/* رنگ‌های برند */
  :root {
    --brand: #0f1b34;
    /* اصلی */
    --accent: #ff5c19;
    /* اصلی دوم */
    --muted: #767171;
    /* فرعی */
    --tint: #c2d8ed;
    /* فرعی روشن */
    --bg: var(--brand);
    --fg: #eaf0f7;
    --surface: #132140;
    --border: #1e2b4a;
    --shadow: rgba(0, 0, 0, .25);
    --radius: 14px;
    --maxw: 640px;
  }

  * {
    box-sizing: border-box
  }

  html,
  body {
    margin: 0;
    height: 100%
  }

  body {
    font-family: 'Vazirmatn', Roboto, system-ui, -apple-system, Segoe UI, 'Noto Naskh Arabic', sans-serif;
    background: radial-gradient(circle, rgba(11, 31, 58, 1) 25%, rgba(12, 15, 30, 1) 100%);
    color: var(--fg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  .wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 32px 18px 48px;
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    justify-content: center;
    align-items: center;
  }

  header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin: 8px 0 14px;
  }

  .logo {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--accent), #ff7f4c);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #121212;
    font-weight: 800;
    font-size: 26px;
    box-shadow: 0 10px 30px rgba(255, 92, 25, .25);
    user-select: none;
  }

  .brand {
    display: flex;
    gap: 2px;
    justify-content: center;
    flex-direction: column;
    align-items: center;
  }

  .brand .name {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: .2px
  }

  .brand .sub {
    font-size: 13px;
    color: var(--tint)
  }

  .intro {
    margin: 4px 0 18px;
    color: var(--tint);
    line-height: 1.85;
  }

  .card {
    background: rgba(255, 255, 255, .02);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    backdrop-filter: saturate(120%) blur(6px);
    box-shadow: 0 8px 24px var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 640px;
  }

  .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 16px;
    margin: 10px 0;
    background: var(--surface);
    color: var(--fg);
    text-decoration: none;
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: transform .08s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
    will-change: transform;
  }

  .btn:hover {
    transform: translateY(-2px);
    background: #192a53;
    border-color: #27407a;
    box-shadow: 0 10px 22px rgba(0, 0, 0, .25)
  }

  .btn:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px
  }

  .btn .icon {
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, .06);
    font-size: 16px;
  }

  .btn .txt {
    display: flex;
    flex-direction: column
  }

  .btn .ttl {
    font-weight: 700
  }

  .btn .sub {
    color: var(--tint);
    font-size: 12px
  }

  /* رنگ برند هر شبکه */
  .yt {
    border-color: #b62d2d;
  }

  .yt .icon {
    background: #ff4d4d40
  }

  .yt:hover {
    background: #261b1b;
    border-color: #ff5252
  }

  .ig {
    border-color: #b24bb8
  }

  .ig .icon {
    background: #ff5cb140
  }

  .ig:hover {
    background: #2a1d2b;
    border-color: #ff79c6
  }

  .tg {
    border-color: #2a74a4
  }

  .tg .icon {
    background: #2aa1ff40
  }

  .tg:hover {
    background: #1b2734;
    border-color: #69c0ff
  }

.dc {
    border-color: #5865F2
  }

.dc .icon {
    background: #5865F240
  }

.dc:hover {
    background: #23272A;
    border-color: #404EED
  }

.gh {
  border-color: #e8e8e8;
}

.gh .icon {
  background: #e8e8e840;
}

.gh:hover {
  background: #2f363d;
  border-color: #ffffff;
}



  .cta {
    margin: 16px 0 6px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
  }

  .chip {
    background: linear-gradient(135deg, var(--accent), #ff7f4c);
    color: #161616;
    padding: 10px 14px;
    border-radius: 999px;
    font-weight: 800;
    text-decoration: none;
    border: none;
    box-shadow: 0 10px 22px rgba(255, 92, 25, .25);
    transition: transform .08s ease;
  }

  .chip:hover {
    transform: translateY(-2px)
  }

  .others {
    display: flex;
    flex-direction: row-reverse;
    margin: 50px 0 0 0;
    justify-content: center;
    align-items: center;
    background: white;
    backdrop-filter: saturate(20%) blur(6px);
    opacity: 0.7;
    backdrop-filter: blur(6px);
    box-shadow: 0 8px 24px var(--shadow);
    gap: 50px;
    width: 100vw;

  }

  .others img {
    padding: 15px 2px 15px 2px;
  }

  .promote {
    display: flex;
    justify-content: center;
    font-size: 22pt;
  }

  .promote span {
    color: var(--accent);
    font-family: 'Vazirmatn';
    font-weight: bold;
  }

  footer {
    margin-top: auto;
    padding-top: 18px;
    color: var(--muted);
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    border-top: 1px dashed #223458;
  }

  .sep {
    opacity: .35;
    margin: 0 6px
  }

  /* حالت روشن سیستم */
  @media (prefers-color-scheme: light) {
    :root {
      --fg: #0f1b34;
      --bg: #f5f8fd;
      --surface: #ffffff;
      --border: #d9e2f2;
      --shadow: rgba(16, 24, 48, .08);
    }

    body {
      background: radial-gradient(900px 600px at 15% -10%, #c2d8ed 0%, #eef4fb 55%) no-repeat, #eef4fb
    }

    .btn:hover {
      background: #f5f8ff;
      border-color: #c8d8f0;
      box-shadow: 0 10px 22px rgba(18, 33, 64, .06)
    }

    footer {
      border-color: #d9e2f2
    }

    #main-logo {
      content: url('../assets/images/main_logo.png');
    }

    #edu-logo {
      content: url('../assets/images/eduMind_light.png');
    }

    #pro-logo {
      content: url('../assets/images/proMind_light.png');
    }

    #news-logo {
      content: url('../assets/images/newsMind_light.png');
    }

    .intro {
      color: #0c0f1e;
    }

    .others {
      background: radial-gradient(circle, rgba(11, 31, 58, 1) 25%, rgba(12, 15, 30, 1) 100%);
      opacity: 1;
    }
  }

  @media only screen and (max-width: 600px) {
    .promote {
      font-size: 18px;
    }

    #int-txt {
      font-size: 14px;
    }

    .others {
      gap: 10px;
      width: 100vw;
    }

    #edu-logo,
    #pro-logo {
      width: 90px;
    }

    #news-logo {
      width: 110px;
    }

    .card {
      width: 100vw;
      margin-left: 10px;
      margin-right: 10px;
    }


  }