improved smash intro

<div style="overflow:auto; width:100%"><div style="background-color: black; background: url(https://i.imgur.com/SwcgJhV.gif) ; background-size: 150% 100%; background-repeat: no-repeat; background-position: center"><h1 style="text-align: center; color: white">Welcome to the Smash Bros. room!</h1>
<div style ="color:white; text-indent: 20px">
<h3>Fighters in Ultimate!</h3>
 <details>
  <summary>Mario</summary>
   <p><a href="https://youtu.be/INk1W8OujQI">Mario</a></p>
   <p><a href="https://youtu.be/LlNXKM3sHWU">Luigi</a></p>
   <p><a href="https://youtu.be/w0qVpaEtEF4">Dr. Mario</a></p>
   <p><a href="https://youtu.be/ETVQLZV7J8g">Peach</a></p>
   <p><a href="https://youtu.be/YyzJnpX2ZcY">Daisy</a></p>
   <p><a href="https://youtu.be/JX2mySkglVU">Rosalina & Luma</a></p>
   <p><a href="https://youtu.be/liuwszyDhXM">Bowser</a></p>
   <p><a href="https://youtu.be/fZ2dm9EoJfE">Bowser Jr.</a></p>
 </details>
 <details>
  <summary>The Legend of Zelda</summary>
   <p><a href="https://youtu.be/kfeUdBi67G4">Link</a></p>
   <p><a href="https://youtu.be/qpzDPfCzB7g">Young Link</a></p>
   <p><a href="https://youtu.be/62uBiZfw9w0">Toon Link</a></p>
   <p><a href="https://youtu.be/fMDgFn3qQ_c">Zelda</a></p>
   <p><a href="https://youtu.be/cCQXBEiARns">Sheik</a></p>
   <p><a href="https://youtu.be/Q7pzoLQlrsM">Ganondorf</a></p>
 </details>
 <details>
  <summary>Pokémon</summary>
   <p><a href="https://youtu.be/7LfEvnLc3mI">Pikachu</a></p>
   <p><a href="https://youtu.be/9ZD89yfBCyE">Pichu</a></p>
   <p><a href="https://youtu.be/IlojAAwCfoA">Jigglypuff</a></p>
   <p><a href="https://youtu.be/BcCpZHVIv9Q">Mewtwo</a></p>
   <p><a href="https://youtu.be/dYpf9FoPN_M">Pokémon Trainer</a></p>
   <p><a href="https://youtu.be/7gfpUgrLEwo">Lucario</a></p>
   <p><a href="https://youtu.be/rMCn8NuATaE">Greninja</a></p>
 </details>
 <details>
  <summary>Kirby</summary>
   <p><a href="https://youtu.be/1FPJs_c3qY4">Kirby</a></p>
   <p><a href="https://youtu.be/A99IYmm50RY">Meta Knight</a></p>
   <p><a href="https://youtu.be/bikxqlRPN64">King Dedede</a></p>
 </details>
 <details>
  <summary>Star Fox</summary>
   <p><a href="https://youtu.be/Arw6c0dJHAE">Fox</a></p>
   <p><a href="https://youtu.be/rJj9J5MW8xg">Falco</a></p>
   <p><a href="https://youtu.be/YLG2LGY95f4">Wolf</a></p>
 </details>
 <details>
  <summary>F-Zero</summary>
   <p><a href="https://youtu.be/ayUTQsO6d1E">Captain Falcon</a></p>
 </details>
 <details>
  <summary>Fire Emblem</summary>
   <p><a href="https://youtu.be/icuBIlBPYj0">Marth</a></p>
   <p><a href="https://youtu.be/vQqvKaCne4k">Lucina</a></p>
   <p><a href="https://youtu.be/FtDn6HBn_Qk">Roy</a></p>
   <p><a href="https://youtu.be/-aV6h3jWO6c">Ike</a></p>
   <p><a href="https://youtu.be/7B4w2Tsy9PE">Corrin</a></p>
   <p><a href="https://youtu.be/QBxtnTgUwcM">Robin</a></p>
 </details>
 <details>
  <summary>Mother</summary>
   <p><a href="https://youtu.be/jtlUHmonMGQ">Ness</a></p>
   <p><a href="https://youtu.be/GWjfyyGNL8c">Lucas</a></p>
 </details>
 <details>
  <summary>Metroid</summary>
   <p><a href="https://youtu.be/I9tcvSeemVo">Samus</a></p>
   <p><a href="https://youtu.be/Y4PTxiq11Fk">Zero Suit Samus</a></p>
   <p><a href="https://youtu.be/EDi1Zf_vJsY">Ridley</a></p>
 </details>
 <details>
  <summary>Yoshi's Island</summary>
   <p><a href="https://youtu.be/bQsMQankmEs">Yoshi</a></p>
 </details>
 <details>
  <summary>Donkey Kong</summary>
   <p><a href="https://youtu.be/K7IsUGeFXP0">Donkey Kong</a></p>
   <p><a href="https://youtu.be/AjywYr-fuqY">Diddy Kong</a></p>
 </details>
 <details>
  <summary>Ice Climber</summary>
   <p><a href="https://youtu.be/FUzcsIjn4LY">Ice Climbers</a></p>
 </details>
 <details>
  <summary>Kid Icarus</summary>
   <p><a href="https://youtu.be/M_Pszs9I7S4">Pit</a></p>
   <p><a href="https://youtu.be/q2hJjyP8FGA">Dark Pit</a></p>
   <p><a href="https://youtu.be/0yD_B4ZkdME">Palutena</a></p>
 </details>
 <details>
  <summary>Game & Watch</summary>
   <p><a href="https://youtu.be/Ic0xR07DhSY">Mr. Game & Watch</a></p>
 </details>
 <details>
  <summary>Sonic</summary>
   <p><a href="https://youtu.be/138MW7zOw0M">Sonic</a></p>
 </details>
 <details>
  <summary>Pikmin</summary>
   <p><a href="https://youtu.be/AFHgO8rMzcg">Olimar</a></p>
 </details>
 <details>
  <summary>Xenoblade</summary>
   <p><a href="https://youtu.be/XWeR6XmzZyI">Shulk</a></p>
 </details>
 <details>
  <summary>Metal Gear</summary>
   <p><a href="https://youtu.be/7NLKrPYYQt0">Snake</a></p>
 </details>
 <details>
  <summary>Wario</summary>
   <p><a href="https://youtu.be/4lK7zkTInNA">Wario</a></p>
 </details>
 <details>
  <summary>R.O.B.</summary>
   <p><a href="https://youtu.be/NqL7m9CuGD0">R.O.B.</a></p>
 </details>
 <details>
  <summary>Animal Crossing</summary>
   <p><a href="https://youtu.be/wY_wCijU1Pk">Villager</a></p>
 </details>
 <details>
  <summary>Mega Man</summary>
   <p><a href="https://youtu.be/m4632ulEnNc">Mega Man</a></p>
 </details>
 <details>
  <summary>Wii Fit</summary>
   <p><a href="https://youtu.be/kJbHRv4nCBw">Wii Fit Trainer</a></p>
 </details>
 <details>
  <summary>Street Fighter</summary>
   <p><a href="https://youtu.be/9LAjpoI-ap8">Ryu</a></p>
 </details>
 <details>
  <summary>Final Fantasy</summary>
   <p><a href="https://youtu.be/hccjmuujoD4">Cloud</a></p>
 </details>
 <details>
  <summary>PAC-MAN</summary>
   <p><a href="https://youtu.be/NPzo-TuH0C0">PAC-MAN</a></p>
 </details>
 <details>
  <summary>Punch-Out!!</summary>
   <p><a href="https://youtu.be/vBM09wj8xwE">Little Mac</a></p>
 </details>
 <details>
  <summary>Mii Fighters</summary>
   <p><a href="https://youtu.be/qdSKO-mc2n8">Mii Fighters</a></p>
 </details>
 <details>
  <summary>Duck Hunt</summary>
   <p><a href="https://youtu.be/anhjSVXYL6E">Duck Hunt</a></p>
 </details>
 <details>
  <summary>Bayonetta</summary>
   <p><a href="https://youtu.be/oYe8HpzYebg">Bayonetta</a></p>
 </details>
 <details>
  <summary>Splatoon</summary>
   <p><a href="https://youtu.be/O4-7-bJWUsc">Inkling</a></p>
 </details>
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