/* Progressum Labs – super light, system fonts only */
:root {
  --bg: #0f1419;
  --bg-card: #1a2332;
  --text: #e6edf3;
  --text-muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #2d3a4d;
  --error: #ef4444;
  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

/* Header / Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 20, 25, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  gap: 1rem;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}
.nav-logo:hover { color: var(--accent); }
.nav-logo-icon {
  display: flex;
  width: 28px;
  height: 28px;
}
.nav-logo-icon svg { width: 100%; height: 100%; }
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  border-radius: var(--radius);
}
.nav-toggle:hover { background: var(--bg-card); }
.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
}
.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--text); background: var(--bg-card); }
.nav-link.active { color: var(--accent); }

/* Hero */
.hero {
  padding: 4rem 1rem 3rem;
  text-align: center;
}
.hero-inner { max-width: 640px; margin: 0 auto; }
.hero-title {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
}
.hero-sub {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.btn-primary {
  color: #fff;
  background: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); }

/* Container */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Section common */
.section-title {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
}
.section-subtitle {
  margin: 0 0 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Sfide (problema) */
.sfide {
  padding: 3rem 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.sfide .section-subtitle { margin-bottom: 1.25rem; }
.sfide-list {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-muted);
  line-height: 1.6;
}
.sfide-list li { margin-bottom: 0.5rem; }
.sfide-cta {
  margin: 0;
  text-align: center;
  font-weight: 500;
  color: var(--text);
}

/* Servizi */
.servizi {
  padding: 3rem 0;
}
.servizi .section-subtitle { margin-bottom: 1.5rem; }
.servizi-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.card-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
  color: var(--accent);
}
.card-icon svg { width: 100%; height: 100%; }
.card-title {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 600;
}
.card-text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Perché noi */
.perche {
  padding: 3rem 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}
.perche-list {
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-muted);
  line-height: 1.7;
}
.perche-list li { margin-bottom: 0.75rem; }
.perche-cta {
  margin: 0;
  text-align: center;
}

/* Contatti / Form */
.contatti {
  padding: 3rem 0 4rem;
}
.contact-form {
  max-width: 420px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
}
.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.6rem 0.75rem;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238b9cb3' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-error {
  font-size: 0.85rem;
  color: var(--error);
}
.form-group input.invalid,
.form-group textarea.invalid,
.form-group select.invalid { border-color: var(--error); }
.form-success {
  max-width: 420px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.form-success[hidden] { display: none !important; }
.form-success-text {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text);
}

/* Footer */
.footer {
  padding: 0 0 1.5rem;
  border-top: 1px solid var(--border);
}
.footer-disclaimer {
  padding: 1rem 1rem 0.75rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.footer-disclaimer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1rem;
}
.footer-copy {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.footer-link {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
}
.footer-link:hover { color: var(--accent); }
.footer-link-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: underline;
  font-family: var(--font);
}
.footer-link-btn:hover { color: var(--accent); }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}
.cookie-banner[hidden] { display: none !important; }
.cookie-banner-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}
.cookie-banner-text {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.4;
  flex: 1 1 280px;
}
.cookie-banner-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}
.cookie-banner-reject {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.cookie-banner-reject:hover {
  background: var(--bg);
  color: var(--text);
}

/* Responsive */
@media (min-width: 640px) {
  .servizi-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 639px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-link { display: block; padding: 0.75rem; }
}