* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: #050505;
    color: #fff;
    font-family: 'Press Start 2P', cursive;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.arena {
    width: 900px;
    max-width: 100%;
    height: 650px;
    background: radial-gradient(circle at center, #1a2333 0%, #0d1117 100%);
    border: 6px solid #444;
    border-radius: 15px;
    position: relative;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 80px rgba(0, 0, 0, 1), inset 0 0 50px rgba(0,0,0,0.8);
    overflow: visible;
}

/* Background details */
.arena::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 180px;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    border-radius: 9px 9px 0 0;
    z-index: 0;
    pointer-events: none;
}

/* SELECTION SCREEN */
#selection-screen {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(13, 17, 23, 0.95);
    text-align: center;
    padding: 20px;
    z-index: 20;
}

#selection-screen h1 {
    color: #ffeb3b;
    margin-bottom: 10px;
    font-size: 28px;
    text-shadow: 0 5px 15px rgba(255, 235, 59, 0.3);
}

#selection-screen p {
    color: #aaa;
    font-size: 10px;
    margin-bottom: 40px;
}

.character-grid {
    display: flex;
    gap: 20px;
    width: 100%;
    justify-content: center;
}

.character-card {
    background: #161b22;
    border: 3px solid #30363d;
    border-radius: 12px;
    padding: 25px 15px;
    width: 220px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.character-card:hover {
    transform: translateY(-15px) scale(1.05);
    border-color: #3fb950;
    box-shadow: 0 15px 40px rgba(63, 185, 80, 0.3);
}

.char-icon {
    font-size: 50px;
    margin-bottom: 20px;
    filter: drop-shadow(0 5px 5px rgba(0,0,0,0.5));
}

.character-card h2 {
    font-size: 12px;
    color: #fff;
    margin-bottom: 15px;
    line-height: 1.4;
}

.char-desc {
    font-size: 9px !important;
    line-height: 1.6;
    color: #8b949e !important;
    font-family: sans-serif;
}

/* BATTLE SCREEN UI */
.ui-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: rgba(0, 0, 0, 0.6);
    border-bottom: 4px solid #222;
    z-index: 1;
}

.health-container {
    width: 35%;
}

.health-container.right {
    text-align: right;
}

.name-tag {
    font-size: 14px;
    margin-bottom: 10px;
    color: #fff;
    text-shadow: 2px 2px 0 #000;
}

#koenk-name-tag {
    color: #f85149;
}

.health-bar {
    width: 100%;
    height: 25px;
    background: #222;
    border: 3px solid #fff;
    border-radius: 5px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.health-fill {
    width: 100%;
    height: 100%;
    background: #3fb950;
    transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), background-color 0.4s;
}

.hp-text {
    font-size: 12px;
    margin-top: 8px;
    color: #ccc;
}

.vs {
    font-size: 30px;
    color: #f85149;
    text-shadow: 3px 3px 0 #000, 0 0 20px rgba(248, 81, 73, 0.5);
    animation: pulse 1.5s infinite alternate;
}

/* BATTLEFIELD */
.battlefield {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 40px 60px 20px 60px;
    position: relative;
    z-index: 1;
}

.fighter {
    width: 250px;
    position: relative;
    transition: transform 0.1s;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.fighter img {
    width: 100%;
    filter: drop-shadow(0 15px 15px rgba(0,0,0,0.6));
    transition: all 0.3s ease;
}

.mac-enemy {
    font-size: 100px;
    text-align: center;
    filter: drop-shadow(0 15px 15px rgba(0,0,0,0.6));
    animation: float 4s infinite ease-in-out;
}

/* FLOATING DAMAGE TEXT */
.dmg-text {
    position: absolute;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    text-shadow: 2px 2px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000;
    pointer-events: none;
    z-index: 50;
    animation: floatUp 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}
.dmg-text.heal {
    color: #3fb950;
}
.dmg-text.crit {
    color: #ffeb3b;
    font-size: 32px;
}
.dmg-text.enemy-dmg {
    color: #f85149;
}

@keyframes floatUp {
    0% { transform: translateY(0) scale(0.5); opacity: 1; }
    50% { transform: translateY(-50px) scale(1.2); opacity: 1; }
    100% { transform: translateY(-80px) scale(1); opacity: 0; }
}

/* ANIMATIONS */
.attack-left { animation: dashLeft 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
.attack-right { animation: dashRight 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
.hurt { animation: shake 0.4s; filter: brightness(2) sepia(1) hue-rotate(-50deg) saturate(5); }
.dodge { animation: dodgeAnim 0.4s ease-in-out; }
.transform { animation: bossTransform 1.5s ease-in-out forwards; }
.screen-shake { animation: shake 0.5s; }

@keyframes dashLeft {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(80px) scale(1.1); }
}

@keyframes dashRight {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(-80px) scale(1.1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-15px); }
    50% { transform: translateX(15px); }
    75% { transform: translateX(-15px); }
}

@keyframes dodgeAnim {
    0%, 100% { transform: translateX(0); opacity: 1; }
    50% { transform: translateX(-40px); opacity: 0.5; }
}

@keyframes bossTransform {
    0% { transform: scale(1); filter: brightness(1); }
    50% { transform: scale(1.5) translateY(-20px); filter: brightness(3) sepia(1) hue-rotate(90deg) saturate(10); }
    100% { transform: scale(1.2); filter: brightness(1); }
}

@keyframes pulse {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes float-crown {
    0%, 100% { transform: translateX(-50%) rotate(15deg) translateY(0); }
    50% { transform: translateX(-50%) rotate(15deg) translateY(-15px); }
}

/* BOTTOM UI */
.ui-bottom {
    height: 190px;
    background: #0d1117;
    border-top: 6px solid #30363d;
    border-radius: 0 0 9px 9px;
    display: flex;
    z-index: 10;
}

.message-box {
    flex: 1;
    padding: 25px;
    font-size: 14px;
    line-height: 1.8;
    border-right: 6px solid #30363d;
    display: flex;
    align-items: center;
    white-space: pre-wrap; 
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
}

.action-menu {
    width: 55%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 6px;
    background: #30363d;
    padding: 6px;
}

.action-btn {
    background: #161b22;
    color: #c9d1d9;
    border: 2px solid #161b22;
    border-radius: 5px;
    font-family: 'Press Start 2P', cursive;
    font-size: 9px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    padding: 10px 15px;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.action-btn span {
    color: #8b949e;
    font-size: 7px;
    margin-top: 5px;
}

.action-btn:hover:not(:disabled) {
    background: #21262d;
    border-color: #3fb950;
    transform: scale(0.98);
}

.action-btn:disabled {
    background: #0d1117;
    color: #484f58;
    cursor: not-allowed;
    border-color: #0d1117;
}

/* GAME OVER SCREEN */
.game-over {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.95);
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    text-align: center;
}

.game-over h1 {
    color: #ffeb3b;
    font-size: 50px;
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(255, 235, 59, 0.5);
}

.game-over p {
    font-size: 14px;
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 600px;
}

.back-btn {
    padding: 15px 30px;
    background: #3fb950;
    color: #000;
    text-decoration: none;
    border: none;
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    display: inline-block;
    border-radius: 5px;
    box-shadow: 0 5px 0 #2ea043;
    transition: transform 0.1s, box-shadow 0.1s;
}

.back-btn:active {
    transform: translateY(5px);
    box-shadow: 0 0 0 #2ea043;
}

@media (max-width: 768px) {
    .arena {
        height: 100vh;
        border: none;
        border-radius: 0;
    }
    .ui-bottom {
        flex-direction: column;
        height: auto;
    }
    .message-box {
        border-right: none;
        border-bottom: 4px solid #30363d;
        padding: 15px;
        min-height: 80px;
        font-size: 12px;
    }
    .action-menu {
        width: 100%;
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, auto);
    }
    .action-btn {
        padding: 10px;
        font-size: 8px;
    }
    .battlefield {
        padding: 20px;
        flex: 1;
    }
    .fighter {
        width: 160px;
    }
    .mac-enemy {
        font-size: 60px;
    }
    .health-bar {
        height: 15px;
    }
    .ui-header {
        padding: 10px;
    }
    .name-tag {
        font-size: 10px;
    }
    .vs {
        font-size: 16px;
    }
    .character-grid {
        flex-direction: column;
        align-items: center;
        overflow-y: auto;
        padding-bottom: 20px;
    }
    .character-card {
        width: 90%;
        padding: 15px;
    }
    #selection-screen h1 {
        font-size: 20px;
    }
}