/* ===== Google Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* ===== Design Tokens ===== */
:root {
  --font: 'Chakra Petch', sans-serif;
  --brand: #090000;
  --accent: #c0392b;
  --accent-hover: #a93226;
  --bg: #faf8f8;
  --bg-alt: #f0ecec;
  --text: #090000;
  --text-muted: #4a4444;
  --border: #d4cccc;
  --card-bg: #ffffff;
  --card-shadow: 0 2px 12px rgba(9, 0, 0, 0.08);
  --nav-bg: rgba(250, 248, 248, 0.92);
  --placeholder-bg: #e8e2e2;
  --placeholder-text: #7a7070;
  --transition: 0.3s ease;
}

[data-theme="dark"] {
  --bg: #111010;
  --bg-alt: #1a1818;
  --text: #f0e8e8;
  --text-muted: #a09898;
  --border: #2e2a2a;
  --card-bg: #1e1c1c;
  --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  --nav-bg: rgba(17, 16, 16, 0.92);
  --placeholder-bg: #2a2626;
  --placeholder-text: #6a6060;
}

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

/* ===== Base ===== */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
}

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

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

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

/* ===== Language toggle ===== */
[data-lang="it"] .en,
[data-lang="en"] .it {
  display: none !important;
}

/* ===== Navigation ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.nav-brand img {
  height: 32px;
  width: auto;
  image-rendering: optimizeQuality;
}

[data-theme="dark"] .nav-brand img {
  filter: invert(1) brightness(0.92);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}

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

.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-icon {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--transition), border-color var(--transition);
}

.btn-icon:hover {
  background: var(--bg-alt);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== Layout ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 4rem 0;
}

section + section {
  border-top: 1px solid var(--border);
}

/* ===== Hero ===== */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 2.5rem;
}

.hero-image {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  object-fit: cover;
}

/* ===== Section headings ===== */
.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 2.5rem;
}

/* ===== Problem section ===== */
.problem-text {
  font-size: 1.1rem;
  line-height: 1.85;
  max-width: 750px;
  color: var(--text-muted);
}

.problem-text strong {
  color: var(--text);
}

/* ===== Value cards (3-col) ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.value-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.value-card:hover {
  box-shadow: var(--card-shadow);
}

.value-card .icon {
  width: 48px;
  height: 48px;
  background: var(--placeholder-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  transition: background var(--transition);
}

.value-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.value-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== Audience ===== */
.audience {
  text-align: center;
  padding: 3rem 0;
}

.audience p {
  font-size: 1.15rem;
  color: var(--text-muted);
}

/* ===== CTA ===== */
.cta-section {
  text-align: center;
  padding: 4rem 0;
}

.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition), transform 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== Contact form ===== */
.contact-section {
  padding: 5rem 0;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font);
  font-size: 1rem;
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--transition), background var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-group .error {
  color: var(--accent);
  font-size: 0.85rem;
  margin-top: 0.3rem;
  display: none;
}

.form-group.invalid .error {
  display: block;
}

.form-group.invalid input,
.form-group.invalid select,
.form-group.invalid textarea {
  border-color: var(--accent);
}

.form-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 2rem;
}

/* ===== Roadmap ===== */
.roadmap-section {
  padding: 5rem 0;
}

.roadmap-intro {
  text-align: center;
  margin-bottom: 3rem;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.roadmap-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.roadmap-card:hover {
  box-shadow: var(--card-shadow);
}

.roadmap-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  border-radius: 4px 0 0 4px;
}

.roadmap-card .card-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--border);
  line-height: 1;
  margin-bottom: 0.75rem;
  transition: color var(--transition);
}

.roadmap-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.roadmap-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.roadmap-card .badge {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 20px;
  background: var(--bg-alt);
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: border-color var(--transition);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 0.75rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

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

  .hero-image img {
    border-radius: 8px;
  }

  section {
    padding: 3rem 0;
  }

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

@media (max-width: 480px) {
  .nav-inner {
    padding: 0 1rem;
  }

  .container {
    padding: 0 1rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }
}