:root {
  --bg-main: #0e1a1a;
  --bg-secondary: #102f2f;
  --accent: #26a69a;
  --text-main: #e0f2f1;
  --title: #cdeeea;

  --tag-pubblico: #aed581;
  --tag-year: #ffcc80;
}

body {
  margin: 0;
  font-family: 'Source Sans 3', sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
}

/* HERO */
.page-hero {
  background:
    linear-gradient(rgba(14,26,26,0.65), rgba(14,26,26,0.65)),
    url("../immagini/hero-equilibrio.jpg") center / cover no-repeat;
  padding: 4rem 1.5rem;
  text-align: center;
}

.page-hero h1 {
  font-family: 'Orbitron', sans-serif;
  color: var(--title);
  font-size: clamp(2rem, 5vw, 3rem);
}

.page-hero p {
  max-width: 720px;
  margin: auto;
  opacity: .9;
}

/* NAV */
nav {
  background: #001f1a;
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 1rem;
  border-bottom: 1px solid var(--accent);
}

nav a {
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  text-transform: uppercase;
  font-size: .9rem;
}

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

/* LAYOUT */
main {
  max-width: 1100px;
  margin: auto;
  padding: 3rem 1.5rem;
}

h2 {
  font-family: 'Orbitron', sans-serif;
  color: var(--title);
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* CARD */
.card {
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent);
  overflow: hidden;
}

.card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.card-content {
  padding: 1.2rem;
}

/* SUBTITLE */
.subtitle {
  font-size: .8rem;
  text-transform: uppercase;
  opacity: .8;
}

/* TAG */
.tags, .filter-bar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tag {
  font-size: .75rem;
  padding: .25rem .6rem;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
}


.video-responsive {
  width: 80%;
  height: auto;
  aspect-ratio: 16 / 9;
  display: block;
}

.pubblico {
  background: var(--tag-pubblico);
  color: #2e3d1f;
}

.anno {
  background: var(--tag-year);
  color: #4e2c00;
}

/* FILTER UX */
.tag.active {
  outline: 2px solid var(--accent);
}

/* FOOTER */
footer {
  background: #001f1a;
  text-align: center;
  padding: 1.5rem;
  font-size: .8rem;
}