/* Flathub Arcade — Mobile-first, modern CSS */

/* ── Variables ── */
:root {
  --blue-3: #3584e4;
  --blue-4: #1c71d8;
  --blue-5: #1a5fb4;
  --dark-1: #77767b;
  --dark-3: #3d3846;
  --dark-4: #241f31;
  --dark-5: #1e1e1e;
  --light-1: #ffffff;
  --light-2: #f6f5f4;
  --light-3: #deddda;
  --green-4: #26a269;
  --yellow-3: #f5c211;
  --orange-3: #ff7800;

  --bg: var(--dark-5);
  --bg-surface: #2a2a2a;
  --bg-card: #333;
  --text: var(--light-2);
  --text-muted: var(--dark-1);
  --accent: var(--blue-3);
  --accent-hover: var(--blue-4);
  --accent-active: var(--blue-5);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 900px;
  --font: "Inter", system-ui, sans-serif;
  --transition: 0.2s ease;
}

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

/* ── Base ── */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
}

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

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

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

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1rem;
}

/* ── Header ── */
.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);

  & .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }

  & .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--text);
  }

  & nav {
    display: flex;
    gap: 0.2rem;

    & a {
      color: var(--text-muted);
      font-weight: 500;
      padding: 0.4rem 1rem;
      border-radius: 100px;
      transition: background-color var(--transition), color var(--transition);

      &:hover {
        color: var(--text);
        background-color: rgba(255, 255, 255, 0.1);
      }
    }
  }
}

/* ── Hero ── */
.hero {
  padding: 3rem 0 2rem;
  text-align: center;

  & .hero-image {
    margin: 0 auto 2rem;
    max-width: 100%;
    border-radius: var(--radius);
    overflow: hidden;

    & img {
      width: 100%;
      height: auto;
      object-fit: contain;
    }
  }

  & h1 {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
  }

  & .tagline {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--text-muted);
    margin-bottom: 2rem;
  }

  & .cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: var(--light-1);
    padding: 0.75rem 1.5rem;
    border-radius: 100px;
    font-weight: 600;
    box-shadow: 0 0 0 0 var(--accent);
    transition: background var(--transition), box-shadow var(--transition);

    &:hover {
      background: var(--accent-hover);
      box-shadow: 0 0 0 2px var(--accent-hover);
      color: var(--light-1);
    }

    &:active {
      background: var(--accent-active);
      box-shadow: 0 0 0 0 var(--accent-active);
    }
  }
}

/* ── Platforms ── */
.platforms {
  padding: 4rem 0 2rem;
  text-align: center;

  & h2 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 2.5rem;
  }

  & .platform-icons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
  }

  & .platform {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
    transition: color var(--transition);

    &:hover {
      color: var(--text);
    }

    & svg {
      width: 64px;
      height: 64px;
    }

    & span {
      font-size: 0.9rem;
      font-weight: 500;
    }
  }
}

@media (min-width: 600px) {
  .platforms {
    & .platform svg {
      width: 80px;
      height: 80px;
    }

    & .platform-icons {
      gap: 3rem;
    }
  }
}

@media (min-width: 900px) {
  .platforms {
    padding: 5rem 0 3rem;

    & .platform svg {
      width: 96px;
      height: 96px;
    }

    & .platform-icons {
      gap: 4rem;
    }
  }
}

/* ── About ── */
.about {
  padding: 3rem 0;

  & h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
  }

  & p {
    color: var(--text-muted);
    max-width: 65ch;
  }

  & .features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 2rem;
  }

  & .feature {
    background: var(--bg-surface);
    padding: 1.25rem;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.06);

    & h3 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 0.25rem;
    }

    & p {
      font-size: 1rem;
      color: var(--text-muted);
    }
  }
}

/* ── Downloads ── */
.downloads {
  padding: 3rem 0;

  & h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
  }

  & .subtitle {
    color: var(--text-muted);
    margin-bottom: 2rem;
  }

  & .version-badge {
    display: inline-block;
    background: var(--bg-surface);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-weight: 500;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: color var(--transition), background var(--transition);

    &:hover {
      color: var(--text);
      background: rgba(255, 255, 255, 0.05);
    }
  }

  & .download-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  & .download-card {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    font-size: 1rem;
    gap: 0.75rem;
    background: var(--bg-surface);
    padding: 1.25rem;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: border-color var(--transition), transform var(--transition);

    &:hover {
      background: rgba(255, 255, 255, 0.04);
    }

    & .platform-info {
      flex: 1;

      & h3 {
        font-weight: 600;
        margin-bottom: 0.125rem;
      }

      & p {
        color: var(--text-muted);
      }
    }

    & .download-btn {
      background: var(--accent);
      color: var(--light-1);
      padding: 0.5rem 1rem;
      border-radius: 100px;
      font-weight: 600;
      text-align: center;
      box-shadow: 0 0 0 0 var(--accent);
      transition: background var(--transition), box-shadow var(--transition);

      &:hover {
        background: var(--accent-hover);
        box-shadow: 0 0 0 2px var(--accent-hover);
        color: var(--light-1);
      }

      &:active {
        background: var(--accent-active);
        box-shadow: 0 0 0 0 var(--accent-active);
      }

      &.secondary {
        background: var(--dark-5);
        color: var(--light-2);
        box-shadow: 0 0 0 0 var(--dark-5);

        &:hover {
          background: var(--dark-4);
          box-shadow: 0 0 0 2px var(--dark-4);
          color: var(--light-1);
        }

        &:active {
          background: var(--dark-5);
          box-shadow: 0 0 0 0 var(--dark-5);
        }
      }
    }
  }
}

/* ── Linux note ── */
.linux-note {
  margin-top: 1.5rem;
  font-size: 1rem;

  & h3 {
    font-weight: 600;
    margin-bottom: 0.5rem;
  }

  & p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
  }

  & code {
    display: inline-block;
    background: var(--bg-surface);
    border: 1px solid rgba(255, 255, 255, 0.06);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: "JetBrains Mono", monospace;
    color: var(--light-2);
  }
}

/* ── Footer ── */
.site-footer {
  padding: 2rem 0;
  margin-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
  color: var(--text-muted);

  & a {
    color: var(--text-muted);

    &:hover {
      color: var(--text);
    }
  }

  & .footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 0.75rem;
  }
}

/* ── Tablet ── */
@media (min-width: 600px) {
  .about .features {
    grid-template-columns: repeat(2, 1fr);
  }

  .downloads .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Desktop ── */
@media (min-width: 900px) {
  .hero {
    padding: 4rem 0 3rem;
  }

  .about .features {
    grid-template-columns: repeat(3, 1fr);
  }

  .downloads .download-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .container {
    padding-inline: 2rem;
  }
}