UI Deck Building per Gioco Mobile Fantasy

High-quality vertical smartphone UI screenshot of a dark fantasy mobile deck-building lobby screen for a strategy game titled "[Arcane Siege]". Canvas: Tall portrait mobile display with rounded black bezel edges, set over a blurred dark green and purple mystical battlefield background with subtle vignetting. Top branding: Ornate fantasy emblem featuring purple heraldic banners, gold filigree, crossed medieval weapons, glowing runes, and a bold metallic gold logo reading "[Arcane Siege]". Player panel: Below the logo, a rounded dark purple bar with a small uppercase label "BATTLE NAME" and a dark input field displaying "[Nameless Mage]". Deck section: Large rounded dark purple panel titled "BATTLE DECK" in yellow-gold uppercase on the left, and "avg 3.4" in magenta alongside an elixir icon on the right. Directly underneath, an active deck strip of 8 small card thumbnails in a single horizontal row, each with a purple circular elixir cost badge (costs left to right: 3, 3, 2, 5, 4, 4, 4, 2). Main card collection: A 4x4 grid of 16 collectible cards with rounded black borders, dark fantasy illustrations, purple circular elixir badges in top-left corners, and white text labels at the bottom. Selected cards feature glowing gold borders and top-right checkmarks: 1. Cost 3, "Squire" (armored young swordsman, blue cloak), selected 2. Cost 3, "Twin Archers" (hooded archer pulling bow), selected 3. Cost 2, "Bone Pack" (skeletal warriors), selected 4. Cost 5, "Colossus" (massive stone giant), selected 5. Cost 4, "Ember Drake" (red dragon), selected 6. Cost 3, "Gale Imps" (winged ice imps), unselected 7. Cost 4, "Sharpshooter" (marksman with long rifle), selected 8. Cost 5, "Pyromancer" (fire wizard), unselected 9. Cost 4, "Berserker" (dual-axe warrior), unselected 10. Cost 4, "Stag Rider" (horned stag mount), unselected 11. Cost 3, "Frost Adept" (ice sorcerer), unselected 12. Cost 3, "Ballista" (wooden siege weapon), unselected 13. Cost 4, "Storm Spire" (lightning tower), unselected 14. Cost 4, "Meteor" (falling fireball), selected 15. Cost 3, "Arrow Volley" (sky filled with arrows), unselected 16. Cost 2, "Thunderbolt" (bright blue lightning strike), selected Bottom controls: Beveled, glowing interface buttons including a wide golden "QUICK MATCH" button, a purple "VS BOT" button flanked by difficulty toggles ("EASY" highlighted, "HARD" dark), and partially visible bottom buttons: "CREATE ROOM", "CODE", "JOIN". Style: Polished mobile game interface, rich gold and amethyst purple palette, clean typography, glossy glassmorphic panel layers, sharp digital rendering.