 163, 115, 0.3); }

/* --- Sections --- */
.section { padding: 8rem 0; }

.section-dark { background: var(--bg-secondary); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-heading {
  font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 400; letter-spacing: -1px;
  margin-bottom: 1rem;
}

.section-lead {
  font-size: 1.125rem; color: var(--text-secondary); max-width: 600px; margin-bottom: 4rem; line-height: 1.8;
}

/* --- Competence Grid --- */
.competence-grid { display: grid; gap: 1.5rem; }

.comp-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  padding: 2.5rem; transition: all 0.3s; opacity: 0; transform: translateY(30px);
}

.comp-card.visible { opacity: 1; transform: translateY(0); }

.comp-card:hover { border-color: var(--accent-dim); background: rgba(212, 163, 115, 0.03); }

.approach-item.visible { opacity: 1; transform: translateY(0); transition: all 0.6s ease; }
.proof-card.visible { opacity: 1; transform: translateY(0); transition: all 0.4s ease; }

.card-icon {
  font-size: 2rem; margin-bottom: 1.25rem; display: block;
}

.competence-card h3 {
  font-size: 1.375rem; font-weight: 600; margin-bottom: 0.75rem; letter-spacing: -0.5px;
}

.card-pitch { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 0.9375rem; }

.card-benefits { list-style: none; display: flex; flex-direction: column; gap: 1rem; }

.card-benefits li {
  color: var(--text-secondary); font-size: 0.875rem; line-height: 1.6;
}

.card-benefits li strong { color: var(--text-primary); font-weight: 500; }

/* --- Approach --- */
.approach-list { display: flex; flex-direction: column; gap: 3.5rem; margin-top: 4rem; }

.approach-item { display: grid; grid-template-columns: 2rem 1fr; gap: 1.5rem; opacity: 0; transform: translateY(30px); transition: all 0.6s ease; }
.approach-item.visible { opacity: 1; transform: translateY(0); }

.approach-number {
  font-family: var(--font-mono); font-size: 0.875rem; color: var(--accent);
  padding-top: 0.25rem; grid-row: 1 / span 3;
}

.approach-item h3 {
  font-size: 1.25rem; font-weight: 600; margin-bottom: 0.75rem; letter-spacing: -0.3px;
  grid-column: 2; white-space: normal; word-wrap: break-word; overflow-wrap: break-word;
}

.approach-item p { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.8; grid-column: 2; white-space: normal; word-wrap: break-word; overflow-wrap: break-word; }

/* --- Proof Grid --- */
.proof-grid { display: grid; gap: 1.5rem; margin-top: 4rem; }

.proof-card {
  background: var(--bg-primary); border: 1px solid var(--border); border-radius: 12px;
  padding: 2.5rem; transition: all 0.3s; opacity: 0; transform: translateY(30px);
}

.proof-card.visible { opacity: 1; transform: translateY(0); }

.proof-card:hover { border-color: var(--accent-dim); }

.proof-label {
  font-family: var(--font-mono); font-size: 0.6875rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 1rem; display: block;
}

.proof-card h3 { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.75rem; letter-spacing: -0.3px; }

.proof-card p { color: var(--text-secondary); font-size: 0.875rem; line-height: 1.7; margin-bottom: 1.25rem; }

/* --- Tags --- */
.tag {
  display: inline-block; padding: 0.2rem 0.6rem; border-radius: 100px; font-size: 0.6875rem;
  background: var(--accent-dim); color: var(--accent); margin-right: 0.375rem; margin-bottom: 0.25rem;
}

.proof-tags { display: flex; flex-wrap: wrap; }

/* --- Contact --- */
.section-contact { padding: 8rem 0; background: var(--bg-primary); border-top: 1px solid var(--border); }

.contact-inner { text-align: center; }

.contact-text { font-size: 1.125rem; color: var(--text-secondary); margin-bottom: 3rem; line-height: 1.8; max-width: 600px; margin-left: auto; margin-right: auto; }

.contact-links { display: flex; justify-content: center; gap: 3rem; flex-wrap: wrap; margin-bottom: 3rem; }

.contact-link {
  text-align: center; padding: 1.5rem 2rem; border: 1px solid var(--border); border-radius: 8px;
  transition: all 0.3s; min-width: 200px;
}

.contact-link:hover { border-color: var(--accent-dim); background: rgba(212, 163, 115, 0.03); transform: translateY(-2px); }

.contact-label { display: block; font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.5rem; }
.contact-value { color: var(--text-primary); font-size: 0.9375rem; }

.contact-location { color: var(--text-muted); font-size: 0.8125rem; margin-top: 1.5rem; }

.contact-piva {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  margin-top: 0.75rem;
}

/* --- Footer --- */
.footer { padding: 3rem 0; text-align: center; border-top: 1px solid var(--border); }
.footer p { color: var(--text-muted); font-size: 0.75rem; }

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================
   OPENSOURCE PAGE STYLES
   ============================================ */

.os-intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.os-stat-card {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.os-stat-number {
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.os-stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Benefits List */
.benefits-list { display: flex; flex-direction: column; gap: 3rem; }

.benefit-card {
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.benefit-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.benefit-icon { font-size: 2rem; display: block; margin-bottom: 1rem; }

.benefit-card h3 {
  font-size: 1.5rem; font-weight: 600; margin-bottom: 1rem; letter-spacing: -0.5px;
}

.benefit-card p { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.8; margin-bottom: 1rem; }

.benefit-example {
  background: rgba(212, 163, 115, 0.04);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.benefit-example strong { color: var(--accent); }

/* Open Source Powers Grid */
.os-powers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.os-power-card {
  padding: 2rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.os-power-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-4px);
}

.os-power-card h4 {
  font-size: 1.125rem; font-weight: 600; margin-bottom: 0.75rem; letter-spacing: -0.3px;
}

.os-power-card p { color: var(--text-secondary); font-size: 0.875rem; line-height: 1.7; }

/* Commitment List */
.commitment-list { display: flex; flex-direction: column; gap: 2.5rem; margin-top: 3rem; }

.commitment-item {
  display: flex; gap: 1.25rem; align-items: flex-start; margin-bottom: 0.5rem;
}

.commitment-number {
  font-family: var(--font-mono); font-size: 0.875rem; color: var(--accent);
  padding-top: 0.25rem; min-width: 1.5rem; flex-shrink: 0;
}

.commitment-item h4 {
  font-size: 1.1rem; font-weight: 600; margin-bottom: 0.35rem; letter-spacing: -0.3px; white-space: nowrap;
}

.commitment-item p { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.7; }

/* ============================================
   PRIVACY PAGE STYLES
   ============================================ */

.privacy-hero-subtitle {
  max-width: 700px;
}

/* Big Data Dangers Section */
.danger-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 3rem;
}

.danger-card {
  padding: 2.5rem;
  background: var(--bg-primary);
  border: 1px solid rgba(200, 80, 60, 0.15);
  border-radius: 12px;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.danger-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.danger-card:hover {
  border-color: rgba(200, 80, 60, 0.3);
}

.danger-icon { font-size: 2rem; display: block; margin-bottom: 1rem; }

.danger-card h3 {
  font-size: 1.375rem; font-weight: 600; margin-bottom: 0.75rem; letter-spacing: -0.5px;
}

.danger-card p { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.8; }

/* Alternatives Section */
.alternatives-intro {
  margin-top: 4rem;
  text-align: center;
}

.alternatives-intro p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

/* Bubble Visualization */
.bubble-viz-container {
  position: relative;
  width: 100%;
  min-height: 700px;
  margin-top: 3rem;
  overflow: hidden;
  border-radius: 12px;
}

.bubble-visualizer {
  width: 100%;
  height: 650px;
  position: relative;
}

/* Central (parent) bubble */
.bubble-parent {
  position: absolute;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--accent), #b8864a);
  color: #0a0a09;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.25rem;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  z-index: 10;
  user-select: none;
}

.bubble-parent:hover {
  transform: translate(-50%, -50%) scale(1.08);
  box-shadow: 0 0 40px rgba(212, 163, 115, 0.4);
}

.bubble-parent .bubble-name {
  font-size: clamp(0.7rem, 1.5vw, 0.9rem);
  line-height: 1.3;
  pointer-events: none;
}

/* Child (alternative) bubble */
.bubble-child {
  position: absolute;
  transform: translate(-50%, -50%) scale(0);
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.25), rgba(var(--accent-rgb), 0.1));
  color: #0a0a09;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease, opacity 0.4s ease;
  z-index: 5;
  user-select: none;
  pointer-events: none;
  opacity: 0;
}

.bubble-child.visible {
  transform: translate(-50%, -50%) scale(1);
  pointer-events: auto;
  opacity: 1;
}

.bubble-child:hover {
  box-shadow: 0 0 30px rgba(45, 74, 62, 0.6);
}

.bubble-child .bubble-name {
  font-size: clamp(0.5rem, 1vw, 0.7rem);
  line-height: 1.3;
  pointer-events: none;
}

/* Tooltip */
.bubble-tooltip {
  position: absolute;
  background: rgba(26, 25, 23, 0.95);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  line-height: 1.6;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  max-width: 260px;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  backdrop-filter: blur(8px);
}

.bubble-tooltip.active {
  opacity: 1;
}

/* Connection lines */
.connection-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, var(--accent-dim), transparent);
  transform-origin: left center;
  z-index: 2;
  pointer-events: none;
}

/* Category tags in privacy page */
.privacy-category {
  margin-top: 4rem;
}

.privacy-category h3 {
  font-size: 1.5rem; font-weight: 600; margin-bottom: 1.5rem; letter-spacing: -0.5px;
  color: var(--accent);
}

.privacy-alternatives-list {
  display: grid;
  gap: 1rem;
}

.privacy-alt-item {
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.privacy-alt-icon { font-size: 1.25rem; }

.privacy-alt-item h4 {
  font-size: 0.9375rem; font-weight: 600; margin-bottom: 0.25rem; letter-spacing: -0.2px;
}

.privacy-alt-item p {
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-inner { padding: 1rem 1.25rem; }
  .competence-grid, .proof-grid { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; align-items: center; }
  .approach-item { grid-template-columns: 1.5rem 1fr; gap: 1rem; }
  .section { padding: 5rem 0; }

  /* Adjust bubble visualizer for mobile */
  .bubble-visualizer { height: 500px; }
}

@media (max-width: 480px) {
  .nav-links a { font-size: 0.75rem; }
  .hero-title { letter-spacing: -0.5px; }
}